opengl check

diff --git a/m4/opengl.m4 b/m4/opengl.m4
new file mode 100644 (file)
index 0000000..c942d95
--- /dev/null
+++ b/m4/opengl.m4
@@ -0,0 +1,55 @@
+AC_DEFUN([RFX_CHECK_OPENGL],
+[
+OLDCPPFLAGS="${CPPFLAGS}"
+OLDLIBS="${LIBS}"
+       
+AC_CHECK_LIB(GL, glBegin)
+AC_CHECK_LIB(GLU, gluBeginSurface)
+AC_CHECK_LIB(glut, glutInit)
+AC_CHECK_HEADERS(GL/gl.h GL/glut.h)
+
+cat > conftest.c << EOF
+#include <GL/gl.h>
+#include <GL/glu.h>
+#include <GL/glut.h>
+
+int main(int argc, char*argv[])
+{
+    glutInit(&argc, argv);
+    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
+    glutInitWindowSize(320,200);
+    glutInitWindowPosition(0,0);
+    glutCreateWindow("main");
+    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+    glShadeModel(GL_SMOOTH);
+    glEnable (GL_LINE_SMOOTH);
+    glEnable (GL_POLYGON_SMOOTH);
+    glEnable (GL_BLEND);
+    glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+    glHint (GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
+    glHint (GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
+}
+EOF
+
+AC_MSG_CHECKING([whether we can compile the opengl test program])
+
+ac_link='$CC $CPPFLAGS $CFLAGS conftest.c $LDFLAGS $LIBS -o conftest${ac_exeext}'
+if { (eval echo opengl.m4:71: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+    AC_MSG_RESULT(yes)
+    HAVE_OPENGL=1
+    AC_DEFINE([HAVE_OPENGL], [1], [Defined if opengl is available])
+else
+    echo "configure: failed program was:" >&5
+    cat conftest.c >&5
+    HAVE_OPENGL=0
+    AC_MSG_RESULT(no)
+fi
+rm -f conftest*
+
+# if the above didn't work out, reset all changes to the compiler variables.
+if test "x${HAVE_OPENGL}" "!=" "x1"; then 
+    CPPFLAGS=$OLDCPPFLAGS
+    LIBS=$OLDLIBS
+fi 
+])
+