const builtin = @import("builtin");

    const flags = [_][]const u8{

    const base_flags = [_][]const u8{

        // "-DUSE_AVX2 -mavx2",
        // "-DUSE_SSE41 -msse4.1",
        // "-DUSE_SSE3 -msse3",
        // "-DUSE_SSE2 -msse2",
        // "-DUSE_SSE -msse",
        "-DUSE_NEON",

    };
    const flags = blk: {
        var f = std.BoundedArray([]const u8, 16).init(0) catch unreachable;
        f.appendSlice(&base_flags) catch unreachable;
        if (builtin.cpu.arch.isX86()) {
            if (std.Target.x86.featureSetHas(builtin.cpu.features, .avx2)) {
                f.append("-DUSE_AVX2 -mavx2") catch unreachable;
            }
            if (std.Target.x86.featureSetHas(builtin.cpu.features, .sse)) {
                f.append("-DUSE_SSE -msse") catch unreachable;
            }
            if (std.Target.x86.featureSetHas(builtin.cpu.features, .sse2)) {
                f.append("-DUSE_SSE2 -msse2") catch unreachable;
            }
            if (std.Target.x86.featureSetHas(builtin.cpu.features, .sse3)) {
                f.append("-DUSE_sse3 -msse3") catch unreachable;
            }
            if (std.Target.x86.featureSetHas(builtin.cpu.features, .sse4_1)) {
                f.append("-DUSE_SSE41 -msse4.1") catch unreachable;
            }
        } else if (builtin.cpu.arch.isAARCH64()) {
            // rpi4 does not report neon feature :-(
            f.append("-DUSE_NEON") catch unreachable;
            if (std.Target.arm.featureSetHas(builtin.cpu.features, .neon)) {
                f.append("-DUSE_NEON") catch unreachable;
            }
        }
        break :blk f.constSlice();

    exe.linkLibC();

    exe.addCSourceFile("src/nnue/nnue.cpp", &flags);
    exe.addCSourceFile("src/nnue/misc.cpp", &flags);

    exe.addCSourceFiles(&[_][]const u8{ "src/nnue/nnue.cpp", "src/nnue/misc.cpp" }, flags);

    exe_tests.linkLibC();

    exe_tests.addCSourceFile("src/nnue/nnue.cpp", &flags);
    exe_tests.addCSourceFile("src/nnue/misc.cpp", &flags);

    exe_tests.addCSourceFiles(&[_][]const u8{ "src/nnue/nnue.cpp", "src/nnue/misc.cpp" }, flags);