[PATCH 2/2] m4: provide additional pkg-config macros

[Luca Barbato]

On 29/04/12 22:28, Tollef Fog Heen wrote:
> ]] Luca Barbato 
> 
>> Macros to prepare a --with-variable-prefix triggered check for module.
> 
> These lack documentation, and what's a --with-variable-prefix triggered
> check?  It needs a better name.

I copypasted the first line of the documentation. variable-prefix is one
of the arguments.

> (I'm not opposed to this in principle, but I'd like to see the docs
> explaining properly what the point is.)

The set of macros let you declare optional support for libraries
providing pkg-config using a compact macro instead the usual boilerplate
to have --with-libfoo:

AC_ARG_WITH(with_arg,
     AS_HELP_STRING(--with-libfoo, enable libfoo support[
@<:@default=]no[@:>@]),,
    [with_libfoo=no])

followed by some logic around a PKG_CHECK_MODULES
AS_CASE([$with_libfoo]),
	[yes],[PKG_CHECK_MODULES(....)],
	[auto],[...]

and the usual way to set HAVE_LIBFOO

AS_IF([test "$with_libfoo" = "yes"],
      [AC_DEFINE([HAVE_LIBFOO], 1, [Enable libfoo support])])

And such.

I hope that explains better what the macros do.

lu

-- 

Luca Barbato
Gentoo/linux
http://dev.gentoo.org/~lu_zero