update lemon, re2c, perplex to latest brl-cad versions

up-to-date with upstream commit: commit 1dcb0dd80415464f74ec4150ccec23d29c9ff1ba Author: starseeker <starseeker@2f96ce8b-6d43-0410-b8df-bffccc660ffb> Date: Tue May 19 13:49:47 2015 +0000 Update lemon to version 2015-04-19 git-svn-id: svn://svn.code.sf.net/p/brlcad/code/brlcad/trunk@65011 2f96ce8b-6d43-0410-b8df-bffccc660ffb
stepcode · Sep 8, 2015 · 07421be · 07421be
1 parent ba01dfa
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diff --git a/lemon/CMakeLists.txt b/lemon/CMakeLists.txt
@@ -2,6 +2,9 @@
 CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 IF(COMMAND CMAKE_POLICY)
   CMAKE_POLICY(SET CMP0003 NEW)
+  if ("${CMAKE_VERSION}" VERSION_GREATER 2.99)
+    CMAKE_POLICY(SET CMP0026 OLD)
+  endif ("${CMAKE_VERSION}" VERSION_GREATER 2.99)
 ENDIF(COMMAND CMAKE_POLICY)
 
 # Set CMake project name