Re: C++ bootstrap of GCC - still useful ?

[Laurent GUERBY <laurent at guerby dot net>]

On Mon, 2011-07-11 at 13:58 -0700, Ian Lance Taylor wrote:
> Eric Botcazou <ebotcazou@adacore.com> writes:
> 
> >> If there is an up to date patch, I'm happy to review it if it would
> >> help.  But perhaps an Ada maintainer would prefer to do the review, I
> >> don't know what the usual policy is as I've never approved an Ada patch.
> >
> > The patch is here: http://gcc.gnu.org/ml/gcc-patches/2011-07/msg00845.html
> 
> Thanks.
> 
> I'm not sure that always setting LINKER=$(CXX) in gnattools/Makefile.in
> is correct.  It seems to me that that should vary based on
> --enable-build-with-cxx, as is done in gcc/Makefile.in.  But I don't
> know much about building Ada, and perhaps this is right.

Hi,

Paolo did suggest something like that:

http://gcc.gnu.org/ml/gcc/2009-06/msg00639.html
<<
I think you should rather do

	"CC=../../xgcc -B../../" \
+	"CXX=../../g++ -B../../" \
        "CFLAGS=$(CFLAGS) $(WARN_CFLAGS)" \
+       "CXXFLAGS=$(CXXFLAGS) $(WARN_CFLAGS)" \

and copy the setting of COMPILER and LINKER from gcc/Makefile.in into
gcc/ada/gcc-interface/Makefile.in:

ENABLE_BUILD_WITH_CXX = @ENABLE_BUILD_WITH_CXX@
ifneq ($(ENABLE_BUILD_WITH_CXX),yes)
COMPILER = $(CC)
COMPILER_FLAGS = $(CFLAGS)
LINKER = $(CC)
LINKER_FLAGS = $(CFLAGS)
else
COMPILER = $(CXX)
COMPILER_FLAGS = $(CXXFLAGS)
LINKER = $(CXX)
LINKER_FLAGS = $(CXXFLAGS)
endif

Paolo
>>

Now I don't know if we intend to support build without CXX
in the near future :).

Sincerely,

Laurent