Merge branch 'php/8.1' into php/8.2

compile.sh

@@ -428,11 +428,12 @@ if [ "$DO_OPTIMIZE" != "no" ]; then
 		CFLAGS="$CFLAGS $GENERIC_CFLAGS"
 	fi
 	#clang does not understand the following and will fail
-	GCC_CFLAGS="$CFLAGS -funsafe-loop-optimizations -fpredictive-commoning -ftracer -ftree-loop-im -frename-registers -fcx-limited-range -ftree-parallelize-loops=4"
+	GCC_CFLAGS="$CFLAGS -funsafe-loop-optimizations -fpredictive-commoning -ftracer -ftree-loop-im -frename-registers -fcx-limited-range"
 	$CC $CFLAGS $GCC_CFLAGS -o test test.c >> "$DIR/install.log" 2>&1
 	if [ $? -eq 0 ]; then
 		CFLAGS="$CFLAGS $GCC_CFLAGS"
 	fi
+	#TODO: -ftree-parallelize-loops requires OpenMP - not sure if it will provide meaningful improvements yet
 fi
 
 if [ "$FSANITIZE_OPTIONS" != "" ]; then