[! HAVE_STRERROR] (strerror): Define the function.

1 files changed, 15 insertions, 0 deletions

diff --git a/lib-src/env.c b/lib-src/env.c
index 282a94069df..35532e0360d 100644
--- a/lib-src/env.c
+++ b/lib-src/env.c
@@ -333,3 +333,18 @@ myindex (str, c)
     }
   return 0;
 }
+
+#ifndef HAVE_STRERROR
+char *
+strerror (errnum)
+     int errnum;
+{
+  extern char *sys_errlist[];
+  extern int sys_nerr;
+
+  if (errnum >= 0 && errnum < sys_nerr)
+    return sys_errlist[errnum];
+  return (char *) "Unknown error";
+}
+
+#endif /* ! HAVE_STRERROR */