Use %ifdef in sysdeps/unix/sysv/linux/powerpc/powerpc64/shlib-versions.

This patch makes
sysdeps/unix/sysv/linux/powerpc/powerpc64/shlib-versions use %ifdef
conditionals around the different symbol version definitions for big
and little endian.  (It doesn't actually change the host patterns used
for those definitions; the point is to make it possible to remove the
first column from shlib-versions by eliminating the last case where it
would be harmful for it to be treated as .*-.*-.*.)  The conditional
is based on the ELFv1/ELFv2 distinction rather than BE/LE, since
that's what's already tested in configure and used for the ld.so
soname in the Makefiles.  (Of course if BE ELFv2 were supported in
future, it would get new symbol versions and so need new
conditionals.)

	* sysdeps/unix/sysv/linux/powerpc/powerpc64/configure.ac
	(HAVE_ELFV2_ABI): AC_DEFINE in ELFv2 case.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/configure:
	Regenerated.
	* config.h.in (HAVE_ELFV2_ABI): New macro undefine.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/shlib-versions:
	Condition symbol version definitions on [HAVE_ELFV2_ABI].

ChangeLog

@@ -1,5 +1,13 @@
 2014-09-12  Joseph Myers  <joseph@codesourcery.com>
 
+	* sysdeps/unix/sysv/linux/powerpc/powerpc64/configure.ac
+	(HAVE_ELFV2_ABI): AC_DEFINE in ELFv2 case.
+	* sysdeps/unix/sysv/linux/powerpc/powerpc64/configure:
+	Regenerated.
+	* config.h.in (HAVE_ELFV2_ABI): New macro undefine.
+	* sysdeps/unix/sysv/linux/powerpc/powerpc64/shlib-versions:
+	Condition symbol version definitions on [HAVE_ELFV2_ABI].
+
 	* shlib-versions: Remove OS-specific entries.  Moved to files in
 	sysdeps.
 	* sysdeps/mach/hurd/shlib-versions: New file.

config.h.in

@@ -257,4 +257,7 @@
 /* Define if using the IEEE 754-2008 NaN encoding on the MIPS target.  */
 #undef HAVE_MIPS_NAN2008
 
+/* The PowerPC64 ELFv2 ABI is being used.  */
+#undef HAVE_ELFV2_ABI
+
 #endif

sysdeps/unix/sysv/linux/powerpc/powerpc64/configure

@@ -173,6 +173,9 @@ $as_echo "$libc_cv_ppc64_elfv2_abi" >&6; }
 if test $libc_cv_ppc64_elfv2_abi = yes; then
   config_vars="$config_vars
 default-abi = 64-v2"
+  # For shlib-versions.
+  $as_echo "#define HAVE_ELFV2_ABI 1" >>confdefs.h
+
 else
   config_vars="$config_vars
 default-abi = 64-v1"

sysdeps/unix/sysv/linux/powerpc/powerpc64/configure.ac

@@ -12,6 +12,8 @@ AC_CACHE_CHECK([whether the compiler is using the PowerPC64 ELFv2 ABI],
   ], libc_cv_ppc64_elfv2_abi=yes, libc_cv_ppc64_elfv2_abi=no)])
 if test $libc_cv_ppc64_elfv2_abi = yes; then
   LIBC_CONFIG_VAR([default-abi], [64-v2])
+  # For shlib-versions.
+  AC_DEFINE(HAVE_ELFV2_ABI)
 else
   LIBC_CONFIG_VAR([default-abi], [64-v1])
   # Compiler that do not support ELFv2 ABI does not define _CALL_ELF

sysdeps/unix/sysv/linux/powerpc/powerpc64/shlib-versions

@@ -1,4 +1,7 @@
-powerpc64-.*-linux.*	DEFAULT			GLIBC_2.3
+%ifdef HAVE_ELFV2_ABI
 powerpc.*le-.*-linux.*	DEFAULT			GLIBC_2.17
-powerpc64-.*-linux.*	libpthread=0		GLIBC_2.3
 powerpc.*le-.*-linux.*	libpthread=0		GLIBC_2.17
+%else
+powerpc64-.*-linux.*	DEFAULT			GLIBC_2.3
+powerpc64-.*-linux.*	libpthread=0		GLIBC_2.3
+%endif