From cde79a805e673b21bd2aa2fc916975f423f8ccf6 Mon Sep 17 00:00:00 2001
From: seyko <seyko2@gmail.com>
Date: Wed, 25 Mar 2015 13:26:11 +0300
Subject: [PATCH] fix a bug #43984: tcc -run reports errno=2

    The following program (errno.c) reports errno=2 when run
    using "tcc -run errno.c"

    #include <errno.h>
    #include <stdio.h>
    int main(void) { printf("errno=%d\n", errno); return 0; }
---
 tccrun.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tccrun.c b/tccrun.c
index 8f7257d7..8e53a70e 100644
--- a/tccrun.c
+++ b/tccrun.c
@@ -127,6 +127,7 @@ LIBTCCAPI int tcc_run(TCCState *s1, int argc, char **argv)
         for (i=0; i<argc; ++i)
             bound_new_region(argv[i], strlen(argv[i]));
 
+	errno = 0; /* clean errno value */
         ret = (*prog_main)(argc, argv);
 
         /* unmark argv area */
@@ -137,7 +138,10 @@ LIBTCCAPI int tcc_run(TCCState *s1, int argc, char **argv)
         bound_exit();
     } else
 #endif
+    {
+	errno = 0; /* clean errno value */
         ret = (*prog_main)(argc, argv);
+    }
     return ret;
 }