declare smobs in alloc.c

[bpt/emacs.git] / m4 / symlink.m4

diff --git a/m4/symlink.m4 b/m4/symlink.m4
index 917d5f0..de4924b 100644 (file)
--- a/m4/symlink.m4
+++ b/m4/symlink.m4
@@ -1,7 +1,7 @@
-# serial 4
+# serial 6
 # See if we need to provide symlink replacement.
 
-dnl Copyright (C) 2009-2011 Free Software Foundation, Inc.
+dnl Copyright (C) 2009-2014 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.
@@ -11,13 +11,13 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_SYMLINK],
 [
   AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
   AC_CHECK_FUNCS_ONCE([symlink])
   dnl The best we can do on mingw is provide a dummy that always fails, so
   dnl that compilation can proceed with fewer ifdefs.  On FreeBSD 7.2, AIX 7.1,
   dnl and Solaris 9, we want to fix a bug with trailing slash handling.
   if test $ac_cv_func_symlink = no; then
     HAVE_SYMLINK=0
-    AC_LIBOBJ([symlink])
   else
     AC_CACHE_CHECK([whether symlink handles trailing slash correctly],
       [gl_cv_func_symlink_works],
@@ -35,11 +35,19 @@ AC_DEFUN([gl_FUNC_SYMLINK],
              return result;
            ]])],
          [gl_cv_func_symlink_works=yes], [gl_cv_func_symlink_works=no],
-         [gl_cv_func_symlink_works="guessing no"])
+         [case "$host_os" in
+                    # Guess yes on glibc systems.
+            *-gnu*) gl_cv_func_symlink_works="guessing yes" ;;
+                    # If we don't know, assume the worst.
+            *)      gl_cv_func_symlink_works="guessing no" ;;
+          esac
+         ])
       rm -f conftest.f conftest.link conftest.lnk2])
-    if test "$gl_cv_func_symlink_works" != yes; then
-      REPLACE_SYMLINK=1
-      AC_LIBOBJ([symlink])
-    fi
+    case "$gl_cv_func_symlink_works" in
+      *yes) ;;
+      *)
+        REPLACE_SYMLINK=1
+        ;;
+    esac
   fi
 ])