Re: C Compiler dependency-file generation

[autoconf]

On Fri, May 18, 2001 at 11:40:51AM -0400, Jeff Dubrule wrote:
> Is there currently an accepted mechanism for determining whether a C
> compiler is going to be able to generate dependencies the way automake
> likes?

I think you'll lose with CVS automake which I think supports more than
GCC for auto-dependency generation (check out lib/depcomp in the
automake CVS tree). Anyway, why not automake with --include-deps and
be done with it?

> I'm currently using this function def in my acinclude.m4 file:
> 
> AC_DEFUN(AC_PROG_CC_DEPENDENCIES, [
>   AC_CACHE_CHECK(
>      [whether the C compilers($CC $CFLAGS $LDFLAGS) can generate 
> dependencies],
>      cc_does_dependencies, [
>     AC_LANG_SAVE
>     AC_LANG_C
>     OLDCFLAGS="$CFLAGS"
>     CFLAGS="$CFLAGS -Wp,-MD,foo.pp"
>     AC_TRY_COMPILE(,[], cc_does_dependencies=yes, cc_does_dependencies=no)
>     CFLAGS="$OLDCFLAGS"
>     AC_LANG_RESTORE
>     CC_DOES_DEPENDENCIES=$cc_does_dependencies
>     AC_SUBST(CC_DOES_DEPENDENCIES)
>   ])
> ])
> 
> Is there a better way?  Should something like this go into autoconf?

-- 
albert chin (address@hidden)