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diff --git a/m4/getcwd-robust.m4 b/m4/getcwd-robust.m4
index 3e5f49d5f1f3de9e8788608e555bd00d69150f86..9531bae4dd9de9d5affb419c13d06aa77c635865 100644 (file)
--- a/m4/getcwd-robust.m4
+++ b/m4/getcwd-robust.m4
@@ -35,6 +35,10 @@ AC_DEFUN([GL_FUNC_GETCWD_ROBUST],
 #endif
 
 #ifndef PATH_MAX
+/* There might be a better way to handle this case, but note:
+   - the value shouldn't be anywhere near INT_MAX, and
+   - the value shouldn't be so big that the local declaration, below,
+   blows the stack.  */
 # define PATH_MAX 40000
 #endif