basisu/build.zig at main · sarvex/basisu · GitHub

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const std = @import("std");

pub fn build(b: *std.Build) !void {
    const target = b.standardTargetOptions(.{});
    const optimize = b.standardOptimizeOption(.{});

    const build_encoder = b.option(bool, "encoder", "Build the basisu encoder") orelse true;
    const build_transcoder = b.option(bool, "transcoder", "build the basisu transcoder") orelse true;

    if (!build_encoder and !build_transcoder) {
        std.log.err("I'm supposed to build... nothing?", .{});
        return error.NothingToBuild;
    }

    const lib = b.addStaticLibrary(.{
        .name = "basisu",
        .target = target,
        .optimize = optimize,
    });

    lib.linkLibCpp();

    lib.defineCMacro("BASISU_FORCE_DEVEL_MESSAGES", "0");
    lib.defineCMacro("BASISU_SUPPORT_KTX2_ZSTD", "0");

    lib.addIncludePath("encoder");
    lib.addIncludePath("transcoder");

    lib.addCSourceFile("zstd/zstd.c", &.{});

    if (build_encoder) {
        lib.addCSourceFiles(&encoder_sources, &.{});
        lib.installHeadersDirectoryOptions(.{
            .source_dir = "encoder",
            .install_dir = .header,
            .install_subdir = "encoder",
            .exclude_extensions = &.{ "inc", "cpp" },
        });
    }

    if (build_transcoder) {
        lib.addCSourceFiles(&transcoder_sources, &.{
            "-Wno-deprecated-builtins",
            "-Wno-deprecated-declarations",
            "-Wno-array-bounds",
        });
        lib.installHeadersDirectoryOptions(.{
            .source_dir = "transcoder",
            .install_dir = .header,
            .install_subdir = "transcoder",
            .exclude_extensions = &.{ "inc", "cpp" },
        });
    }

    b.installArtifact(lib);
}

const encoder_sources = [_][]const u8{
    "encoder/basisu_backend.cpp",
    "encoder/basisu_basis_file.cpp",
    "encoder/basisu_bc7enc.cpp",
    "encoder/basisu_comp.cpp",
    "encoder/basisu_enc.cpp",
    "encoder/basisu_etc.cpp",
    "encoder/basisu_frontend.cpp",
    "encoder/basisu_gpu_texture.cpp",
    "encoder/basisu_kernels_sse.cpp",
    "encoder/basisu_opencl.cpp",
    "encoder/basisu_pvrtc1_4.cpp",
    "encoder/basisu_resample_filters.cpp",
    "encoder/basisu_resampler.cpp",
    "encoder/basisu_ssim.cpp",
    "encoder/basisu_uastc_enc.cpp",
    "encoder/jpgd.cpp",
    "encoder/pvpngreader.cpp",
};

const transcoder_sources = [_][]const u8{
    "transcoder/basisu_transcoder.cpp",
};