Update README info about gcc compability

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

diff --git a/README b/README
index 44a4bf574876ec222d00f7fa6123ccd88f3086d0..1e76f2d1b098bb9579d573fcf8f36211c3c7c5f9 100644 (file)
--- a/README
+++ b/README
@@ -39,6 +39,8 @@ supported, with the following exceptions:
   therefore not compatible with liburcu on x86 32-bit (i386, i486, i586, i686).
   The problem has been reported to the gcc community:
     http://www.mail-archive.com/gcc-bugs@gcc.gnu.org/msg281255.html
+- gcc 3.3 cannot match the "xchg" instruction on 32-bit x86 build.
+  See: http://kerneltrap.org/node/7507
 - Alpha, ia64 and ARM architectures depend on 4.x gcc with atomic builtins
   support.