# HG changeset patch
# User Mike Becker <universe@uap-core.de>
# Date 1706443818 -3600
# Node ID 16e5b9d32754e18dd91ce478c62382131be64719
# Parent  ce97ff16f00e51533a38432557de9cc737d62bbc
update build files to latest uwproj

diff -r ce97ff16f00e -r 16e5b9d32754 INSTALL
--- a/INSTALL	Sun Jan 28 12:39:08 2024 +0100
+++ b/INSTALL	Sun Jan 28 13:10:18 2024 +0100
@@ -29,22 +29,15 @@
 Build instructions
 ------------------
 
-When using gcc, just run
-
-    make
+To build a release version, run configure with the following option:
 
-To use a different compiler run
-
-    make CONF=<config>
+    ./configure --release
 
-Available configs:
-gcc
-clang
-suncc
-bsd
-osx
-mingw
+The script detects your toolchain automatically. In case you want
+a different compiler, you can set the CC environment variable before
+running configure.
 
+    CC=clang ./configure --release
 
 Install
 -------
@@ -56,7 +49,9 @@
 
 This installs the binaries to /usr. To install to an other location, run
 
-    make install PREFIX=/your/prefix
+    ./configure --release --prefix=/your/prefix
+
+before running make.
 
 Note: The install target doesn't work on Windows, therefore you need to install
 the two executables manually.
diff -r ce97ff16f00e -r 16e5b9d32754 Makefile
--- a/Makefile	Sun Jan 28 12:39:08 2024 +0100
+++ b/Makefile	Sun Jan 28 13:10:18 2024 +0100
@@ -26,8 +26,6 @@
 # POSSIBILITY OF SUCH DAMAGE.
 #
 
-PREFIX=/usr
-
 all: config.mk build/bin build/lib build/ucx build/dav build/libidav build/test build/tool ucx libidav dav test
 
 ucx: FORCE
@@ -78,7 +76,7 @@
 	rm -f config.mk
 
 install: all
-	cd make; $(MAKE) -f install.mk install DESTDIR=$(DESTDIR) PREFIX=$(PREFIX)
+	cd make; $(MAKE) -f install.mk install
 
 FORCE:
 
diff -r ce97ff16f00e -r 16e5b9d32754 configure
--- a/configure	Sun Jan 28 12:39:08 2024 +0100
+++ b/configure	Sun Jan 28 13:10:18 2024 +0100
@@ -1,35 +1,48 @@
 #!/bin/sh
 
-
-PREFIX=/usr
-EPREFIX=$PREFIX
-
-BINDIR=
-SBINDIR=
-LIBDIR=
-LIBEXECDIR=
-DATADIR=
-SYSCONFDIR=
-SHAREDSTATEDIR=
-LOCALSTATEDIR=
-INCLUDEDIR=
-INFODIR=
-MANDIR=
-
-OS=`uname -s`
-OS_VERSION=`uname -r`
-
+# create temporary directory
 TEMP_DIR=".tmp-`uname -n`"
-mkdir -p "$TEMP_DIR"
-if [ $? -ne 0 ]; then
-    echo "Cannot create tmp dir"
+rm -Rf "$TEMP_DIR"
+if mkdir -p "$TEMP_DIR"; then
+    :
+else
+    echo "Cannot create tmp dir $TEMP_DIR"
     echo "Abort"
+    exit 1
 fi
 touch "$TEMP_DIR/options"
 touch "$TEMP_DIR/features"
 
+# define standard variables
+# also define standard prefix (this is where we will search for config.site)
+prefix=/usr
+exec_prefix=
+bindir=
+sbindir=
+libdir=
+libexecdir=
+datarootdir=
+datadir=
+sysconfdir=
+sharedstatedir=
+localstatedir=
+runstatedir=
+includedir=
+infodir=
+localedir=
+mandir=
+
+# custom variables
+
 # features
 
+# clean abort
+abort_configure()
+{
+    rm -Rf "$TEMP_DIR"
+    exit 1
+}
+
 # help text
 printhelp()
 {
@@ -47,12 +60,14 @@
   --sysconfdir=DIR        system configuration files [PREFIX/etc]
   --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
   --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
+  --runstatedir=DIR       run-time variable data [LOCALSTATEDIR/run]
   --libdir=DIR            object code libraries [EPREFIX/lib]
   --includedir=DIR        C header files [PREFIX/include]
   --datarootdir=DIR       read-only arch.-independent data root [PREFIX/share]
   --datadir=DIR           read-only architecture-independent data [DATAROOTDIR]
   --infodir=DIR           info documentation [DATAROOTDIR/info]
   --mandir=DIR            man documentation [DATAROOTDIR/man]
+  --localedir=DIR         locale-dependent data [DATAROOTDIR/locale]
 
 __EOF__
 }
@@ -60,99 +75,97 @@
 #
 # parse arguments
 #
+BUILD_TYPE="default"
 for ARG in "$@"
 do
     case "$ARG" in
-        "--prefix="*)         PREFIX=${ARG#--prefix=} ;;
-        "--exec-prefix="*)    EPREFIX=${ARG#--exec-prefix=} ;;
-        "--bindir="*)         BINDIR=${ARG#----bindir=} ;;
-        "--sbindir="*)        SBINDIR=${ARG#--sbindir=} ;;
-        "--libdir="*)         LIBDIR=${ARG#--libdir=} ;;
-        "--libexecdir="*)     LIBEXECDIR=${ARG#--libexecdir=} ;;
-        "--datadir="*)        DATADIR=${ARG#--datadir=} ;;
-        "--sysconfdir="*)     SYSCONFDIR=${ARG#--sysconfdir=} ;;
-        "--sharedstatedir="*) SHAREDSTATEDIR=${ARG#--sharedstatedir=} ;;
-        "--localstatedir="*)  LOCALSTATEDIR=${ARG#--localstatedir=} ;;
-        "--includedir="*)     INCLUDEDIR=${ARG#--includedir=} ;;
-        "--infodir="*)        INFODIR=${ARG#--infodir=} ;;
-        "--mandir"*)          MANDIR=${ARG#--mandir} ;;
-        "--help"*) printhelp; rm -Rf "$TEMP_DIR"; exit 1 ;;
-        "-"*) echo "unknown option: $ARG"; rm -Rf "$TEMP_DIR"; exit 1 ;;
+        "--prefix="*)         prefix=${ARG#--prefix=} ;;
+        "--exec-prefix="*)    exec_prefix=${ARG#--exec-prefix=} ;;
+        "--bindir="*)         bindir=${ARG#----bindir=} ;;
+        "--sbindir="*)        sbindir=${ARG#--sbindir=} ;;
+        "--libdir="*)         libdir=${ARG#--libdir=} ;;
+        "--libexecdir="*)     libexecdir=${ARG#--libexecdir=} ;;
+        "--datarootdir="*)    datarootdir=${ARG#--datarootdir=} ;;
+        "--datadir="*)        datadir=${ARG#--datadir=} ;;
+        "--sysconfdir="*)     sysconfdir=${ARG#--sysconfdir=} ;;
+        "--sharedstatedir="*) sharedstatedir=${ARG#--sharedstatedir=} ;;
+        "--localstatedir="*)  localstatedir=${ARG#--localstatedir=} ;;
+        "--includedir="*)     includedir=${ARG#--includedir=} ;;
+        "--infodir="*)        infodir=${ARG#--infodir=} ;;
+        "--mandir"*)          mandir=${ARG#--mandir} ;;
+        "--localedir"*)       localedir=${ARG#--localedir} ;;
+        "--help"*) printhelp; abort_configure ;;
+        "--debug")           BUILD_TYPE="debug" ;;
+        "--release")         BUILD_TYPE="release" ;;
+        "-"*) echo "unknown option: $ARG"; abort_configure ;;
     esac
 done
 
-# set dir variables
-if [ -z "$BINDIR" ]; then
-    BINDIR=$EPREFIX/bin
-fi
-if [ -z "$SBINDIR" ]; then
-    SBINDIR=$EPREFIX/sbin
-fi
-if [ -z "$LIBDIR" ]; then
-    LIBDIR=$EPREFIX/lib
-fi
-if [ -z "$LIBEXEC" ]; then
-    LIBEXECDIR=$EPREFIX/libexec
-fi
-if [ -z "$DATADIR" ]; then
-    DATADIR=$PREFIX/share
-fi
-if [ -z "$SYSCONFDIR" ]; then
-    SYSCONFDIR=$PREFIX/etc
-fi
-if [ -z "$SHAREDSTATEDIR" ]; then
-    SHAREDSTATEDIR=$PREFIX/com
-fi
-if [ -z "$LOCALSTATEDIR" ]; then
-    LOCALSTATEDIR=$PREFIX/var
-fi
-if [ -z "$INCLUDEDIR" ]; then
-    INCLUDEDIR=$PREFIX/include
-fi
-if [ -z "$INFODIR" ]; then
-    INFODIR=$PREFIX/info
-fi
-if [ -z "$MANDIR" ]; then
-    MANDIR=$PREFIX/man
+
+
+# set defaults for dir variables
+: ${exec_prefix:="$prefix"}
+: ${bindir:='${exec_prefix}/bin'}
+: ${sbindir:='${exec_prefix}/sbin'}
+: ${libdir:='${exec_prefix}/lib'}
+: ${libexecdir:='${exec_prefix}/libexec'}
+: ${datarootdir:='${prefix}/share'}
+: ${datadir:='${datarootdir}'}
+: ${sysconfdir:='${prefix}/etc'}
+: ${sharedstatedir:='${prefix}/com'}
+: ${localstatedir:='${prefix}/var'}
+: ${runstatedir:='${localstatedir}/run'}
+: ${includedir:='${prefix}/include'}
+: ${infodir:='${datarootdir}/info'}
+: ${mandir:='${datarootdir}/man'}
+: ${localedir:='${datarootdir}/locale'}
+
+# check if a config.site exists and load it
+if [ -n "$CONFIG_SITE" ]; then
+    # CONFIG_SITE may contain space separated file names
+    for cs in $CONFIG_SITE; do
+        printf "loading defaults from $cs... "
+        . "$cs"
+        echo ok
+    done
+elif [ -f "$prefix/share/config.site" ]; then
+    printf "loading site defaults... "
+    . "$prefix/share/config.site"
+    echo ok
+elif [ -f "$prefix/etc/config.site" ]; then
+    printf "loading site defaults... "
+    . "$prefix/etc/config.site"
+    echo ok
 fi
 
-which pkg-config > /dev/null
-if [ $? -eq 0 ]; then
-    PKG_CONFIG=pkg-config
-else
-    PKG_CONFIG=false
-fi
+# Test for availability of pkg-config
+PKG_CONFIG=`command -v pkg-config`
+: ${PKG_CONFIG:="false"}
 
 # Simple uname based platform detection
 # $PLATFORM is used for platform dependent dependency selection
+OS=`uname -s`
+OS_VERSION=`uname -r`
 printf "detect platform... "
 if [ "$OS" = "SunOS" ]; then
     PLATFORM="solaris sunos unix svr4"
-fi
-if [ "$OS" = "Linux" ]; then
+elif [ "$OS" = "Linux" ]; then
     PLATFORM="linux unix"
-fi
-if [ "$OS" = "FreeBSD" ]; then
+elif [ "$OS" = "FreeBSD" ]; then
     PLATFORM="freebsd bsd unix"
-fi
-if [ "$OS" = "Darwin" ]; then
+elif [ "$OS" = "OpenBSD" ]; then
+    PLATFORM="openbsd bsd unix"
+elif [ "$OS" = "NetBSD" ]; then
+    PLATFORM="netbsd bsd unix"
+elif [ "$OS" = "Darwin" ]; then
     PLATFORM="macos osx bsd unix"
-fi
-echo "$OS" | grep -i "MINGW" > /dev/null
-if [ $? -eq 0 ]; then
+elif echo "$OS" | grep -i "MINGW" > /dev/null; then
     PLATFORM="windows mingw"
 fi
-
-if [ -z "$PLATFORM" ]; then
-    PLATFORM="unix"
-fi
+: ${PLATFORM:="unix"}
 
-for p in $PLATFORM
-do
-    PLATFORM_NAME=$p
-    break
-done
-echo $PLATFORM_NAME
+PLATFORM_NAME=`echo "$PLATFORM" | cut -f1 -d' ' -`
+echo "$PLATFORM_NAME"
 
 isplatform()
 {
@@ -164,7 +177,7 @@
     done
     return 1
 }
-isnotplatform()
+notisplatform()
 {
     for p in $PLATFORM
     do
@@ -174,93 +187,121 @@
     done
     return 0
 }
-
-# generate config.mk and config.h
-cat > "$TEMP_DIR/config.mk" << __EOF__
-#
-# config.mk generated by configure
-#
-
-# general vars
-
-PREFIX=$PREFIX
-EPREFIX=$EPREFIX
+istoolchain()
+{
+    for t in $TOOLCHAIN
+    do
+        if [ "$t" = "$1" ]; then
+            return 0
+        fi
+    done
+    return 1
+}
+notistoolchain()
+{
+    for t in $TOOLCHAIN
+    do
+        if [ "$t" = "$1" ]; then
+            return 1
+        fi
+    done
+    return 0
+}
 
-BINDIR=$BINDIR
-SBINDIR=$SBINDIR
-LIBDIR=$LIBDIR
-LIBEXECDIR=$LIBEXECDIR
-DATADIR=$DATADIR
-SYSCONFDIR=$SYSCONFDIR
-SHAREDSTATEDIR=$SHAREDSTATEDIR
-LOCALSTATEDIR=$LOCALSTATEDIR
-INCLUDEDIR=$INCLUDEDIR
-INFODIR=$INFODIR
-MANDIR=$MANDIR
 
+# generate vars.mk
+cat > "$TEMP_DIR/vars.mk" << __EOF__
+prefix="$prefix"
+exec_prefix="$exec_prefix"
+bindir="$bindir"
+sbindir="$sbindir"
+libdir="$libdir"
+libexecdir="$libexecdir"
+datarootdir="$datarootdir"
+datadir="$datadir"
+sysconfdir="$sysconfdir"
+sharedstatedir="$sharedstatedir"
+localstatedir="$localstatedir"
+runstatedir="$runstatedir"
+includedir="$includedir"
+infodir="$infodir"
+mandir="$mandir"
+localedir="$localedir"
 __EOF__
 
-echo > "$TEMP_DIR/make.mk"
-
-ENV_CFLAGS=$CFLAGS
-ENV_LDFLAGS=$LDFLAGS
-ENV_CXXFLAGS=$CXXFLAGS
-
-# Toolchain detection
-# this will insert make vars to config.mk
+# toolchain detection utilities
 . make/toolchain.sh
 
-# add user specified flags to config.mk
-echo "# project specific flags" >> "$TEMP_DIR/config.mk"
-if [ -n "${ENV_CFLAGS}" ]; then
-    echo "CFLAGS += $ENV_CFLAGS" >> "$TEMP_DIR/config.mk"
-fi
-if [ -n "${ENV_CXXFLAGS}" ]; then
-    echo "CXXFLAGS += $ENV_CXXFLAGS" >> "$TEMP_DIR/config.mk"
-fi
-if [ -n "${ENV_LDFLAGS}" ]; then
-    echo "LDFLAGS += $ENV_LDFLAGS" >> "$TEMP_DIR/config.mk"
-fi
-
 #
 # DEPENDENCIES
 #
 
-dependency_curl()
+# check languages
+lang_c=
+lang_cpp=
+if detect_c_compiler ; then
+    lang_c=1
+fi
+
+# create buffer for make variables required by dependencies
+echo > "$TEMP_DIR/make.mk"
+
+test_pkg_config()
 {
-    printf "checking for curl... "
+    if "$PKG_CONFIG" --exists "$1" ; then :
+    else return 1 ; fi
+    if [ -z "$2" ] || "$PKG_CONFIG" --atleast-version="$2" "$1" ; then :
+    else return 1 ; fi
+    if [ -z "$3" ] || "$PKG_CONFIG" --exact-version="$3" "$1" ; then :
+    else return 1 ; fi
+    if [ -z "$4" ] || "$PKG_CONFIG" --max-version="$4" "$1" ; then :
+    else return 1 ; fi
+    return 0
+}
+
+print_check_msg()
+{
+    if [ -z "$1" ]; then
+        shift
+        printf "$@"
+    fi
+}
+
+dependency_error_curl()
+{
+    print_check_msg "$dep_checked_curl" "checking for curl... "
     # dependency curl platform="windows"
     while true
     do
-        if isnotplatform "windows"; then
+        if notisplatform "windows"; then
             break
         fi
         TEMP_CFLAGS="$TEMP_CFLAGS -I/mingw/include"
         TEMP_LDFLAGS="$TEMP_LDFLAGS -lcurl"
-        echo yes
-        return 0
+        print_check_msg "$dep_checked_curl" "yes\n"
+        dep_checked_curl=1
+        return 1
     done
 
     # dependency curl platform="macos"
     while true
     do
-        if isnotplatform "macos"; then
+        if notisplatform "macos"; then
             break
         fi
-        curl-config --cflags > /dev/null
-        if [ $? -eq 0 ]; then
-            TEMP_CFLAGS="$TEMP_CFLAGS `curl-config --cflags`"
+        if tmp_flags=`curl-config --cflags` ; then
+            TEMP_CFLAGS="$TEMP_CFLAGS $tmp_flags"
         else
             break
         fi
-        curl-config --ldflags > /dev/null
-        if [ $? -eq 0 ]; then
-            TEMP_LDFLAGS="$TEMP_LDFLAGS `curl-config --ldflags`"
+        if tmp_flags=`curl-config --ldflags` ; then
+            TEMP_LDFLAGS="$TEMP_LDFLAGS $tmp_flags"
         else
             break
         fi
-        echo yes
-        return 0
+        print_check_msg "$dep_checked_curl" "yes\n"
+        dep_checked_curl=1
+        return 1
     done
 
     # dependency curl
@@ -269,75 +310,79 @@
         if [ -z "$PKG_CONFIG" ]; then
             break
         fi
-        $PKG_CONFIG libcurl
-        if [ $? -ne 0 ] ; then
+        if test_pkg_config "libcurl" "" "" "" ; then
+            TEMP_CFLAGS="$TEMP_CFLAGS `"$PKG_CONFIG" --cflags libcurl`"
+            TEMP_LDFLAGS="$TEMP_LDFLAGS `"$PKG_CONFIG" --libs libcurl`"
+        else
             break
         fi
-        TEMP_CFLAGS="$TEMP_CFLAGS `$PKG_CONFIG --cflags libcurl`"
-        TEMP_LDFLAGS="$TEMP_LDFLAGS `$PKG_CONFIG --libs libcurl`"
-        echo yes
-        return 0
+        print_check_msg "$dep_checked_curl" "yes\n"
+        dep_checked_curl=1
+        return 1
     done
 
     # dependency curl
     while true
     do
-        curl-config --cflags > /dev/null
-        if [ $? -eq 0 ]; then
-            TEMP_CFLAGS="$TEMP_CFLAGS `curl-config --cflags`"
+        if tmp_flags=`curl-config --cflags` ; then
+            TEMP_CFLAGS="$TEMP_CFLAGS $tmp_flags"
         else
             break
         fi
-        curl-config --libs > /dev/null
-        if [ $? -eq 0 ]; then
-            TEMP_LDFLAGS="$TEMP_LDFLAGS `curl-config --libs`"
+        if tmp_flags=`curl-config --libs` ; then
+            TEMP_LDFLAGS="$TEMP_LDFLAGS $tmp_flags"
         else
             break
         fi
-        echo yes
-        return 0
+        print_check_msg "$dep_checked_curl" "yes\n"
+        dep_checked_curl=1
+        return 1
     done
 
-    echo no
-    return 1
+    print_check_msg "$dep_checked_curl" "no\n"
+    dep_checked_curl=1
+    return 0
 }
-dependency_openssl()
+dependency_error_openssl()
 {
-    printf "checking for openssl... "
+    print_check_msg "$dep_checked_openssl" "checking for openssl... "
     # dependency openssl platform="windows"
     while true
     do
-        if isnotplatform "windows"; then
+        if notisplatform "windows"; then
             break
         fi
         TEMP_LDFLAGS="$TEMP_LDFLAGS -lssl -lcrypto"
-        echo yes
-        return 0
+        print_check_msg "$dep_checked_openssl" "yes\n"
+        dep_checked_openssl=1
+        return 1
     done
 
     # dependency openssl platform="macos"
     while true
     do
-        if isnotplatform "macos"; then
+        if notisplatform "macos"; then
             break
         fi
         TEMP_LDFLAGS="$TEMP_LDFLAGS -framework CoreFoundation"
-        echo yes
-        return 0
+        print_check_msg "$dep_checked_openssl" "yes\n"
+        dep_checked_openssl=1
+        return 1
     done
 
     # dependency openssl platform="bsd"
     while true
     do
-        if isnotplatform "bsd"; then
+        if notisplatform "bsd"; then
             break
         fi
-        if isplatform "macos"; then
+        if isplatform "macos" || istoolchain "macos"; then
             break
         fi
         TEMP_LDFLAGS="$TEMP_LDFLAGS -lssl -lcrypto"
-        echo yes
-        return 0
+        print_check_msg "$dep_checked_openssl" "yes\n"
+        dep_checked_openssl=1
+        return 1
     done
 
     # dependency openssl
@@ -346,64 +391,64 @@
         if [ -z "$PKG_CONFIG" ]; then
             break
         fi
-        $PKG_CONFIG openssl
-        if [ $? -ne 0 ] ; then
+        if test_pkg_config "openssl" "" "" "" ; then
+            TEMP_CFLAGS="$TEMP_CFLAGS `"$PKG_CONFIG" --cflags openssl`"
+            TEMP_LDFLAGS="$TEMP_LDFLAGS `"$PKG_CONFIG" --libs openssl`"
+        else
             break
         fi
-        TEMP_CFLAGS="$TEMP_CFLAGS `$PKG_CONFIG --cflags openssl`"
-        TEMP_LDFLAGS="$TEMP_LDFLAGS `$PKG_CONFIG --libs openssl`"
-        echo yes
-        return 0
+        print_check_msg "$dep_checked_openssl" "yes\n"
+        dep_checked_openssl=1
+        return 1
     done
 
-    echo no
-    return 1
+    print_check_msg "$dep_checked_openssl" "no\n"
+    dep_checked_openssl=1
+    return 0
 }
-dependency_libxml2()
+dependency_error_libxml2()
 {
-    printf "checking for libxml2... "
+    print_check_msg "$dep_checked_libxml2" "checking for libxml2... "
     # dependency libxml2 platform="windows"
     while true
     do
-        if isnotplatform "windows"; then
+        if notisplatform "windows"; then
             break
         fi
-        xml2-config --cflags > /dev/null
-        if [ $? -eq 0 ]; then
-            TEMP_CFLAGS="$TEMP_CFLAGS `xml2-config --cflags`"
+        if tmp_flags=`xml2-config --cflags` ; then
+            TEMP_CFLAGS="$TEMP_CFLAGS $tmp_flags"
         else
             break
         fi
-        xml2-config --libs > /dev/null
-        if [ $? -eq 0 ]; then
-            TEMP_LDFLAGS="$TEMP_LDFLAGS `xml2-config --libs`"
+        if tmp_flags=`xml2-config --libs` ; then
+            TEMP_LDFLAGS="$TEMP_LDFLAGS $tmp_flags"
         else
             break
         fi
-        echo yes
-        return 0
+        print_check_msg "$dep_checked_libxml2" "yes\n"
+        dep_checked_libxml2=1
+        return 1
     done
 
     # dependency libxml2 platform="macos"
     while true
     do
-        if isnotplatform "macos"; then
+        if notisplatform "macos"; then
             break
         fi
-        xml2-config --cflags > /dev/null
-        if [ $? -eq 0 ]; then
-            TEMP_CFLAGS="$TEMP_CFLAGS `xml2-config --cflags`"
+        if tmp_flags=`xml2-config --cflags` ; then
+            TEMP_CFLAGS="$TEMP_CFLAGS $tmp_flags"
         else
             break
         fi
-        xml2-config --libs > /dev/null
-        if [ $? -eq 0 ]; then
-            TEMP_LDFLAGS="$TEMP_LDFLAGS `xml2-config --libs`"
+        if tmp_flags=`xml2-config --libs` ; then
+            TEMP_LDFLAGS="$TEMP_LDFLAGS $tmp_flags"
         else
             break
         fi
-        echo yes
-        return 0
+        print_check_msg "$dep_checked_libxml2" "yes\n"
+        dep_checked_libxml2=1
+        return 1
     done
 
     # dependency libxml2
@@ -412,62 +457,69 @@
         if [ -z "$PKG_CONFIG" ]; then
             break
         fi
-        $PKG_CONFIG libxml-2.0
-        if [ $? -ne 0 ] ; then
+        if test_pkg_config "libxml-2.0" "" "" "" ; then
+            TEMP_CFLAGS="$TEMP_CFLAGS `"$PKG_CONFIG" --cflags libxml-2.0`"
+            TEMP_LDFLAGS="$TEMP_LDFLAGS `"$PKG_CONFIG" --libs libxml-2.0`"
+        else
             break
         fi
-        TEMP_CFLAGS="$TEMP_CFLAGS `$PKG_CONFIG --cflags libxml-2.0`"
-        TEMP_LDFLAGS="$TEMP_LDFLAGS `$PKG_CONFIG --libs libxml-2.0`"
-        echo yes
-        return 0
+        print_check_msg "$dep_checked_libxml2" "yes\n"
+        dep_checked_libxml2=1
+        return 1
     done
 
     # dependency libxml2
     while true
     do
-        xml2-config --cflags > /dev/null
-        if [ $? -eq 0 ]; then
-            TEMP_CFLAGS="$TEMP_CFLAGS `xml2-config --cflags`"
+        if tmp_flags=`xml2-config --cflags` ; then
+            TEMP_CFLAGS="$TEMP_CFLAGS $tmp_flags"
         else
             break
         fi
-        xml2-config --libs > /dev/null
-        if [ $? -eq 0 ]; then
-            TEMP_LDFLAGS="$TEMP_LDFLAGS `xml2-config --libs`"
+        if tmp_flags=`xml2-config --libs` ; then
+            TEMP_LDFLAGS="$TEMP_LDFLAGS $tmp_flags"
         else
             break
         fi
-        echo yes
-        return 0
+        print_check_msg "$dep_checked_libxml2" "yes\n"
+        dep_checked_libxml2=1
+        return 1
     done
 
-    echo no
-    return 1
+    print_check_msg "$dep_checked_libxml2" "no\n"
+    dep_checked_libxml2=1
+    return 0
 }
 
+# start collecting dependency information
+echo > "$TEMP_DIR/flags.mk"
+
 DEPENDENCIES_FAILED=
 ERROR=0
-# general dependencies
+# unnamed dependencies
 TEMP_CFLAGS=
+TEMP_CXXFLAGS=
 TEMP_LDFLAGS=
 while true
 do
     while true
     do
+        if [ -z "$lang_c" ] ; then
+            ERROR=1
+            break
+        fi
 
         TEMP_LDFLAGS="$TEMP_LDFLAGS -lm -lpthread"
-
         break
     done
-
     break
 done
 while true
 do
-    if isnotplatform "bsd"; then
+    if notisplatform "bsd"; then
         break
     fi
-    if isplatform "macos"; then
+    if isplatform "macos" || istoolchain "macos"; then
         break
     fi
     while true
@@ -475,15 +527,13 @@
 
         TEMP_CFLAGS="$TEMP_CFLAGS -I/usr/local/include"
         TEMP_LDFLAGS="$TEMP_LDFLAGS -L/usr/local/lib"
-
         break
     done
-
     break
 done
 while true
 do
-    if isnotplatform "macos"; then
+    if notisplatform "macos"; then
         break
     fi
     while true
@@ -494,18 +544,16 @@
 LIB_EXT = .a
 
 __EOF__
-
         break
     done
-
     break
 done
 while true
 do
-    if isnotplatform "unix"; then
+    if notisplatform "unix"; then
         break
     fi
-    if isplatform "macos"; then
+    if isplatform "macos" || istoolchain "macos"; then
         break
     fi
     while true
@@ -516,23 +564,21 @@
 LIB_EXT = .a
 
 __EOF__
-
         break
     done
-
     break
 done
 
-# add general dependency flags to config.mk
-echo >> "$TEMP_DIR/config.mk"
-if [ -n "${TEMP_CFLAGS}" ]; then
-    echo "CFLAGS += $TEMP_CFLAGS" >> $TEMP_DIR/config.mk
+# add general dependency flags to flags.mk
+echo "# general flags" >> "$TEMP_DIR/flags.mk"
+if [ -n "${TEMP_CFLAGS}" ] && [ -n "$lang_c" ]; then
+    echo "CFLAGS += $TEMP_CFLAGS" >> "$TEMP_DIR/flags.mk"
 fi
-if [ -n "${TEMP_CXXFLAGS}" ]; then
-    echo "CXXFLAGS += $TEMP_CXXFLAGS" >> $TEMP_DIR/config.mk
+if [ -n "${TEMP_CXXFLAGS}" ] && [ -n "$lang_cpp" ]; then
+    echo "CXXFLAGS += $TEMP_CXXFLAGS" >> "$TEMP_DIR/flags.mk"
 fi
 if [ -n "${TEMP_LDFLAGS}" ]; then
-    echo "LDFLAGS += $TEMP_LDFLAGS" >> $TEMP_DIR/config.mk
+    echo "LDFLAGS += $TEMP_LDFLAGS" >> "$TEMP_DIR/flags.mk"
 fi
 
 #
@@ -542,27 +588,23 @@
 #
 # TARGETS
 #
+
+echo >> "$TEMP_DIR/flags.mk"
+echo "configuring target: dav"
+echo "# flags for target dav" >> "$TEMP_DIR/flags.mk"
 TEMP_CFLAGS=
 TEMP_CXXFLAGS=
 TEMP_LDFLAGS=
 
-# Target: dav
-TEMP_CFLAGS=
-TEMP_LDFLAGS=
-TEMP_CXXFLAGS=
-
-dependency_curl
-if [ $? -ne 0 ]; then
+if dependency_error_curl; then
     DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED curl "
     ERROR=1
 fi
-dependency_libxml2
-if [ $? -ne 0 ]; then
+if dependency_error_libxml2; then
     DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED libxml2 "
     ERROR=1
 fi
-dependency_openssl
-if [ $? -ne 0 ]; then
+if dependency_error_openssl; then
     DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED openssl "
     ERROR=1
 fi
@@ -570,32 +612,55 @@
 # Features
 
 
-echo >> "$TEMP_DIR/config.mk"
-if [ -n "${TEMP_CFLAGS}" ]; then
-    echo "DAV_CFLAGS  += $TEMP_CFLAGS" >> "$TEMP_DIR/config.mk"
+if [ -n "${TEMP_CFLAGS}" ] && [ -n "$lang_c" ]; then
+    echo "DAV_CFLAGS  += $TEMP_CFLAGS" >> "$TEMP_DIR/flags.mk"
+fi
+if [ -n "${TEMP_CXXFLAGS}" ] && [ -n "$lang_cpp" ]; then
+    echo "DAV_CXXFLAGS  += $TEMP_CXXFLAGS" >> "$TEMP_DIR/flags.mk"
 fi
-if [ -n "${TEMP_CXXFLAGS}" ]; then
-    echo "DAV_CXXFLAGS += $TEMP_CXXFLAGS" >> "$TEMP_DIR/config.mk"
+if [ "$BUILD_TYPE" = "debug" ]; then
+    if [ -n "$lang_c" ]; then
+        echo 'DAV_CFLAGS += ${DEBUG_CC_FLAGS}' >> "$TEMP_DIR/flags.mk"
+    fi
+    if [ -n "$lang_cpp" ]; then
+        echo 'DAV_CXXFLAGS += ${DEBUG_CXX_FLAGS}' >> "$TEMP_DIR/flags.mk"
+    fi
+fi
+if [ "$BUILD_TYPE" = "release" ]; then
+    if [ -n "$lang_c" ]; then
+        echo 'DAV_CFLAGS += ${RELEASE_CC_FLAGS}' >> "$TEMP_DIR/flags.mk"
+    fi
+    if [ -n "$lang_cpp" ]; then
+        echo 'DAV_CXXFLAGS += ${RELEASE_CXX_FLAGS}' >> "$TEMP_DIR/flags.mk"
+    fi
 fi
 if [ -n "${TEMP_LDFLAGS}" ]; then
-    echo "DAV_LDFLAGS += $TEMP_LDFLAGS" >> "$TEMP_DIR/config.mk"
+    echo "DAV_LDFLAGS += $TEMP_LDFLAGS" >> "$TEMP_DIR/flags.mk"
 fi
 
+
+# final result
 if [ $ERROR -ne 0 ]; then
     echo
     echo "Error: Unresolved dependencies"
     echo "$DEPENDENCIES_FAILED"
-    rm -Rf "$TEMP_DIR"
-    exit 1
+    abort_configure
 fi
 
 echo "configure finished"
 echo
 echo "Build Config:"
-echo "  PREFIX:    $PREFIX"
-echo "  TOOLCHAIN: $TOOLCHAIN_NAME"
+echo "  PREFIX:      $prefix"
+echo "  TOOLCHAIN:   $TOOLCHAIN_NAME"
 echo
-cat "$TEMP_DIR/config.mk" "$TEMP_DIR/make.mk" > config.mk
+
+# generate the config.mk file
+cat > "$TEMP_DIR/config.mk" << __EOF__
+#
+# config.mk generated by configure
+#
+
+__EOF__
+write_toolchain_defaults "$TEMP_DIR/toolchain.mk"
+cat "$TEMP_DIR/vars.mk" "$TEMP_DIR/toolchain.mk" "$TEMP_DIR/flags.mk" "$TEMP_DIR/make.mk" > config.mk
 rm -Rf "$TEMP_DIR"
-
-
diff -r ce97ff16f00e -r 16e5b9d32754 dav/Makefile
--- a/dav/Makefile	Sun Jan 28 12:39:08 2024 +0100
+++ b/dav/Makefile	Sun Jan 28 13:10:18 2024 +0100
@@ -26,8 +26,6 @@
 # POSSIBILITY OF SUCH DAMAGE.
 #
 
-BUILD_ROOT = ..
-
 include ../config.mk
 
 DAV_SRC  = main.c
@@ -68,17 +66,17 @@
 all: ../build/bin/dav ../build/bin/dav-sync ../build/bin/xattrtool
 
 $(DAV_BIN): $(DAV_OBJ) ../build/lib/libidav$(LIB_EXT)
-	$(LD) -o $(DAV_BIN) $(DAV_OBJ) \
+	$(CC) -o $(DAV_BIN) $(DAV_OBJ) \
 		../build/lib/libidav$(LIB_EXT) ../build/lib/libucx$(LIB_EXT)  \
 		$(LDFLAGS) $(DAV_LDFLAGS)
 
 $(DAV_SYNC_BIN): $(SYNC_OBJ) ../build/lib/libidav$(LIB_EXT)
-	$(LD) -o $(DAV_SYNC_BIN) $(SYNC_OBJ) \
+	$(CC) -o $(DAV_SYNC_BIN) $(SYNC_OBJ) \
 		../build/lib/libidav$(LIB_EXT) ../build/lib/libucx$(LIB_EXT)  \
 		$(LDFLAGS) $(DAV_LDFLAGS)
 
 $(XATTRTOOL_BIN): $(XATTR_OBJ)
-	$(LD) -o $(XATTRTOOL_BIN) $(XATTR_OBJ) $(LDFLAGS)
+	$(CC) -o $(XATTRTOOL_BIN) $(XATTR_OBJ) $(LDFLAGS)
 
 ../build/tool/%$(OBJ_EXT): %.c 
 	$(CC) -I../ucx -I../ $(CFLAGS) $(DAV_CFLAGS) -c -o $@ $<
diff -r ce97ff16f00e -r 16e5b9d32754 libidav/Makefile
--- a/libidav/Makefile	Sun Jan 28 12:39:08 2024 +0100
+++ b/libidav/Makefile	Sun Jan 28 13:10:18 2024 +0100
@@ -26,8 +26,6 @@
 # POSSIBILITY OF SUCH DAMAGE.
 #
 
-BUILD_ROOT = ..
-
 include ../config.mk
 
 # list of source files
diff -r ce97ff16f00e -r 16e5b9d32754 make/Makefile
--- a/make/Makefile	Sun Jan 28 12:39:08 2024 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,94 +0,0 @@
-#
-# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
-#
-# Copyright 2018 Olaf Wintermann. All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are met:
-#
-#   1. Redistributions of source code must retain the above copyright
-#      notice, this list of conditions and the following disclaimer.
-#
-#   2. Redistributions in binary form must reproduce the above copyright
-#      notice, this list of conditions and the following disclaimer in the
-#      documentation and/or other materials provided with the distribution.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
-# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-# POSSIBILITY OF SUCH DAMAGE.
-#
-
-
-#
-# available configurations:
-#   gcc
-#   clang
-#   suncc
-#   mingw
-#   osx
-#   bsd
-#
-
-CONF=gcc
-PREFIX=/usr
-
-include $(CONF).mk
-include cppcheck.mk
-
-all: build/tool build/ucx build/libidav build/test ucx libidav dav test
-
-build:
-	mkdir -p build
-
-build/tool:
-	mkdir -p build/tool
-
-build/ucx:
-	mkdir -p build/ucx
-
-build/libidav:
-	mkdir -p build/libidav
-
-build/test:
-	mkdir -p build/test
-
-ucx: FORCE
-	cd ucx; $(MAKE) CONF=$(CONF) all
-
-libidav: FORCE
-	cd libidav; $(MAKE) CONF=$(CONF) all
-	
-dav: FORCE libidav ucx
-	cd dav; $(MAKE) CONF=$(CONF) all
-
-test: FORCE dav
-	cd test; $(MAKE) CONF=$(CONF) all
-
-run: FORCE dav
-	./build/dav$(APP_EXT)
-
-clean: FORCE
-	$(RM) $(RMFLAGS) -R build/
-
-install: FORCE
-	@echo "install to $(DESTDIR)$(PREFIX)"
-	./install-sh -d $(DESTDIR)$(PREFIX)/bin
-	./install-sh build/dav $(DESTDIR)$(PREFIX)/bin
-	./install-sh build/dav-sync $(DESTDIR)$(PREFIX)/bin
-
-cppcheck: FORCE build
-	truncate -s0 $(CPPCHECK_LOG)
-	cd libidav; $(MAKE) cppcheck
-	cd dav; $(MAKE) cppcheck
-	@echo "Static code analysis complete. See $(CPPCHECK_LOG) for the results."
-
-FORCE:
-
diff -r ce97ff16f00e -r 16e5b9d32754 make/cc.mk
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/make/cc.mk	Sun Jan 28 13:10:18 2024 +0100
@@ -0,0 +1,11 @@
+#
+# cc toolchain config
+#
+
+CFLAGS =
+DEBUG_CC_FLAGS = -g
+RELEASE_CC_FLAGS = -O3 -DNDEBUG
+LDFLAGS =
+
+SHLIB_CFLAGS = -fPIC
+SHLIB_LDFLAGS = -shared
\ No newline at end of file
diff -r ce97ff16f00e -r 16e5b9d32754 make/clang.mk
--- a/make/clang.mk	Sun Jan 28 12:39:08 2024 +0100
+++ b/make/clang.mk	Sun Jan 28 13:10:18 2024 +0100
@@ -2,8 +2,10 @@
 # clang toolchain config
 #
 
-CFLAGS = -g
-LDFLAGS = 
+CFLAGS =
+DEBUG_CC_FLAGS = -g
+RELEASE_CC_FLAGS = -O3 -DNDEBUG
+LDFLAGS =
 
 SHLIB_CFLAGS = -fPIC
 SHLIB_LDFLAGS = -shared
diff -r ce97ff16f00e -r 16e5b9d32754 make/configure.vm
--- a/make/configure.vm	Sun Jan 28 12:39:08 2024 +0100
+++ b/make/configure.vm	Sun Jan 28 13:10:18 2024 +0100
@@ -1,72 +1,59 @@
 #!/bin/sh
 
+# create temporary directory
+TEMP_DIR=".tmp-`uname -n`"
+rm -Rf "$TEMP_DIR"
+if mkdir -p "$TEMP_DIR"; then
+    :
+else
+    echo "Cannot create tmp dir $TEMP_DIR"
+    echo "Abort"
+    exit 1
+fi
+touch "$TEMP_DIR/options"
+touch "$TEMP_DIR/features"
+
+# define standard variables
+# also define standard prefix (this is where we will search for config.site)
+prefix=/usr
+exec_prefix=
+bindir=
+sbindir=
+libdir=
+libexecdir=
+datarootdir=
+datadir=
+sysconfdir=
+sharedstatedir=
+localstatedir=
+runstatedir=
+includedir=
+infodir=
+localedir=
+mandir=
+
+# custom variables
 #foreach( $var in $vars )
 #if( $var.exec )
 ${var.varName}=`${var.value}`
 #else
-${var.varName}=${var.value}
+${var.varName}="${var.value}"
 #end
 #end
 
-#if ( ! $project.hasVar("PREFIX") )
-PREFIX=/usr
+# features
+#foreach( $feature in $features )
+#if( ${feature.auto} )
+${feature.varName}=auto
 #end
-#if ( ! $project.hasVar("EPREFIX") )
-EPREFIX=$PREFIX
 #end
 
-#if ( ! $project.hasVar("BINDIR") )
-BINDIR=
-#end
-#if ( ! $project.hasVar("SBINDIR") )
-SBINDIR=
-#end
-#if ( ! $project.hasVar("LIBDIR") )
-LIBDIR=
-#end
-#if ( ! $project.hasVar("LIBEXECDIR") )
-LIBEXECDIR=
-#end
-#if ( ! $project.hasVar("DATADIR") )
-DATADIR=
-#end
-#if ( ! $project.hasVar("SYSCONFDIR") )
-SYSCONFDIR=
-#end
-#if ( ! $project.hasVar("SHAREDSTATEDIR") )
-SHAREDSTATEDIR=
-#end
-#if ( ! $project.hasVar("LOCALSTATEDIR") )
-LOCALSTATEDIR=
-#end
-#if ( ! $project.hasVar("INCLUDEDIR") )
-INCLUDEDIR=
-#end
-#if ( ! $project.hasVar("INFODIR") )
-INFODIR=
-#end
-#if ( ! $project.hasVar("MANDIR") )
-MANDIR=
-#end
-
-OS=`uname -s`
-OS_VERSION=`uname -r`
-
-TEMP_DIR=".tmp-`uname -n`"
-mkdir -p "$TEMP_DIR"
-if [ $? -ne 0 ]; then
-    echo "Cannot create tmp dir"
-    echo "Abort"
-fi
-touch "$TEMP_DIR/options"
-touch "$TEMP_DIR/features"
-
-# features
-#foreach( $feature in $features )
-#if( ${feature.isDefault()} )
-${feature.getVarName()}=on
-#end
-#end
+# clean abort
+abort_configure()
+{
+    rm -Rf "$TEMP_DIR"
+    exit 1
+}
 
 # help text
 printhelp()
@@ -85,28 +72,28 @@
   --sysconfdir=DIR        system configuration files [PREFIX/etc]
   --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
   --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
+  --runstatedir=DIR       run-time variable data [LOCALSTATEDIR/run]
   --libdir=DIR            object code libraries [EPREFIX/lib]
   --includedir=DIR        C header files [PREFIX/include]
   --datarootdir=DIR       read-only arch.-independent data root [PREFIX/share]
   --datadir=DIR           read-only architecture-independent data [DATAROOTDIR]
   --infodir=DIR           info documentation [DATAROOTDIR/info]
   --mandir=DIR            man documentation [DATAROOTDIR/man]
+  --localedir=DIR         locale-dependent data [DATAROOTDIR/locale]
 
 #if( $options.size() > 0 )
 Options:
+  --debug                 add extra compile flags for debug builds
+  --release               add extra compile flags for release builds
 #foreach( $opt in $options )
-  --${opt.getArgument()}=${opt.getValuesString()}
+  --${opt.argument}=${opt.valuesString}
 #end
 
 #end
 #if( $features.size() > 0 )
 Optional Features:
 #foreach( $feature in $features )
-#if( $feature.default )
-  --disable-${feature.arg}
-#else
-  --enable-${feature.arg}
-#end
+${feature.helpText}
 #end
 
 #end
@@ -116,107 +103,106 @@
 #
 # parse arguments
 #
+BUILD_TYPE="default"
 #set( $D = '$' )
 for ARG in "$@"
 do
     case "$ARG" in
-        "--prefix="*)         PREFIX=${D}{ARG#--prefix=} ;;
-        "--exec-prefix="*)    EPREFIX=${D}{ARG#--exec-prefix=} ;;
-        "--bindir="*)         BINDIR=${D}{ARG#----bindir=} ;;
-        "--sbindir="*)        SBINDIR=${D}{ARG#--sbindir=} ;;
-        "--libdir="*)         LIBDIR=${D}{ARG#--libdir=} ;;
-        "--libexecdir="*)     LIBEXECDIR=${D}{ARG#--libexecdir=} ;;
-        "--datadir="*)        DATADIR=${D}{ARG#--datadir=} ;;
-        "--sysconfdir="*)     SYSCONFDIR=${D}{ARG#--sysconfdir=} ;;
-        "--sharedstatedir="*) SHAREDSTATEDIR=${D}{ARG#--sharedstatedir=} ;;
-        "--localstatedir="*)  LOCALSTATEDIR=${D}{ARG#--localstatedir=} ;;
-        "--includedir="*)     INCLUDEDIR=${D}{ARG#--includedir=} ;;
-        "--infodir="*)        INFODIR=${D}{ARG#--infodir=} ;;
-        "--mandir"*)          MANDIR=${D}{ARG#--mandir} ;;
-        "--help"*) printhelp; rm -Rf "$TEMP_DIR"; exit 1 ;;
+        "--prefix="*)         prefix=${D}{ARG#--prefix=} ;;
+        "--exec-prefix="*)    exec_prefix=${D}{ARG#--exec-prefix=} ;;
+        "--bindir="*)         bindir=${D}{ARG#----bindir=} ;;
+        "--sbindir="*)        sbindir=${D}{ARG#--sbindir=} ;;
+        "--libdir="*)         libdir=${D}{ARG#--libdir=} ;;
+        "--libexecdir="*)     libexecdir=${D}{ARG#--libexecdir=} ;;
+        "--datarootdir="*)    datarootdir=${D}{ARG#--datarootdir=} ;;
+        "--datadir="*)        datadir=${D}{ARG#--datadir=} ;;
+        "--sysconfdir="*)     sysconfdir=${D}{ARG#--sysconfdir=} ;;
+        "--sharedstatedir="*) sharedstatedir=${D}{ARG#--sharedstatedir=} ;;
+        "--localstatedir="*)  localstatedir=${D}{ARG#--localstatedir=} ;;
+        "--includedir="*)     includedir=${D}{ARG#--includedir=} ;;
+        "--infodir="*)        infodir=${D}{ARG#--infodir=} ;;
+        "--mandir"*)          mandir=${D}{ARG#--mandir} ;;
+        "--localedir"*)       localedir=${D}{ARG#--localedir} ;;
+        "--help"*) printhelp; abort_configure ;;
+        "--debug")           BUILD_TYPE="debug" ;;
+        "--release")         BUILD_TYPE="release" ;;
     #foreach( $opt in $options )
-        "--${opt.getArgument()}="*) ${opt.getVarName()}=${D}{ARG#--${opt.getArgument()}=} ;;
+        "--${opt.argument}="*) ${opt.varName}=${D}{ARG#--${opt.argument}=} ;;
     #end
     #foreach( $feature in $features )
-        "--enable-${feature.arg}") ${feature.getVarName()}=on ;;
-        "--disable-${feature.arg}") unset ${feature.getVarName()} ;;
+        "--enable-${feature.arg}") ${feature.varName}=on ;;
+        "--disable-${feature.arg}") unset ${feature.varName} ;;
     #end
-        "-"*) echo "unknown option: $ARG"; rm -Rf "$TEMP_DIR"; exit 1 ;;
+        "-"*) echo "unknown option: $ARG"; abort_configure ;;
     esac
 done
 
-# set dir variables
-if [ -z "$BINDIR" ]; then
-    BINDIR=$EPREFIX/bin
-fi
-if [ -z "$SBINDIR" ]; then
-    SBINDIR=$EPREFIX/sbin
-fi
-if [ -z "$LIBDIR" ]; then
-    LIBDIR=$EPREFIX/lib
-fi
-if [ -z "$LIBEXEC" ]; then
-    LIBEXECDIR=$EPREFIX/libexec
-fi
-if [ -z "$DATADIR" ]; then
-    DATADIR=$PREFIX/share
-fi
-if [ -z "$SYSCONFDIR" ]; then
-    SYSCONFDIR=$PREFIX/etc
-fi
-if [ -z "$SHAREDSTATEDIR" ]; then
-    SHAREDSTATEDIR=$PREFIX/com
-fi
-if [ -z "$LOCALSTATEDIR" ]; then
-    LOCALSTATEDIR=$PREFIX/var
-fi
-if [ -z "$INCLUDEDIR" ]; then
-    INCLUDEDIR=$PREFIX/include
-fi
-if [ -z "$INFODIR" ]; then
-    INFODIR=$PREFIX/info
-fi
-if [ -z "$MANDIR" ]; then
-    MANDIR=$PREFIX/man
+## Begin unparsed content. **
+#[[
+
+# set defaults for dir variables
+: ${exec_prefix:="$prefix"}
+: ${bindir:='${exec_prefix}/bin'}
+: ${sbindir:='${exec_prefix}/sbin'}
+: ${libdir:='${exec_prefix}/lib'}
+: ${libexecdir:='${exec_prefix}/libexec'}
+: ${datarootdir:='${prefix}/share'}
+: ${datadir:='${datarootdir}'}
+: ${sysconfdir:='${prefix}/etc'}
+: ${sharedstatedir:='${prefix}/com'}
+: ${localstatedir:='${prefix}/var'}
+: ${runstatedir:='${localstatedir}/run'}
+: ${includedir:='${prefix}/include'}
+: ${infodir:='${datarootdir}/info'}
+: ${mandir:='${datarootdir}/man'}
+: ${localedir:='${datarootdir}/locale'}
+
+# check if a config.site exists and load it
+if [ -n "$CONFIG_SITE" ]; then
+    # CONFIG_SITE may contain space separated file names
+    for cs in $CONFIG_SITE; do
+        printf "loading defaults from $cs... "
+        . "$cs"
+        echo ok
+    done
+elif [ -f "$prefix/share/config.site" ]; then
+    printf "loading site defaults... "
+    . "$prefix/share/config.site"
+    echo ok
+elif [ -f "$prefix/etc/config.site" ]; then
+    printf "loading site defaults... "
+    . "$prefix/etc/config.site"
+    echo ok
 fi
 
-which pkg-config > /dev/null
-if [ $? -eq 0 ]; then
-    PKG_CONFIG=pkg-config
-else
-    PKG_CONFIG=false
-fi
+# Test for availability of pkg-config
+PKG_CONFIG=`command -v pkg-config`
+: ${PKG_CONFIG:="false"}
 
 # Simple uname based platform detection
 # $PLATFORM is used for platform dependent dependency selection
+OS=`uname -s`
+OS_VERSION=`uname -r`
 printf "detect platform... "
 if [ "$OS" = "SunOS" ]; then
     PLATFORM="solaris sunos unix svr4"
-fi
-if [ "$OS" = "Linux" ]; then
+elif [ "$OS" = "Linux" ]; then
     PLATFORM="linux unix"
-fi
-if [ "$OS" = "FreeBSD" ]; then
+elif [ "$OS" = "FreeBSD" ]; then
     PLATFORM="freebsd bsd unix"
-fi
-if [ "$OS" = "Darwin" ]; then
+elif [ "$OS" = "OpenBSD" ]; then
+    PLATFORM="openbsd bsd unix"
+elif [ "$OS" = "NetBSD" ]; then
+    PLATFORM="netbsd bsd unix"
+elif [ "$OS" = "Darwin" ]; then
     PLATFORM="macos osx bsd unix"
-fi
-echo "$OS" | grep -i "MINGW" > /dev/null
-if [ $? -eq 0 ]; then
+elif echo "$OS" | grep -i "MINGW" > /dev/null; then
     PLATFORM="windows mingw"
 fi
-
-if [ -z "$PLATFORM" ]; then
-    PLATFORM="unix"
-fi
+: ${PLATFORM:="unix"}
 
-for p in $PLATFORM
-do
-    PLATFORM_NAME=$p
-    break
-done
-echo $PLATFORM_NAME
+PLATFORM_NAME=`echo "$PLATFORM" | cut -f1 -d' ' -`
+echo "$PLATFORM_NAME"
 
 isplatform()
 {
@@ -228,7 +214,7 @@
     done
     return 1
 }
-isnotplatform()
+notisplatform()
 {
     for p in $PLATFORM
     do
@@ -238,102 +224,117 @@
     done
     return 0
 }
-
-# generate config.mk and config.h
-cat > "$TEMP_DIR/config.mk" << __EOF__
-#
-# config.mk generated by configure
-#
-
-# general vars
-#foreach( $var in $vars )
-${var.varName}=$${var.varName}
-#end
+istoolchain()
+{
+    for t in $TOOLCHAIN
+    do
+        if [ "$t" = "$1" ]; then
+            return 0
+        fi
+    done
+    return 1
+}
+notistoolchain()
+{
+    for t in $TOOLCHAIN
+    do
+        if [ "$t" = "$1" ]; then
+            return 1
+        fi
+    done
+    return 0
+}
+]]#
+## End of unparsed content **
 
-#if ( ! $project.hasVar("PREFIX") )
-PREFIX=$PREFIX
-#end
-#if ( ! $project.hasVar("EPREFIX") )
-EPREFIX=$EPREFIX
-#end
-
-#if ( ! $project.hasVar("BINDIR") )
-BINDIR=$BINDIR
-#end
-#if ( ! $project.hasVar("SBINDIR") )
-SBINDIR=$SBINDIR
+# generate vars.mk
+cat > "$TEMP_DIR/vars.mk" << __EOF__
+prefix="$prefix"
+exec_prefix="$exec_prefix"
+bindir="$bindir"
+sbindir="$sbindir"
+libdir="$libdir"
+libexecdir="$libexecdir"
+datarootdir="$datarootdir"
+datadir="$datadir"
+sysconfdir="$sysconfdir"
+sharedstatedir="$sharedstatedir"
+localstatedir="$localstatedir"
+runstatedir="$runstatedir"
+includedir="$includedir"
+infodir="$infodir"
+mandir="$mandir"
+localedir="$localedir"
+#foreach( $var in $vars )
+${var.varName}="${D}${var.varName}"
 #end
-#if ( ! $project.hasVar("LIBDIR") )
-LIBDIR=$LIBDIR
-#end
-#if ( ! $project.hasVar("LIBEXECDIR") )
-LIBEXECDIR=$LIBEXECDIR
-#end
-#if ( ! $project.hasVar("DATADIR") )
-DATADIR=$DATADIR
-#end
-#if ( ! $project.hasVar("SYSCONFDIR") )
-SYSCONFDIR=$SYSCONFDIR
-#end
-#if ( ! $project.hasVar("SHAREDSTATEDIR") )
-SHAREDSTATEDIR=$SHAREDSTATEDIR
-#end
-#if ( ! $project.hasVar("LOCALSTATEDIR") )
-LOCALSTATEDIR=$LOCALSTATEDIR
-#end
-#if ( ! $project.hasVar("INCLUDEDIR") )
-INCLUDEDIR=$INCLUDEDIR
-#end
-#if ( ! $project.hasVar("INFODIR") )
-INFODIR=$INFODIR
-#end
-#if ( ! $project.hasVar("MANDIR") )
-MANDIR=$MANDIR
-#end
-
 __EOF__
 
-echo > "$TEMP_DIR/make.mk"
-
-ENV_CFLAGS=$CFLAGS
-ENV_LDFLAGS=$LDFLAGS
-ENV_CXXFLAGS=$CXXFLAGS
-
-# Toolchain detection
-# this will insert make vars to config.mk
+# toolchain detection utilities
 . make/toolchain.sh
 
-# add user specified flags to config.mk
-echo "# project specific flags" >> "$TEMP_DIR/config.mk"
-if [ -n "${ENV_CFLAGS}" ]; then
-    echo "CFLAGS += $ENV_CFLAGS" >> "$TEMP_DIR/config.mk"
-fi
-if [ -n "${ENV_CXXFLAGS}" ]; then
-    echo "CXXFLAGS += $ENV_CXXFLAGS" >> "$TEMP_DIR/config.mk"
-fi
-if [ -n "${ENV_LDFLAGS}" ]; then
-    echo "LDFLAGS += $ENV_LDFLAGS" >> "$TEMP_DIR/config.mk"
-fi
-
 #
 # DEPENDENCIES
 #
 
-#foreach( $dependency in $namedDependencies )
-dependency_${dependency.name}()
+# check languages
+lang_c=
+lang_cpp=
+#foreach( $lang in $languages )
+if detect_${lang}_compiler ; then
+    lang_${lang}=1
+fi
+#end
+
+# create buffer for make variables required by dependencies
+echo > "$TEMP_DIR/make.mk"
+
+test_pkg_config()
 {
-    printf "checking for ${dependency.name}... "
-    #foreach( $sub in $dependency.getSubdependencies() )
-    # dependency $sub.getFullName()
+    if "$PKG_CONFIG" --exists "$1" ; then :
+    else return 1 ; fi
+    if [ -z "$2" ] || "$PKG_CONFIG" --atleast-version="$2" "$1" ; then :
+    else return 1 ; fi
+    if [ -z "$3" ] || "$PKG_CONFIG" --exact-version="$3" "$1" ; then :
+    else return 1 ; fi
+    if [ -z "$4" ] || "$PKG_CONFIG" --max-version="$4" "$1" ; then :
+    else return 1 ; fi
+    return 0
+}
+
+print_check_msg()
+{
+    if [ -z "$1" ]; then
+        shift
+        printf "$@"
+    fi
+}
+
+#foreach( $dependency in $namedDependencies )
+dependency_error_${dependency.id}()
+{
+    print_check_msg "${D}dep_checked_${dependency.id}" "checking for ${dependency.name}... "
+    #foreach( $sub in $dependency.subdependencies )
+    # dependency $sub.fullName
     while true
     do
         #if( $sub.platform )
-        if isnotplatform "${sub.platform}"; then
+        if notisplatform "${sub.platform}"; then
             break
         fi
         #end
-        #foreach( $not in $sub.getNotList() )
-        if isplatform "${not}"; then
+        #if( $sub.toolchain )
+        if notistoolchain "${sub.toolchain}"; then
+            break
+        fi
+        #end
+        #foreach( $np in $sub.notList )
+        if isplatform "${np}" || istoolchain "${np}"; then
+            break
+        fi
+        #end
+        #foreach( $lang in $sub.lang )
+        if [ -z "$lang_${lang}" ] ; then
             break
         fi
         #end
@@ -343,24 +344,24 @@
         fi
         #end
         #foreach( $test in $sub.tests )
-        $test > /dev/null
-        if [ $? -ne 0 ]; then
-        break
+        if $test > /dev/null ; then
+            :
+        else
+            break
         fi
         #end
         #foreach( $pkg in $sub.pkgconfig )
-        $pkg.getPkgConfigTestQuery()
-        if [ $? -ne 0 ] ; then
+        if test_pkg_config "$pkg.name" "$pkg.atleast" "$pkg.exact" "$pkg.max" ; then
+            TEMP_CFLAGS="$TEMP_CFLAGS `"$PKG_CONFIG" --cflags $pkg.name`"
+            TEMP_LDFLAGS="$TEMP_LDFLAGS `"$PKG_CONFIG" --libs $pkg.name`"
+        else
             break
         fi
-        TEMP_CFLAGS="$TEMP_CFLAGS `$PKG_CONFIG --cflags $pkg.name`"
-        TEMP_LDFLAGS="$TEMP_LDFLAGS `$PKG_CONFIG --libs $pkg.name`"
         #end
         #foreach( $flags in $sub.flags )
         #if( $flags.exec )
-        $flags.value > /dev/null
-        if [ $? -eq 0 ]; then
-            TEMP_$flags.varName="$TEMP_$flags.varName `$flags.value`"
+        if tmp_flags=`$flags.value` ; then
+            TEMP_$flags.varName="$TEMP_$flags.varName $tmp_flags"
         else
             break
         fi
@@ -374,37 +375,54 @@
 $sub.make
 __EOF__
         #end
-        echo yes
-        return 0
+        print_check_msg "${D}dep_checked_${dependency.id}" "yes\n"
+        dep_checked_${dependency.id}=1
+        return 1
     done
 
     #end
-    echo no
-    return 1
+    print_check_msg "${D}dep_checked_${dependency.id}" "no\n"
+    dep_checked_${dependency.id}=1
+    return 0
 }
 #end
 
+# start collecting dependency information
+echo > "$TEMP_DIR/flags.mk"
+
 DEPENDENCIES_FAILED=
 ERROR=0
 #if( $dependencies.size() > 0 )
-# general dependencies
+# unnamed dependencies
 TEMP_CFLAGS=
+TEMP_CXXFLAGS=
 TEMP_LDFLAGS=
 #foreach( $dependency in $dependencies )
 while true
 do
     #if( $dependency.platform )
-    if isnotplatform "${dependency.platform}"; then
+    if notisplatform "${dependency.platform}"; then
         break
     fi
     #end
-    #foreach( $not in $dependency.getNotList() )
-    if isplatform "${not}"; then
+    #if( $dependency.toolchain )
+    if notistoolchain "${dependency.toolchain}"; then
+        break
+    fi
+    #end
+    #foreach( $np in $dependency.notList )
+    if isplatform "${np}" || istoolchain "${np}"; then
         break
     fi
     #end
     while true
     do
+        #foreach( $lang in $dependency.lang )
+        if [ -z "$lang_${lang}" ] ; then
+            ERROR=1
+            break
+        fi
+        #end
         #if( $dependency.pkgconfig.size() > 0 )
         if [ -z "$PKG_CONFIG" ]; then
             ERROR=1
@@ -412,23 +430,25 @@
         fi
         #end
         #foreach( $pkg in $dependency.pkgconfig )
-        printf "checking for pkg-config package $pkg.name... "
-        $pkg.getPkgConfigTestQuery()
-        if [ $? -ne 0 ]; then
-            echo no
+        print_check_msg "${D}dep_pkgconfig_checked_${pkg.id}" "checking for pkg-config package $pkg.name... "
+        if test_pkg_config "$pkg.name" "$pkg.atleast" "$pkg.exact" "$pkg.max" ; then
+            print_check_msg "${D}dep_pkgconfig_checked_${pkg.id}" "yes\n"
+            dep_pkgconfig_checked_${pkg.id}=1
+            TEMP_CFLAGS="$TEMP_CFLAGS `"$PKG_CONFIG" --cflags $pkg.name`"
+            TEMP_LDFLAGS="$TEMP_LDFLAGS `"$PKG_CONFIG" --libs $pkg.name`"
+        else
+            print_check_msg "${D}dep_pkgconfig_checked_${pkg.id}" "no\n"
+            dep_pkgconfig_checked_${pkg.id}=1
             ERROR=1
             break
         fi
-        echo yes
-        TEMP_CFLAGS="$TEMP_CFLAGS `$PKG_CONFIG --cflags $pkg.name`"
-        TEMP_LDFLAGS="$TEMP_LDFLAGS `$PKG_CONFIG --libs $pkg.name`"
         #end
 
         #foreach( $flags in $dependency.flags )
         #if( $flags.exec )
         $flags.value > /dev/null
-        if [ $? -ne 0 ]; then
-            TEMP_$flags.varName="$TEMP_$flags.varName `$flags.value`"
+        if tmp_flags=`$flags.value` ; then
+            TEMP_$flags.varName="$TEMP_$flags.varName $tmp_flags"
         else
             ERROR=1
             break
@@ -442,24 +462,22 @@
 $dependency.make
 __EOF__
         #end
-
         break
     done
-
     break
 done
 #end
 
-# add general dependency flags to config.mk
-echo >> "$TEMP_DIR/config.mk"
-if [ -n "${TEMP_CFLAGS}" ]; then
-    echo "CFLAGS += $TEMP_CFLAGS" >> $TEMP_DIR/config.mk
+# add general dependency flags to flags.mk
+echo "# general flags" >> "$TEMP_DIR/flags.mk"
+if [ -n "${TEMP_CFLAGS}" ] && [ -n "$lang_c" ]; then
+    echo "CFLAGS += $TEMP_CFLAGS" >> "$TEMP_DIR/flags.mk"
 fi
-if [ -n "${TEMP_CXXFLAGS}" ]; then
-    echo "CXXFLAGS += $TEMP_CXXFLAGS" >> $TEMP_DIR/config.mk
+if [ -n "${TEMP_CXXFLAGS}" ] && [ -n "$lang_cpp" ]; then
+    echo "CXXFLAGS += $TEMP_CXXFLAGS" >> "$TEMP_DIR/flags.mk"
 fi
 if [ -n "${TEMP_LDFLAGS}" ]; then
-    echo "LDFLAGS += $TEMP_LDFLAGS" >> $TEMP_DIR/config.mk
+    echo "LDFLAGS += $TEMP_LDFLAGS" >> "$TEMP_DIR/flags.mk"
 fi
 #end
 
@@ -472,8 +490,7 @@
 {
     VERR=0
     #foreach( $dep in $val.dependencies )
-    dependency_$dep
-    if [ $? -ne 0 ]; then
+    if dependency_error_$dep ; then
         VERR=1
     fi
     #end
@@ -482,6 +499,7 @@
     fi
     #foreach( $def in $val.defines )
         TEMP_CFLAGS="$TEMP_CFLAGS ${def.toFlags()}"
+        TEMP_CXXFLAGS="$TEMP_CXXFLAGS ${def.toFlags()}"
     #end
     #if( $val.hasMake() )
     cat >> "$TEMP_DIR/make.mk" << __EOF__
@@ -496,23 +514,22 @@
 #
 # TARGETS
 #
+
+#foreach( $target in $targets )
+echo >> "$TEMP_DIR/flags.mk"
+#if ( $target.name )
+echo "configuring target: $target.name"
+echo "# flags for target $target.name" >> "$TEMP_DIR/flags.mk"
+#else
+echo "configuring global target"
+echo "# flags for unnamed target" >> "$TEMP_DIR/flags.mk"
+#end
 TEMP_CFLAGS=
 TEMP_CXXFLAGS=
 TEMP_LDFLAGS=
 
-#foreach( $target in $targets )
-#if ( $target.name )
-# Target: $target.name
-#else
-# Target
-#end
-TEMP_CFLAGS=
-TEMP_LDFLAGS=
-TEMP_CXXFLAGS=
-
 #foreach( $dependency in $target.dependencies )
-dependency_$dependency
-if [ $? -ne 0 ]; then
+if dependency_error_$dependency; then
     DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED ${dependency} "
     ERROR=1
 fi
@@ -520,35 +537,39 @@
 
 # Features
 #foreach( $feature in $target.features )
-if [ -n "$${feature.getVarName()}" ]; then
+if [ -n "${D}${feature.varName}" ]; then
 #foreach( $dependency in $feature.dependencies )
     # check dependency
-    dependency_$dependency
-    if [ $? -ne 0 ]; then
+    if dependency_error_$dependency ; then
         # "auto" features can fail and are just disabled in this case
-        if [ "$${feature.getVarName()}" != "auto" ]; then
+        if [ "${D}${feature.varName}" = "auto" ]; then
+            DISABLE_${feature.varName}=1
+        else
             DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED ${dependency} "
             ERROR=1
         fi
     fi
 #end
+    if [ -n "$DISABLE_${feature.varName}" ]; then
+        unset ${feature.varName}
+    fi
 fi
 #end
 
 #foreach( $opt in $target.options )
 # Option: --${opt.argument}
-if [ -z ${D}${opt.getVarName()} ]; then
+if [ -z "${D}${opt.varName}" ]; then
+    echo "auto-detecting option '${opt.argument}'"
     SAVED_ERROR="$ERROR"
     SAVED_DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED"
-    ERROR=0
+    ERROR=1
     while true
     do
         #foreach( $optdef in $opt.defaults )
         #if( $optdef.platform )
         if isplatform "$optdef.platform"; then
         #end
-        $optdef.func
-        if [ $? -eq 0 ]; then
+        if $optdef.func ; then
             echo "  ${opt.argument}: ${optdef.valueName}" >> "$TEMP_DIR/options"
             ERROR=0
             break
@@ -561,55 +582,92 @@
     done
     if [ $ERROR -ne 0 ]; then
         SAVED_ERROR=1
+        SAVED_DEPENDENCIES_FAILED="option '${opt.argument}' $SAVED_DEPENDENCIES_FAILED"
     fi
     ERROR="$SAVED_ERROR"
     DEPENDENCIES_FAILED="$SAVED_DEPENDENCIES_FAILED"
 else
+    echo "checking option ${opt.argument} = ${D}${opt.varName}"
     if false; then
         false
     #foreach( $optval in $opt.values )
-    elif [ "${D}${opt.getVarName()}" = "${optval.value}" ]; then
-        echo "  ${opt.argument}: ${D}${opt.getVarName()}" >> $TEMP_DIR/options
-        $optval.func
-        if [ $? -ne 0 ]; then
+    elif [ "${D}${opt.varName}" = "${optval.value}" ]; then
+        echo "  ${opt.argument}: ${D}${opt.varName}" >> $TEMP_DIR/options
+        if $optval.func ; then
+            :
+        else
             ERROR=1
+            DEPENDENCIES_FAILED="option '${opt.argument}' $DEPENDENCIES_FAILED"
         fi
     #end
     fi
 fi
 #end
 
-echo >> "$TEMP_DIR/config.mk"
-if [ -n "${TEMP_CFLAGS}" ]; then
-    echo "${target.getCFlags()}  += $TEMP_CFLAGS" >> "$TEMP_DIR/config.mk"
+if [ -n "${TEMP_CFLAGS}" ] && [ -n "$lang_c" ]; then
+    echo "${target.cFlags}  += $TEMP_CFLAGS" >> "$TEMP_DIR/flags.mk"
+fi
+if [ -n "${TEMP_CXXFLAGS}" ] && [ -n "$lang_cpp" ]; then
+    echo "${target.cxxFlags}  += $TEMP_CXXFLAGS" >> "$TEMP_DIR/flags.mk"
 fi
-if [ -n "${TEMP_CXXFLAGS}" ]; then
-    echo "${target.getCXXFlags()} += $TEMP_CXXFLAGS" >> "$TEMP_DIR/config.mk"
+if [ "$BUILD_TYPE" = "debug" ]; then
+    if [ -n "$lang_c" ]; then
+        echo '${target.cFlags} += ${DEBUG_CC_FLAGS}' >> "$TEMP_DIR/flags.mk"
+    fi
+    if [ -n "$lang_cpp" ]; then
+        echo '${target.cxxFlags} += ${DEBUG_CXX_FLAGS}' >> "$TEMP_DIR/flags.mk"
+    fi
+fi
+if [ "$BUILD_TYPE" = "release" ]; then
+    if [ -n "$lang_c" ]; then
+        echo '${target.cFlags} += ${RELEASE_CC_FLAGS}' >> "$TEMP_DIR/flags.mk"
+    fi
+    if [ -n "$lang_cpp" ]; then
+        echo '${target.cxxFlags} += ${RELEASE_CXX_FLAGS}' >> "$TEMP_DIR/flags.mk"
+    fi
 fi
 if [ -n "${TEMP_LDFLAGS}" ]; then
-    echo "${target.getLDFlags()} += $TEMP_LDFLAGS" >> "$TEMP_DIR/config.mk"
+    echo "${target.ldFlags} += $TEMP_LDFLAGS" >> "$TEMP_DIR/flags.mk"
 fi
 
 #end
+
+# final result
 if [ $ERROR -ne 0 ]; then
     echo
     echo "Error: Unresolved dependencies"
     echo "$DEPENDENCIES_FAILED"
-    rm -Rf "$TEMP_DIR"
-    exit 1
+    abort_configure
 fi
 
 echo "configure finished"
 echo
 echo "Build Config:"
-echo "  PREFIX:    $PREFIX"
-echo "  TOOLCHAIN: $TOOLCHAIN_NAME"
+echo "  PREFIX:      $prefix"
+echo "  TOOLCHAIN:   $TOOLCHAIN_NAME"
 #if ( $options.size() > 0 )
 echo "Options:"
 cat "$TEMP_DIR/options"
 #end
+#if ( $features.size() > 0 )
+echo "Features:"
+#foreach( $feature in $features )
+if [ -n "${D}${feature.varName}" ]; then
+echo "  $feature.name: on"
+else
+echo "  $feature.name: off"
+fi
+#end
+#end
 echo
-cat "$TEMP_DIR/config.mk" "$TEMP_DIR/make.mk" > config.mk
+
+# generate the config.mk file
+cat > "$TEMP_DIR/config.mk" << __EOF__
+#
+# config.mk generated by configure
+#
+
+__EOF__
+write_toolchain_defaults "$TEMP_DIR/toolchain.mk"
+cat "$TEMP_DIR/vars.mk" "$TEMP_DIR/toolchain.mk" "$TEMP_DIR/flags.mk" "$TEMP_DIR/make.mk" > config.mk
 rm -Rf "$TEMP_DIR"
-
-
diff -r ce97ff16f00e -r 16e5b9d32754 make/gcc.mk
--- a/make/gcc.mk	Sun Jan 28 12:39:08 2024 +0100
+++ b/make/gcc.mk	Sun Jan 28 13:10:18 2024 +0100
@@ -2,10 +2,11 @@
 # gcc toolchain config
 #
 
-CFLAGS = -std=gnu11 -g
-LDFLAGS = 
+CFLAGS = -std=gnu11
+DEBUG_CC_FLAGS = -g
+RELEASE_CC_FLAGS = -O3 -DNDEBUG
+LDFLAGS =
 
 SHLIB_CFLAGS = -fPIC
 SHLIB_LDFLAGS = -shared
 
-
diff -r ce97ff16f00e -r 16e5b9d32754 make/install.mk
--- a/make/install.mk	Sun Jan 28 12:39:08 2024 +0100
+++ b/make/install.mk	Sun Jan 28 13:10:18 2024 +0100
@@ -26,12 +26,10 @@
 # POSSIBILITY OF SUCH DAMAGE.
 #
 
-BUILD_ROOT = ..
-
 include ../config.mk
 
 install: 
-	@echo "install to $(DESTDIR)$(PREFIX)"
-	./install-sh -d $(DESTDIR)$(PREFIX)/bin
-	./install-sh ../build/bin/dav $(DESTDIR)$(PREFIX)/bin
-	./install-sh ../build/bin/dav-sync $(DESTDIR)$(PREFIX)/bin
+	@echo "install to $(prefix)"
+	./install-sh -d $(prefix)/bin
+	./install-sh ../build/bin/dav $(prefix)/bin
+	./install-sh ../build/bin/dav-sync $(prefix)/bin
diff -r ce97ff16f00e -r 16e5b9d32754 make/project.xml
--- a/make/project.xml	Sun Jan 28 12:39:08 2024 +0100
+++ b/make/project.xml	Sun Jan 28 13:10:18 2024 +0100
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project>
+<project xmlns="http://unixwork.de/uwproj">
 	<dependency name="curl" platform="windows">
 		<cflags>-I/mingw/include</cflags>
 		<ldflags>-lcurl</ldflags>
@@ -46,6 +46,7 @@
 	</dependency>
 
 	<dependency>
+		<lang>c</lang>
 		<ldflags>-lm -lpthread</ldflags>
 	</dependency>
 	
diff -r ce97ff16f00e -r 16e5b9d32754 make/suncc.mk
--- a/make/suncc.mk	Sun Jan 28 12:39:08 2024 +0100
+++ b/make/suncc.mk	Sun Jan 28 13:10:18 2024 +0100
@@ -2,9 +2,12 @@
 # suncc toolchain
 #
 
-CFLAGS += -xc99 -g -m64
+CFLAGS += -xc99 -m64
 LDFLAGS += -m64 -Wl,-R,'$$ORIGIN/../lib'
 
+DEBUG_CC_FLAGS = -g
+RELEASE_CC_FLAGS = -O3 -DNDEBUG
+
 SHLIB_CFLAGS = -Kpic
 SHLIB_LDFLAGS = -G -m64
 
diff -r ce97ff16f00e -r 16e5b9d32754 make/toolchain.sh
--- a/make/toolchain.sh	Sun Jan 28 12:39:08 2024 +0100
+++ b/make/toolchain.sh	Sun Jan 28 13:10:18 2024 +0100
@@ -3,179 +3,198 @@
 # toolchain detection
 #
 
-C_COMPILERS="cc gcc clang suncc"
-CPP_COMPILERS="CC g++ clang++ sunCC"
-unset CC_ARG_CHECKED
-unset TOOLCHAIN_DETECTION_ERROR
+if isplatform "bsd" && notisplatform "openbsd"; then
+  C_COMPILERS="clang gcc cc"
+  CPP_COMPILERS="clang++ g++ CC"
+else
+  C_COMPILERS="gcc clang suncc cc"
+  CPP_COMPILERS="g++ clang++ sunCC CC"
+fi
+unset TOOLCHAIN
 unset TOOLCHAIN_NAME
+unset TOOLCHAIN_CC
+unset TOOLCHAIN_CXX
 
 check_c_compiler()
 {
-	cat > $TEMP_DIR/test.c << __EOF__
+  cat > "$TEMP_DIR/test.c" << __EOF__
 /* test file */
 #include <stdio.h>
 int main(int argc, char **argv) {
-#if defined(__clang__)
-	printf("clang\n");
+#if defined(_MSC_VER)
+  printf("msc\n");
+#elif defined(__clang__)
+  printf("clang gnuc\n");
 #elif defined(__GNUC__)
-	printf("gcc\n");
+  printf("gcc gnuc\n");
 #elif defined(__sun)
-	printf("suncc\n");
+  printf("suncc\n");
 #else
-	printf("unknown\n");
+  printf("unknown\n");
 #endif
-	return 0;
+  return 0;
 }
 __EOF__
-	rm -f $TEMP_DIR/checkcc
-	$1 -o $TEMP_DIR/checkcc $CFLAGS $LDFLAGS $TEMP_DIR/test.c 2> /dev/null
-	
-	if [ $? -ne 0 ]; then
-		return 1
-	fi
-	return 0
+  rm -f "$TEMP_DIR/checkcc"
+  $1 -o "$TEMP_DIR/checkcc" $CFLAGS $LDFLAGS "$TEMP_DIR/test.c" 2> /dev/null
 }
 
 check_cpp_compiler()
 {
-	cat > $TEMP_DIR/test.cpp << __EOF__
+  cat > "$TEMP_DIR/test.cpp" << __EOF__
 /* test file */
 #include <iostream>
 int main(int argc, char **argv) {
-#if defined(__clang__)
-	std::cout << "clang" << std::endl;
+#if defined(_MSC_VER)
+  std::cout << "msc" << std::endl;
+#elif defined(__clang__)
+  std::cout << "clang gnuc" << std::endl;
 #elif defined(__GNUC__)
-	std::cout << "gcc" << std::endl;
+  std::cout << "gcc gnuc" << std::endl;
 #elif defined(__sun)
-	std::cout << "suncc" << std::endl;
+  std::cout << "suncc" << std::endl;
 #else
-	std::cout << "unknown" << std::endl;
+  std::cout << "cc" << std::endl;
 #endif
-	return 0;
+  return 0;
+}
+__EOF__
+  rm -f "$TEMP_DIR/checkcc"
+  $1 -o "$TEMP_DIR/checkcc" $CXXFLAGS $LDFLAGS "$TEMP_DIR/test.cpp" 2> /dev/null
+}
+
+create_libtest_source()
+{
+  # $1: filename
+  # $2: optional include
+  cat > "$TEMP_DIR/$1" << __EOF__
+/* libtest file */
+int main(int argc, char **argv) {
+  return 0;
 }
 __EOF__
-	rm -f $TEMP_DIR/checkcc
-	$1 -o $TEMP_DIR/checkcc $CXXFLAGS $LDFLAGS $TEMP_DIR/test.cpp 2> /dev/null
-	
-	if [ $? -ne 0 ]; then
-		return 1
-	fi
-	return 0
+  if [ -n "$2" ]; then
+    echo "#include <$2>" >> "$TEMP_DIR/$1"
+  fi
+}
+
+check_c_lib()
+{
+  # $1: libname
+  # $2: optional include
+  if [ -z "$TOOLCHAIN_CC" ]; then
+    return 1
+  fi
+  create_libtest_source "test.c" "$2"
+  rm -f "$TEMP_DIR/checklib"
+  $TOOLCHAIN_CC -o "$TEMP_DIR/checklib" $CFLAGS $LDFLAGS "-l$1" "$TEMP_DIR/test.c" 2> /dev/null
+}
+
+check_cpp_lib()
+{
+  # $1: libname
+  # $2: optional include
+  if [ -z "$TOOLCHAIN_CXX" ]; then
+    return 1
+  fi
+  create_libtest_source "test.cpp" "$2"
+  rm -f "$TEMP_DIR/checklib"
+  $TOOLCHAIN_CXX -o "$TEMP_DIR/checklib" $CXXFLAGS $LDFLAGS "-l$1" "$TEMP_DIR/test.cpp" 2> /dev/null
+}
+
+check_lib()
+{
+  # $1: libname
+  # $2: optional include
+  if [ -n "$TOOLCHAIN_CC" ]; then
+    check_c_lib "$1" "$2"
+  elif  [ -n "$TOOLCHAIN_CXX" ]; then
+    check_cpp_lib "$1" "$2"
+  fi
 }
 
-printf "detect C compiler... "
+detect_c_compiler()
+{
+  if [ -n "$TOOLCHAIN_CC" ]; then
+    return 0
+  fi
+  printf "detect C compiler... "
+  if [ -n "$CC" ]; then
+    if check_c_compiler "$CC"; then
+      TOOLCHAIN_CC=$CC
+      TOOLCHAIN=`"$TEMP_DIR/checkcc"`
+      TOOLCHAIN_NAME=`echo "$TOOLCHAIN" | cut -f1 -d' ' -`
+      echo "$CC"
+      return 0
+    else
+      echo "$CC is not a working C compiler"
+      return 1
+    fi
+  else
+    for COMP in $C_COMPILERS
+    do
+      if check_c_compiler "$COMP"; then
+        TOOLCHAIN_CC=$COMP
+        TOOLCHAIN=`"$TEMP_DIR/checkcc"`
+        TOOLCHAIN_NAME=`echo "$TOOLCHAIN" | cut -f1 -d' ' -`
+        echo "$COMP"
+        return 0
+      fi
+    done
+    echo "not found"
+    return 1
+  fi
+}
 
-for COMP in $C_COMPILERS
-do
-	check_c_compiler $COMP
-	if [ $? -ne 0 ]; then
-		if [ ! -z "$CC" ]; then
-			if [ $COMP = $CC ]; then
-				echo "$CC is not a working C Compiler"
-				TOOLCHAIN_DETECTION_ERROR="error"
-				break
-			fi
-		fi
-	else
-		TOOLCHAIN_NAME=`$TEMP_DIR/checkcc`
-		USE_TOOLCHAIN=$TOOLCHAIN_NAME
-		if [ $COMP = "cc" ]; then
-			# we have found a working compiler, but in case
-			# the compiler is gcc or clang, we try to use
-			# these commands and not 'cc'
-			TOOLCHAIN_NAME=`$TEMP_DIR/checkcc`
-			if [ $TOOLCHAIN_NAME = "gcc" ]; then
-				check_c_compiler "gcc"
-				if [ $? -eq 0 ]; then
-					COMP=gcc
-					USE_TOOLCHAIN="gcc"
-				fi
-			fi
-			if [ $TOOLCHAIN_NAME = "clang" ]; then
-				check_c_compiler "clang"
-				if [ $? -eq 0 ]; then
-					COMP=clang
-					USE_TOOLCHAIN="clang"
-				fi
-			fi
-		fi
-		
-		TOOLCHAIN_NAME=$USE_TOOLCHAIN
-		TOOLCHAIN_CC=$COMP
-		echo $COMP
-		break
-	fi
-done
-if [ -z $TOOLCHAIN_CC ]; then
-	echo "not found"
-fi
-
-printf "detect C++ compiler... "
+detect_cpp_compiler()
+{
+  if [ -n "$TOOLCHAIN_CXX" ]; then
+    return 0
+  fi
+  printf "detect C++ compiler... "
 
-for COMP in $CPP_COMPILERS
-do
-	check_cpp_compiler $COMP
-	if [ $? -ne 0 ]; then
-		if [ ! -z "$CXX" ]; then
-			if [ $COMP = $CXX ]; then
-				echo "$CC is not a working C++ Compiler"
-				TOOLCHAIN_DETECTION_ERROR="error"
-				break
-			fi
-		fi
-	else
-		if [ $COMP = "CC" ]; then
-			# we have found a working compiler, but in case
-			# the compiler is gcc or clang, we try to use
-			# these commands and not 'cc'
-			TOOLCHAIN_NAME=`$TEMP_DIR/checkcc`
-			USE_TOOLCHAIN=$TOOLCHAIN_NAME
-			if [ $TOOLCHAIN_NAME = "gcc" ]; then
-				check_cpp_compiler "g++"
-				if [ $? -eq 0 ]; then
-				   COMP=g++
-				   USE_TOOLCHAIN="gcc"
-				fi
-			fi
-			if [ $TOOLCHAIN_NAME = "clang" ]; then
-				check_cpp_compiler "clang++"
-				if [ $? -eq 0 ]; then
-				   COMP=clang++
-				   USE_TOOLCHAIN="clang"
-				fi
-			fi
-		fi
-		
-		TOOLCHAIN_NAME=$USE_TOOLCHAIN
-		TOOLCHAIN_CXX=$COMP
-		echo $COMP
-		break
-	fi
-done
-if [ -z $TOOLCHAIN_CXX ]; then
-	echo "not found"
-fi
+  if [ -n "$CXX" ]; then
+    if check_cpp_compiler "$CXX"; then
+      TOOLCHAIN_CXX=$CXX
+      TOOLCHAIN=`"$TEMP_DIR/checkcc"`
+      TOOLCHAIN_NAME=`echo "$TOOLCHAIN" | cut -f1 -d' ' -`
+      echo "$CXX"
+      return 0
+    else
+      echo "$CXX is not a working C++ compiler"
+      return 1
+    fi
+  else
+    for COMP in $CPP_COMPILERS
+    do
+      if check_cpp_compiler "$COMP"; then
+        TOOLCHAIN_CXX=$COMP
+        TOOLCHAIN=`"$TEMP_DIR/checkcc"`
+        TOOLCHAIN_NAME=`echo "$TOOLCHAIN" | cut -f1 -d' ' -`
+        echo "$COMP"
+        return 0
+      fi
+    done
+    echo "${TOOLCHAIN_CXX:-"not found"}"
+    return 1
+  fi
+}
 
-TOOLCHAIN_LD=$TOOLCHAIN_CC
-
-if [ -z "$TOOLCHAIN_NAME" ]; then
-	TOOLCHAIN_DETECTION_ERROR="error"
-else
-	cat >> $TEMP_DIR/config.mk << __EOF__
-# toolchain
-__EOF__
-	echo "CC = ${TOOLCHAIN_CC}" >> $TEMP_DIR/config.mk
-	if [ ! -z "$TOOLCHAIN_CXX" ]; then
-		echo "CXX = ${TOOLCHAIN_CXX}" >> $TEMP_DIR/config.mk
-	fi
-	echo "LD = ${TOOLCHAIN_LD}" >> $TEMP_DIR/config.mk
-	echo >> $TEMP_DIR/config.mk
-	
-	cat "make/${TOOLCHAIN_NAME}.mk" > /dev/null 2>&1
-	if [ $? -eq 0 ]; then 
-		echo "include \$(BUILD_ROOT)/make/${TOOLCHAIN_NAME}.mk" >> $TEMP_DIR/config.mk
-	else
-		echo "SHLIB_CFLAGS = -fPIC" >> $TEMP_DIR/config.mk
-		echo "SHLIB_LDFLAGS = -shared" >> $TEMP_DIR/config.mk
-	fi
-fi
+write_toolchain_defaults()
+{
+  echo "# toolchain" >> "$1"
+  if [ -n "$TOOLCHAIN_CC" ]; then
+    echo "CC = ${TOOLCHAIN_CC}" >> "$1"
+  fi
+  if [ -n "$TOOLCHAIN_CXX" ]; then
+    echo "CXX = ${TOOLCHAIN_CXX}" >> "$1"
+  fi
+  echo >> "$1"
+  if [ -f "make/${TOOLCHAIN_NAME}.mk" ]; then
+    cat "make/${TOOLCHAIN_NAME}.mk" >> "$1"
+  elif [ -f "make/cc.mk" ]; then
+    cat "make/cc.mk" >> "$1"
+  else
+    echo "!!! WARNING !!! Default toolchain flags not found. Configuration might be incomplete."
+  fi
+}
diff -r ce97ff16f00e -r 16e5b9d32754 make/uwproj.xsd
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/make/uwproj.xsd	Sun Jan 28 13:10:18 2024 +0100
@@ -0,0 +1,287 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
+           xmlns="http://unixwork.de/uwproj"
+           targetNamespace="http://unixwork.de/uwproj"
+           elementFormDefault="qualified"
+           version="0.2"
+>
+    <xs:element name="project" type="ProjectType"/>
+
+    <xs:complexType name="ProjectType">
+        <xs:annotation>
+            <xs:documentation>
+                The root element of an uwproj project.
+                Consists of an optional <code>config</code> element
+                and an arbitrary number of <code>dependency</code>
+                and <code>target</code> elements.
+            </xs:documentation>
+        </xs:annotation>
+        <xs:sequence>
+            <xs:element name="config" type="ConfigType" minOccurs="0"/>
+            <xs:element name="dependency" type="DependencyType" minOccurs="0" maxOccurs="unbounded"/>
+            <xs:element name="target" type="TargetType" minOccurs="0" maxOccurs="unbounded"/>
+        </xs:sequence>
+    </xs:complexType>
+
+    <xs:complexType name="ConfigType">
+        <xs:annotation>
+            <xs:documentation>
+                The configuration section.
+                Consists of an arbitrary number of <code>var</code> elements.
+            </xs:documentation>
+        </xs:annotation>
+        <xs:sequence>
+            <xs:element name="var" type="ConfigVarType" minOccurs="0" maxOccurs="unbounded"/>
+        </xs:sequence>
+    </xs:complexType>
+
+    <xs:complexType name="ConfigVarType">
+        <xs:annotation>
+            <xs:documentation>
+                The definition of a configuration variable.
+                <p>
+                    Configuration variables are supposed to be used in the configure script and are also
+                    written to the resulting config file (in contrast to make variables, which are only
+                    written to the config file).
+                    The <code>name</code> attribute is mandatory, the value is defined by the text body of the element.
+                    The optional Boolean <code>exec</code> attribute (false by default) controls, whether the entire
+                    definition is automatically executed under command substitution.
+                </p>
+            </xs:documentation>
+        </xs:annotation>
+        <xs:simpleContent>
+            <xs:extension base="xs:string">
+                <xs:attribute name="name" type="xs:string" use="required"/>
+                <xs:attribute name="exec" type="xs:boolean" default="false"/>
+            </xs:extension>
+        </xs:simpleContent>
+    </xs:complexType>
+
+    <xs:complexType name="PkgConfigType">
+        <xs:annotation>
+            <xs:documentation>
+                Instructs configure to invoke <code>pkg-config</code>, if present on the system, to determine
+                compiler and linker flags. The text body of this element defines the package name to search.
+                To constrain the allowed versions, use the attributes <code>atleast, exact, max</code>.
+            </xs:documentation>
+        </xs:annotation>
+        <xs:simpleContent>
+            <xs:extension base="xs:string">
+                <xs:attribute name="atleast" type="xs:string"/>
+                <xs:attribute name="exact" type="xs:string"/>
+                <xs:attribute name="max" type="xs:string"/>
+            </xs:extension>
+        </xs:simpleContent>
+    </xs:complexType>
+
+    <xs:simpleType name="LangType">
+        <xs:annotation>
+            <xs:documentation>
+                Requests a compiler for the specified language. Allowed values are
+                c, cpp.
+            </xs:documentation>
+        </xs:annotation>
+        <xs:restriction base="xs:string">
+            <xs:enumeration value="c"/>
+            <xs:enumeration value="cpp"/>
+        </xs:restriction>
+    </xs:simpleType>
+
+    <xs:complexType name="DependencyType">
+        <xs:annotation>
+            <xs:documentation>
+                Declares a dependency.
+                <p>
+                    If the optional <code>name</code> attribute is omitted, the dependency is global
+                    and must be satisfied, otherwise configuration shall fail.
+                    A <em>named dependency</em> can be referenced by a target (or is implicitly referenced
+                    by the default target, if no targets are specified).
+                    Multiple declarations for the same named dependency may exist, in which case each declaration
+                    is checked one after another, until one block is satisfied. The result of the first satisfied
+                    dependency declaration is supposed to be applied to the config file.
+                </p>
+                <p>
+                    The optional <code>platform</code> attribute may specify a <em>single</em> platform identifier and
+                    the optional <code>toolchain</code> attribute may specify a <em>single</em> toolchain.
+                    The optional <code>not</code> attribute may specify a comma-separated list of platform and/or
+                    toolchain identifiers.
+                    The configure script shall skip this dependency declaration if the detected platform and toolchain
+                    is not matching the filter specification of these attributes.
+                </p>
+            </xs:documentation>
+        </xs:annotation>
+        <xs:choice minOccurs="0" maxOccurs="unbounded">
+            <xs:element name="lang" type="LangType"/>
+            <xs:element name="cflags" type="FlagsType"/>
+            <xs:element name="cxxflags" type="FlagsType"/>
+            <xs:element name="ldflags" type="FlagsType"/>
+            <xs:element name="pkgconfig" type="PkgConfigType"/>
+            <xs:element name="test" type="xs:string">
+                <xs:annotation>
+                    <xs:documentation>
+                        Specifies a custom command that shall be executed to test whether this dependency is satisfied.
+                    </xs:documentation>
+                </xs:annotation>
+            </xs:element>
+            <xs:element name="make" type="MakeVarType"/>
+        </xs:choice>
+        <xs:attribute name="name" type="xs:string"/>
+        <xs:attribute name="platform" type="xs:string"/>
+        <xs:attribute name="toolchain" type="xs:string"/>
+        <xs:attribute name="not" type="xs:string"/>
+    </xs:complexType>
+
+    <xs:complexType name="FlagsType">
+        <xs:annotation>
+            <xs:documentation>
+                Instructs configure to append the contents of the element's body to the respective flags variable.
+                If the optional <code>exec</code> flag is set to <code>true</code>, the contents are supposed to be
+                executed under command substitution <em>at configuration time</em> before they are applied.
+            </xs:documentation>
+        </xs:annotation>
+        <xs:simpleContent>
+            <xs:extension base="xs:string">
+                <xs:attribute name="exec" type="xs:boolean" default="false"/>
+            </xs:extension>
+        </xs:simpleContent>
+    </xs:complexType>
+
+    <xs:complexType name="TargetType">
+        <xs:annotation>
+            <xs:documentation>
+                Declares a build target that is supposed to be configured.
+                <p>
+                    If no build target is declared explicitly, an implicit default
+                    target is generated, which has the <code>alldependencies</code>
+                    flag set.
+                </p>
+                <p>
+                    The optional <code>name</code> attribute is also used to generate a prefix
+                    for the compiler and linker flags variables.
+                    Furthermore, a target may consist of an arbitrary number of <code>feature</code>,
+                    <code>option</code>, and <code>define</code> elements.
+                    Named dependencies can be listed (separated by comma) in the <code>dependencies</code>
+                    element. If this target shall use <em>all</em> available named dependencies, the empty
+                    element <code>alldependencies</code> can be used as a shortcut.
+                </p>
+            </xs:documentation>
+        </xs:annotation>
+        <xs:choice minOccurs="0" maxOccurs="unbounded">
+            <xs:element name="feature" type="FeatureType"/>
+            <xs:element name="option" type="OptionType"/>
+            <xs:element name="define" type="DefineType"/>
+            <xs:element name="dependencies" type="DependenciesType"/>
+            <xs:element name="alldependencies">
+                <xs:complexType/>
+            </xs:element>
+        </xs:choice>
+        <xs:attribute name="name" type="xs:string"/>
+    </xs:complexType>
+
+    <xs:complexType name="FeatureType">
+        <xs:annotation>
+            <xs:documentation>
+                Declares an optional feature, that can be enabled during configuration, if all
+                <code>dependencies</code> are satisfied.
+                If a feature is enabled, all <code>define</code> and <code>make</code> definitions are
+                supposed to be applied to the config file.
+                In case the optional <code>default</code> attribute is set to true, the feature is enabled by default
+                and is supposed to be automatically disabled (without error) when the dependencies are not satisfied.
+                The name that is supposed to be used for the --enable and --disable arguments can be optionally
+                specified with the <code>arg</code> attribute. Otherwise, the <code>name</code> is used by default.
+                Optionally, a description for the help text of the resulting configure script can be specified by
+                adding a <code>desc</code> element.
+            </xs:documentation>
+        </xs:annotation>
+        <xs:choice minOccurs="0" maxOccurs="unbounded">
+            <xs:group ref="TargetDataGroup"/>
+            <xs:element name="desc" type="xs:string"/>
+        </xs:choice>
+        <xs:attribute name="name" type="xs:string" use="required"/>
+        <xs:attribute name="arg" type="xs:string"/>
+        <xs:attribute name="default" type="xs:boolean" default="false"/>
+    </xs:complexType>
+
+    <xs:complexType name="OptionType">
+        <xs:annotation>
+            <xs:documentation>
+                Declares a configuration option.
+                The option argument name is specified with the <code>arg</code> attribute.
+                Then, the children of this element specify possible <code>values</code> by defining the conditions
+                (in terms of dependencies) and effects (in terms of defines and make variables) of each value.
+                Finally, a set of <code>default</code>s is specified which supposed to automagically select the most
+                appropriate value for a specific platform under the available dependencies (in case the option is not
+                explicitly specified by using the command line argument).
+            </xs:documentation>
+        </xs:annotation>
+        <xs:sequence>
+            <xs:element name="value" type="OptionValueType" minOccurs="0" maxOccurs="unbounded"/>
+            <xs:element name="default" type="OptionDefaultType" minOccurs="0" maxOccurs="unbounded"/>
+        </xs:sequence>
+        <xs:attribute name="arg" type="xs:string" use="required"/>
+    </xs:complexType>
+
+    <xs:complexType name="OptionValueType">
+        <xs:annotation>
+            <xs:documentation>
+                Declares a possible value for the option (in the <code>str</code> attribute) and
+                the conditions (<code>dependencies</code>) and effects, the value has.
+            </xs:documentation>
+        </xs:annotation>
+        <xs:choice minOccurs="0" maxOccurs="unbounded">
+            <xs:group ref="TargetDataGroup"/>
+        </xs:choice>
+        <xs:attribute name="str" type="xs:string" use="required"/>
+    </xs:complexType>
+
+    <xs:complexType name="OptionDefaultType">
+        <xs:annotation>
+            <xs:documentation>
+                Specifies a default value for this option. Multiple default values can be specified, in which case
+                they are checked one after another for availability. With the optional <code>platform</code> attribute,
+                the default value can be constrained to a <em>single</em> specific platform and is supposed to be
+                skipped by configure, when this platform is not detected.
+            </xs:documentation>
+        </xs:annotation>
+        <xs:attribute name="value" type="xs:string" use="required"/>
+        <xs:attribute name="platform" type="xs:string"/>
+    </xs:complexType>
+
+    <xs:group name="TargetDataGroup">
+        <xs:choice>
+            <xs:element name="define" type="DefineType" minOccurs="0" maxOccurs="unbounded"/>
+            <xs:element name="dependencies" type="DependenciesType" minOccurs="0" maxOccurs="unbounded"/>
+            <xs:element name="make" type="MakeVarType" minOccurs="0" maxOccurs="unbounded"/>
+        </xs:choice>
+    </xs:group>
+
+    <xs:complexType name="DefineType">
+        <xs:annotation>
+            <xs:documentation>
+                Specifies C/C++ pre-processor definitions that are supposed to
+                be appended to the compiler flags, if supported.
+                (Note: for example, Fortran also supports C/C++ style pre-processor definitions under
+                certain circumstances)
+            </xs:documentation>
+        </xs:annotation>
+        <xs:attribute name="name" type="xs:string" use="required"/>
+        <xs:attribute name="value" type="xs:string"/>
+    </xs:complexType>
+
+    <xs:simpleType name="DependenciesType">
+        <xs:annotation>
+            <xs:documentation>A comma-separated list of named dependencies.</xs:documentation>
+        </xs:annotation>
+        <xs:restriction base="xs:string"/>
+    </xs:simpleType>
+
+    <xs:simpleType name="MakeVarType">
+        <xs:annotation>
+            <xs:documentation>
+                The text contents in the body of this element are supposed to be appended literally
+                to the config file without prior processing.
+            </xs:documentation>
+        </xs:annotation>
+        <xs:restriction base="xs:string"/>
+    </xs:simpleType>
+</xs:schema>
diff -r ce97ff16f00e -r 16e5b9d32754 test/Makefile
--- a/test/Makefile	Sun Jan 28 12:39:08 2024 +0100
+++ b/test/Makefile	Sun Jan 28 13:10:18 2024 +0100
@@ -26,8 +26,6 @@
 # POSSIBILITY OF SUCH DAMAGE.
 #
 
-BUILD_ROOT = ..
-
 include ../config.mk
 
 TEST_SRC  = main.c
@@ -44,7 +42,7 @@
 all: $(TEST_TARGET)
 
 $(TEST_TARGET): $(TEST_OBJ) ../build/lib/libidav$(LIB_EXT)
-	$(LD) -o $(TEST_TARGET) $(TEST_OBJ) \
+	$(CC) -o $(TEST_TARGET) $(TEST_OBJ) \
 		../build/lib/libidav$(LIB_EXT) ../build/lib/libucx$(LIB_EXT)  \
 		$(LDFLAGS) $(DAV_LDFLAGS)
 
diff -r ce97ff16f00e -r 16e5b9d32754 ucx/Makefile
--- a/ucx/Makefile	Sun Jan 28 12:39:08 2024 +0100
+++ b/ucx/Makefile	Sun Jan 28 13:10:18 2024 +0100
@@ -26,7 +26,6 @@
 # POSSIBILITY OF SUCH DAMAGE.
 #
 
-BUILD_ROOT = ../
 include ../config.mk
 
 # list of source files