latest SUSE Tumbleweed/gcc 14.2 c99 -O2 test.c
returns: c99: invalid option -- '2' cc -O2 test.c returns successfull according to https://linux.die.net/man/1/c99 the -O2 option should work c99 is used in an older build system and that didn't work due to the -O2 problem
