check compilers before any dependency checks

add basic support for the lang element - fixes #284

add support for cxxflags and fix lang parser

basic implementation of shId()

fix bogus version constraint test - relates to #294

Close Branch configure-evo

merge configure-evo branch

update reference configure scripts configure-evo

simplify parameter substitution configure-evo

removal of failed function in favor what the ancients actually did configure-evo

(0) -10 +10 tip

mercurial