dnl FTGL_CHECK_GL()
dnl Check for OpenGL development environment and GLU >= 1.2
dnl
AC_DEFUN([FTGL_CHECK_GL],
[dnl
AC_CHECK_HEADER([GL/gl.h])
AC_CHECK_LIB(GL, [glBegin],
[], [AC_MSG_ERROR([libGL is required to compile this library])])
AC_CHECK_HEADER([GL/glu.h])
AC_MSG_CHECKING([for GLU version >= 1.2])
AC_TRY_COMPILE([#include <GL/glu.h>], [
#if !defined(GLU_VERSION_1_2)
#error GLU too old
#endif
],
[AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])
AC_MSG_ERROR([GLU >= 1.2 is needed to compile this library])
])
AC_CHECK_LIB(GLU, [gluNewTess],
[], [AC_MSG_ERROR([libGLU is required to compile this library])])
])
