[Bugs] [Bug 1508947] glusterfs: Include path in pkgconfig file is wrong

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1508947



--- Comment #2 from Worker Ant <bugzilla-bot at gluster.org> ---
COMMIT: https://review.gluster.org/18576 committed in master by  

------------- *.pc: Fix include path in Cflags

The include path in glusterfs-api.pc looks like

  -I${includedir}/glusterfs

However, client code will include the glusterfs headers using

  #include <glusterfs/api/glfs.h>

rather than

  #include <api/glfs.h>

which makes the "/glusterfs" part entirely unnecessary.

More importantly, on some platforms such as FreeBSD, the header files
for glusterfs will be installed in /usr/local/include, which is *not*
part of the compiler's default include path, so compilation will fail
with something like

  fatal error: 'glusterfs/api/glfs.h' file not found
  #include <glusterfs/api/glfs.h>
           ^~~~~~~~~~~~~~~~~~~~~~

The fix is to simply drop the extra "/glusterfs". The same change
is applied to other *.pc files as well, althought I haven't actually
tested those.

A test program (gfapi-load-volfile) and the glfsxmp example
application were using the wrong include paths, so they had to be
fixed as well.

Change-Id: I9a16de47fee7ab9c12d1cb823bbe061a69352670
BUG: 1508947
Signed-off-by: Andrea Bolognani <abologna at redhat.com>

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