VWR-24261: Configuration with cmake 2.8 is extremely slow

Add non-broken FindZLIB.cmake.

doc/contributions.txt

@@ -77,6 +77,7 @@ Aleric Inglewood
 	VWR-24247
 	VWR-24251
 	VWR-24252
+	VWR-24261
 	SNOW-84
 	SNOW-477
 	SNOW-744

indra/cmake/CMakeLists.txt

@@ -33,6 +33,7 @@ set(cmake_SOURCE_FILES
     FindMySQL.cmake
     FindOpenJPEG.cmake
     FindXmlRpcEpi.cmake
+    FindZLIB.cmake
     FMOD.cmake
     FreeType.cmake
     GStreamer010Plugin.cmake

indra/cmake/FindZLIB.cmake

+# -*- cmake -*-
+
+# - Find zlib
+# Find the ZLIB includes and library
+# This module defines
+#  ZLIB_INCLUDE_DIRS, where to find zlib.h, etc.
+#  ZLIB_LIBRARIES, the libraries needed to use zlib.
+#  ZLIB_FOUND, If false, do not try to use zlib.
+#
+# This FindZLIB is about 43 times as fast the one provided with cmake (2.8.x),
+# because it doesn't look up the version of zlib, resulting in a dramatic
+# speed up for configure (from 4 minutes 22 seconds to 6 seconds).
+#
+# Note: Since this file is only used for standalone, the windows
+# specific parts were left out.
+
+FIND_PATH(ZLIB_INCLUDE_DIR zlib.h
+  NO_SYSTEM_ENVIRONMENT_PATH
+  )
+
+FIND_LIBRARY(ZLIB_LIBRARY z)
+
+if (ZLIB_LIBRARY AND ZLIB_INCLUDE_DIR)
+  SET(ZLIB_INCLUDE_DIRS ${ZLIB_INCLUDE_DIR})
+  SET(ZLIB_LIBRARIES ${ZLIB_LIBRARY})
+  SET(ZLIB_FOUND "YES")
+else (ZLIB_LIBRARY AND ZLIB_INCLUDE_DIR)
+  SET(ZLIB_FOUND "NO")
+endif (ZLIB_LIBRARY AND ZLIB_INCLUDE_DIR)
+
+if (ZLIB_FOUND)
+  if (NOT ZLIB_FIND_QUIETLY)
+	message(STATUS "Found ZLIB: ${ZLIB_LIBRARIES}")
+	SET(ZLIB_FIND_QUIETLY TRUE)
+  endif (NOT ZLIB_FIND_QUIETLY)
+else (ZLIB_FOUND)
+  if (ZLIB_FIND_REQUIRED)
+	message(FATAL_ERROR "Could not find ZLIB library")
+  endif (ZLIB_FIND_REQUIRED)
+endif (ZLIB_FOUND)
+
+mark_as_advanced(
+  ZLIB_LIBRARY
+  ZLIB_INCLUDE_DIR
+  )
+