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| author | dim <dim@FreeBSD.org> | 2011-11-06 14:07:23 +0000 |
|---|---|---|
| committer | dim <dim@FreeBSD.org> | 2011-11-06 14:07:23 +0000 |
| commit | 897775d6ee89e54e447e35fd09436a65a620307d (patch) | |
| tree | fa91394f6c2cb70ed6b8ba7066b85e3fb9376e3f /gnu/lib | |
| parent | f22dd3ece04a16c3b03a815c5753a37600ec5797 (diff) | |
| download | FreeBSD-src-897775d6ee89e54e447e35fd09436a65a620307d.zip FreeBSD-src-897775d6ee89e54e447e35fd09436a65a620307d.tar.gz | |
When one attempts to compile the tree with -march=i386, which also used
to be gcc's default before r198344, calls to atomic builtins will not be
expanded inline. Instead, they will be generated as calls to external
functions (e.g. __sync_fetch_and_add_N), leading to linking errors later
on.
Put in a seatbelt that disables use of atomic builtins in libstdc++ and
llvm, when tuning specifically for the real i386 CPU. This does not
protect against all possible issues, but it is better than nothing.
Diffstat (limited to 'gnu/lib')
| -rw-r--r-- | gnu/lib/libstdc++/config.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/gnu/lib/libstdc++/config.h b/gnu/lib/libstdc++/config.h index 4109752..a4afbdb 100644 --- a/gnu/lib/libstdc++/config.h +++ b/gnu/lib/libstdc++/config.h @@ -671,7 +671,7 @@ /* #undef VERSION */ /* Define if builtin atomic operations are supported on this host. */ -#if defined(__amd64__) || defined(__i386__) +#if defined(__amd64__) || (defined(__i386__) && !defined(__tune_i386__)) #define _GLIBCXX_ATOMIC_BUILTINS 1 #endif |
