Build i386.rpm libgomp and libsupc++.a(guard.o) as i486+, pre-i486 hardware isn't supported because NPTL doesn't support it anyway. --- libgomp/configure.tgt.jj 2008-01-10 20:53:48.000000000 +0100 +++ libgomp/configure.tgt 2008-03-27 12:44:51.000000000 +0100 @@ -44,14 +44,14 @@ if test $enable_linux_futex = yes; then ;; # 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 ;; @@ -63,7 +63,7 @@ if test $enable_linux_futex = yes; then config_path="linux/x86 linux posix" case " ${CC} ${CFLAGS} " in *" -m32 "*) - XCFLAGS="${XCFLAGS} -march=i486 -mtune=i686" + XCFLAGS="${XCFLAGS} -march=i486 -mtune=generic" ;; esac ;; --- libstdc++-v3/libsupc++/guard.cc.jj 2008-03-01 00:58:24.000000000 +0100 +++ libstdc++-v3/libsupc++/guard.cc 2008-03-27 14:08:44.000000000 +0100 @@ -35,6 +35,27 @@ #include #include #include +#if defined __i386__ && !defined _GLIBCXX_ATOMIC_BUILTINS_4 +# define _GLIBCXX_ATOMIC_BUILTINS_4 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