defined FLEX_EXIT macro to call longjmp on errors.

1 files changed, 5 insertions, 0 deletions

diff --git a/flexdef.h b/flexdef.h
index 3ecdc53..68457ac 100644
--- a/flexdef.h
+++ b/flexdef.h
@@ -37,6 +37,7 @@
 #include <stdio.h>
 #include <ctype.h>
 #include <limits.h>
+#include <setjmp.h>
 
 #include "config.h"
 
@@ -1053,4 +1054,8 @@ extern struct Buf defs_buf;
 #define OUT_BEGIN_CODE() out_str("#ifndef %sIN_HEADER\n",prefix)
 #define OUT_END_CODE() out_str("#endif /* !%sIN_HEADER */\n",prefix);
 
+/* For setjmp/longjmp (instead of calling exit(2)). Linkage in main.c */
+extern jmp_buf flex_main_jmp_buf;
+#define FLEX_EXIT(status) longjmp(flex_main_jmp_buf,(status)+1)
+
 #endif /* not defined FLEXDEF_H */