I want to use the header available in c++20.
I am using the most up to date release of cmake.
my CMakeFiles looks like
set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_BUILD_TYPE debug)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++20")
i am using clang 9 as my compiler.
however i am getting the following error when including :
fatal error: 'format' file not found
#include <format>
i have also used the flag -std=c++2a
, with no effect. In short, i feel i have missed something important here. Im a little new to cmake, any help?
According to the C++ compiler support page ( archive ) on cppreference, none of the mainstream compilers currently support the C++20 <format>
functionalities.
Therefore, you can't currently use #include <format>
. Consider using the {fmt} library for now, on which the C++20 <format>
library is based. It is famous for its high safety and efficiency.
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