ls installed
+Mac OS X which for ls
+ls installed
+Mac OS X which for doesnt-exist
+m4(): generating 'tmp/test' from 'tmp/test.m4' with options '-DTEST=m4'
+###################################
+# WARNING! DO NOT EDIT THIS FILE! #
+###################################
+
+
+Simple test file for m4.
+ m4
+m4(): generating 'tmp/test-multiple' from 'tmp/test-multiple.m4' with options '-DFIRST=first -DSECOND=second'
+###################################
+# WARNING! DO NOT EDIT THIS FILE! #
+###################################
+
+
+Test with multiple arguments passed to m4.
+first: first
+second: second
+