cmake: use standard findxxx modules for cmake v2.8+

CMake/FindOpenSSL.cmake

@@ -2,17 +2,19 @@
 # Adds OPENSSL_INCLUDE_DIRS and libeay32
 include("${CMAKE_ROOT}/Modules/FindOpenSSL.cmake")
 
-# Bill Hoffman told that libeay32 is necessary for him:
-find_library(SSL_LIBEAY NAMES libeay32)
+# starting 2.8 it is better to use standard modules
+if(CMAKE_MAJOR_VERSION EQUAL "2" AND CMAKE_MINOR_VERSION LESS "8")
+  # Bill Hoffman told that libeay32 is necessary for him:
+  find_library(SSL_LIBEAY NAMES libeay32)
 
-if(OPENSSL_FOUND)
+  if(OPENSSL_FOUND)
     if(SSL_LIBEAY)
       list(APPEND OPENSSL_LIBRARIES ${SSL_LIBEAY})
     else()
       set(OPENSSL_FOUND FALSE)
     endif()
-endif()
-
+  endif()
+endif() # if (CMAKE_MAJOR_VERSION EQUAL "2" AND CMAKE_MINOR_VERSION LESS "8")
 
 if(OPENSSL_FOUND)
   set(OPENSSL_INCLUDE_DIRS ${OPENSSL_INCLUDE_DIR})

CMake/FindZLIB.cmake

@@ -1,8 +1,10 @@
 # Locate zlib
 include("${CMAKE_ROOT}/Modules/FindZLIB.cmake")
 
-find_library(ZLIB_LIBRARY_DEBUG NAMES zd zlibd zdlld zlib1d )
-
-if(ZLIB_FOUND AND ZLIB_LIBRARY_DEBUG)
+# starting 2.8 it is better to use standard modules
+if(CMAKE_MAJOR_VERSION EQUAL "2" AND CMAKE_MINOR_VERSION LESS "8")
+  find_library(ZLIB_LIBRARY_DEBUG NAMES zd zlibd zdlld zlib1d )
+  if(ZLIB_FOUND AND ZLIB_LIBRARY_DEBUG)
     set( ZLIB_LIBRARIES optimized "${ZLIB_LIBRARY}" debug ${ZLIB_LIBRARY_DEBUG})
+  endif()
 endif()