rt-tests: add cross compilation support (#401020)

Colin 6eea7ca3 f8d9c217

Changed files
+2
pkgs
by-name
rt
rt-tests
+2
pkgs/by-name/rt/rt-tests/package.nix
···
"prefix=$(out)"
"DESTDIR="
"PYLIB=$(out)/${python3.sitePackages}"
+
"CC=${stdenv.cc.targetPrefix}cc"
+
"AR=${stdenv.cc.bintools.targetPrefix}ar"
];
postInstall = ''