Add -lgl and -lm for imgfile. Better way to configure zlib.
diff --git a/Modules/Setup.in b/Modules/Setup.in
index 83e3131..9c9a0dd 100644
--- a/Modules/Setup.in
+++ b/Modules/Setup.in
@@ -214,8 +214,7 @@
# This module requires the header file
# /usr/people/4Dgifts/iristools/include/izoom.h:
-
-#imgfile imgfile.c -limage -lgutil # Image Processing Utilities
+#imgfile imgfile.c -limage -lgutil -lgl -lm # Image Processing Utilities
# These modules require the Multimedia Development Option (I think):
@@ -345,11 +344,8 @@
#fpetest fpetestmodule.c
# Andrew Kuchling's zlib module.
-# This require zlib 1.0.4. See http://quest.jpl.nasa.gov/zlib/
-# Edit the ZLIBHOME variable to point to the place where you built zlib.
-# If you installed libzlib.a, replace the last argument with -lz
-#ZLIBHOME=..
-#zlib zlibmodule.c -I$(ZLIBHOME) -L$(ZLIBHOME) -lz
+# This require zlib 1.0.4 (or later). See http://quest.jpl.nasa.gov/zlib/
+#zlib zlibmodule.c -I$(prefix)/include -L$(exec_prefix)/lib -lz
# Example -- included for reference only: