[RFC 2/2] Fold compat_symbol_unique functionality into compat_symbol

[Florian Weimer]

* Adhemerval Zanella:

> I am seeing this with binutils 2.33 on i686-linux-gnu:
>
> x86_64-glibc-linux-gnu-gcc -m32 -march=i686 malloc.c -c -std=gnu11 -fgnu89-inline  -g -O2 -Wall -Wwrite-strings -Wundef -Werror -fmerge-all-constants -frounding-math -fno-stack-protector -Wstrict-prototypes -Wold-style-definition -fmath-errno   -fPIC -Wa,-mtune=i686  -DMORECORE_CLEARS=2  -ftls-model=initial-exec      -I../include -I/home/azanella/Projects/glibc/build/i686-linux-gnu/malloc  -I/home/azanella/Projects/glibc/build/i686-linux-gnu  -I../sysdeps/unix/sysv/linux/i386/i686  -I../sysdeps/i386/i686/nptl  -I../sysdeps/unix/sysv/linux/i386  -I../sysdeps/unix/sysv/linux/x86/include -I../sysdeps/unix/sysv/linux/x86  -I../sysdeps/x86/nptl  -I../sysdeps/i386/nptl  -I../sysdeps/unix/sysv/linux/include -I../sysdeps/unix/sysv/linux  -I../sysdeps/nptl  -I../sysdeps/pthread  -I../sysdeps/gnu  -I../sysdeps/unix/inet  -I../sysdeps/unix/sysv  -I../sysdeps/unix/i386  -I../sysdeps/unix  -I../sysdeps/posix  -I../sysdeps/i386/i686/fpu/multiarch  -I../sysdeps/i386/i686/fpu  -I../sysdeps/i386/i686/multiarch  -I../sysdeps/i386/i686  -I../sysdeps/i386/fpu  -I../sysdeps/x86/fpu  -I../sysdeps/i386  -I../sysdeps/x86/include -I../sysdeps/x86  -I../sysdeps/wordsize-32  -I../sysdeps/ieee754/float128  -I../sysdeps/ieee754/ldbl-96/include -I../sysdeps/ieee754/ldbl-96  -I../sysdeps/ieee754/dbl-64  -I../sysdeps/ieee754/flt-32  -I../sysdeps/ieee754  -I../sysdeps/generic  -I.. -I../libio -I.   -D_LIBC_REENTRANT -include /home/azanella/Projects/glibc/build/i686-linux-gnu/libc-modules.h -DMODULE_NAME=libc -include ../include/libc-symbols.h  -DPIC -DSHARED  -DUSE_TCACHE=1   -DTOP_NAMESPACE=glibc -o /home/azanella/Projects/glibc/build/i686-linux-gnu/malloc/malloc.os -MD -MP -MF /home/azanella/Projects/glibc/build/i686-linux-gnu/malloc/malloc.os.dt -MT /home/azanella/Projects/glibc/build/i686-linux-gnu/malloc/malloc.os
> /tmp/ccrOfJvr.s: Assembler messages:
> /tmp/ccrOfJvr.s: Error: `__SI__malloc_initialize_hook_0' can't be equated to common symbol `__malloc_initialize_hook'

Ahh, the GCC version is actually relevant here.  It needs __attribute__
((nocommon)).  I will at it.

Are there any other symbols with the same problem?

Thanks,
Florian