X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fnanosleep.m4;h=fd5fd92fc66437e62746c10a87ca8a0d3248d737;hb=ab925242c495050cda536f918ff4d5118798505a;hp=d3d0ef89f532f02146fc6f4f708880754b374f6f;hpb=27ef3b8633ec7b4aba91535ec51c43f39b42a25a;p=gnulib.git

diff --git a/m4/nanosleep.m4 b/m4/nanosleep.m4
index d3d0ef89f..fd5fd92fc 100644
--- a/m4/nanosleep.m4
+++ b/m4/nanosleep.m4
@@ -1,23 +1,26 @@
-#serial 7
+#serial 9
 
 dnl From Jim Meyering.
 dnl Check for the nanosleep function.
 dnl If not found, use the supplied replacement.
 dnl
 
-AC_DEFUN(jm_FUNC_NANOSLEEP,
+AC_DEFUN([jm_FUNC_NANOSLEEP],
 [
  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.
- AC_SEARCH_LIBS(nanosleep, [rt posix4], [LIB_NANOSLEEP=$ac_cv_search_nanosleep])
- AC_SUBST(LIB_NANOSLEEP)
+ AC_SEARCH_LIBS([nanosleep], [rt posix4],
+                [test "$ac_cv_search_nanosleep" = "none required" ||
+	         LIB_NANOSLEEP=$ac_cv_search_nanosleep])
+ AC_SUBST([LIB_NANOSLEEP])
 
  AC_CACHE_CHECK([whether nanosleep works],
   jm_cv_func_nanosleep_works,
   [
    AC_REQUIRE([AC_HEADER_TIME])
+   AC_CHECK_HEADERS_ONCE(sys/time.h)
    AC_TRY_RUN([
 #   if TIME_WITH_SYS_TIME
 #    include <sys/time.h>
@@ -46,9 +49,16 @@ AC_DEFUN(jm_FUNC_NANOSLEEP,
   ])
   if test $jm_cv_func_nanosleep_works = no; then
     AC_LIBOBJ(nanosleep)
-    AC_DEFINE_UNQUOTED(nanosleep, rpl_nanosleep,
+    AC_DEFINE(nanosleep, rpl_nanosleep,
       [Define to rpl_nanosleep if the replacement function should be used.])
+    gl_PREREQ_NANOSLEEP
   fi
 
  LIBS=$nanosleep_save_libs
 ])
+
+# Prerequisites of lib/nanosleep.c.
+AC_DEFUN([gl_PREREQ_NANOSLEEP],
+[
+  AC_CHECK_HEADERS_ONCE(unistd.h)
+])