powerpc: Fix ifuncmain6pie failure with GCC 4.9

This patch fix the elf/ifuncmain6pie failure when building with GCC
4.9+.  For some reason, the compiler removes the branch taken code at
resolve_ifunc (sysdeps/powerpc/powerpc64/dl-machine.h) as dead-code
and thus the testcase fails because the ifunc resolves branches to an
invalid memory location.  It fixes by explicit adding a dependency of
value based on odp variable to avoid compiler optimization.

It fixes BZ#17868.

1 files changed, 6 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index d746e18d59..cd093808ff 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2015-01-24  Adhemerval Zanellla  <azanella@linux.vnet.ibm.com>
+
+	[BZ #17868]
+	* sysdeps/powerpc/powerpc64/dl-machine.h (resolve_ifunc): Force value
+	set dependency from opd value.
+
 2015-01-23  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* sysdeps/x86_64/multiarch/init-arch.c (__init_cpu_features):