--- ./MCONFIG.in.orig	2011-12-11 16:13:52.000000000 -0600
+++ ./MCONFIG.in	2021-01-16 12:55:22.406108324 -0600
@@ -51,7 +51,7 @@
 
 # Compiler and compiler flags
 CC      = @CC@
-CFLAGS  = @CFLAGS@ -I$(SRCROOT)
+CFLAGS  = @CFLAGS@ -I$(SRCROOT) -fcommon
 
 # Link flags
 LDFLAGS = @LDFLAGS@