adds imlib2-support to fluxbox: allows us to load several imageformats

besides xpm. to get imlib2 support in fluxbox one has to 
 
  ./configure --enable-imblib2

default is disabled.  a fluxbox-binary that supports imlib2 will have 
IMLIB2 in "fluxbox -info"-output

explanation to the changed files:

 * xft.m4 -> acinclude.m4 + added ac_path_generic.m4 
   (from http://ac-archive.sourceforge.net/Miscellaneous/ac_path_generic.html)

 * configure.in, Makefile.am, src/FbTk/Makefile.am changed to handle
   imlib2-support

 * Font.cc/hh Image.cc/hh App.cc fluxbox.cc consistent way of init for global
   stuff for fonts and imagehandlers.

 * rest of changes just add the imlib2-code, pretty straightforward

1 files changed, 26 insertions, 0 deletions

diff --git a/configure.in b/configure.in
index d03429e..5fd74a9 100644
--- a/configure.in
+++ b/configure.in
@@ -426,6 +426,32 @@ AC_ARG_ENABLE(
 
 AM_CONDITIONAL(XPM, test x$XPM = xtrue)
 
+IMLIB2=false
+AC_MSG_CHECKING([whether to have Imlib2 (pixmap themes) support])
+AC_ARG_ENABLE(imlib2,
+[  --enable-imlib2         Imlib2 (pixmap themes) support [default=no]])
+
+if test "x$enableval" = "xyes"; then
+        AC_MSG_RESULT([yes])
+        AC_PATH_GENERIC(imlib2, 1.0.0,
+     [
+         IMLIB2=true
+         AC_DEFINE(HAVE_IMLIB2, [], [Imlib2 support])
+         IMLIB2_LIBS=`imlib2-config --libs`
+         IMLIB2_CFLAGS=`imlib2-config --cflags`
+         LIBS="$LIBS $IMLIB2_LIBS"
+         CXXFLAGS="$CXXFLAGS $IMLIB2_CFLAGS"
+         ],
+         [
+           AC_MSG_RESULT(no)
+         ])
+else
+        AC_MSG_RESULT([no])
+fi
+
+AM_CONDITIONAL(IMLIB2, test x$IMLIB2 = xtrue)
+
+
 AC_MSG_CHECKING([whether to have Xmb (multibyte font, utf-8) support])
 AC_ARG_ENABLE(
   xmb,