Darwin: Config/source fixes to now build glxdemo apps and OSMesa
Also added darwin-fat-32bit darwin-fat-all configs and deleted old darwin-x86ppc config
(cherry picked from commit 7120c0089d663a2b7e7b0c97da38f9bc233fbdd7)
diff --git a/configs/darwin b/configs/darwin
index 438abd9..c7f94d2 100644
--- a/configs/darwin
+++ b/configs/darwin
@@ -4,10 +4,9 @@
 
 CONFIG_NAME = darwin
 
-DEFINES = -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_SVID_SOURCE \
-	  -D_BSD_SOURCE -D_GNU_SOURCE \
-	  -DGLX_INDIRECT_RENDERING \
-	  -DPTHREADS -DGLX_ALIAS_UNSUPPORTED -DHAVE_POSIX_MEMALIGN
+DEFINES = -D_DARWIN_C_SOURCE -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L \
+	  -D_SVID_SOURCE -D_BSD_SOURCE -D_GNU_SOURCE \
+	  -DPTHREADS -DGLX_ALIAS_UNSUPPORTED -DGLX_INDIRECT_RENDERING
 
 # Compiler and flags
 CC = gcc
@@ -37,4 +36,5 @@
 APP_LIB_DEPS = -L$(TOP)/lib -l$(GLUT_LIB) -l$(GLU_LIB) -l$(GL_LIB) -L/usr/X11/lib -lX11 -lXmu -lXt -lXi -lm
 
 # omit glw lib for now:
-SRC_DIRS = glx/x11 glu glut/glx
+SRC_DIRS = glx/x11 glu glut/glx mesa
+DRIVER_DIRS = osmesa