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#!/bin/sh

HOST=`uname -n`
PREFIX=`pwd`/work
INSTALL_DIR=$PREFIX

EPREFIX=$PREFIX

BINDIR=
SBINDIR=
LIBDIR=
LIBEXECDIR=
DATADIR=
SYSCONFDIR=
SHAREDSTATEDIR=
LOCALSTATEDIR=
INCLUDEDIR=
INFODIR=
MANDIR=

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

# help text
printhelp()
{
	echo "Usage: $0 [OPTIONS]..."
	cat << __EOF__
Installation directories:
  --prefix=PREFIX         path prefix for architecture-independent files
                          [/usr]
  --exec-prefix=EPREFIX   path prefix for architecture-dependent files
                          [PREFIX]

  --bindir=DIR            user executables [EPREFIX/bin]
  --sbindir=DIR           system admin executables [EPREFIX/sbin]
  --libexecdir=DIR        program executables [EPREFIX/libexec]
  --sysconfdir=DIR        system configuration files [PREFIX/etc]
  --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
  --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
  --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]

Optional Features:
  --enable-postgresql

__EOF__
}

#
# parse arguments 
#
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; exit 1 ;;
		"--enable-postgresql") FEATURE_POSTGRESQL=on ;;
		"--disable-postgresql") unset FEATURE_POSTGRESQL ;;
		"-"*) echo "unknown option: $ARG"; exit 1 ;;
	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
fi

which pkg-config > /dev/null
if [ $? -eq 0 ]; then
    PKG_CONFIG=pkg-config
else
    PKG_CONFIG=false
fi

# Simple uname based platform detection
# $PLATFORM is used for platform dependent dependency selection
printf "detect platform... "
if [ $OS = SunOS ]; then
    PLATFORM="solaris sunos unix svr4"
fi
if [ $OS = Linux ]; then
    PLATFORM="linux unix"
fi
if [ $OS = FreeBSD ]; then
    PLATFORM="freebsd bsd unix"
fi
if [ $OS = Darwin ]; then
    PLATFORM="macos osx bsd unix"
fi
echo $OS | grep "MINGW" > /dev/null
if [ $? -eq 0 ]; then
    PLATFORM="windows mingw"
fi

if [ -z "$PLATFORM" ]; then
    PLATFORM="unix"
fi

for p in $PLATFORM
do
	PLATFORM_NAME=$p
	break
done
echo $PLATFORM_NAME

isplatform()
{
    for p in $PLATFORM
    do
        if [ $p = $1 ]; then
            return 0
        fi
    done
    return 1
}
isnotplatform()
{
    for p in $PLATFORM
    do
        if [ $p = $1 ]; then
            return 1
        fi
    done
    return 0
}

# generate config.mk and config.h
cat > $TEMP_DIR/config.mk << __EOF__
#
# config.mk generated by configure
#

# general vars
HOST=$HOST
PREFIX=$PREFIX
INSTALL_DIR=$INSTALL_DIR

EPREFIX=$EPREFIX

BINDIR=$BINDIR
SBINDIR=$SBINDIR
LIBDIR=$LIBDIR
LIBEXECDIR=$LIBEXECDIR
DATADIR=$DATADIR
SYSCONFDIR=$SYSCONFDIR
SHAREDSTATEDIR=$SHAREDSTATEDIR
LOCALSTATEDIR=$LOCALSTATEDIR
INCLUDEDIR=$INCLUDEDIR
INFODIR=$INFODIR
MANDIR=$MANDIR

__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
. make/toolchain.sh

# add user specified flags to config.mk
echo >> $TEMP_DIR/config.mk
if [ ! -z "${ENV_CFLAGS}" ]; then
    echo "CFLAGS += $ENV_CFLAGS" >> $TEMP_DIR/config.mk
fi
if [ ! -z "${ENV_CXXFLAGS}" ]; then
    echo "CXXFLAGS += $ENV_CXXFLAGS" >> $TEMP_DIR/config.mk
fi
if [ ! -z "${ENV_LDFLAGS}" ]; then
    echo "LDFLAGS += $ENV_LDFLAGS" >> $TEMP_DIR/config.mk
fi

#
# DEPENDENCIES
#

dependency_libpq()
{
    printf "checking for libpq... "
    # dependency libpq 
    while true
    do
        if [ -z "$PKG_CONFIG" ]; then
        	break
        fi
		$PKG_CONFIG libpq
        if [ $? -ne 0 ] ; then
            break
        fi
        CFLAGS="$CFLAGS `$PKG_CONFIG --cflags libpq`"
        LDFLAGS="$LDFLAGS `$PKG_CONFIG --libs libpq`"
		cat >> $TEMP_DIR/make.mk << __EOF__
# Dependency: libpq		
CFLAGS += -DENABLE_POSTGRESQL
PLUGINS += postgresql
TEST_PLUGIN_LDFLAGS += -lwspgtest

__EOF__
		echo yes
        return 0
    done
	
	echo no
	return 1
}
dependency_openssl()
{
    printf "checking for openssl... "
    # dependency openssl 
    while true
    do
        if [ -z "$PKG_CONFIG" ]; then
        	break
        fi
		$PKG_CONFIG openssl
        if [ $? -ne 0 ] ; then
            break
        fi
        CFLAGS="$CFLAGS `$PKG_CONFIG --cflags openssl`"
        LDFLAGS="$LDFLAGS `$PKG_CONFIG --libs openssl`"
		echo yes
        return 0
    done
	
    # dependency openssl 
    while true
    do
        LDFLAGS="$LDFLAGS -lssl -lcrypto"    
		echo yes
        return 0
    done
	
	echo no
	return 1
}
dependency_libxml2()
{
    printf "checking for libxml2... "
    # dependency libxml2 
    while true
    do
        if [ -z "$PKG_CONFIG" ]; then
        	break
        fi
		$PKG_CONFIG libxml-2.0
        if [ $? -ne 0 ] ; then
            break
        fi
        CFLAGS="$CFLAGS `$PKG_CONFIG --cflags libxml-2.0`"
        LDFLAGS="$LDFLAGS `$PKG_CONFIG --libs libxml-2.0`"
		echo yes
        return 0
    done
	
	echo no
	return 1
}

DEPENDENCIES_FAILED=
ERROR=0
# general dependencies
CFLAGS=
LDFLAGS=
while true
do
    if isnotplatform "linux"; then
        break
    fi
    while true
    do
        
        CFLAGS="$CFLAGS -DLINUX"    
        LDFLAGS="$LDFLAGS -lpthread -ldl -lm -lldap"    
		cat >> $TEMP_DIR/make.mk << __EOF__
# platform dependend source files
PLATFORM_DAEMONOBJ = event_linux.o

# platform dependend vars
OBJ_EXT = .o
LIB_EXT = .so
APP_EXT =

__EOF__
        
        break
    done
    
    break
done
while true
do
    if isnotplatform "bsd"; then
        break
    fi
    if isplatform "macos"; then
        break
    fi
    while true
    do
        
        CFLAGS="$CFLAGS -DBSD -I/usr/local/include"    
        LDFLAGS="$LDFLAGS -lpthread -lm -lldap"    
		cat >> $TEMP_DIR/make.mk << __EOF__
# platform dependend source files
PLATFORM_DAEMONOBJ = event_bsd.o

# platform dependend vars
OBJ_EXT = .o
LIB_EXT = .so
APP_EXT =

__EOF__
        
        break
    done
    
    break
done
while true
do
    if isnotplatform "macos"; then
        break
    fi
    while true
    do
        
        CFLAGS="$CFLAGS -DBSD -DOSX"    
        LDFLAGS="$LDFLAGS -lpthread -ldl -lm -lldap"    
		cat >> $TEMP_DIR/make.mk << __EOF__
# platform dependend source files
PLATFORM_DAEMONOBJ = event_bsd.o

# platform dependend vars
OBJ_EXT = .o
LIB_EXT = .dylib
APP_EXT =

__EOF__
        
        break
    done
    
    break
done
while true
do
    if isnotplatform "solaris"; then
        break
    fi
    while true
    do
        
        CFLAGS="$CFLAGS -DSOLARIS -D_REENTRANT -D_POSIX_PTHREAD_SEMANTICS"    
        LDFLAGS="$LDFLAGS -lsocket -lnsl -lsendfile -lposix4 -lpthread -ldl -lm -lmd -lldap"    
		cat >> $TEMP_DIR/make.mk << __EOF__
# platform dependend source files
PLATFORM_DAEMONOBJ = event_solaris.o

# platform dependend vars
OBJ_EXT = .o
LIB_EXT = .so
APP_EXT =

__EOF__
        
        break
    done
    
    break
done

# add general dependency flags to config.mk
echo >> $TEMP_DIR/config.mk
if [ ! -z "${CFLAGS}" ]; then
    echo "CFLAGS += $CFLAGS" >> $TEMP_DIR/config.mk
fi
if [ ! -z "${CXXFLAGS}" ]; then
    echo "CXXFLAGS += $CXXFLAGS" >> $TEMP_DIR/config.mk
fi
if [ ! -z "${LDFLAGS}" ]; then
    echo "LDFLAGS += $LDFLAGS" >> $TEMP_DIR/config.mk
fi

#
# OPTION VALUES
#

#
# TARGETS
#
CFLAGS=
CXXFLAGS=
LDFLAGS=

# Target
CFLAGS=
LDFLAGS=
CXXFLAGS=

dependency_libxml2
if [ $? -ne 0 ]; then
	DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED libxml2 "
	ERROR=1
fi
dependency_openssl
if [ $? -ne 0 ]; then
	DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED openssl "
	ERROR=1
fi

# Features


echo >> $TEMP_DIR/config.mk
if [ ! -z "${CFLAGS}" ]; then
    echo "CFLAGS  += $CFLAGS" >> $TEMP_DIR/config.mk
fi
if [ ! -z "${CXXFLAGS}" ]; then
    echo "CXXFLAGS += $CXXFLAGS" >> $TEMP_DIR/config.mk
fi
if [ ! -z "${LDFLAGS}" ]; then
    echo "LDFLAGS += $LDFLAGS" >> $TEMP_DIR/config.mk
fi

# Target: postgresql
CFLAGS=
LDFLAGS=
CXXFLAGS=


# Features
if [ ! -z "$FEATURE_POSTGRESQL" ]; then
	# check dependency
	dependency_libpq
	if [ $? -ne 0 ]; then
		# "auto" features can fail and are just disabled in this case
		if [ $FEATURE_POSTGRESQL != "auto" ]; then
			DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED libpq "
			ERROR=1
		fi
	fi
fi


echo >> $TEMP_DIR/config.mk
if [ ! -z "${CFLAGS}" ]; then
    echo "POSTGRESQL_CFLAGS  += $CFLAGS" >> $TEMP_DIR/config.mk
fi
if [ ! -z "${CXXFLAGS}" ]; then
    echo "POSTGRESQL_CXXFLAGS += $CXXFLAGS" >> $TEMP_DIR/config.mk
fi
if [ ! -z "${LDFLAGS}" ]; then
    echo "POSTGRESQL_LDFLAGS += $LDFLAGS" >> $TEMP_DIR/config.mk
fi

if [ $ERROR -ne 0 ]; then
	echo
	echo "Error: Unresolved dependencies"
	echo $DEPENDENCIES_FAILED
	rm -Rf $TEMP_DIR
	exit 1
fi

echo "configure finished"
echo
echo "Build Config:"
echo "  PREFIX:    $PREFIX"
echo "  TOOLCHAIN: $TOOLCHAIN_NAME"
echo
cat $TEMP_DIR/config.mk $TEMP_DIR/make.mk > config.mk
rm -Rf $TEMP_DIR