From 28b6e0a01157049b4cb279b0ef25ea9dcf3b46ed Mon Sep 17 00:00:00 2001
From: Adrian Thurston <thurston@colm.net>
Date: Sun, 12 Mar 2023 13:17:42 -0700
Subject: [PATCH] include an extern C function in libfsm so we can use
 AC_CHECK_LIB
 
---
 src/libfsm/codegen.cc | 2 ++
 1 file changed, 2 insertions(+)
 
diff --git a/src/libfsm/codegen.cc b/src/libfsm/codegen.cc
index 21edb5ac..1150384e 100644
--- a/src/libfsm/codegen.cc
+++ b/src/libfsm/codegen.cc
@@ -30,6 +30,8 @@
 #include <assert.h>
 #include <iomanip>
 
+// Convenience: for checking for the presence of the libfsm.
+extern "C" void libfsm_present() {}
 
 using std::ostream;
 using std::ostringstream;
