Configure cleanup.

2011-11-09  Janne Blomqvist  <jb@gcc.gnu.org>

	* configure.ac (AC_STDC_HEADERS): Remove.
	(AC_HEADER_TIME): Remove.
	(AC_HAVE_HEADERS, AC_CHECK_HEADERS): Move into a single invocation
	of AC_CHECK_HEADERS_ONCE, don't check for presence of C89 headers.
	(AC_CHECK_MEMBERS): Use single invocation.
	(AC_CHECK_FUNCS): Move into single invocation of
	AC_CHEC_FUNCS_ONCE, don't check for presence of C89 functions.
	* config.h.in: Regenerate.
	* configure: Regenerate.
	* intrinsics/clock.c: Include time.h.
	(mclock): Assume clock() is present.
	(mclock8): Likewise.
	* intrinsics/ctime.c (strctime): Assume strftime is present.
	(fdate): Assume time() is present.
	(fdate_sub): Likewise.
	(ctime): Likewise.
	* intrinsics/date_and_time.c: Don't provide abs macro.
	(HAVE_NO_DATE_TIME): Remove code related to macro which is never
	set.
	* intrinsics/execute_command_line.c: Assume stdlib.h is present.
	* intrinsics/exit.c: Likewise.
	* intrinsics/extends_type_of.c: Likewise.
	* intrinsics/gerror.c: Assume strerror() is present.
	* intrinsics/kill.c: Assume signal.h is present.
	* intrinsics/malloc.c: Assume stdlib.h is present.
	* intrinsics/move_alloc.c: Likewise.
	* intrinsics/perror.c: Assume perror() is present.
	* intrinsics/signal.c: Assume signal.h is present.
	* intrinsics/stat.c: Assume stdlib.h is present.
	* intrinsics/system.c: Likewise.
	* intrinsics/time.c: Include time.h, assume time() is present.
	* intrinsics/time_1.h: Conditionally include sys/time.h,
	unconditionally time.h.
	(gf_cputime): Do division in double, fallback using clock().
	(gf_gettime): Assume time() is present.
	* intrinsics/umask.c: Assume stdlib.h is present.
	* runtime/backtrace.c: Likewise.
	* runtime/compile_options.c: Assume signal.h is present, assume
	C89 signals are present.
	* runtime/error.c: Assume signal.h and stdlib.h are present.

From-SVN: r181227

1 files changed, 6 insertions, 20 deletions

diff --git a/libgfortran/intrinsics/signal.c b/libgfortran/intrinsics/signal.c
index 66e54f3..85179ee 100644
--- a/libgfortran/intrinsics/signal.c
+++ b/libgfortran/intrinsics/signal.c
@@ -1,8 +1,8 @@
 /* Implementation of the SIGNAL and ALARM g77 intrinsics
-   Copyright (C) 2005, 2007, 2009 Free Software Foundation, Inc.
+   Copyright (C) 2005, 2007, 2009, 2011 Free Software Foundation, Inc.
    Contributed by François-Xavier Coudert <coudert@clipper.ens.fr>
 
-This file is part of the GNU Fortran 95 runtime library (libgfortran).
+This file is part of the GNU Fortran runtime library (libgfortran).
 
 Libgfortran is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public
@@ -29,9 +29,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #include <unistd.h>
 #endif
 
-#ifdef HAVE_SIGNAL_H
 #include <signal.h>
-#endif
 
 #ifdef HAVE_INTTYPES_H
 #include <inttypes.h>
@@ -46,7 +44,6 @@ iexport_proto(signal_sub);
 void
 signal_sub (int *number, void (*handler)(int), int *status)
 {
-#ifdef HAVE_SIGNAL
   intptr_t ret;
 
   if (status != NULL)
@@ -56,11 +53,6 @@ signal_sub (int *number, void (*handler)(int), int *status)
     }
   else
     signal (*number, handler);
-#else
-  errno = ENOSYS;
-  if (status != NULL)
-    *status = -1;
-#endif
 }
 iexport(signal_sub);
 
@@ -72,7 +64,6 @@ iexport_proto(signal_sub_int);
 void
 signal_sub_int (int *number, int *handler, int *status)
 {
-#ifdef HAVE_SIGNAL
   intptr_t ptr = *handler, ret;
 
   if (status != NULL)
@@ -82,11 +73,6 @@ signal_sub_int (int *number, int *handler, int *status)
     }
   else
     signal (*number, (void (*)(int)) ptr);
-#else
-  errno = ENOSYS;
-  if (status != NULL)
-    *status = -1;
-#endif
 }
 iexport(signal_sub_int);
 
@@ -129,7 +115,7 @@ alarm_sub_i4 (int * seconds __attribute__ ((unused)),
 	      void (*handler)(int) __attribute__ ((unused)),
 	      GFC_INTEGER_4 *status)
 {
-#if defined (SIGALRM) && defined (HAVE_ALARM) && defined (HAVE_SIGNAL)
+#if defined (SIGALRM) && defined (HAVE_ALARM) 
   if (status != NULL)
     {
       if (signal (SIGALRM, handler) == SIG_ERR)
@@ -159,7 +145,7 @@ alarm_sub_i8 (int *seconds __attribute__ ((unused)),
 	      void (*handler)(int) __attribute__ ((unused)),
 	      GFC_INTEGER_8 *status)
 {
-#if defined (SIGALRM) && defined (HAVE_ALARM) && defined (HAVE_SIGNAL)
+#if defined (SIGALRM) && defined (HAVE_ALARM)
   if (status != NULL)
     {
       if (signal (SIGALRM, handler) == SIG_ERR)
@@ -190,7 +176,7 @@ alarm_sub_int_i4 (int *seconds __attribute__ ((unused)),
 		  int *handler __attribute__ ((unused)),
 		  GFC_INTEGER_4 *status)
 {
-#if defined (SIGALRM) && defined (HAVE_ALARM) && defined (HAVE_SIGNAL)
+#if defined (SIGALRM) && defined (HAVE_ALARM)
   if (status != NULL)
     {
       if (signal (SIGALRM, (void (*)(int)) (intptr_t) *handler) == SIG_ERR)
@@ -220,7 +206,7 @@ alarm_sub_int_i8 (int *seconds __attribute__ ((unused)),
 		  int *handler __attribute__ ((unused)),
 		  GFC_INTEGER_8 *status)
 {
-#if defined (SIGALRM) && defined (HAVE_ALARM) && defined (HAVE_SIGNAL)
+#if defined (SIGALRM) && defined (HAVE_ALARM)
   if (status != NULL)
     {
       if (signal (SIGALRM, (void (*)(int)) (intptr_t) *handler) == SIG_ERR)