Avoid a configure-time syntax error in gl_FUNC_ACL.

[gnulib.git] / m4 / acl.m4

diff --git a/m4/acl.m4 b/m4/acl.m4
index b592dd4..6a1951d 100644 (file)
--- a/m4/acl.m4
+++ b/m4/acl.m4
@@ -1,18 +1,83 @@
 # acl.m4 - check for access control list (ACL) primitives
 
-# Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
 
-# Written by Paul Eggert.
+# Written by Paul Eggert and Jim Meyering.
 
-AC_DEFUN([AC_FUNC_ACL],
+AC_DEFUN([gl_FUNC_ACL],
 [
-  AC_LIBSOURCES([acl.c, acl.h])
   AC_LIBOBJ([acl])
+  AC_LIBOBJ([file-has-acl])
 
   dnl Prerequisites of lib/acl.c.
+  LIB_ACL=
+  use_acl=0
   AC_CHECK_HEADERS(sys/acl.h)
-  AC_CHECK_FUNCS(acl)
+  if test $ac_cv_header_sys_acl_h = yes; then
+    ac_save_LIBS=$LIBS
+    AC_CHECK_FUNCS([acl])
+    use_acl=1
+    AC_SEARCH_LIBS([acl_trivial], [sec],
+      [test "$ac_cv_search_acl_trivial" = "none required" ||
+       LIB_ACL=$ac_cv_search_acl_trivial
+       AC_CHECK_FUNCS([acl_trivial])],
+      [AC_CHECK_FUNCS([acl_trivial])
+       if test $ac_cv_func_acl_trivial != yes; then
+        AC_SEARCH_LIBS([acl_get_file], [acl],
+          [test "$ac_cv_search_acl_get_file" = "none required" ||
+           LIB_ACL=$ac_cv_search_acl_get_file
+           AC_CHECK_FUNCS(
+             [acl_get_file acl_get_fd acl_set_file acl_set_fd \
+              acl_free acl_from_mode acl_from_text \
+              acl_delete_def_file acl_extended_file])
+           if test $ac_cv_func_acl_get_file = yes; then
+             # If the acl_get_file bug is detected, disable all ACL support.
+             gl_ACL_GET_FILE( , [use_acl=0])
+           fi
+           if test $use_acl = 1; then
+             AC_CHECK_HEADERS([acl/libacl.h])
+             if test $ac_cv_func_acl_get_file = yes &&
+                test $ac_cv_func_acl_free = yes; then
+               AC_REPLACE_FUNCS([acl_entries])
+             fi
+           else
+             LIB_ACL=
+           fi])
+       fi])
+    LIBS=$ac_save_LIBS
+  fi
+  AC_SUBST([LIB_ACL])
+  AC_DEFINE_UNQUOTED([USE_ACL], [$use_acl],
+    [Define to nonzero if you want access control list support.])
+
+  # This is for backwards compatibility; remove this by the end of 2007.
+  LIB_ACL_TRIVIAL=
+  AC_SUBST([LIB_ACL_TRIVIAL])
+])
+
+# gl_ACL_GET_FILE(IF-WORKS, IF-NOT)
+# -------------------------------------
+# If `acl_get_file' works (does not have a particular bug),
+# run IF-WORKS, otherwise, IF-NOT.
+# This tests for a Darwin 8.7.0 bug, whereby acl_get_file returns NULL,
+# but sets errno = ENOENT for an existing file or directory.
+AC_DEFUN([gl_ACL_GET_FILE],
+[
+  AC_CACHE_CHECK([for working acl_get_file], gl_cv_func_working_acl_get_file,
+    [AC_RUN_IFELSE(
+       [AC_LANG_PROGRAM(
+         [[#include <sys/types.h>
+          #include <sys/acl.h>
+          #include <errno.h>
+         ]],
+         [[return !! (!acl_get_file (".", ACL_TYPE_ACCESS)
+                      && errno == ENOENT);]])],
+       [gl_cv_func_working_acl_get_file=yes],
+       [gl_cv_func_working_acl_get_file=no],
+       [gl_cv_func_working_acl_get_file=cross-compiling])])
+
+  AS_IF([test $gl_cv_func_working_acl_get_file = yes], [$1], [$2])
 ])