PowerPC: Fix bzero definition for static libc for PPC32

This patch fixes an issue for powerpc32-fpu static build which fails
with an 'bzero' undefined reference. This patch adds bzero ifunc selector
for static builds and fixes the '__bzero_ppc' reference to default
memset symbol (since static memset build does not provide ifunc
selector).

Fixes BZ#16689.

ChangeLog

@@ -1,3 +1,12 @@
+2014-03-12  Adhemerval Zanella  <azanella@linux.vnet.ibm.com>
+
+	[BZ #16689]
+	* sysdeps/powerpc/powerpc32/power4/multiarch/bzero-ppc32.S
+	(__bzero_ppc): Call memset@local instead of __memset_ppc@local for
+	static build.
+	* sysdeps/powerpc/powerpc32/power4/multiarch/bzero.c: Build IFUNC
+	selector for static builds.
+
 2014-03-12  Siddhesh Poyarekar  <siddhesh@redhat.com>
 
 	[BZ #16695]

NEWS

@@ -10,7 +10,8 @@ Version 2.20
 * The following bugs are resolved with this release:
 
   15347, 15804, 15894, 16447, 16532, 16545, 16574, 16600, 16609, 16610,
-  16611, 16613, 16623, 16632, 16639, 16670, 16674, 16677, 16683, 16695.
+  16611, 16613, 16623, 16632, 16639, 16670, 16674, 16677, 16683, 16689,
+  16695.
 
 * The am33 port, which had not worked for several years, has been removed
   from ports.

sysdeps/powerpc/powerpc32/power4/multiarch/bzero-ppc32.S

@@ -19,8 +19,17 @@
 
 #include <sysdep.h>
 
+/* memset ifunc selector is not built for static and memset@local
+   for shared builds makes the linker point the call to the ifunc
+   selector.  */
+#ifdef SHARED
+# define MEMSET __memset_ppc
+#else
+# define MEMSET memset
+#endif
+
 ENTRY (__bzero_ppc)
         mr      r5,r4
         li      r4,0
-        b       __memset_ppc@local
+        b       MEMSET@local
 END (__bzero_ppc)

sysdeps/powerpc/powerpc32/power4/multiarch/bzero.c

@@ -17,7 +17,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 /* Define multiple versions only for definition in libc.  */
-#if defined SHARED && !defined NOT_IN_libc
+#ifndef NOT_IN_libc
 # include <string.h>
 # include <strings.h>
 # include "init-arch.h"