1 files changed, 64 insertions, 0 deletions
diff --git a/m4/getcwd.m4 b/m4/getcwd.m4
new file mode 100644
index 0000000..35d0b53
--- /dev/null
+++ b/m4/getcwd.m4
@@ -0,0 +1,64 @@
+# getcwd.m4 - check for working getcwd that is compatible with glibc
+
+# Copyright (C) 2001, 2003, 2004, 2005 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.
+
+AC_DEFUN([gl_FUNC_GETCWD_NULL],
+  [
+   AC_LIBSOURCES([getcwd.c, getcwd.h])
+
+   AC_CACHE_CHECK([whether getcwd (NULL, 0) allocates memory for result],
+     [gl_cv_func_getcwd_null],
+     [AC_TRY_RUN(
+        [
+#	 include <stdlib.h>
+#	 include <unistd.h>
+#	 ifndef getcwd
+	 char *getcwd ();
+#	 endif
+	 int
+	 main ()
+	 {
+	   if (chdir ("/") != 0)
+	     exit (1);
+	   else
+	     {
+	       char *f = getcwd (NULL, 0);
+	       exit (! (f && f[0] == '/' && !f[1]));
+	     }
+	 }],
+	[gl_cv_func_getcwd_null=yes],
+	[gl_cv_func_getcwd_null=no],
+	[gl_cv_func_getcwd_null=no])])
+])
+
+AC_DEFUN([gl_FUNC_GETCWD],
+[
+  AC_REQUIRE([gl_FUNC_GETCWD_NULL])
+
+  case $gl_cv_func_getcwd_null in
+  yes) gl_FUNC_GETCWD_PATH_MAX;;
+  esac
+
+  case $gl_cv_func_getcwd_null,$gl_cv_func_getcwd_path_max in
+  yes,yes) ;;
+  *)
+    AC_LIBOBJ([getcwd])
+    AC_DEFINE([__GETCWD_PREFIX], [[rpl_]],
+      [Define to rpl_ if the getcwd replacement function should be used.])
+    gl_PREREQ_GETCWD;;
+  esac
+])
+
+# Prerequisites of lib/getcwd.c.
+AC_DEFUN([gl_PREREQ_GETCWD],
+[
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+  AC_REQUIRE([AC_HEADER_DIRENT])
+  AC_REQUIRE([gl_CHECK_TYPE_STRUCT_DIRENT_D_INO])
+  :
+])