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Require CMake 3.1 to build CMake itself

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This simplifies some policy settings and use of third-party
libraries with imported targets.
This commit is contained in:
Brad King 2017-08-10 11:37:34 -04:00
parent 88c9878af9
commit fb0c3c564c
3 changed files with 6 additions and 24 deletions
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26
CMakeLists.txt
View File

@ -1,13 +1,7 @@
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
cmake_minimum_required(VERSION 2.8.12.2 FATAL_ERROR)
if(POLICY CMP0025)
cmake_policy(SET CMP0025 NEW)
endif()
if(POLICY CMP0053)
cmake_policy(SET CMP0053 NEW)
endif()
cmake_minimum_required(VERSION 3.1 FATAL_ERROR)
project(CMake)
# Make sure we can find internal find_package modules only used for
@ -341,11 +335,7 @@ macro (CMAKE_BUILD_UTILITIES)
endif()
if(CMAKE_USE_SYSTEM_LIBRHASH)
if(NOT CMAKE_VERSION VERSION_LESS 3.0)
find_package(LibRHash)
else()
message(FATAL_ERROR "CMAKE_USE_SYSTEM_LIBRHASH requires CMake >= 3.0")
endif()
find_package(LibRHash)
if(NOT LibRHash_FOUND)
message(FATAL_ERROR
"CMAKE_USE_SYSTEM_LIBRHASH is ON but LibRHash is not found!")
@ -511,11 +501,7 @@ macro (CMAKE_BUILD_UTILITIES)
#---------------------------------------------------------------------
# Build jsoncpp library.
if(CMAKE_USE_SYSTEM_JSONCPP)
if(NOT CMAKE_VERSION VERSION_LESS 3.0)
find_package(JsonCpp)
else()
message(FATAL_ERROR "CMAKE_USE_SYSTEM_JSONCPP requires CMake >= 3.0")
endif()
find_package(JsonCpp)
if(NOT JsonCpp_FOUND)
message(FATAL_ERROR
"CMAKE_USE_SYSTEM_JSONCPP is ON but a JsonCpp is not found!")
@ -530,11 +516,7 @@ macro (CMAKE_BUILD_UTILITIES)
#---------------------------------------------------------------------
# Build libuv library.
if(CMAKE_USE_SYSTEM_LIBUV)
if(NOT CMAKE_VERSION VERSION_LESS 3.0)
find_package(LibUV 1.0.0)
else()
message(FATAL_ERROR "CMAKE_USE_SYSTEM_LIBUV requires CMake >= 3.0")
endif()
find_package(LibUV 1.0.0)
if(NOT LIBUV_FOUND)
message(FATAL_ERROR
"CMAKE_USE_SYSTEM_LIBUV is ON but a libuv is not found!")

2
Utilities/Doxygen/CMakeLists.txt
View File

@ -3,7 +3,7 @@
if(NOT CMake_SOURCE_DIR)
set(CMakeDeveloperReference_STANDALONE 1)
cmake_minimum_required(VERSION 2.8.12.2 FATAL_ERROR)
cmake_minimum_required(VERSION 3.1 FATAL_ERROR)
get_filename_component(tmp "${CMAKE_CURRENT_SOURCE_DIR}" PATH)
get_filename_component(CMake_SOURCE_DIR "${tmp}" PATH)
include(${CMake_SOURCE_DIR}/Modules/CTestUseLaunchers.cmake)

2
Utilities/Sphinx/CMakeLists.txt
View File

@ -3,7 +3,7 @@
if(NOT CMake_SOURCE_DIR)
set(CMakeHelp_STANDALONE 1)
cmake_minimum_required(VERSION 2.8.12.2 FATAL_ERROR)
cmake_minimum_required(VERSION 3.1 FATAL_ERROR)
get_filename_component(tmp "${CMAKE_CURRENT_SOURCE_DIR}" PATH)
get_filename_component(CMake_SOURCE_DIR "${tmp}" PATH)
include(${CMake_SOURCE_DIR}/Modules/CTestUseLaunchers.cmake)