Re: Autoconf bug when compiling galeon 1.2.8

[Akim Demaille]

| Hi, 
| I got the following when running configure to compile galeon 1.2.8. 
| I'm using RedHat 8 with a lot of Rawhide RPMS and an X 4.3 snapshot, so
| that might be the problem. If you need more context or have any
| questions, please ask. Whatever the case, I'm just doing what I've been
| told. :)
| 
| checking X11/extensions/Xinerama.h usability... no
| checking X11/extensions/Xinerama.h presence... yes
| configure: WARNING: X11/extensions/Xinerama.h: present but cannot be
| compiled
| configure: WARNING: X11/extensions/Xinerama.h: check for missing
| prerequisite he
| aders?
| configure: WARNING: X11/extensions/Xinerama.h: proceeding with the
| preprocessor'
| s result
| configure: WARNING:     ## ------------------------------------ ##
| configure: WARNING:     ## Report this to address@hidden ##
| configure: WARNING:     ## ------------------------------------ ##
| checking for X11/extensions/Xinerama.h... yes
| 
| -Mike Sassak
| 
| 
| 
| 

Please, report this to the package maintainers, as it's a configure.ac
problem.  The Autoconf 2.57 doc says:

      Previous versions of Autoconf merely checked whether the header was
   accepted by the preprocessor.  This was changed because the old test was
   inappropriate for typical uses.  Headers are typically used to compile,
   not merely to preprocess, and the old behavior sometimes accepted
   headers that clashed at compile-time.  If you need to check whether a
   header is preprocessable, you can use `AC_PREPROC_IFELSE' (*note
   Running the Preprocessor::).
   
      This scheme, which improves the robustness of the test, also requires
   that you make sure that headers that must be included before the
   HEADER-FILE be part of the INCLUDES, (*note Default Includes::).  If
   looking for `bar.h', which requires that `foo.h' be included before if
   it exists, we suggest the following scheme:
   
   
   AC_CHECK_HEADERS([foo.h])
   AC_CHECK_HEADERS([bar.h], [], [],
   [#if HAVE_FOO_H
   # include <foo.h>
   # endif
   ])

Thanks!