Re: gcc-4.7.2 bug in Makefile.in and configure.ac

Re: gcc-4.7.2 bug in Makefile.in and configure.ac

[Jonathan Wakely]

Re: http://gcc.gnu.org/ml/gcc-bugs/2012-09/msg02363.html

Hi,

the gcc-bugs list is for automated mails from the GCC Bugzilla
database.  Please use Bugzilla to report bugs, rather than mailing the
list directly, this ensures the mail will be read and the issue can be
tracked correctly.

The issue you report is already known, you can see it at
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50461 -- to build released
versions of GCC without changing the sources you need to use an older
version of MPFR.

gcc-4.7.2 bug in Makefile.in and configure.ac

[Ernesto Fontenla]

Hello:

Building gcc-4.7.2 on Darwin 9.8.0 i386 with the options

Macintosh-85:gcc-build regular$ /usr/local/gcc-4.7.2/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/usr/local/gcc-4.7.2/bin/gcc
COLLECT_LTO_WRAPPER=/usr/local/gcc-4.7.2/libexec/gcc/i386-apple-darwin9.8.0/4.7.2/lto-wrapper
Target: i386-apple-darwin9.8.0
Configured with: ../gcc-4.7.2/configure --prefix=/usr/local/gcc-4.7.2 
--enable-languages=c,c++
Thread model: posix
gcc version 4.7.2 (GCC)

AND including mpc-1.0, gmp-5.0.5, mpfr-3.1.1 in the subdirectories mpc, 
gmp, mpfr, respectively, of the gcc source tree leads to the following 
error when the build reaches the mpc library:

checking for __gmpz_init in -lgmp... yes
checking for MPFR... no
configure: error: libmpfr not found or uses a different ABI (including 
static vs shared).
make[2]: *** [configure-stage1-mpc] Error 1
make[1]: *** [stage1-bubble] Error 2
make: *** [bootstrap] Error 2

The error is caused by the fact that the configure and Makefile don't 
properly point to the mpfr/src/.libs and mpfr/src directories for 
linking and includes (ditto mpc/src/.libs and mpc/src/).  The following 
changes fix the problem, permitting the compilation to correctly go 
through to completion (all three stages, and install):

Macintosh-85:gcc-4.7.2 regular$ diff Makefile.def.org Makefile.def
58c58
< host_modules= { module= mpfr; lib_path=.libs; bootstrap=true;
---
 > host_modules= { module= mpfr; lib_path=src/.libs; bootstrap=true;
61c61
< host_modules= { module= mpc; lib_path=.libs; bootstrap=true;
---
 > host_modules= { module= mpc; lib_path=src/.libs; bootstrap=true;
Macintosh-85:gcc-4.7.2 regular$ diff Makefile.in.org Makefile.in
653c653
< $$r/$(HOST_SUBDIR)/mpfr/.libs:$$r/$(HOST_SUBDIR)/prev-mpfr/.libs:
---
 > $$r/$(HOST_SUBDIR)/mpfr/src/.libs:$$r/$(HOST_SUBDIR)/prev-mpfr/src/.libs:
658c658
< $$r/$(HOST_SUBDIR)/mpc/.libs:$$r/$(HOST_SUBDIR)/prev-mpc/.libs:
---
 > $$r/$(HOST_SUBDIR)/mpc/src/.libs:$$r/$(HOST_SUBDIR)/prev-mpc/src/.libs:
Macintosh-85:gcc-4.7.2 regular$ diff configure.ac.org configure.ac
1251c1251
<   gmpinc='-I$$s/mpc/src '"$gmpinc"
---
 >   gmpinc='-I$$r/$(HOST_SUBDIR)/mpc/src -I$$s/mpc/src '"$gmpinc"
1289,1291c1289,1291
<   gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/'"$lt_cv_objdir $gmplibs"
<   gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr -I$$s/mpfr '"$gmpinc"
<   extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr 
--with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/'"$lt_cv_objdir"
---
 >   gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir $gmplibs"
 >   gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr/src -I$$s/mpfr/src '"$gmpinc"
 > extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr/src 
--with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir"
Macintosh-85:gcc-4.7.2 regular$ diff configure.org configure
5153c5153
<   gmpinc='-I$$s/mpc/src '"$gmpinc"
---
 >   gmpinc='-I$$r/$(HOST_SUBDIR)/mpc/src -I$$s/mpc/src '"$gmpinc"
5201,5203c5201,5203
<   gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/'"$lt_cv_objdir $gmplibs"
<   gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr -I$$s/mpfr '"$gmpinc"
<   extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr 
--with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/'"$lt_cv_objdir"
---
 >   gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir $gmplibs"
 >   gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr/src -I$$s/mpfr/src '"$gmpinc"
 > extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr/src 
--with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir"
Macintosh-85:gcc-4.7.2 regular$


Regards,
-ernesto