[Bug libc/16689] New: [powerpc] Using bzero with -static fails for PPC32

["azanella at linux dot vnet.ibm.com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=16689

            Bug ID: 16689
           Summary: [powerpc] Using bzero with -static fails for PPC32
           Product: glibc
           Version: 2.19
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: azanella at linux dot vnet.ibm.com
                CC: drepper.fsp at gmail dot com

Using bzero in a static build for a GLIBC 2.19+ build for powerpc32 configure
with --with-cpu=power4 of newer (to use IFUNC) fails with the following
message:

$ cat testcase.c
#include <strings.h>

int main ()
 {
   char s[4096*16];
   size_t i;
   bzero (s, sizeof s);
   for (i=0; i<sizeof s; ++i)
     if (s[i] != '\0')
       printf ("%i != 0\n", i);
   return 0;
 }

$ gcc -static testcase.c
/tmp/ccLzAimd.o: In function `main':
testcase.c:(.text+0x2c): undefined reference to `bzero'
collect2: error: ld returned 1 exit status

The issue is bzero symbol was not being built for static build and the default
ppc implementation (sysdeps/powerpc/powerpc32/power4/multiarch/bzero-ppc32.S) 
is calling an non existing symbol in static build (__memset_ppc)

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