Specify CFLAGS.

maint/mctest

@@ -5,6 +5,14 @@
 
 set -e
 
+# Specify which warnings we want to see.
+# Don't add options that produce massive warnings.
+# Add -Wstrict-prototypes after main.h is fixed (always use cpanel).
+# Maybe add -W if a better way to initialize quick dialogs is found.
+export CFLAGS="-O2 -Wall -Wno-unused-parameter -Wno-sign-compare \
+ -Wmissing-declarations -Wmissing-prototypes -Wbad-function-cast \
+ -Wcast-align -Wpointer-arith -Wredundant-decls -Wundef -Wfloat-equal"
+
 echo "Checking the documentation"
 maint/doctest