Add support for IRIX; tested on IRIX 6.5.18 with an Infinite Reality 3

git-svn-id: https://glew.svn.sourceforge.net/svnroot/glew/trunk/glew@82 783a27ee-832a-0410-bc00-9f386506c6dd

Makefile

@@ -80,7 +80,7 @@ ifeq ($(patsubst IRIX%,IRIX,$(SYSTEM)), IRIX)
 CC = cc
 EXTRA_CCFLAGS = 
 EXTRA_LDFALGS =
-EXTRA_CPPFLAGS =
+EXTRA_CPPFLAGS = -DGLEW_NEEDS_CUSTOM_GET_PROCADDRESS=1 -DGLEW_OPENGL_LIB_PATH=\"libGL.so\"
 NAME = GLEW
 P.BIN =
 WARN = -fullwarn

auto/src/glew_pre.c

@@ -34,10 +34,44 @@
 #include <GL/glxew.h>
 
 #ifdef _WIN32
-#define glewGetProcAddress(name) wglGetProcAddress(name)
+#  define glewGetProcAddress(name) wglGetProcAddress(name)
 #else
-#define glewGetProcAddress(name) (*glXGetProcAddressARB)(name)
-#endif
+#  ifdef GLEW_NEEDS_CUSTOM_GET_PROCADDRESS
+#    define glewGetProcAddress(name) __dlopenGetProcAddress(name)
+#  else
+#    define glewGetProcAddress(name) (*glXGetProcAddressARB)(name)
+#  endif /* GLEW_NEEDS_CUSTOM_GET_PROCADDRESS */
+#endif /* _WIN32 */
+
+#ifdef GLEW_NEEDS_CUSTOM_GET_PROCADDRESS
+#include <dlfcn.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static void * __dlopenGetProcAddress(const GLubyte *procName)
+{
+    static void *h = NULL;
+    static void *gpa;
+
+    if (!h)
+    {
+        if (!(h = dlopen(GLEW_OPENGL_LIB_PATH, RTLD_LAZY | RTLD_LOCAL)))
+        {
+            fprintf(stderr,
+                    "E: GLEW failed to dlopen %s: %s.\nAbort.\n",
+                    GLEW_OPENGL_LIB_PATH, dlerror());
+            exit(100);
+        }
+
+        gpa = dlsym(h, "glXGetProcAddress");
+    }
+
+    if (gpa != NULL)
+        return ((void* (*)(const GLubyte*))gpa)(procName);
+    else
+        return dlsym(h, (const char *)procName);
+}
+#endif /* GLEW_NEEDS_CUSTOM_GET_PROCADDRESS */
 
 /* ----------------------------- GL_VERSION_1_1 ---------------------------- */