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disable c++fs prior to macOS 10.15

pull/3/head
Li Linfeng 2019-10-29 17:26:33 +08:00
parent f3edf65d77
commit 7f64139a53
1 changed files with 8 additions and 0 deletions
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8
CMakeLists.txt
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@ -293,6 +293,14 @@ check_include_files(byteswap.h HAVE_BYTESWAP_H)
check_include_file_cxx(experimental/filesystem HAVE_EXPERIMENTAL_FILESYSTEM)
configure_file("config.h.in" "config.h")
if(APPLE)
string(REGEX MATCH "[0-9]+" DARWIN_MAJOR_VERSION ${CMAKE_SYSTEM_VERSION})
# C++ filesystem can only be used on macOS Catalina (Darwin 19.0) or later
if(DARWIN_MAJOR_VERSION LESS 19)
message(STATUS "C++17 filesystem is turned off on macOS prior to macOS Catalina")
set(HAVE_EXPERIMENTAL_FILESYSTEM OFF)
endif()
endif()
if (HAVE_EXPERIMENTAL_FILESYSTEM)
if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")