-# serial 1
+# serial 2
# See if we need to provide linkat replacement.
-dnl Copyright (C) 2009 Free Software Foundation, Inc.
+dnl Copyright (C) 2009-2010 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.
HAVE_LINKAT=0
AC_LIBOBJ([linkat])
AC_LIBOBJ([at-func2])
+ else
+ AC_CACHE_CHECK([whether linkat(,AT_SYMLINK_FOLLOW) works],
+ [gl_cv_func_linkat_follow],
+ [rm -rf conftest.f1 conftest.f2
+ touch conftest.f1
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <fcntl.h>
+#include <unistd.h>
+#ifdef __linux__
+/* Linux added linkat in 2.6.16, but did not add AT_SYMLINK_FOLLOW
+ until 2.6.18. Always replace linkat to support older kernels. */
+choke me
+#endif
+]], [return linkat (AT_FDCWD, "conftest.f1", AT_FDCWD, "conftest.f2",
+ AT_SYMLINK_FOLLOW);])],
+ [gl_cv_func_linkat_follow=yes],
+ [gl_cv_func_linkat_follow="need runtime check"])
+ rm -rf conftest.f1 conftest.f2])
+ if test "$gl_cv_func_linkat_follow" != yes; then
+ REPLACE_LINKAT=1
+ AC_LIBOBJ([linkat])
+ fi
fi
])