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* [gcc r12-5057] libstdc++: Do not use 64-bit DARN on 32-bit powerpc [PR103146]
@ 2021-11-09 15:14 Jonathan Wakely
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From: Jonathan Wakely @ 2021-11-09 15:14 UTC (permalink / raw)
  To: gcc-cvs, libstdc++-cvs

https://gcc.gnu.org/g:d9ebf0ce0845046cdd0cb40c598072bd1d91362c

commit r12-5057-gd9ebf0ce0845046cdd0cb40c598072bd1d91362c
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Tue Nov 9 09:34:23 2021 +0000

    libstdc++: Do not use 64-bit DARN on 32-bit powerpc [PR103146]
    
    We need to use the 64-bit DARN to detect failure without bias, but it's
    not available in 32-bit mode.
    
    libstdc++-v3/ChangeLog:
    
            PR libstdc++/103146
            * src/c++11/random.cc: Check __powerpc64__ not __powerpc__.

Diff:
---
 libstdc++-v3/src/c++11/random.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libstdc++-v3/src/c++11/random.cc b/libstdc++-v3/src/c++11/random.cc
index 4a553e0d84f..76857e1efe5 100644
--- a/libstdc++-v3/src/c++11/random.cc
+++ b/libstdc++-v3/src/c++11/random.cc
@@ -37,7 +37,7 @@
 # ifdef _GLIBCXX_X86_RDSEED
 #  define USE_RDSEED 1
 # endif
-#elif defined __powerpc__ && defined __BUILTIN_CPU_SUPPORTS__
+#elif defined __powerpc64__ && defined __BUILTIN_CPU_SUPPORTS__
 # define USE_DARN 1
 #endif


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