[Bug c/41025] New: v4.3.3, 4.4.1, etc -ftracer sometimes fails by "is already defined"

["mahatma at eu dot by" <gcc-bugzilla at gcc dot gnu dot org>]

-ftracer on various gcc versions sometimes gives "is already defined" error on
build. Was on glibc (x86_*) & linux kernel (x86_64), but now git-kernel build
good and I not going deep. Only glibc 2.10.1 log tail:
===
[...]
i686-pc-linux-gnu-gcc ../sysdeps/unix/sysv/linux/dl-execstack.c -c -std=gnu99
-fgnu89-inline -O2 -Wall -Winline -Wwrite-strings -fmerge-all-constants
-fno-strict-aliasing -pipe -Wstrict-prototypes -mpreferred-stack-boundary=2 
-fPIC -g0 -O99 -fomit-frame-pointer -D__USE_STRING_INLINES    -I../include
-I/var/tmp/portage/sys-libs/glibc-2.10.1/work/build-default-i686-pc-linux-gnu-nptl/elf
-I/var/tmp/portage/sys-libs/glibc-2.10.1/work/build-default-i686-pc-linux-gnu-nptl
-I../sysdeps/i386/elf -I../nptl/sysdeps/unix/sysv/linux/i386/i686
-I../nptl/sysdeps/unix/sysv/linux/i386 -I../sysdeps/unix/sysv/linux/i386
-I../nptl/sysdeps/unix/sysv/linux -I../nptl/sysdeps/pthread
-I../sysdeps/pthread -I../sysdeps/unix/sysv/linux -I../sysdeps/gnu
-I../sysdeps/unix/common -I../sysdeps/unix/mman -I../sysdeps/unix/inet
-I../sysdeps/unix/sysv/i386 -I../nptl/sysdeps/unix/sysv -I../sysdeps/unix/sysv
-I../sysdeps/unix/i386 -I../nptl/sysdeps/unix -I../sysdeps/unix
-I../sysdeps/posix -I../sysdeps/i386/i686/fpu -I../nptl/sysdeps/i386/i686
-I../sysdeps/i386/i686 -I../sysdeps/i386/i486 -I../nptl/sysdeps/i386/i486
-I../sysdeps/i386/fpu -I../nptl/sysdeps/i386 -I../sysdeps/i386
-I../sysdeps/wordsize-32 -I../sysdeps/ieee754/ldbl-96
-I../sysdeps/ieee754/dbl-64 -I../sysdeps/ieee754/flt-32 -I../sysdeps/ieee754
-I../sysdeps/generic/elf -I../sysdeps/generic -I../nptl  -I.. -I../libio -I.
-nostdinc -isystem /usr/lib/gcc/i686-pc-linux-gnu/4.3.3/include -isystem
/usr/lib/gcc/i686-pc-linux-gnu/4.3.3/include-fixed -isystem /usr/include
-D_LIBC_REENTRANT -include ../include/libc-symbols.h  -DPIC -DSHARED
-DNOT_IN_libc=1 -DIS_IN_rtld=1     -pipe -fomit-frame-pointer -ftracer
-U_FORTIFY_SOURCE -U_FORTIFY_SOURCE -o
/var/tmp/portage/sys-libs/glibc-2.10.1/work/build-default-i686-pc-linux-gnu-nptl/elf/dl-execstack.os
-MD -MP -MF
/var/tmp/portage/sys-libs/glibc-2.10.1/work/build-default-i686-pc-linux-gnu-nptl/elf/dl-execstack.os.dt
-MT
/var/tmp/portage/sys-libs/glibc-2.10.1/work/build-default-i686-pc-linux-gnu-nptl/elf/dl-execstack.os 
../sysdeps/unix/sysv/linux/dl-execstack.c: Assembler messages:
../sysdeps/unix/sysv/linux/dl-execstack.c:163: Error: symbol
`__i686.get_pc_thunk.cx' is already defined
make[2]: ***
[/var/tmp/portage/sys-libs/glibc-2.10.1/work/build-default-i686-pc-linux-gnu-nptl/elf/dl-execstack.os]
Error 1
make[2]: Leaving directory
`/var/tmp/portage/sys-libs/glibc-2.10.1/work/glibc-2.10.1/elf'
make[1]: *** [elf/subdir_lib] Error 2
make[1]: Leaving directory
`/var/tmp/portage/sys-libs/glibc-2.10.1/work/glibc-2.10.1'
make: *** [all] Error 2
===


-- 
           Summary: v4.3.3, 4.4.1, etc -ftracer sometimes fails by "is
                    already defined"
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: mahatma at eu dot by
  GCC host triplet: i686-pc-linux-gnu-gcc, x86_64-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41025