Dogcows Code - chaz/openbox/blob - m4/gl.m4

   1 # X11_DEVEL()
   2 #
   3 # Check for the presence of the X Window System headers and libraries.
   4 # Sets the CPPFLAGS and LIBS variables as appropriate.
   5 AC_DEFUN([GL_OPTION],
   6 [
   7   AC_REQUIRE([X11_DEVEL])
   8
   9   AC_ARG_ENABLE(gl, [  --enable-gl             enable support for OpenGL rendering default=no],
  10                 ,[enable_gl="no"])
  11
  12   # Store these
  13   OLDLIBS=$LIBS
  14   OLDCPPFLAGS=$CPPFLAGS
  15
  16   if test "$enable_gl" = "yes"; then
  17     AC_CHECK_LIB([GL], [glXGetConfig],
  18                  ,
  19                  [
  20                    enable_gl="no"
  21                    AC_MSG_WARN([Disabling GL rendering support])
  22                  ])
  23   fi
  24
  25   if test "$enable_gl" = "yes"; then
  26     CPPFLAGS="$CPPFLAGS $X_CFLAGS"
  27     LIBS="$LIBS $X_PRE_LIBS $X_LIBS $X_EXTRA_LIBS"
  28
  29     AC_MSG_CHECKING([if we can compile with GL])
  30     AC_TRY_LINK(
  31     [
  32       #include <GL/gl.h>
  33     ],
  34     [
  35       GLfloat f = 0.0;
  36       glVertex3f(f, f, f);
  37     ],
  38     [
  39       AC_MSG_RESULT([yes])
  40     ],
  41     [
  42       AC_MSG_RESULT([no])
  43       AC_MSG_WARN([Disabling GL rendering support])
  44       enable_gl="no"
  45     ])
  46
  47     GL_CFLAGS=""
  48     GL_LIBS="-lGL"
  49     AC_SUBST(GL_CFLAGS)
  50     AC_SUBST(GL_LIBS)
  51   fi
  52
  53   CPPFLAGS=$OLDCPPFLAGS
  54   LIBS=$OLDLIBS
  55
  56   AC_MSG_CHECKING([if GL support is enabled])
  57   if test "$enable_gl" = "yes"; then
  58     AC_MSG_RESULT([yes])
  59
  60     AC_DEFINE(USE_GL)
  61   else
  62     AC_MSG_RESULT([no])
  63   fi
  64   AM_CONDITIONAL([USE_GL], [test "$enable_gl" = "yes"])
  65 ])