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Build i386.rpm libgomp and libsupc++.a(guard.o) as i486+, pre-i486
hardware isn't supported because NPTL doesn't support it anyway.
Index: libgomp/configure.tgt
===================================================================
--- libgomp/configure.tgt.orig 2010-01-28 13:47:59.000000000 -0800
+++ libgomp/configure.tgt 2010-06-25 10:32:26.706135558 -0700
@@ -48,14 +48,14 @@
;;
# Note that bare i386 is not included here. We need cmpxchg.
- i[456]86-*-linux*)
+ i[3456]86-*-linux*)
config_path="linux/x86 linux posix"
case " ${CC} ${CFLAGS} " in
*" -m64 "*)
;;
*)
if test -z "$with_arch"; then
- XCFLAGS="${XCFLAGS} -march=i486 -mtune=${target_cpu}"
+ XCFLAGS="${XCFLAGS} -march=i486 -mtune=generic"
fi
esac
;;
@@ -67,7 +67,7 @@
config_path="linux/x86 linux posix"
case " ${CC} ${CFLAGS} " in
*" -m32 "*)
- XCFLAGS="${XCFLAGS} -march=i486 -mtune=i686"
+ XCFLAGS="${XCFLAGS} -march=i486 -mtune=generic"
;;
esac
;;
Index: libstdc++-v3/libsupc++/guard.cc
===================================================================
--- libstdc++-v3/libsupc++/guard.cc.orig 2009-11-09 14:09:30.000000000 -0800
+++ libstdc++-v3/libsupc++/guard.cc 2010-06-25 10:32:26.710135964 -0700
@@ -30,6 +30,27 @@
#include <new>
#include <ext/atomicity.h>
#include <ext/concurrence.h>
+#if defined __i386__ && !defined _GLIBCXX_ATOMIC_BUILTINS
+# define _GLIBCXX_ATOMIC_BUILTINS 1
+# define __sync_val_compare_and_swap(a, b, c) \
+ ({ \
+ typedef char sltast[sizeof (*a) == sizeof (int) ? 1 : -1]; \
+ int sltas; \
+ __asm __volatile ("lock; cmpxchgl %3, (%1)" \
+ : "=a" (sltas) \
+ : "r" (a), "0" (b), "r" (c) : "memory"); \
+ sltas; \
+ })
+# define __sync_lock_test_and_set(a, b) \
+ ({ \
+ typedef char sltast[sizeof (*a) == sizeof (int) ? 1 : -1]; \
+ int sltas; \
+ __asm __volatile ("xchgl (%1), %0" \
+ : "=r" (sltas) \
+ : "r" (a), "0" (b) : "memory"); \
+ sltas; \
+ })
+#endif
#if defined(__GTHREADS) && defined(__GTHREAD_HAS_COND) \
&& defined(_GLIBCXX_ATOMIC_BUILTINS_4) && defined(_GLIBCXX_HAVE_LINUX_FUTEX)
# include <climits>
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