From 20186a40791f662696857720d414dd7cd2ace8a2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludovic=20Court=C3=A8s?= <ludo@gnu.org>
Date: Wed, 10 Feb 2010 15:55:50 +0000
Subject: [PATCH] Don't rely on `PATH_MAX' on GNU.

---
 src/libutil/util.cc | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/libutil/util.cc b/src/libutil/util.cc
index bb17fa5f6..8c52625a2 100644
--- a/src/libutil/util.cc
+++ b/src/libutil/util.cc
@@ -53,10 +53,20 @@ Path absPath(Path path, Path dir)
 {
     if (path[0] != '/') {
         if (dir == "") {
+#ifdef __GNU__
+            /* GNU (aka. GNU/Hurd) doesn't have any limitation on path
+               lengths and doesn't define `PATH_MAX'.  */
+            char *buf = getcwd(NULL, 0);
+            if (buf == NULL)
+#else
             char buf[PATH_MAX];
             if (!getcwd(buf, sizeof(buf)))
+#endif
                 throw SysError("cannot get cwd");
             dir = buf;
+#ifdef __GNU__
+            free(buf);
+#endif
         }
         path = dir + "/" + path;
     }