emacs-build: new CFLAGS to improve stability

emacs-build.sh

@@ -444,10 +444,11 @@ emacs_build_install_dir="$emacs_build_root/pkg"
 emacs_build_zip_dir="$emacs_build_root/zips"
 emacs_strip_executables="no"
 
-CFLAGS="-Ofast -fno-finite-math-only \
-        -fassociative-math -fno-signed-zeros -frename-registers -funroll-loops \
-        -fomit-frame-pointer \
-        -fallow-store-data-races  -fno-semantic-interposition -floop-parallelize-all -ftree-parallelize-loops=4"
+# CFLAGS="-Ofast -fno-finite-math-only \
+#         -fassociative-math -fno-signed-zeros -frename-registers -funroll-loops \
+#         -fomit-frame-pointer \
+#         -fallow-store-data-races  -fno-semantic-interposition -floop-parallelize-all -ftree-parallelize-loops=4"
+CFLAGS="-O2 -fno-semantic-interposition -floop-parallelize-all -ftree-parallelize-loops=4"
 
 while test -n "$*"; do
     case $1 in