[Bug build/14045] New: Build failure on x86-linux with gcc >= 4.5.0

["matthew at linuxfromscratch dot org" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=14045

             Bug #: 14045
           Summary: Build failure on x86-linux with gcc >= 4.5.0
           Product: glibc
           Version: 2.15
            Status: NEW
          Severity: normal
          Priority: P2
         Component: build
        AssignedTo: unassigned@sourceware.org
        ReportedBy: matthew@linuxfromscratch.org
                CC: carlos@systemhalted.org
    Classification: Unclassified


When building Glibc-2.15 on an x86 Linux host and the compiler is GCC-4.7.0,
the build fails with the following error message:

/mnt/lfs/sources/libc-build/math/s_frexp.os.dt -MT
/mnt/lfs/sources/libc-build/math/s_frexp.os
./sysdeps/i386/fpu/s_frexp.S: Assembler messages:
./sysdeps/i386/fpu/s_frexp.S:66: Error: invalid identifier for ".ifdef"
./sysdeps/i386/fpu/s_frexp.S:66: Error: junk at end of line, first unrecognized
character is `1'
./sysdeps/i386/fpu/s_frexp.S:66: Error: junk at end of line, first unrecognized
character is `1'
./sysdeps/i386/fpu/s_frexp.S:66: Error: junk at end of line, first unrecognized
character is `1'
./sysdeps/i386/fpu/s_frexp.S:66: Error: junk at end of line, first unrecognized
character is `.'
./sysdeps/i386/fpu/s_frexp.S:66: Error: junk at end of line, first unrecognized
character is `1'
./sysdeps/i386/fpu/s_frexp.S:66: Error: expected comma after name `' in .size
directive
./sysdeps/i386/fpu/s_frexp.S:66: Error: ".endif" without ".if"
./sysdeps/i386/fpu/s_frexp.S:66: Error: junk `.get_pc_thunk.dx' after
expression
make[2]: *** [/mnt/lfs/sources/libc-build/math/s_frexp.os] Error 1

This issue has been floating around for almost ten years apparently (see an
eglibc patch at http://www.eglibc.org/archives/patches/msg00073.html and
Joseph's reply), but I couldn't see an upstream bug for it, so here it is!

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