On Fri, 2004-12-31 at 07:48 +0200, dkouroun@xxxxxxxxx wrote:
>
> Hi all!
> I am reading the autoconf manual and I
> try to understand where AC_CHECK_HEADERS
> searches to find the headers.
>
> ***Yes it does search. But WHERE and how can I change the
> default search location???***
The "default" is whatever your compiler knows about. The normal way to
add to this is to add -I flags to CPPFLAGS:
$ ./configure CPPFLAGS="-I/your/include/dir"
You can, of course, modify the CPPFLAGS variable in configure.ac before
invoking the AC_CHECK_HEADERS macro. But you should not do that
arbitrarily.
> I have problems running configure
> and stuff like that in my FreeBSD.
> While it is working fine under SuSE
> it cannot find GL/glut.h in checkheaders
> AC_CHECK_HEADERS(GL/glut,, e.t.c)
>
> in Linux it can find it easily!
> It is located in /usr/include/GL/glut.h
> In FreeBSD it is located in
> /usr/X11R6/include/GL/glut.h
I suspect the AC_PATH_XTRA macro would help you; among other things it
does, it should make available whatever -I flags you need for X11
headers in the X_CFLAGS output variable.
It sounds like you might benefit even more from the GL detection macros
I contributed to the Autoconf Macro Archive:
<http://www.gnu.org/software/ac-archive/htmldoc/ax_check_gl.html>
<http://www.gnu.org/software/ac-archive/htmldoc/ax_check_glu.html>
<http://www.gnu.org/software/ac-archive/htmldoc/ax_check_glut.html>
> Can you please help me with that?
> Can anybody give me a sample configure.in for the following
> case where I:
>
>
> 1:) want to include some system libraries which are
> not in the same directories for different OS.
> e.g. Suppose I use FreeBSD and Linux but
> the opengl libraries are located in different
> directories. What macros should I add in configure
> such it searches for that libraries and when it finds
> them it automatically adds -L/dir/ -llib1, -llib2...
>
> 2:) how can I do the same for headeer files?
You can look at the implementation of AC_PATH_X and AC_PATH_XTRA. The
machinations there are not pretty. Fortunately, there is usually a
Better Way.
--
Braden McDaniel e-mail: <braden@xxxxxxxxxxxxx>
<http://endoframe.com> Jabber: <braden@xxxxxxxxxx>
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