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nixpkgs/pkgs/development/libraries/nlohmann_json/default.nix

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Nix

{ stdenv, fetchFromGitHub, cmake
}:
stdenv.mkDerivation rec {
pname = "nlohmann_json";
version = "3.9.1";
src = fetchFromGitHub {
owner = "nlohmann";
repo = "json";
rev = "v${version}";
sha256 = "sha256-THordDPdH2qwk6lFTgeFmkl7iDuA/7YH71PTUe6vJCs=";
};
nativeBuildInputs = [ cmake ];
cmakeFlags = [
"-DBuildTests=${if doCheck then "ON" else "OFF"}"
"-DJSON_MultipleHeaders=ON"
];
# A test cause the build to timeout https://github.com/nlohmann/json/issues/1816
#doCheck = stdenv.hostPlatform == stdenv.buildPlatform;
doCheck = false;
postInstall = "rm -rf $out/lib64";
meta = with stdenv.lib; {
description = "Header only C++ library for the JSON file format";
homepage = "https://github.com/nlohmann/json";
license = licenses.mit;
platforms = platforms.all;
};
}