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Bug#680439: marked as done (gcc-4.7: Fails to build glibc (git master) [amd64]: '__EI___isnan' aliased to external symbol '__GI___isnan')

Your message dated Tue, 06 Nov 2012 20:36:33 +0100
with message-id <509966C1.30705@debian.org>
and subject line fixed in recent gcc-snapshot builds
has caused the Debian Bug report #680439,
regarding gcc-4.7: Fails to build glibc (git master) [amd64]: '__EI___isnan' aliased to external symbol '__GI___isnan'
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
680439: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=680439
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: gcc-4.7
Version: 4.7.1-1
Severity: normal

(See http://sourceware.org/bugzilla/show_bug.cgi?id=14281 for past
history on my investigations on this issue.)

When I try to build glibc, the git master branch, on Debian sid amd64,
I get this error:

make  subdir=math -C math ..=../ subdir_lib
make[2]: Entering directory `/home/lfs/sources/glibc-2.16/math'
gcc ../sysdeps/ieee754/dbl-64/wordsize-64/s_isnan.c -c -std=gnu99
-fgnu89-inline  -O2 -Wall -Winline -Wwrite-strings
-fmerge-all-constants -frounding-math -g -Wstrict-prototypes   -fPIC
 -Wno-uninitialized   -D__NO_MATH_INLINES
-D__LIBC_INTERNAL_MATH_INLINES -I../include
-I/home/lfs/sources/libc-build/math -I/home/lfs/sources/libc-build
-I../sysdeps/unix/sysv/linux/x86_64/64/nptl
-I../sysdeps/unix/sysv/linux/x86_64/64
-I../nptl/sysdeps/unix/sysv/linux/x86_64
-I../nptl/sysdeps/unix/sysv/linux/x86 -I../sysdeps/unix/sysv/linux/x86
-I../sysdeps/unix/sysv/linux/x86_64
-I../sysdeps/unix/sysv/linux/wordsize-64
-I../nptl/sysdeps/unix/sysv/linux -I../nptl/sysdeps/pthread
-I../sysdeps/pthread -I../sysdeps/unix/sysv/linux -I../sysdeps/gnu
-I../sysdeps/unix/inet -I../nptl/sysdeps/unix/sysv
-I../sysdeps/unix/sysv -I../sysdeps/unix/x86_64 -I../nptl/sysdeps/unix
-I../sysdeps/unix -I../sysdeps/posix -I../nptl/sysdeps/x86_64/64
-I../sysdeps/x86_64/64 -I../sysdeps/x86_64/fpu/multiarch
-I../sysdeps/x86_64/fpu -I../sysdeps/x86/fpu
-I../sysdeps/x86_64/multiarch -I../nptl/sysdeps/x86_64
-I../sysdeps/x86_64 -I../sysdeps/x86 -I../sysdeps/ieee754/ldbl-96
-I../sysdeps/ieee754/dbl-64/wordsize-64 -I../sysdeps/ieee754/dbl-64
-I../sysdeps/ieee754/flt-32 -I../sysdeps/wordsize-64
-I../sysdeps/ieee754 -I../sysdeps/generic -I../nptl  -I.. -I../libio
-I.  -D_LIBC_REENTRANT -include ../include/libc-symbols.h  -DPIC
-DSHARED     -o /home/lfs/sources/libc-build/math/s_isnan.os -MD -MP
-MF /home/lfs/sources/libc-build/math/s_isnan.os.dt -MT
/home/lfs/sources/libc-build/math/s_isnan.os
../sysdeps/ieee754/dbl-64/wordsize-64/s_isnan.c:30:1: error:
'__EI___isnan' aliased to external symbol '__GI___isnan'
make[2]: *** [/home/lfs/sources/libc-build/math/s_isnan.os] Error 1
make[2]: Leaving directory `/home/lfs/sources/glibc-2.16/math'
make[1]: *** [math/subdir_lib] Error 2
make[1]: Leaving directory `/home/lfs/sources/glibc-2.16'
make: *** [all] Error 2

I tried building upstream GCC 4.7.1 with a configuration as close as
possible to Debian's:

../gcc-4.7.1/configure -v
--enable-languages=c,c++,go,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.7 --enable-shared --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.7
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--enable-gnu-unique-object --enable-plugin --enable-objc-gc
--with-arch-32=i586 --with-tune=generic --enable-checking=release
--build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu

(This was after doing "(cd /usr/lib; ln -sv x86_64-linux-gnu/*.o .)"
to work around upstream GCC not supporting multiarch.)  Once that was
done building, `pwd`/gcc/xgcc -B`pwd`/gcc -c /tmp/s_isnan.i -o
/tmp/s_isnan.o worked fine from the build directory, whereas gcc -c
/tmp/s_isnan.i -o /tmp/s_isnan.o reproduced the error.  So it looks
like this is most likely an issue introduced by one of the
Debian-specific patches.  (Also, it's a regression from Debian
gcc-4.6, which can compile the same preprocessed source without error.
 I've also verified gcc-4.6 can build all of glibc git master without
error.)

Attaching the preprocessed s_isnan.i file.
-- 
Daniel Schepler

Attachment: s_isnan.i
Description: Binary data


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--- Begin Message --- 
fixed in recent gcc-snapshot builds

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