[GRASS5] Autoconf and Cygwin - X11

[Mike Thomas]

Hi all.

On Cygwin, autoconf generates a configure script which doesn't find the X11
libs and headers in their default location "/usr/X11r6" (note the small r).

A patch to partially solve this problem (searches for certain utility
libraries such as OpenGL and PNG) is below.

I say partially because the script still fails to find X itself, which means
that XINCPATH and XLIBPATH need to be manually edited in the head file:
----------------------------------------------------------------------------
--
...
checking how to run the C preprocessor... (cached) gcc -E
checking for X... (cached) no
checking for ANSI C header files... (cached) yes
...
----------------------------------------------------------------------------
--

Unfortunately I don't know yet how autoconf looks for X - it seems to be the
AC_PATH_XTRA line in configure.in.

Cheers

Mike Thomas.

Index: configure.in
===================================================================
RCS file: /home/grass/grassrepository/grass/configure.in,v
retrieving revision 1.54
diff -r1.54 configure.in
215,216c215,216
< my_inc_dirs="/usr/include /usr/local/include /usr/X11R6/include
/opt/include /usr/freeware/include"
< my_lib_dirs="/usr/lib /usr/local/lib /usr/X11R6/lib /opt/lib
/usr/freeware/lib"
---
> my_inc_dirs="/usr/include /usr/local/include /usr/X11R6/include
/usr/X11r6/include /opt/include /usr/freeware/include"
> my_lib_dirs="/usr/lib /usr/local/lib /usr/X11R6/lib /usr/X11r6/lib
/opt/lib /usr/freeware/lib"
828c828,829
<     /usr/X11R6/include /usr/X11R6/include/GL /opt/Mesa/include"
---
>     /usr/X11R6/include /usr/X11R6/include/GL \
>     /usr/X11r6/include /usr/X11r6/include/GL /opt/Mesa/include"
857c858
<     /usr/local/Mesa/lib /usr/X11R6/lib /usr/local/X11/lib \
---
>     /usr/local/Mesa/lib /usr/X11R6/lib /usr/X11r6/lib /usr/local/X11/lib \



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