vifm: note required string functions

Closes #20270.

1 files changed, 9 insertions, 0 deletions

diff --git a/Library/Formula/vifm.rb b/Library/Formula/vifm.rb
index e9a292b73..8cd120249 100644
--- a/Library/Formula/vifm.rb
+++ b/Library/Formula/vifm.rb
@@ -5,6 +5,15 @@ class Vifm < Formula
   url 'http://downloads.sourceforge.net/project/vifm/vifm/vifm-0.7.5.tar.bz2'
   sha1 '202b369b45d741e32a50084d902c4dcc33014915'
 
+  # This actually depends on Xcode 4.2 or newer, not Lion per se, as it will
+  # work on Snow Leopard running Xcode 4.2. This software uses the string
+  # functions `wcscasecmp` and `wcsncasecmp`, which were not present in
+  # earlier compiler sets.
+  # Note that someone could add implementations of these to str.c in this
+  # software and likely get it to compile across versions, if someone had the
+  # energy to attempt this.
+  depends_on :macos => :lion
+
   def install
     system "./configure", "--disable-dependency-tracking",
                           "--prefix=#{prefix}"