Package: gcc Version: 4:8.3.0-1 Severity: minor POSIX has option '-O <optlevel>' for c99(1) command, which means 'c99 -O 1 ...' should be exactly same as 'c99 -O1 ...'; however it is not in c99-gcc(1):
$ ls -l /etc/alternatives/c99 lrwxrwxrwx 1 root root 16 Sep 14 17:12 /etc/alternatives/c99 -> /usr/bin/c99-gcc $ c99 -O1 hello.c $ c99 -O 1 hello.c gcc: error: 1: No such file or directory See https://pubs.opengroup.org/onlinepubs/9699919799/utilities/c99.html -- System Information: Debian Release: 10.7 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'stable') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 4.19.147-rivoreo-amd64 (SMP w/32 CPU cores) Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE=C.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) Versions of packages gcc depends on: ii cpp 4:8.3.0-1 ii gcc-8 8.3.0-6 Versions of packages gcc recommends: ii libc6-dev [libc-dev] 2.28-10 Versions of packages gcc suggests: ii autoconf 2.69-11 ii automake 1:1.16.1-4 ii bison 2:3.3.2.dfsg-1 ii flex 2.6.4-6.2 pn gcc-doc <none> pn gcc-multilib <none> ii gdb 8.2.1-2+b3 ii libtool 2.4.6-9 ii make 4.2.1-1.2 ii manpages-dev 4.16-2 -- no debconf information