1--- ./icu4c/source/runConfigureICU 2020-09-16 10:29:53.446938469 +0800 2+++ ./icu4c/source/runConfigureICU_cflags 2020-04-23 01:49:10.000000000 +0800 3@@ -247,7 +247,7 @@ case $platform in 4 Linux*) 5 THE_OS="Linux" 6 THE_COMP="the clang or else GNU C++" 7- RELEASE_CFLAGS='-O3' 8+ RELEASE_CFLAGS='-fstack-protector -D_FORTIFY_SOURCE=2 -O3 -Wl,-z,relro,-z,now -s' 9- RELEASE_CXXFLAGS='-O3' 10+ RELEASE_CXXFLAGS='-fstack-protector -D_FORTIFY_SOURCE=2 -O3 -Wl,-z,relro,-z,now -s' 11 DEBUG_CFLAGS='-g' 12 DEBUG_CXXFLAGS='-g' 13