Compilation will not work if the header is missing, so make sure
it is present and compilable first. This can highligh sooner if
a user forgot to install the corresponding dev package.
Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
Took the opportunity to rewrite the check using autoconf macros
to generate a more compatible configure script.
Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
This attribute for functions was not standard until recently, so
there are a few different possible syntax. With this patch, the
configure script will search for the proper syntax, and define what
is needed to have the attribute compile correctly.
Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
- according to the automake manual, `acinclude.m4' is the old style
of doing stuff, putting local macros in their own directory is the
way to go, so move acincluce.m4 to m4/windowmaker.m4
- reflect this in autogen.sh and Makefile.am
- while there, add a `conditionally set cflags' macro from the
autoconf macro archive
- use this to slightly pump warning levels up if we are on gcc
