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Re: Handling getopt for option without optional argument value
From: |
Greg Wooledge |
Subject: |
Re: Handling getopt for option without optional argument value |
Date: |
Fri, 23 Jul 2021 14:43:40 -0400 |
On Fri, Jul 23, 2021 at 08:26:26PM +0200, lisa-asket@perso.be wrote:
> Could not the people at gcc help a little bit?
GCC and its utilities use the -findopts option style. This extends
even to their wrapper scripts, like "c89", which was actually one of
the first GNU shell programs that I found. I didn't include it in my
previous message because it doesn't have what I would consider to be
"nontrivial option parsing".
The "-xyz to -x -y -z" unrolling that getopt does is fundamentally
incompatible with the -findopts option style. There's no way to tell
whether -bar is meant to be one option, or three options. So, it wouldn't
make sense for GCC's scripts to use getopt or getopts.
Here is the entire /usr/bin/c89 script from my Debian installation:
#! /bin/sh
# Call the appropriate C compiler with options to accept ANSI/ISO C
# The following options are the same (as of gcc-2.95):
# -ansi
# -std=c89
# -std=iso9899:1990
extra_flag=-std=c89
for i; do
case "$i" in
-ansi|-std=c89|-std=iso9899:1990)
extra_flag=
;;
-std=*)
echo >&2 "`basename $0` called with non ANSI/ISO C option $i"
exit 1
;;
esac
done
exec gcc $extra_flag ${1+"$@"}
- Re: Handling getopt for option without optional argument value, (continued)
Handling getopt for option without optional argument value, lisa-asket, 2021/07/23
- Re: Handling getopt for option without optional argument value, Greg Wooledge, 2021/07/23
- Handling getopt for option without optional argument value, lisa-asket, 2021/07/23
- Re: Handling getopt for option without optional argument value, Greg Wooledge, 2021/07/23
- Handling getopt for option without optional argument value, lisa-asket, 2021/07/23
- Re: Handling getopt for option without optional argument value,
Greg Wooledge <=
- Re: Handling getopt for option without optional argument value, Dennis Williamson, 2021/07/23
- Handling getopt for option without optional argument value, lisa-asket, 2021/07/23
- Handling getopt for option without optional argument value, lisa-asket, 2021/07/23
- Re: Handling getopt for option without optional argument value, Lawrence Velázquez, 2021/07/23
- Handling getopt for option without optional argument value, lisa-asket, 2021/07/23
- Re: Handling getopt for option without optional argument value, Greg Wooledge, 2021/07/23
- Handling getopt for option without optional argument value, lisa-asket, 2021/07/23
- Re: Handling getopt for option without optional argument value, Greg Wooledge, 2021/07/24
- Re: Handling getopt for option without optional argument value, Chet Ramey, 2021/07/24
- Re: Handling getopt for option without optional argument value, Chris Elvidge, 2021/07/24