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set min required cmake version to 3.12

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The already used functionallity already
requires a more recent cmake version.
Short summary why a never version is required:
  CMAKE_CXX_STANDARD requires >=3.1
  CMAKE_COMPILER_IS_GNUCC requires >3.7
  ENABLE_LTO can be simplified with >3.11 (3.13 VS)
This commit is contained in:
Bernd Amend 2021-05-22 14:48:12 +02:00
parent 39f7aa0900
commit 59f64d8d82
1 changed files with 8 additions and 9 deletions
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17
CMakeLists.txt
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@ -1,12 +1,12 @@
cmake_minimum_required(VERSION 2.8) cmake_minimum_required(VERSION 3.12)
cmake_policy(SET CMP0054 NEW)
if(NOT ${CMAKE_VERSION} VERSION_LESS "3.1")
cmake_policy(SET CMP0054 NEW)
endif()
set(CMAKE_CXX_STANDARD 17) set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON) set(CMAKE_CXX_STANDARD_REQUIRED ON)
# required since cmake 3.4 at least for libc++
set(CMAKE_ENABLE_EXPORTS ON)
project(chaiscript) project(chaiscript)
option(MULTITHREAD_SUPPORT_ENABLED "Multithreaded Support Enabled" TRUE) option(MULTITHREAD_SUPPORT_ENABLED "Multithreaded Support Enabled" TRUE)
@ -62,10 +62,9 @@ if(CMAKE_COMPILER_IS_GNUCC OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
endif() endif()
option(ENABLE_LTO "Enable Link Time Optimization" FALSE) option(ENABLE_LTO "Enable Link Time Optimization" FALSE)
if(ENABLE_LTO)
if (ENABLE_LTO) check_ipo_supported()
add_definitions(-flto) set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
set(LINKER_FLAGS "${LINKER_FLAGS} -flto")
endif() endif()
option(GPROF_OUTPUT "Generate profile data" FALSE) option(GPROF_OUTPUT "Generate profile data" FALSE)