diff '--color=auto' -Nurd ftmenu-0.4.0/configure.ac ftmenu-0.4.0.new/configure.ac
--- ftmenu-0.4.0/configure.ac	2010-04-06 18:02:16.000000000 -0700
+++ ftmenu-0.4.0.new/configure.ac	2025-06-14 20:11:31.095483191 -0700
@@ -10,6 +10,7 @@
 AC_SUBST(GTK_CFLAGS)
 AC_SUBST(GTK_LIBS)
 
+AC_PROG_CC
 AC_PROG_CXX
 AC_PROG_LIBTOOL