diff -ruN --exclude=CVS /usr/ports/archivers/pbzip2/Makefile /usr/home/lioux/src/myports/tmp/pbzip2/Makefile
--- /usr/ports/archivers/pbzip2/Makefile	2009-01-18 07:27:08.000000000 -0200
+++ /usr/home/lioux/src/myports/tmp/pbzip2/Makefile	2009-01-18 07:25:26.000000000 -0200
@@ -25,7 +25,7 @@
 post-patch:
 	@${REINPLACE_CMD} \
 		-e 's,-pthread -lpthread,${PTHREAD_LIBS},g; \
-		s,-O3,${CXXFLAGS},; \
+		s,-O2,${CXXFLAGS},; \
 		s,^CC,#CC,; \
 		s,CC,CXX,' ${WRKSRC}/Makefile