diff --git a/libmudflap/ChangeLog b/libmudflap/ChangeLog
index f86730e2090d..d70c6771f079 100644
--- a/libmudflap/ChangeLog
+++ b/libmudflap/ChangeLog
@@ -1,3 +1,11 @@
+2012-07-13  Richard Guenther  <rguenther@suse.de>
+
+	* testsuite/libmudflap.c++/ctors.exp: Explicitely specify -O0.
+	* testsuite/libmudflap.c++/c++frags.exp: Likewise.
+	* testsuite/libmudflap.cth/cthfrags.exp: Likewise.
+	* testsuite/libmudflap.c/cfrags.exp: Likewise.
+	* testsuite/libmudflap.c/externs.exp: Likewise.
+
 2012-07-13  Richard Guenther  <rguenther@suse.de>
 
 	* testsuite/libmudflap.c/fail11-frag.c: Adjust to not look like memset.
diff --git a/libmudflap/testsuite/libmudflap.c++/c++frags.exp b/libmudflap/testsuite/libmudflap.c++/c++frags.exp
index eb900d799113..4e3d244fd1a5 100644
--- a/libmudflap/testsuite/libmudflap.c++/c++frags.exp
+++ b/libmudflap/testsuite/libmudflap.c++/c++frags.exp
@@ -1,5 +1,5 @@
 global MUDFLAP_FLAGS
-set MUDFLAP_FLAGS [list {} {-static} { -O} {-O2} {-O3}]
+set MUDFLAP_FLAGS [list {-O0} {-static} { -O} {-O2} {-O3}]
 
 libmudflap-init c++
 if {$cxx == "g++"} then {
diff --git a/libmudflap/testsuite/libmudflap.c++/ctors.exp b/libmudflap/testsuite/libmudflap.c++/ctors.exp
index b3dda8fd6ec9..df7293dc91c5 100644
--- a/libmudflap/testsuite/libmudflap.c++/ctors.exp
+++ b/libmudflap/testsuite/libmudflap.c++/ctors.exp
@@ -1,5 +1,5 @@
 global MUDFLAP_FLAGS
-set MUDFLAP_FLAGS [list {} {-static} {-O2} {-O3}]
+set MUDFLAP_FLAGS [list {-O0} {-static} {-O2} {-O3}]
 
 libmudflap-init c++
 if {$cxx == "g++"} then {
diff --git a/libmudflap/testsuite/libmudflap.c/cfrags.exp b/libmudflap/testsuite/libmudflap.c/cfrags.exp
index bdaf2196cb7f..ebd67c4ff72d 100644
--- a/libmudflap/testsuite/libmudflap.c/cfrags.exp
+++ b/libmudflap/testsuite/libmudflap.c/cfrags.exp
@@ -1,5 +1,5 @@
 global MUDFLAP_FLAGS
-set MUDFLAP_FLAGS [list {} {-static} {-O2} {-O3}]
+set MUDFLAP_FLAGS [list {-O0} {-static} {-O2} {-O3}]
 
 libmudflap-init c
 
diff --git a/libmudflap/testsuite/libmudflap.c/externs.exp b/libmudflap/testsuite/libmudflap.c/externs.exp
index 773f80cc12a5..5a0297f2ed44 100644
--- a/libmudflap/testsuite/libmudflap.c/externs.exp
+++ b/libmudflap/testsuite/libmudflap.c/externs.exp
@@ -1,5 +1,5 @@
 global MUDFLAP_FLAGS
-set MUDFLAP_FLAGS [list {} {-static} {-O2} {-O3}]
+set MUDFLAP_FLAGS [list {-O0} {-static} {-O2} {-O3}]
 
 libmudflap-init c
 dg-init
diff --git a/libmudflap/testsuite/libmudflap.cth/cthfrags.exp b/libmudflap/testsuite/libmudflap.cth/cthfrags.exp
index a025b03805f6..75d444768384 100644
--- a/libmudflap/testsuite/libmudflap.cth/cthfrags.exp
+++ b/libmudflap/testsuite/libmudflap.cth/cthfrags.exp
@@ -1,5 +1,5 @@
 global MUDFLAP_FLAGS
-set MUDFLAP_FLAGS [list {} {-static -DSTATIC} {-O2} {-O3}]
+set MUDFLAP_FLAGS [list {-O0} {-static -DSTATIC} {-O2} {-O3}]
 
 libmudflap-init c