Re: compilation problems

[Paul Jarc]

These problems are still present in 2.11.56.  Will they be fixed in a
future version, or is there some reason these patches are bad?

I wrote:
> I have the headers for flex (among other things) in a nonstandard
> place, so I put the necessary -I flags in $CPPFLAGS.  Some parts of
> the build process don't seem to notice $CPPFLAGS, though.  This is
> needed for configure to find FlexLexer.h:
>
> --- aclocal.m4~ 2008-07-24 23:33:34.000000000 -0400
> +++ aclocal.m4  2008-07-24 23:33:59.000000000 -0400
> @@ -452,7 +452,7 @@
>  using namespace std;
>  #include <FlexLexer.h>
>  EOF
> -       FLEXLEXER_FILE=`$CXX -E conftest.cc | \
> +       FLEXLEXER_FILE=`eval $ac_cpp conftest.cc | \
>           sed 's!# 1 "\(.*FlexLexer.h\)"address@hidden@\1@@!g' | grep
>           '@@' | \
>           sed 'address@hidden@\(.*\)@@.*$!\1!g' ` 1> /dev/null 2>
>           /dev/null
>         rm conftest.cc
>
> Later, compiling includable-lexer.cc fails, because $CPPFLAGS is only
> used for C compilation, not C++, so FlexLexer.h isn't found at that
> point.  "./configure --help" doesn't mention CXXCPPFLAGS, so I used
> this patch:
>
> --- c++-vars.make~      2008-08-05 10:41:57.000000000 -0400
> +++ c++-vars.make       2008-08-05 10:42:28.000000000 -0400
> @@ -6,7 +6,7 @@
>  #EXTRA_CXXFLAGS += -Werror
>  #endif
>
> -ALL_CXXPPFLAGS = $(DEFINES) $(INCLUDES:%=-I%)
> +ALL_CXXPPFLAGS = $(CPPFLAGS) $(CONFIG_CPPFLAGS) $(DEFINES) $(INCLUDES:%=-I%)
>  ALL_CXXFLAGS = $(CXXFLAGS) $(ALL_CXXPPFLAGS) $($(PACKAGE)_CXXFLAGS) 
> $(CONFIG_CXXFLAGS) $(MODULE_CXXFLAGS) $(EXTRA_CXXFLAGS)
>
>  TCC_FILES := $(call src-wildcard,*.tcc)
>