X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/27b0ffea3e94600ddb0e4066cce525a49789da8e..3e6656f9ab66ae7e629f8e5d5b41810bf070f09d:/src/system.h

diff --git a/src/system.h b/src/system.h
index 3dcd007b..e297f608 100644
--- a/src/system.h
+++ b/src/system.h
@@ -18,7 +18,7 @@
 #ifndef BISON_SYSTEM_H
 #define BISON_SYSTEM_H
 
-#ifdef HAVE_CONFIG_H
+#if HAVE_CONFIG_H
 # include <config.h>
 #endif
 
@@ -79,10 +79,6 @@ char *alloca ();
 #endif /* not STDC_HEADERS and not HAVE_STRING_H */
 
 #include <errno.h>
-#ifndef errno
-extern int errno;
-#endif
-
 #include <limits.h>
 
 # include "xalloc.h"
@@ -103,27 +99,27 @@ extern int time_report;
 | Missing prototypes.  |
 `---------------------*/
 
-#if !HAVE_DECL_STPCPY
+#if defined HAVE_DECL_STPCPY && !HAVE_DECL_STPCPY
 char *stpcpy (char *dest, const char *src);
 #endif
 
-#if !HAVE_DECL_STRCHR
+#if defined HAVE_DECL_STRCHR && !HAVE_DECL_STRCHR
 char *strchr (const char *s, int c);
 #endif
 
-#if !HAVE_DECL_STRSPN
+#if defined HAVE_DECL_STRSPN && !HAVE_DECL_STRSPN
 size_t strspn (const char *s, const char *accept);
 #endif
 
-#if !HAVE_DECL_STRNLEN
+#if defined HAVE_DECL_STRNLEN && !HAVE_DECL_STRNLEN
 size_t strnlen (const char *s, size_t maxlen);
 #endif
 
-#if !HAVE_DECL_MEMCHR
+#if defined HAVE_DECL_MEMCHR && !HAVE_DECL_MEMCHR
 void *memchr (const void *s, int c, size_t n);
 #endif
 
-#if !HAVE_DECL_MEMRCHR
+#if defined HAVE_DECL_MEMRCHR && !HAVE_DECL_MEMRCHR
 void *memrchr (const void *s, int c, size_t n);
 #endif
 
@@ -133,6 +129,14 @@ void *memrchr (const void *s, int c, size_t n);
 | GCC extensions.  |
 `-----------------*/
 
+/* Use this to suppress gcc's `...may be used before initialized'
+   warnings.  */
+#ifdef lint
+# define IF_LINT(Code) Code
+#else
+# define IF_LINT(Code) /* empty */
+#endif
+
 #ifndef __attribute__
 /* This feature is available in gcc versions 2.5 and later.  */
 # if !defined (__GNUC__) || __GNUC__ < 2 || \
@@ -160,10 +164,10 @@ void *memrchr (const void *s, int c, size_t n);
 | NLS.  |
 `------*/
 
-#ifdef HAVE_LOCALE_H
+#if HAVE_LOCALE_H
 # include <locale.h>
 #endif
-#ifndef HAVE_SETLOCALE
+#if !HAVE_SETLOCALE
 # define setlocale(Category, Locale)
 #endif