[Bug-gnubg] Autoconf problems

[Philippe Michel]

I have problems with autoconf (this is on freebsd 6.1) that seem related 
to the changes from Dec 6th (configure.in rel.1.155).

First, configure doesn't find libpng. It looks for "libpng" with 
pkg-config, but there is only "libpng12". The patch below suppress the 
problem for me. This may not be the right way to fix it though. For 
instance, cairo (original dist., without freebsd patches), that depends on 
libpng as well, has something like :

# libpng13 is GnuWin32's libpng-1.2.8 :-(
for l in libpng12 libpng13 libpng10 ; do
  if $PKG_CONFIG --exists $l ; then
etc...

*** configure.in.dist   Tue Dec 19 20:22:54 2006
--- configure.in        Tue Dec 19 21:43:36 2006
***************
*** 102,108 ****
  PKG_CHECK_MODULES(GLIB, [glib-2.0 >= 2.6.0], , [AC_MSG_ERROR("You need to have 
glib2 to compile GNU backgammon")])
  PKG_CHECK_MODULES(LIBXML2, libxml-2.0, AC_DEFINE(HAVE_LIBXML2,1,Define if you 
want to use libxml2 to parse XML.), [])
  PKG_CHECK_MODULES(FREETYPE2, [freetype2], AC_DEFINE(HAVE_FREETYPE, 1, Define 
if you have freetype2), [])
! PKG_CHECK_MODULES(LIBPNG, [libpng], AC_DEFINE(HAVE_LIBPNG, 1, Define if you 
have libpng), [])

  dnl
  dnl Checks for libraries.
--- 102,114 ----
  PKG_CHECK_MODULES(GLIB, [glib-2.0 >= 2.6.0], , [AC_MSG_ERROR("You need to have 
glib2 to compile GNU backgammon")])
  PKG_CHECK_MODULES(LIBXML2, libxml-2.0, AC_DEFINE(HAVE_LIBXML2,1,Define if you 
want to use libxml2 to parse XML.), [])
  PKG_CHECK_MODULES(FREETYPE2, [freetype2], AC_DEFINE(HAVE_FREETYPE, 1, Define 
if you have freetype2), [])
! for l in libpng libpng12; do
!     if pkg-config --exists $l ; then
!        png_rel=$l
!        break
!     fi
! done
! PKG_CHECK_MODULES(LIBPNG, [$png_rel], AC_DEFINE(HAVE_LIBPNG, 1, Define if you 
have libpng), [])

  dnl
  dnl Checks for libraries.


Another problem is that ./configure --without-python fails with :

configure: error: conditional "PYTHON_USE" was never defined.
Usually this means the macro was only invoked conditionally.