Author: tijl
Date: Tue Sep 21 12:55:20 2010
New Revision: 212962
URL: http://svn.freebsd.org/changeset/base/212962
Log:
MFC r212286:
GCC defines built-ins for atomic instructions found on i486 and higher.
Because FreeBSD no longer supports the 80386 cpu all code targeting
FreeBSD/i386 necessarily runs on i486 or higher so the compiler
built-ins can be used by default inside libstdc++ and in C++ headers.
This allows newly compiled C++ code to inline some atomic operations.
Old binaries continue to use libstdc++ functions.
PR: 148926
Tested by: Yuri Karaban <tech askold net>
Approved by: kib (mentor)
Modified:
stable/8/gnu/lib/libstdc++/Makefile
stable/8/gnu/lib/libstdc++/config.h
Directory Properties:
stable/8/gnu/lib/libstdc++/ (props changed)
Modified: stable/8/gnu/lib/libstdc++/Makefile
==============================================================================
--- stable/8/gnu/lib/libstdc++/Makefile Tue Sep 21 10:22:29 2010
(r212961)
+++ stable/8/gnu/lib/libstdc++/Makefile Tue Sep 21 12:55:20 2010
(r212962)
@@ -81,7 +81,7 @@ ATOMICITY_H= ${SRCDIR}/config/cpu/${MARC
ATOMICITY_H= ${SRCDIR}/config/cpu/generic/atomicity_mutex/atomicity.h
.endif
-.if ${MACHINE_ARCH} == "amd64"
+.if ${MACHINE_ARCH} == "amd64" || ${MACHINE_ARCH} == "i386"
.if exists(${SRCDIR}/config/cpu/generic/atomicity_builtins/atomicity.h)
ATOMICITY_H= ${SRCDIR}/config/cpu/generic/atomicity_builtins/atomicity.h
.endif
Modified: stable/8/gnu/lib/libstdc++/config.h
==============================================================================
--- stable/8/gnu/lib/libstdc++/config.h Tue Sep 21 10:22:29 2010
(r212961)
+++ stable/8/gnu/lib/libstdc++/config.h Tue Sep 21 12:55:20 2010
(r212962)
@@ -671,7 +671,7 @@
/* #undef VERSION */
/* Define if builtin atomic operations are supported on this host. */
-#if defined(__amd64__)
+#if defined(__amd64__) || defined(__i386__)
#define _GLIBCXX_ATOMIC_BUILTINS 1
#endif
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