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

   1 # GL_DEVEL()
   2 #
   3 # Check for the presence of OpenGL development headers and libraries.
   4 # Sets the GL_CFLAGS and GL_LIBS variables as appropriate.
   5 AC_DEFUN([GL_DEVEL],
   6 [
   7   AC_REQUIRE([X11_DEVEL])
   8
   9   # Store these
  10   OLDLIBS=$LIBS
  11   OLDCPPFLAGS=$CPPFLAGS
  12
  13   AC_CHECK_LIB([GL], [glXGetConfig],
  14                ,
  15                [
  16                  AC_MSG_ERROR([A valid libGL could not be found.])
  17                ])
  18
  19   CPPFLAGS="$CPPFLAGS $X_CFLAGS"
  20   LIBS="$LIBS $X_PRE_LIBS $X_LIBS $X_EXTRA_LIBS"
  21
  22   AC_MSG_CHECKING([if we can compile with GL])
  23   AC_TRY_LINK(
  24   [
  25     #include <GL/gl.h>
  26   ],
  27   [
  28     GLfloat f = 0.0;
  29     glVertex3f(f, f, f);
  30   ],
  31   [
  32     AC_MSG_RESULT([yes])
  33   ],
  34   [
  35     AC_MSG_RESULT([no])
  36     AC_MSG_ERROR([Could not compile against GL])
  37   ])
  38
  39   GL_CFLAGS=""
  40   GL_LIBS="-lGL"
  41   AC_SUBST(GL_CFLAGS)
  42   AC_SUBST(GL_LIBS)
  43
  44   CPPFLAGS=$OLDCPPFLAGS
  45   LIBS=$OLDLIBS
  46 ])