powerpc: Export __parse_hwcap_and_convert_at_platform to libc.a.

Commit 67385a01d229751569b6aac067ffdcd813a15d7a added a new feature for
powerpc, where we store HWCAP/Platform bits in the TCB.  In the dynamic
linking case, we use the versioned symbol
'__parse_hwcap_and_convert_at_platform' to verify if this feature is
available.  However, the same symbol was not exported to libc.a, making
it not possible for GCC to check for it prior to link time.

diff --git a/ChangeLog b/ChangeLog
index 83143de1008bbd251e1eeb4355e9356d7f5678c5..a32717ea0560dcb15be34ecf379420d0dc61d4f4 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2015-12-22  Carlos Eduardo Seo  <cseo@linux.vnet.ibm.com>
+
+       * sysdeps/powerpc/hwcapinfo.c: Export symbol
+       __parse_hwcap_and_convert_at_platform to libc.a.
+
 2015-12-22  Carlos Eduardo Seo  <cseo@linux.vnet.ibm.com>
 
        * sysdeps/powerpc/dl-procinfo.c (_dl_powerpc_platforms): Added

diff --git a/sysdeps/powerpc/hwcapinfo.c b/sysdeps/powerpc/hwcapinfo.c
index a115ffccd9e2639077ee5f67099be494ddf5d863..b885f1cff6e5426fae85f5a308a2f856843ca378 100644 (file)
--- a/sysdeps/powerpc/hwcapinfo.c
+++ b/sysdeps/powerpc/hwcapinfo.c
@@ -74,3 +74,11 @@ __tcb_parse_hwcap_and_convert_at_platform (void)
 versioned_symbol (ld, __tcb_parse_hwcap_and_convert_at_platform, \
                  __parse_hwcap_and_convert_at_platform, GLIBC_2_23);
 #endif
+
+/* Export __parse_hwcap_and_convert_at_platform in libc.a.  This is used by
+   GCC to make sure that the HWCAP/Platform bits are stored in the TCB when
+   using __builtin_cpu_is()/__builtin_cpu_supports() in the static case.  */
+#ifndef SHARED
+weak_alias (__tcb_parse_hwcap_and_convert_at_platform, \
+           __parse_hwcap_and_convert_at_platform);
+#endif