On Sun, Jul 30, 2006 at 02:19:50PM +1000, mick wrote:
> On Fri, 14 Jul 2006 18:39, Stepan Kasal wrote:
> I have an application that depends on gtkhtml-2.0, which seems to put its
> headers in a diferent location in almost every linux or BSD distribution so I
> need to replace
> INCLUDES = -I/usr/include/gtkhtml-2.0
> in Makefile.am.
>
> Its been suggested that I use
> AC_CHECK_HEADER ([libgtkhtml/gtkhtml.h],
> [action-if-found],
> [AC_MSG_ERROR([BUMMER, Maybe if you install libgtkhtml-2 & libgtkhtml-2-dev
> this pig will fly])],
> [Macro]
> [includes = 'default-includes'])
> in configure.ac.
> I'm trying to nut it out but getting more confused with every step, I'm
> guessing I need to replace "macro" with something like 'locate gtkhtml.h'
> then some sed? to trim it down.
>
> Have I got that right?
> if locate gtkhtml.h gives
> /usr/include/gtkhtml-2.0/libgtkhtml/gtkhtml.h
> what would clean it up to produce the required string?
That's what pkg-config is for (yes, yet another little tool :-/
Many packages intended to be used as libs come these days with
pkg-config descriptions (*.pc files). libgtkhtml is one of those. For
those, you can say, e.g.
pkg-config gtkhtml-1.1 --cflags
and you get whatever you need to stuff into the compiler command:
-DNEED_GNOMESUPPORT_H -DGTKHTML_HAVE_GCONF -I/usr/include/gtkhtml-1.1 \
-I/usr/include/gdk-pixbuf-1.0 -I/usr/include/gtk-1.2 \
-I/usr/include/glib-1.2 -I/usr/lib/glib/include -I/usr/include/gnome-1.0 \
-I/usr/include/freetype2 -I/usr/lib/gnome-libs/include \
-I/usr/include/gnome-xml -I/usr/include/gal-1.0 \
-I/usr/include/libglade-1.0 -I/usr/include/gconf/1 \
-I/usr/include/orbit-1.0
(yes, it ain't pretty).
So you would first check for the existence of pkg-config (and complain
if not there) and then use it to get the info needed.
HTH
-- tomas
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