strtoumax: fix typo in previous commit.

[gnulib.git] / m4 / usleep.m4

diff --git a/m4/usleep.m4 b/m4/usleep.m4
index c8e6911..e430672 100644 (file)
--- a/m4/usleep.m4
+++ b/m4/usleep.m4
@@ -1,5 +1,5 @@
-# usleep.m4 serial 1
-dnl Copyright (C) 2009 Free Software Foundation, Inc.
+# usleep.m4 serial 3
+dnl Copyright (C) 2009-2013 Free Software Foundation, Inc.

 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.


@@ -12,13 +12,13 @@ AC_DEFUN([gl_FUNC_USLEEP],
   dnl usleep was required in POSIX 2001, but dropped as obsolete in
   dnl POSIX 2008; therefore, it is not always exposed in headers.
   AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
   dnl usleep was required in POSIX 2001, but dropped as obsolete in
   dnl POSIX 2008; therefore, it is not always exposed in headers.
   AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])

+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles

   AC_CHECK_FUNCS_ONCE([usleep])
   AC_CHECK_TYPE([useconds_t], [],
     [AC_DEFINE([useconds_t], [unsigned int], [Define to an unsigned 32-bit
       type if <sys/types.h> lacks this type.])])
   if test $ac_cv_func_usleep = no; then
     HAVE_USLEEP=0
   AC_CHECK_FUNCS_ONCE([usleep])
   AC_CHECK_TYPE([useconds_t], [],
     [AC_DEFINE([useconds_t], [unsigned int], [Define to an unsigned 32-bit
       type if <sys/types.h> lacks this type.])])
   if test $ac_cv_func_usleep = no; then
     HAVE_USLEEP=0

-    AC_LIBOBJ([usleep])

   else
     dnl POSIX allows implementations to reject arguments larger than
     dnl 999999, but GNU guarantees it will work.
   else
     dnl POSIX allows implementations to reject arguments larger than
     dnl 999999, but GNU guarantees it will work.


@@ -28,10 +28,18 @@ AC_DEFUN([gl_FUNC_USLEEP],
 #include <unistd.h>
 ]], [[return !!usleep (1000000);]])],
         [gl_cv_func_usleep_works=yes], [gl_cv_func_usleep_works=no],
 #include <unistd.h>
 ]], [[return !!usleep (1000000);]])],
         [gl_cv_func_usleep_works=yes], [gl_cv_func_usleep_works=no],

-        [gl_cv_func_usleep_works="guessing no"])])
-    if test "$gl_cv_func_usleep_works" != yes; then
-      REPLACE_USLEEP=1
-      AC_LIBOBJ([usleep])
-    fi
+        [case "$host_os" in
+                   # Guess yes on glibc systems.
+           *-gnu*) gl_cv_func_usleep_works="guessing yes" ;;
+                   # If we don't know, assume the worst.
+           *)      gl_cv_func_usleep_works="guessing no" ;;
+         esac
+        ])])
+    case "$gl_cv_func_usleep_works" in
+      *yes) ;;
+      *)
+        REPLACE_USLEEP=1
+        ;;
+    esac

   fi
 ])
   fi
 ])