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{ stdenv, lib }:
let
inherit (lib) boolToString optionals;
# See https://mesonbuild.com/Reference-tables.html#cpu-families
cpuFamily = platform: with platform;
/**/ if isAarch32 then "arm"
else if isx86_32 then "x86"
else platform.uname.processor;
makeMesonFlags = { mesonFlags ? [], ... }:
let
crossFile = builtins.toFile "cross-file.conf" ''
[properties]
bindgen_clang_arguments = ['-target', '${stdenv.targetPlatform.config}']
needs_exe_wrapper = ${boolToString (!stdenv.buildPlatform.canExecute stdenv.hostPlatform)}
[host_machine]
system = '${stdenv.targetPlatform.parsed.kernel.name}'
cpu_family = '${cpuFamily stdenv.targetPlatform}'
cpu = '${stdenv.targetPlatform.parsed.cpu.name}'
endian = ${if stdenv.targetPlatform.isLittleEndian then "'little'" else "'big'"}
[binaries]
llvm-config = 'llvm-config-native'
rust = ['rustc', '--target', '${stdenv.targetPlatform.rust.rustcTargetSpec}']
'';
crossFlags = optionals (stdenv.hostPlatform != stdenv.buildPlatform) [ "--cross-file=${crossFile}" ];
in crossFlags ++ mesonFlags;
in
{
inherit makeMesonFlags;
}
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