getline: Update regarding AIX.

[gnulib.git] / m4 / nanosleep.m4

diff --git a/m4/nanosleep.m4 b/m4/nanosleep.m4
index 8780921..e336f35 100644 (file)
--- a/m4/nanosleep.m4
+++ b/m4/nanosleep.m4
@@ -1,12 +1,11 @@
-#serial 24
+# serial 31

 
 dnl From Jim Meyering.
 dnl Check for the nanosleep function.
 dnl If not found, use the supplied replacement.
 dnl
 
 
 dnl From Jim Meyering.
 dnl Check for the nanosleep function.
 dnl If not found, use the supplied replacement.
 dnl
 

-# Copyright (C) 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008
-# Free Software Foundation, Inc.
+# Copyright (C) 1999-2001, 2003-2010 Free Software Foundation, Inc.

 
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,


@@ -18,98 +17,116 @@ AC_DEFUN([gl_FUNC_NANOSLEEP],
  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
 
  AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS])
  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
 
  AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS])

- AC_REQUIRE([gl_CLOCK_TIME])
- AC_CHECK_HEADERS_ONCE(sys/time.h)
+ AC_CHECK_HEADERS_ONCE([sys/time.h])
+ AC_REQUIRE([gl_FUNC_SELECT])

 
  nanosleep_save_libs=$LIBS
 
  # Solaris 2.5.1 needs -lposix4 to get the nanosleep function.
  # Solaris 7 prefers the library name -lrt to the obsolescent name -lposix4.
 
  nanosleep_save_libs=$LIBS
 
  # Solaris 2.5.1 needs -lposix4 to get the nanosleep function.
  # Solaris 7 prefers the library name -lrt to the obsolescent name -lposix4.

+ LIB_NANOSLEEP=
+ AC_SUBST([LIB_NANOSLEEP])

  AC_SEARCH_LIBS([nanosleep], [rt posix4],
                 [test "$ac_cv_search_nanosleep" = "none required" ||
  AC_SEARCH_LIBS([nanosleep], [rt posix4],
                 [test "$ac_cv_search_nanosleep" = "none required" ||

-                LIB_NANOSLEEP=$ac_cv_search_nanosleep])
+                 LIB_NANOSLEEP=$ac_cv_search_nanosleep])
+ if test "x$ac_cv_search_nanosleep" != xno; then
+   dnl The system has a nanosleep function.

 
 

- AC_CACHE_CHECK([for working nanosleep],
-  [gl_cv_func_nanosleep],
-  [
-   AC_RUN_IFELSE(
-     [AC_LANG_SOURCE([[
-       #include <errno.h>
-       #include <limits.h>
-       #include <signal.h>
-       #if HAVE_SYS_TIME_H
-        #include <sys/time.h>
-       #endif
-       #include <time.h>
-       #include <unistd.h>
-       #define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
-       #define TYPE_MAXIMUM(t) \
-         ((t) (! TYPE_SIGNED (t) \
-               ? (t) -1 \
-               : ~ (~ (t) 0 << (sizeof (t) * CHAR_BIT - 1))))
+   AC_REQUIRE([gl_MULTIARCH])
+   if test $APPLE_UNIVERSAL_BUILD = 1; then
+     # A universal build on Apple MacOS X platforms.
+     # The test result would be 'no (mishandles large arguments)' in 64-bit
+     # mode but 'yes' in 32-bit mode. But we need a configuration result that
+     # is valid in both modes.
+     gl_cv_func_nanosleep='no (mishandles large arguments)'
+   fi

 
 

-       static void
-       check_for_SIGALRM (int sig)
-       {
-         if (sig != SIGALRM)
-           _exit (1);
-       }
+   AC_CACHE_CHECK([for working nanosleep],
+    [gl_cv_func_nanosleep],
+    [
+     AC_RUN_IFELSE(
+       [AC_LANG_SOURCE([[
+          #include <errno.h>
+          #include <limits.h>
+          #include <signal.h>
+          #if HAVE_SYS_TIME_H
+           #include <sys/time.h>
+          #endif
+          #include <time.h>
+          #include <unistd.h>
+          #define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
+          #define TYPE_MAXIMUM(t) \
+            ((t) (! TYPE_SIGNED (t) \
+                  ? (t) -1 \
+                  : ~ (~ (t) 0 << (sizeof (t) * CHAR_BIT - 1))))

 
 

-       int
-       main ()
-       {
-         static struct timespec ts_sleep;
-         static struct timespec ts_remaining;
-         static struct sigaction act;
-         if (! nanosleep)
-           return 1;
-         act.sa_handler = check_for_SIGALRM;
-         sigemptyset (&act.sa_mask);
-         sigaction (SIGALRM, &act, NULL);
-         ts_sleep.tv_sec = 0;
-         ts_sleep.tv_nsec = 1;
-         alarm (1);
-         if (nanosleep (&ts_sleep, NULL) != 0)
-           return 1;
-         ts_sleep.tv_sec = TYPE_MAXIMUM (time_t);
-         ts_sleep.tv_nsec = 999999999;
-         alarm (1);
-         if (nanosleep (&ts_sleep, &ts_remaining) == -1 && errno == EINTR
-             && TYPE_MAXIMUM (time_t) - 10 < ts_remaining.tv_sec)
-           return 0;
-         return 119;
-       }]])],
-     [gl_cv_func_nanosleep=yes],
-     [case $? in dnl (
-      119) gl_cv_func_nanosleep='no (mishandles large arguments)';; dnl (
-      *)   gl_cv_func_nanosleep=no;;
-      esac],
-     [gl_cv_func_nanosleep=cross-compiling])
-  ])
-  if test "$gl_cv_func_nanosleep" = yes; then
-    REPLACE_NANOSLEEP=0
-  else
-    REPLACE_NANOSLEEP=1
-    if test "$gl_cv_func_nanosleep" = 'no (mishandles large arguments)'; then
-      AC_DEFINE([HAVE_BUG_BIG_NANOSLEEP], 1,
-       [Define to 1 if nanosleep mishandles large arguments.])
-      for ac_lib in $LIB_CLOCK_GETTIME; do
-       case " $LIB_NANOSLEEP " in
-       *" $ac_lib "*) ;;
-       *) LIB_NANOSLEEP="$LIB_NANOSLEEP $ac_lib";;
-       esac
-      done
-    fi
-    AC_LIBOBJ(nanosleep)
-    gl_PREREQ_NANOSLEEP
-  fi
+          static void
+          check_for_SIGALRM (int sig)
+          {
+            if (sig != SIGALRM)
+              _exit (1);
+          }

 
 

- AC_SUBST([LIB_NANOSLEEP])
+          int
+          main ()
+          {
+            static struct timespec ts_sleep;
+            static struct timespec ts_remaining;
+            static struct sigaction act;
+            if (! nanosleep)
+              return 1;
+            act.sa_handler = check_for_SIGALRM;
+            sigemptyset (&act.sa_mask);
+            sigaction (SIGALRM, &act, NULL);
+            ts_sleep.tv_sec = 0;
+            ts_sleep.tv_nsec = 1;
+            alarm (1);
+            if (nanosleep (&ts_sleep, NULL) != 0)
+              return 1;
+            ts_sleep.tv_sec = TYPE_MAXIMUM (time_t);
+            ts_sleep.tv_nsec = 999999999;
+            alarm (1);
+            if (nanosleep (&ts_sleep, &ts_remaining) == -1 && errno == EINTR
+                && TYPE_MAXIMUM (time_t) - 10 < ts_remaining.tv_sec)
+              return 0;
+            return 119;
+          }]])],
+       [gl_cv_func_nanosleep=yes],
+       [case $? in dnl (
+        119) gl_cv_func_nanosleep='no (mishandles large arguments)';; dnl (
+        *)   gl_cv_func_nanosleep=no;;
+        esac],
+       [gl_cv_func_nanosleep=cross-compiling])
+    ])
+   if test "$gl_cv_func_nanosleep" = yes; then
+     REPLACE_NANOSLEEP=0
+   else
+     REPLACE_NANOSLEEP=1
+     if test "$gl_cv_func_nanosleep" = 'no (mishandles large arguments)'; then
+       AC_DEFINE([HAVE_BUG_BIG_NANOSLEEP], [1],
+         [Define to 1 if nanosleep mishandles large arguments.])
+     else
+       for ac_lib in $LIBSOCKET; do
+         case " $LIB_NANOSLEEP " in
+         *" $ac_lib "*) ;;
+         *) LIB_NANOSLEEP="$LIB_NANOSLEEP $ac_lib";;
+         esac
+       done
+     fi
+   fi
+ else
+   HAVE_NANOSLEEP=0
+ fi

  LIBS=$nanosleep_save_libs
  LIBS=$nanosleep_save_libs

+ if test $HAVE_NANOSLEEP = 0 || test $REPLACE_NANOSLEEP = 1; then
+   AC_LIBOBJ([nanosleep])
+   gl_PREREQ_NANOSLEEP
+ fi

 ])
 
 # Prerequisites of lib/nanosleep.c.
 AC_DEFUN([gl_PREREQ_NANOSLEEP],
 [
 ])
 
 # Prerequisites of lib/nanosleep.c.
 AC_DEFUN([gl_PREREQ_NANOSLEEP],
 [

-  AC_CHECK_HEADERS_ONCE(sys/select.h)
+  AC_CHECK_HEADERS_ONCE([sys/select.h])
+  gl_PREREQ_SIG_HANDLER_H

 ])
 ])