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Re: How to cache $CFLAGS, $LIBS etc.
- X-seq: zsh-workers 12595
- From: "Bart Schaefer" <schaefer@xxxxxxxxxxxxxxxxxxxxxxx>
- To: Peter Stephenson <pws@xxxxxxx>, zsh-workers@xxxxxxxxxxxxxx (Zsh hackers list)
- Subject: Re: How to cache $CFLAGS, $LIBS etc.
- Date: Fri, 11 Aug 2000 16:16:10 +0000
- In-reply-to: <0FZ400K4WL6P0H@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
- Mailing-list: contact zsh-workers-help@xxxxxxxxxxxxxx; run by ezmlm
- References: <0FZ400K4WL6P0H@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
On Aug 11, 12:28pm, Peter Stephenson wrote:
} Subject: How to cache $CFLAGS, $LIBS etc.
}
} 2. Use `--enable-cflags', `--enable-libs', `--enable-ldflags' or whatever.
} This probably ought to work because the arguments are remembered for use
} with --recheck.
I've done this with configure in other packages; it works fine.
} But the guide for how configure is used is pretty fascistic about not
} allowing anything RMS wouldn't like, so I don't know if there are
} drawbacks to this.
Zsh isn't a GNU package, so I'm not especially concerned about RMS's
blood pressure.
} Plus we need to be careful if people supply
} environment variables in the standard way.
It actually all works pretty well as long as you don't try to use both
the environment variables and the --enable flags in the same configure
(with different values). The --enable flags always win.
If you use environment variables or make-command-line variables to change
the CFLAGS at make time, they'll correctly override the --enable settings
for the actual build, but not for any tests run within an automatic re-
configure. If that's a problem we can most likely rewrite the Makefile.in
to force the appropriate --enable options to be passed to config.status;
e.g.
config.status --recheck --enable-cflags='$(CFLAGS)' ...
However, I've never yet found this to be an issue. If the new value of,
say, LIBS would result in a different configuration output, chances are
you should have run configure directly in the first place.
} Does anyone know how to do this properly?
This is lifted (and edited to change the name) from another acinclude.m4
that I wrote:
AC_DEFUN([zsh_compile_flags],
[AC_ARG_ENABLE(cflags,
[ --enable-cflags=... specify C compiler flags],
if test "$enableval" = "yes"
then CFLAGS="$1"
else CFLAGS="$enable_cflags"
fi)
[AC_ARG_ENABLE(ldflags,
[ --enable-ldflags=... specify linker flags],
if test "$enableval" = "yes"
then LDFLAGS="$1"
else LDFLAGS="$enable_ldflags"
fi)])
Add any others that you want, stick it in aczsh.m4, etc., you know the
drill.
--
Bart Schaefer Brass Lantern Enterprises
http://www.well.com/user/barts http://www.brasslantern.com
Zsh: http://www.zsh.org | PHPerl Project: http://phperl.sourceforge.net
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