verify: new macro 'assume'

[gnulib.git] / m4 / mkfifo.m4

diff --git a/m4/mkfifo.m4 b/m4/mkfifo.m4
index cfa2f73..e571c64 100644 (file)
--- a/m4/mkfifo.m4
+++ b/m4/mkfifo.m4
@@ -1,7 +1,7 @@
-# serial 3
+# serial 4
 # See if we need to provide mkfifo replacement.
 
-dnl Copyright (C) 2009-2011 Free Software Foundation, Inc.
+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.
@@ -11,6 +11,7 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_MKFIFO],
 [
   AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
   AC_CHECK_FUNCS_ONCE([mkfifo])
   if test $ac_cv_func_mkfifo = no; then
     HAVE_MKFIFO=0
@@ -37,12 +38,21 @@ AC_DEFUN([gl_FUNC_MKFIFO],
              return result;
            ]])],
          [gl_cv_func_mkfifo_works=yes], [gl_cv_func_mkfifo_works=no],
-         [gl_cv_func_mkfifo_works="guessing no"])
+         [case "$host_os" in
+                    # Guess yes on glibc systems.
+            *-gnu*) gl_cv_func_mkfifo_works="guessing yes" ;;
+                    # If we don't know, assume the worst.
+            *)      gl_cv_func_mkfifo_works="guessing no" ;;
+          esac
+         ])
        rm -f conftest.tmp conftest.lnk])
-    if test "$gl_cv_func_mkfifo_works" != yes; then
-      AC_DEFINE([MKFIFO_TRAILING_SLASH_BUG], [1], [Define to 1 if mkfifo
-        does not reject trailing slash])
-      REPLACE_MKFIFO=1
-    fi
+    case "$gl_cv_func_mkfifo_works" in
+      *yes) ;;
+      *)
+        AC_DEFINE([MKFIFO_TRAILING_SLASH_BUG], [1], [Define to 1 if mkfifo
+          does not reject trailing slash])
+        REPLACE_MKFIFO=1
+        ;;
+    esac
   fi
 ])