Remove extern errno declarations.

* xterm.c:
* xrdb.c:
* w32term.c:
* unexec.c:
* unexaix.c:
* sysdep.c:
* process.c:
* lread.c:
* keyboard.c:
* floatfns.c:
* filelock.c:
* fileio.c:
* emacs.c (main):
* ecrt0.c:
* dispnew.c:
* callproc.c:
* buffer.c: Remove errno extern declarations.
* s/netbsd.h (NEED_ERRNO): Remove.

* movemail.c:
* etags.c:
* emacsclient.c: Remove extern errno declarations.

19 files changed, 23 insertions, 66 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 08c40c6048c..cd8eac76a3a 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,25 @@
+2010-04-02  Dan Nicolaescu  <dann@ics.uci.edu>
+
+	Remove extern errno declarations.
+	* xterm.c:
+	* xrdb.c:
+	* w32term.c:
+	* unexec.c:
+	* unexaix.c:
+	* sysdep.c:
+	* process.c:
+	* lread.c:
+	* keyboard.c:
+	* floatfns.c:
+	* filelock.c:
+	* fileio.c:
+	* emacs.c (main):
+	* ecrt0.c:
+	* dispnew.c:
+	* callproc.c:
+	* buffer.c: Remove errno extern declarations.
+	* s/netbsd.h (NEED_ERRNO): Remove.
+
 2010-04-01  Dan Nicolaescu  <dann@ics.uci.edu>
 
 	Remove all uses of LIBX11_SYSTEM.
diff --git a/src/buffer.c b/src/buffer.c
index 0c6e57d45be..9035a986b4c 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -28,11 +28,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #include <stdio.h>
 #include <setjmp.h>
 
-#ifndef USE_CRT_DLL
-extern int errno;
-#endif
-
-
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
 #endif
@@ -4627,7 +4622,6 @@ buffer_slot_type_mismatch (newval, type)
 #endif
 
 #include <stdio.h>
-#include <errno.h>
 
 #if MAP_ANON == 0
 #include <fcntl.h>
diff --git a/src/callproc.c b/src/callproc.c
index bed3302e508..378c647f385 100644
--- a/src/callproc.c
+++ b/src/callproc.c
@@ -25,10 +25,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #include <stdio.h>
 #include <setjmp.h>
 
-#ifndef USE_CRT_DLL
-extern int errno;
-#endif
-
 /* Define SIGCHLD as an alias for SIGCLD.  */
 
 #if !defined (SIGCHLD) && defined (SIGCLD)
@@ -61,7 +57,6 @@ extern int errno;
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <sys/param.h>
-#include <errno.h>
 #endif /* MSDOS */
 
 #ifndef O_RDONLY
diff --git a/src/dispnew.c b/src/dispnew.c
index 52d7f38728f..2be00c9c3b0 100644
--- a/src/dispnew.c
+++ b/src/dispnew.c
@@ -5809,9 +5809,6 @@ window_change_signal (signalnum) /* If we don't have an argument, */
      int signalnum;		/* some compilers complain in signal calls.  */
 {
   int width, height;
-#ifndef USE_CRT_DLL
-  extern int errno;
-#endif
   int old_errno = errno;
 
   struct tty_display_info *tty;
diff --git a/src/ecrt0.c b/src/ecrt0.c
index 7dbbd6c5ef1..40549884935 100644
--- a/src/ecrt0.c
+++ b/src/ecrt0.c
@@ -59,10 +59,6 @@ And always:
 
 int data_start = 0;
 
-#ifdef NEED_ERRNO
-int errno;
-#endif
-
 #ifndef MSDOS
 char **environ;
 #endif
diff --git a/src/emacs.c b/src/emacs.c
index 0d90776df83..400a6b0e594 100644
--- a/src/emacs.c
+++ b/src/emacs.c
@@ -756,9 +756,6 @@ main (int argc, char **argv)
   char stack_bottom_variable;
   int do_initial_setlocale;
   int skip_args = 0;
-#ifndef USE_CRT_DLL
-  extern int errno;
-#endif
 #ifdef HAVE_SETRLIMIT
   struct rlimit rlim;
 #endif
diff --git a/src/fileio.c b/src/fileio.c
index 4ae74de5c67..c62d5724eff 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -53,12 +53,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #include <ctype.h>
 #include <errno.h>
 
-#ifndef vax11c
-#ifndef USE_CRT_DLL
-extern int errno;
-#endif
-#endif
-
 #include "lisp.h"
 #include "intervals.h"
 #include "buffer.h"
diff --git a/src/filelock.c b/src/filelock.c
index 7c69ea954fc..b11338c58b6 100644
--- a/src/filelock.c
+++ b/src/filelock.c
@@ -47,9 +47,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #endif /* __FreeBSD__ */
 
 #include <errno.h>
-#ifndef errno
-extern int errno;
-#endif
 
 #include "lisp.h"
 #include "buffer.h"
diff --git a/src/floatfns.c b/src/floatfns.c
index 97d9ec00aae..3f7030b7605 100644
--- a/src/floatfns.c
+++ b/src/floatfns.c
@@ -99,10 +99,6 @@ extern double logb ();
 
 #ifdef FLOAT_CHECK_ERRNO
 # include <errno.h>
-
-#ifndef USE_CRT_DLL
-extern int errno;
-#endif
 #endif
 
 #ifdef FLOAT_CATCH_SIGILL
diff --git a/src/keyboard.c b/src/keyboard.c
index 3cd042fb21e..f2aeff89542 100644
--- a/src/keyboard.c
+++ b/src/keyboard.c
@@ -79,10 +79,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #include "nsterm.h"
 #endif
 
-#ifndef USE_CRT_DLL
-extern int errno;
-#endif
-
 /* Variables for blockinput.h: */
 
 /* Non-zero if interrupt input is blocked right now.  */
diff --git a/src/lread.c b/src/lread.c
index 90edca90a16..83ebc8b3b10 100644
--- a/src/lread.c
+++ b/src/lread.c
@@ -73,10 +73,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #define file_tell ftell
 #endif
 
-#ifndef USE_CRT_DLL
-extern int errno;
-#endif
-
 /* hash table read constants */
 Lisp_Object Qhash_table, Qdata;
 Lisp_Object Qtest, Qsize;
diff --git a/src/process.c b/src/process.c
index 43fa78c7bd4..3c539024b0a 100644
--- a/src/process.c
+++ b/src/process.c
@@ -195,10 +195,6 @@ extern int serial_open (char *port);
 extern void serial_configure (struct Lisp_Process *p, Lisp_Object contact);
 #endif
 
-#ifndef USE_CRT_DLL
-extern int errno;
-#endif
-
 #ifndef HAVE_H_ERRNO
 extern int h_errno;
 #endif
diff --git a/src/s/netbsd.h b/src/s/netbsd.h
index 5552aece50a..682b9482352 100644
--- a/src/s/netbsd.h
+++ b/src/s/netbsd.h
@@ -28,8 +28,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #define LIBS_TERMCAP -ltermcap
 
-#define NEED_ERRNO
-
 #define START_FILES pre-crt0.o /usr/lib/crt0.o START_FILES_1 /usr/lib/crtbegin.o
 #define LIB_STANDARD -lgcc -lc -lgcc /usr/lib/crtend.o END_FILES_1
 #undef LIB_GCC
diff --git a/src/sysdep.c b/src/sysdep.c
index 71b2a0f461b..37e7dfbaf9c 100644
--- a/src/sysdep.c
+++ b/src/sysdep.c
@@ -94,12 +94,6 @@ extern int etext;
 extern unsigned start __asm__ ("start");
 #endif
 
-#ifndef USE_CRT_DLL
-#ifndef errno
-extern int errno;
-#endif
-#endif
-
 #include <sys/file.h>
 
 #ifdef HAVE_FCNTL_H
diff --git a/src/unexaix.c b/src/unexaix.c
index 97b69d7e5c7..2657d144296 100644
--- a/src/unexaix.c
+++ b/src/unexaix.c
@@ -435,7 +435,6 @@ write_segment (int new, char *ptr, char *end)
 {
   int i, nwrite, ret;
   char buf[80];
-  extern int errno;
   char zeros[UnexBlockSz];
 
   for (i = 0; ptr < end;)
diff --git a/src/unexec.c b/src/unexec.c
index 6cb27b35c36..1a27db1232d 100644
--- a/src/unexec.c
+++ b/src/unexec.c
@@ -466,9 +466,6 @@ write_segment (new, ptr, end)
 {
   register int i, nwrite, ret;
   char buf[80];
-#ifndef USE_CRT_DLL
-  extern int errno;
-#endif
   /* This is the normal amount to write at once.
      It is the size of block that NFS uses.  */
   int writesize = 1 << 13;
diff --git a/src/w32term.c b/src/w32term.c
index 4ed7beda233..7222e26efd2 100644
--- a/src/w32term.c
+++ b/src/w32term.c
@@ -228,10 +228,6 @@ static int input_signal_count;
 
 extern Lisp_Object Vcommand_line_args, Vsystem_name;
 
-#ifndef USE_CRT_DLL
-extern int errno;
-#endif
-
 /* A mask of extra modifier bits to put into every keyboard char.  */
 extern EMACS_INT extra_keyboard_modifiers;
 
diff --git a/src/xrdb.c b/src/xrdb.c
index c8cb55cb7b8..7808bacc59f 100644
--- a/src/xrdb.c
+++ b/src/xrdb.c
@@ -28,6 +28,7 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #include <unistd.h>
 #endif
 
+#include <errno.h>
 #include <epaths.h>
 
 #include <stdio.h>
@@ -734,8 +735,6 @@ fatal (msg, prog, x1, x2, x3, x4, x5)
     char *msg, *prog;
     int x1, x2, x3, x4, x5;
 {
-    extern int errno;
-
     if (errno)
       perror (prog);
 
diff --git a/src/xterm.c b/src/xterm.c
index 1114fcccc53..90db15d9ed4 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -309,8 +309,6 @@ extern Lisp_Object Vx_no_window_manager;
 
 extern Lisp_Object Qeql;
 
-extern int errno;
-
 /* A mask of extra modifier bits to put into every keyboard char.  */
 
 extern EMACS_INT extra_keyboard_modifiers;