configure.in (errno): Check for declaration.

	* configure.in (errno): Check for declaration.
	* configure, config.in: Regenerated.

	* system.h (errno): Only declare if not already done.

From-SVN: r41305

gcc/ChangeLog

+2001-04-12  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
+
+	* configure.in (errno): Check for declaration.
+	* configure, config.in: Regenerated.
+
+	* system.h (errno): Only declare if not already done.
+
 2001-04-12  Alexandre Oliva  <aoliva@redhat.com>
 
 	* recog.c (general_operand, immediate_operand,

gcc/config.in

@@ -396,6 +396,9 @@
 #undef HAVE_DECL_ENVIRON
 
 /* Define to 1 if we found this declaration otherwise define to 0. */
+#undef HAVE_DECL_ERRNO
+
+/* Define to 1 if we found this declaration otherwise define to 0. */
 #undef HAVE_DECL_MALLOC
 
 /* Define to 1 if we found this declaration otherwise define to 0. */

gcc/configure.in

@@ -590,7 +590,7 @@ AC_FUNC_MMAP_FILE
 saved_CFLAGS="$CFLAGS"
 CFLAGS="$CFLAGS -I${srcdir} -I${srcdir}/../include"
 gcc_AC_CHECK_DECLS(getenv atol sbrk abort atof getcwd getwd \
-	strsignal putc_unlocked fputs_unlocked strstr environ \
+	strsignal putc_unlocked fputs_unlocked strstr environ errno \
 	malloc realloc calloc free basename getopt, , ,[
 #include "ansidecl.h"
 #include "system.h"])

gcc/system.h

@@ -93,7 +93,7 @@ extern int fputs_unlocked PARAMS ((const char *, FILE *));
 
 #include <errno.h>
 
-#ifndef errno
+#if !defined (errno) && defined (HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
 extern int errno;
 #endif