Removing old workaround for zlib CMakeLists.txt

Author: ktakashi

ext/zlib/CMakeLists.txt

@@ -55,55 +55,23 @@ IF (NOT ZLIB_FOUND)
       DOWNLOAD "http://zlib.net/${USED_ZLIB_VERSION}.tar.gz"
       "${CMAKE_CURRENT_BINARY_DIR}/zlib.tar.gz"
       SHOW_PROGRESS)
+  ELSEIF()
+    MESSAGE(STATUS "Checking zlib.tar.gz ... found")
+  ENDIF()
+  IF (NOT EXISTS "${CMAKE_CURRENT_BINARY_DIR}/${USED_ZLIB_VERSION}")
     EXECUTE_PROCESS(COMMAND ${CMAKE_COMMAND} -E tar xzf
       ${CMAKE_CURRENT_BINARY_DIR}/zlib.tar.gz
       WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
     MESSAGE(STATUS "unpacked zlib.tar.gz")
-  ELSEIF()
-    MESSAGE(STATUS "Checking zlib.tar.gz ... found")
   ENDIF()
+
   # we can't use patch command, as long as all of environments do
   # not have it. so do the same trick as boehm gc.
   SET(ZLIB_SRC_DIR ${CMAKE_CURRENT_BINARY_DIR}/${USED_ZLIB_VERSION})
   MESSAGE(STATUS "zlib source directory ${ZLIB_SRC_DIR}")
-  IF (NOT EXISTS ${ZLIB_SRC_DIR}/CMakeLists.txt.in)
-    FILE(RENAME ${ZLIB_SRC_DIR}/CMakeLists.txt 
-      ${ZLIB_SRC_DIR}/CMakeLists.txt.in)
-  ENDIF()
-  FILE(READ ${ZLIB_SRC_DIR}/CMakeLists.txt.in ZLIB_BUILD_LINES)
-  # convert lines to list
-  STRING(REGEX REPLACE ";" "\\\\;" ZLIB_BUILD_LINES "${ZLIB_BUILD_LINES}")
-  STRING(REGEX REPLACE "\n" ";" ZLIB_BUILD_LINES "${ZLIB_BUILD_LINES}")
-  # recreate CMakeLists.txt
-  FILE(WRITE ${ZLIB_SRC_DIR}/CMakeLists.txt 
-    "# generated by Sagittarius build process\n")
-  IF (WINDOWS_SUPPORT)
-    FILE(APPEND  ${ZLIB_SRC_DIR}/CMakeLists.txt "set(SKIP_INSTALL_ALL TRUE)\n")
-  ENDIF()
-  FOREACH(line ${ZLIB_BUILD_LINES})
-    # this must be a bug on zlib but can't do anything so just modify.
-    IF (line STREQUAL "if(NOT MINGW)")
-      FILE(APPEND ${ZLIB_SRC_DIR}/CMakeLists.txt "if(MSVC)\n")
-    ELSEIF(line MATCHES "^cmake_minimum_required")
-      FILE(APPEND ${ZLIB_SRC_DIR}/CMakeLists.txt
-	"cmake_minimum_required(VERSION 2.8.12)\n")
-    ELSE()
-      FILE(APPEND ${ZLIB_SRC_DIR}/CMakeLists.txt "${line}\n")
-    ENDIF()
-    IF (line MATCHES "^include_directories")
-      # add extra
-      FILE(APPEND ${ZLIB_SRC_DIR}/CMakeLists.txt 
-	"include_directories(\${CMAKE_CURRENT_SOURCE_DIR})\n")
-    ENDIF()
-  ENDFOREACH()
-  IF (WINDOWS_SUPPORT)
-    FILE(APPEND ${ZLIB_SRC_DIR}/CMakeLists.txt
-      "install(TARGETS zlib DESTINATION .)\n")
-  ENDIF()
-  # this will duplicate so delete it
-  FILE(REMOVE ${ZLIB_SRC_DIR}/zconf.h)
-  # CMake add C_FLAGS to RC_FLAGS. how stupid it is, eh?
+
   SET(ZLIB_BUILD_EXAMPLES OFF) # disable example build, we don't need it
+  SET(SKIP_INSTALL_ALL TRUE)
   ADD_SUBDIRECTORY(${ZLIB_SRC_DIR} zlib)
   INCLUDE_DIRECTORIES(${ZLIB_SRC_DIR})
   # for zconf.h