--- a/runConfigureICU
+++ b/runConfigureICU
@@ -254,8 +254,8 @@ case $platform in
THE_COMP="the GNU C++"
CC=gcc; export CC
CXX=g++; export CXX
- RELEASE_CFLAGS='-O3'
- RELEASE_CXXFLAGS='-O3'
+ RELEASE_CFLAGS=' '
+ RELEASE_CXXFLAGS=' '
DEBUG_CFLAGS='-g'
DEBUG_CXXFLAGS='-g'
;;