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Remove setting c++17 in FindFilesystem (#1102)

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Martin Chang 2021-12-11 10:02:45 +08:00 committed by GitHub
parent 754fd2da29
commit 719d50c0a7
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1 changed files with 9 additions and 1 deletions
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10
cmake_modules/FindFilesystem.cmake
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@ -102,8 +102,14 @@ if(TARGET std::filesystem)
return()
endif()
cmake_minimum_required(VERSION 3.10)
# Ignore fileystem check if version too low
if(CMAKE_VERSION VERSION_LESS 3.10)
set(CXX_FILESYSTEM_HAVE_FS FALSE CACHE BOOL "TRUE if we have the C++ filesystem headers")
set(Filesystem_FOUND FALSE CACHE BOOL "TRUE if we can run a program using std::filesystem" FORCE)
return()
endif()
cmake_minimum_required(VERSION 3.10)
include(CMakePushCheckState)
include(CheckIncludeFileCXX)
@ -126,6 +132,7 @@ cmake_push_check_state()
set(CMAKE_REQUIRED_QUIET ${Filesystem_FIND_QUIETLY})
# All of our tests required C++17 or later
set(BACKUP_CXX_STANDARD "${CMAKE_CXX_STANDARD}")
set(CMAKE_CXX_STANDARD 17)
# Normalize and check the component list we were given
@ -251,3 +258,4 @@ if(Filesystem_FIND_REQUIRED AND NOT Filesystem_FOUND)
message(FATAL_ERROR "Cannot run simple program using std::filesystem")
endif()
set(CMAKE_CXX_STANDARD "${BACKUP_CXX_STANDARD}")