diff --git a/m4/opengl.m4 b/m4/opengl.m4 index 582ad43d3acc73754e22aa66638d2c83447984d9..e9c6f92a04693cac286f08b6be65dee51e088b76 100644 --- a/m4/opengl.m4 +++ b/m4/opengl.m4 @@ -4,9 +4,10 @@ dnl AC_DEFUN([ALBERTA_OPENGL_CHECK], [# ALBERTA_OPENGL_CHECK start AC_REQUIRE([ALBERTA_X_WINDOW_SYSTEM]) +AS_IF([test -z "${x_includes}" -a "${OSX}" = true],[OGL_DFLTINCDIR=/usr/X11R6/include],[OGL_DFLTINCDIR=${x_includes}]) ALBERTA_CHECK_PACKAGE([OpenGL],[GL],[glXMakeCurrent], [${x_libraries}],[${X_ALL_LIBS}], - [GL/gl.h],[${x_includes:+${x_includes}} ${includedir} ${oldincludedir}],[${X_CFLAGS}], + [GL/gl.h],[${x_includes:+${x_includes}} ${OGL_DFLTINCDIR} ${includedir} ${oldincludedir}],[${X_CFLAGS}], [optional]) # ALBERTA_OPENGL_CHECK stop ])