[Nix-dev] [PATCH] Remove st_nlink optimisation from lndir

[David Brown]

lndir uses an old optimization to try and avoid statting leaf
directories.  Aside from being fairly pointless on modern machines, it
breaks on some modern filesystems, such as btrfs, which have opted to
already set nlink to 1 on directores, rather than limiting the number
of possible subdirectories available.  This breaks on any filesystem
when there are more than 32768 subdirs in one directory.
---
 pkgs/servers/x11/xorg/overrides.nix |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/pkgs/servers/x11/xorg/overrides.nix b/pkgs/servers/x11/xorg/overrides.nix
index e8a311a..1582fc4 100644
--- a/pkgs/servers/x11/xorg/overrides.nix
+++ b/pkgs/servers/x11/xorg/overrides.nix
@@ -153,4 +153,11 @@ in
     configureFlags = "LIBUUID_CFLAGS='' LIBUUID_LIBS=''";
   };
 
+  lndir = attrs: attrs // {
+    preConfigure = ''
+      substituteInPlace lndir.c \
+        --replace 'n_dirs--;' ""
+    '';
+  };
+
 }
-- 
1.7.1