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libstdc++: Do not use 64-bit DARN on 32-bit powerpc [PR103146]
author
Jonathan Wakely
<jwakely@redhat.com>
Tue, 9 Nov 2021 09:34:23 +0000
(09:34 +0000)
committer
Jonathan Wakely
<jwakely@redhat.com>
Tue, 9 Nov 2021 14:40:33 +0000
(14:40 +0000)
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__.
libstdc++-v3/src/c++11/random.cc
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diff --git
a/libstdc++-v3/src/c++11/random.cc
b/libstdc++-v3/src/c++11/random.cc
index
4a553e0
..
76857e1
100644
(file)
--- 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 __powerpc
64
__ && defined __BUILTIN_CPU_SUPPORTS__
# define USE_DARN 1
#endif