From 4d6faca615d3d000a0974e8e9ad3755817cd7654 Mon Sep 17 00:00:00 2001
From: Michael R Sweet <michael.r.sweet@gmail.com>
Date: Thu, 8 Feb 2007 15:44:28 +0000
Subject: Add support for glutGetProcAddress() on Mac OS X and other platforms
 via dlsym() (STR #1582)

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.1@5673 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
---
 src/glut_compatability.cxx | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'src')

diff --git a/src/glut_compatability.cxx b/src/glut_compatability.cxx
index 7b8832f43..47079905d 100644
--- a/src/glut_compatability.cxx
+++ b/src/glut_compatability.cxx
@@ -43,6 +43,9 @@
 #    define GLX_GLXEXT_LEGACY
 #    include <GL/glx.h>
 #  endif // HAVE_GLXGETPROCADDRESSARB
+#  ifdef HAVE_DLSYM
+#    include <dlfcn.h>
+#  endif // HAVE_DLSYM
 #  define MAXWINDOWS 32
 static Fl_Glut_Window *windows[MAXWINDOWS+1];
 
@@ -439,8 +442,17 @@ int glutDeviceGet(GLenum type) {
 GLUTproc glutGetProcAddress(const char *procName) {
 #  ifdef WIN32
   return (GLUTproc)wglGetProcAddress((LPCSTR)procName);
+
+#  elif defined(HAVE_DLSYM)
+  char symbol[1024];
+
+  snprintf(symbol, sizeof(symbol), "_%s", procName);
+
+  return (GLUTproc)dlsym(RTLD_DEFAULT, symbol);
+
 #  elif defined(HAVE_GLXGETPROCADDRESSARB)
   return (GLUTproc)glXGetProcAddressARB((const GLubyte *)procName);
+
 #  else
   return (GLUTproc)0;
 #  endif // WIN32
-- 
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