nt-lite/code/build/build.c

// Project build orchestrator. This file describes the Windows/MSVC build graph and keeps driver dependencies explicit.

#define NOB_IMPLEMENTATION
#include "nob.h"

// Compiler and linker flags stay in macros so they can be used in file-scope aggregate initializers.
// MSVC C rejects initializing a static object from another object, even when the source object is const.
// Drivers and user binaries do not inherit kernel include paths so private dependencies fail at compile time.
#define COMMON_CFLAGS_LITERAL "/nologo /W3 /WX /O2 /GS- /Gs999999 /Gz /Gy /EHsc- /GR- /Oi- /Z7 /std:c17 /D_CRT_SECURE_NO_WARNINGS /D_CRT_NONSTDC_NO_WARNINGS /Icode\\public /Icode\\common\\include"
#define KERNEL_CFLAGS_LITERAL COMMON_CFLAGS_LITERAL " /Icode\\kernel\\include"
#define DRIVER_CFLAGS_LITERAL COMMON_CFLAGS_LITERAL
#define USER_CFLAGS_LITERAL COMMON_CFLAGS_LITERAL
// POSIX targets own their standard C/POSIX headers; /X prevents the host UCRT from entering the target ABI.
#define POSIX_USER_CFLAGS_LITERAL "/X /Icode\\public\\posix /Icode\\public\\freestanding " USER_CFLAGS_LITERAL
#define BOOT_CFLAGS_LITERAL KERNEL_CFLAGS_LITERAL
#define USER_HEAP_OBJS_LITERAL "obj\\runtime\\user_heap.obj obj\\runtime\\user_heap_exports.obj"
#define NATIVE_RUNTIME_OBJS_LITERAL "obj\\runtime\\native_exception.obj obj\\runtime\\native_start.obj"
#define NATIVE_EXE_LIBS_LITERAL "bin\\syscall.lib obj\\libc.obj " USER_HEAP_OBJS_LITERAL " " NATIVE_RUNTIME_OBJS_LITERAL
#define NATIVE_INIT_LIBS_LITERAL "bin\\syscall_s.lib obj\\libc.obj obj\\runtime\\native_exception.obj"
#define NATIVE_SERVICE_LIBS_LITERAL "bin\\syscall_s.lib obj\\libc.obj " USER_HEAP_OBJS_LITERAL " obj\\runtime\\native_exception.obj"
#define WIN32_EXE_LIBS_LITERAL "bin\\win32.lib bin\\syscall.lib obj\\libc.obj obj\\runtime\\native_start.obj"
#define POSIX_EXE_LIBS_LITERAL "bin\\posix.lib bin\\syscall.lib obj\\libc.obj obj\\runtime\\posix_start.obj obj\\runtime\\native_exception.obj"
#define NATIVE_EXE_ENTRY_LITERAL "/ENTRY:NtlNativeStart"
#define USER_IMAGE_FLAGS_LITERAL "/DYNAMICBASE /HIGHENTROPYVA"
#define LWIP_CFLAGS_LITERAL DRIVER_CFLAGS_LITERAL " /Icode\\drivers\\net\\lwip\\include /Icode\\drivers\\net\\lwip\\third_party\\lwip\\src\\include /wd4005 /wd4100 /wd4103 /wd4127 /wd4244 /wd4267 /wd4706"
#define EXT4_CFLAGS_LITERAL DRIVER_CFLAGS_LITERAL " /Icode\\drivers\\fs\\ext4\\include /Icode\\drivers\\fs\\ext4\\third_party\\lwext4\\include /DCONFIG_USE_DEFAULT_CFG=1 /DCONFIG_HAVE_OWN_ERRNO=1 /DCONFIG_DEBUG_PRINTF=0 /DCONFIG_DEBUG_ASSERT=0 /DCONFIG_BLOCK_DEV_ENABLE_STATS=0 /DCONFIG_EXT4_BLOCKDEVS_COUNT=8 /DCONFIG_EXT4_MOUNTPOINTS_COUNT=8 /wd4005 /wd4100 /wd4101 /wd4103 /wd4127 /wd4244 /wd4267 /wd4706 /wd4996"
#define NTFS3G_CFLAGS_LITERAL DRIVER_CFLAGS_LITERAL " /Icode\\drivers\\fs\\ntfs\\ntfs3g\\include /Icode\\drivers\\fs\\ntfs\\ntfs3g\\third_party\\ntfs-3g\\include /Icode\\drivers\\fs\\ntfs\\ntfs3g\\third_party\\ntfs-3g\\include\\ntfs-3g /DHAVE_CONFIG_H=1 /DNO_NTFS_DEVICE_DEFAULT_IO_OPS=1 /wd4005 /wd4018 /wd4100 /wd4101 /wd4103 /wd4127 /wd4133 /wd4146 /wd4244 /wd4267 /wd4305 /wd4311 /wd4312 /wd4706 /wd4996"
#define LFLAGS_LITERAL "/nologo /NODEFAULTLIB /DEBUG"

// Partition offsets inside disk.vhd
#define VHD_PART1 "disk.vhd@@1M"   // ESP / Partition 1 (Offset 1MB)
#define VHD_PART2 "disk.vhd@@65M"  // Test/Data / Partition 2 (Offset 65MB)
#define DEFAULT_VHD_DISK_SIGNATURE 0x4E544C31u

const char* CommonCflags = COMMON_CFLAGS_LITERAL;
const char* KernelCflags = KERNEL_CFLAGS_LITERAL;
const char* UserCflags = USER_CFLAGS_LITERAL;
const char* PosixUserCflags = POSIX_USER_CFLAGS_LITERAL;
const char* BootCflags = BOOT_CFLAGS_LITERAL;
const char* LwipCflags = LWIP_CFLAGS_LITERAL;
const char* Ext4Cflags = EXT4_CFLAGS_LITERAL;
const char* Ntfs3gCflags = NTFS3G_CFLAGS_LITERAL;
const char* LFLAGS = LFLAGS_LITERAL;

typedef struct Driver_Target {
    const char* name;
    const char* obj_dir;
    const char* sources;
    const char* cflags;
    const char* libs;
} Driver_Target;

#define DRIVER_TARGET(name_, obj_dir_, sources_) { (name_), (obj_dir_), (sources_), DRIVER_CFLAGS_LITERAL, "" }
#define DRIVER_TARGET_LIBS(name_, obj_dir_, sources_, libs_) { (name_), (obj_dir_), (sources_), DRIVER_CFLAGS_LITERAL, (libs_) }
#define DRIVER_TARGET_FLAGS(name_, obj_dir_, sources_, cflags_) { (name_), (obj_dir_), (sources_), (cflags_), "" }

static const Driver_Target PCI_BUS_DRIVER =
    DRIVER_TARGET_FLAGS("pci", "obj\\drivers\\pci", "code\\drivers\\bus\\pci\\pci.c", DRIVER_CFLAGS_LITERAL " /DPCI_SYS_BUILD");

static const Driver_Target STANDALONE_DRIVERS[] = {
    DRIVER_TARGET("ps2",    "obj\\drivers\\ps2",    "code\\drivers\\input\\ps2\\ps2.c code\\drivers\\input\\ps2\\ps2_i8042.c"),
    DRIVER_TARGET("serial", "obj\\drivers\\serial", "code\\drivers\\input\\serial\\serial.c"),
    DRIVER_TARGET_LIBS("hda", "obj\\drivers\\hda", "code\\drivers\\audio\\hda\\hda.c code\\drivers\\audio\\hda\\hda_transport.c code\\drivers\\audio\\hda\\hda_codec.c", "bin\\pci.lib"),
    DRIVER_TARGET_LIBS("ata",    "obj\\drivers\\ata",    "code\\drivers\\storage\\ata\\ata.c", "bin\\pci.lib"),
    DRIVER_TARGET_LIBS("ahci",   "obj\\drivers\\ahci",   "code\\drivers\\storage\\ahci\\ahci.c code\\drivers\\storage\\ahci\\ahci_port.c", "bin\\pci.lib"),
    DRIVER_TARGET("fat",    "obj\\drivers\\fat",    "code\\drivers\\fs\\fat\\fat.c code\\drivers\\fs\\fat\\fat_directory.c code\\drivers\\fs\\fat\\fat_file.c code\\drivers\\fs\\fat\\fat_async.c code\\drivers\\fs\\fat\\fat_driver.c code\\drivers\\fs\\fat\\fat_mount.c"),
    DRIVER_TARGET_LIBS("vmwaresvga", "obj\\drivers\\vmwaresvga", "code\\drivers\\display\\vmwaresvga\\vmwaresvga.c", "bin\\pci.lib"),
    DRIVER_TARGET_LIBS("usb",    "obj\\drivers\\usb",    "code\\drivers\\bus\\usb\\usb.c code\\drivers\\bus\\usb\\usb_bus.c code\\drivers\\bus\\usb\\usb_composite.c code\\drivers\\bus\\usb\\usb_core.c code\\drivers\\bus\\usb\\usb_xhci.c code\\drivers\\bus\\usb\\usb_hid.c code\\drivers\\bus\\usb\\usb_storage.c code\\drivers\\bus\\usb\\usb_hub.c", "bin\\pci.lib"),
    DRIVER_TARGET_LIBS("rtl816x", "obj\\drivers\\rtl816x", "code\\drivers\\net\\rtl816x\\rtl816x.c", "bin\\pci.lib"),
    DRIVER_TARGET_LIBS("rtl8139", "obj\\drivers\\rtl8139", "code\\drivers\\net\\rtl8139\\rtl8139.c", "bin\\pci.lib"),
};

// Creates layout.
void create_layout() {
    const char* dirs[] = {
        "obj", "bin", "obj\\boot", "obj\\kernel", "obj\\lwip", "obj\\ext4", "obj\\ntfs3g", "obj\\hal",
        "obj\\syscall", "obj\\runtime", "obj\\win32", "obj\\posix", "obj\\drivers", "obj\\init", "obj\\rssrv", "obj\\posixsrv", "obj\\dwm",
        "obj\\shell_win32", "obj\\shell_posix", "obj\\shell_native",
        "obj\\async_apc", "obj\\async_cancel", "obj\\apc_return_smoke", "obj\\edit", "obj\\httpget",
        "obj\\tcpserve", "obj\\udp", "obj\\resolve", "obj\\ping", "obj\\doom", "obj\\video", "obj\\memtop",
        "obj\\file_stat_smoke", "obj\\handle_dup_smoke", "obj\\security_smoke", "obj\\port_ipc_smoke", "obj\\resource_service_smoke", "obj\\named_queue_lifetime_smoke", "obj\\input_api_smoke", "obj\\input_model_smoke", "obj\\input_service_smoke", "obj\\console_service_smoke", "obj\\desktop_smoke", "obj\\timer_smoke", "obj\\stats_abi_smoke", "obj\\realpath_smoke", "obj\\file_lock_smoke", "obj\\process_protection_smoke", "obj\\process_exit_multithread_smoke", "obj\\thread_name_smoke", "obj\\process_builder_smoke", "obj\\socket_addr_smoke", "obj\\syscall_contract_smoke", "obj\\would_block_smoke", "obj\\audio_stream_smoke", "obj\\winmm_waveout_smoke", "obj\\win32_condition_variable_smoke", "obj\\win32_mutex_smoke", "obj\\win32_thread_suspend_smoke", "obj\\win32_module_lookup_smoke", "obj\\cwd_userspace_smoke", "obj\\mmap_smoke", "obj\\pcache_smoke", "obj\\pcache_pressure", "obj\\dirty_writeback", "obj\\shared_mmap",
        "obj\\pcache_invalidate", "obj\\pcache_mmap_read_reuse", "obj\\pcache_multithread",
        "obj\\all_tests", "obj\\posix_service_smoke", "obj\\surface_smoke", "obj\\surface_invalid_rect", "obj\\surface_multithread_commit", "obj\\surface_cross_process_smoke", "obj\\net_irp_smoke", "obj\\module_load_smoke", "obj\\posix_module_smoke", "obj\\posix_runtime_smoke", "obj\\posix_fd_smoke", "obj\\posix_pipe_smoke", "obj\\exception_dispatcher_smoke", "obj\\native_exception_runtime_smoke", "obj\\native_raise_exception_smoke", "obj\\exception_smoke", "obj\\win32_exception_smoke", "obj\\win32_seh_smoke"
    };
    for (size_t i = 0; i < NOB_ARRAY_LEN(dirs); i++) nob_mkdir_if_not_exists(dirs[i]);
    nob_mkdir_if_not_exists(PCI_BUS_DRIVER.obj_dir);
    for (size_t i = 0; i < NOB_ARRAY_LEN(STANDALONE_DRIVERS); i++) nob_mkdir_if_not_exists(STANDALONE_DRIVERS[i].obj_dir);
}

// Runs a shell command and waits for it to finish.
bool run_sync(const char* cmd_str) {
    Nob_Cmd cmd = {0};
    nob_cmd_append(&cmd, "cmd.exe", "/c", cmd_str);
    bool ok = nob_cmd_run_sync(cmd);
    nob_cmd_free(cmd);
    return ok;
}

// Launches a shell command while the build graph continues.
Nob_Proc run_async(const char* cmd_str) {
    Nob_Cmd cmd = {0};
    nob_cmd_append(&cmd, "cmd.exe", "/c", cmd_str);
    Nob_Proc proc = nob_cmd_run_async(cmd);
    nob_cmd_free(cmd);
    return proc;
}

// Deletes stale object files from a target directory before compiling into it.
bool clean_object_directory(const char* obj_dir) {
    const char* cmd = nob_temp_sprintf("if exist %s\\*.obj del /q %s\\*.obj", obj_dir, obj_dir);
    return run_sync(cmd);
}

// Cleans object directories that are linked through wildcards.
bool clean_build_object_directories(void) {
    const char* dirs[] = {
        "obj\\boot", "obj\\kernel", "obj\\lwip", "obj\\ext4", "obj\\hal",
        "obj\\syscall", "obj\\runtime", "obj\\win32", "obj\\posix",
        "obj\\init", "obj\\rssrv", "obj\\posixsrv", "obj\\dwm", "obj\\shell_win32", "obj\\shell_posix", "obj\\shell_native",
        "obj\\async_apc", "obj\\async_cancel", "obj\\apc_return_smoke", "obj\\edit", "obj\\httpget",
        "obj\\tcpserve", "obj\\udp", "obj\\resolve", "obj\\ping",
        "obj\\doom", "obj\\video", "obj\\memtop", "obj\\file_stat_smoke", "obj\\handle_dup_smoke", "obj\\security_smoke", "obj\\port_ipc_smoke", "obj\\resource_service_smoke", "obj\\named_queue_lifetime_smoke", "obj\\input_api_smoke", "obj\\input_model_smoke", "obj\\input_service_smoke", "obj\\console_service_smoke", "obj\\desktop_smoke", "obj\\timer_smoke", "obj\\stats_abi_smoke", "obj\\realpath_smoke", "obj\\file_lock_smoke", "obj\\process_protection_smoke", "obj\\process_exit_multithread_smoke", "obj\\thread_name_smoke", "obj\\process_builder_smoke", "obj\\socket_addr_smoke", "obj\\syscall_contract_smoke", "obj\\would_block_smoke", "obj\\audio_stream_smoke", "obj\\winmm_waveout_smoke", "obj\\win32_condition_variable_smoke", "obj\\win32_mutex_smoke", "obj\\win32_thread_suspend_smoke", "obj\\win32_module_lookup_smoke", "obj\\cwd_userspace_smoke", "obj\\mmap_smoke", "obj\\pcache_smoke", "obj\\pcache_pressure", "obj\\dirty_writeback", "obj\\shared_mmap",
        "obj\\pcache_invalidate", "obj\\pcache_mmap_read_reuse", "obj\\pcache_multithread",
        "obj\\all_tests", "obj\\posix_service_smoke", "obj\\surface_smoke", "obj\\surface_invalid_rect", "obj\\surface_multithread_commit", "obj\\surface_cross_process_smoke", "obj\\net_irp_smoke", "obj\\module_load_smoke", "obj\\posix_module_smoke", "obj\\posix_runtime_smoke", "obj\\posix_fd_smoke", "obj\\posix_pipe_smoke", "obj\\exception_dispatcher_smoke", "obj\\native_exception_runtime_smoke", "obj\\native_raise_exception_smoke", "obj\\exception_smoke", "obj\\win32_exception_smoke", "obj\\win32_seh_smoke"
    };

    for (size_t i = 0; i < NOB_ARRAY_LEN(dirs); i++) {
        if (!clean_object_directory(dirs[i])) return false;
    }

    if (!clean_object_directory(PCI_BUS_DRIVER.obj_dir)) return false;
    for (size_t i = 0; i < NOB_ARRAY_LEN(STANDALONE_DRIVERS); i++) {
        if (!clean_object_directory(STANDALONE_DRIVERS[i].obj_dir)) return false;
    }

    return true;
}

// Creates the USB fat root once and leaves its contents alone between builds.
bool create_usbfatroot_if_missing(void) {
    return nob_mkdir_if_not_exists("usbfatroot");
}

// Copies one local file into a FAT image using mcopy without admin rights.
bool mcopy_file(const char* src, const char* vhd_target, const char* dst_path) {
    const char* cmd = nob_temp_sprintf("mcopy -o -i %s %s ::%s", vhd_target, src, dst_path);
    return run_sync(cmd);
}

// Copies several same-name files into one FAT directory with a single mcopy process.
bool mcopy_files_to_dir(const char* vhd_target,
                        const char* dst_dir,
                        const char* const* sources,
                        size_t source_count) {
    if (!vhd_target || !dst_dir || (!sources && source_count))
        return false;
    if (!source_count)
        return true;

    Nob_String_Builder command = {0};
    nob_sb_appendf(&command, "mcopy -o -i %s", vhd_target);
    for (size_t i = 0; i < source_count; ++i)
        nob_sb_appendf(&command, " %s", sources[i]);
    nob_sb_appendf(&command, " ::%s", dst_dir);
    nob_sb_append_null(&command);

    bool ok = run_sync(command.items);
    nob_sb_free(command);
    return ok;
}

// Utility to create a directory in a FAT image using mmd.
bool mmd_dir(const char* vhd_target, const char* dir_path) {
    const char* cmd = nob_temp_sprintf("mmd -i %s ::%s 2>nul", vhd_target, dir_path);
    run_sync(cmd);
    return true;
}

// Writes a 512-byte Connectix VHD Fixed Disk Footer at the end of the file.
static void write_vpc_footer(FILE* f, uint64_t disk_size_bytes) {
    uint8_t footer[512] = {0};

    memcpy(&footer[0], "conectix", 8);

    // Features: 0x00000002 (Big Endian)
    footer[11] = 0x02;

    // File Format Version: 0x00010000
    footer[13] = 0x01;

    // Data Offset: 0xFFFFFFFFFFFFFFFF (Fixed disk)
    memset(&footer[16], 0xFF, 8);

    // Creator Application: "qemu"
    memcpy(&footer[28], "qemu", 4);

    // Creator Version: 0x00020000
    footer[33] = 0x02;

    // Creator Host OS: "Wi2k"
    memcpy(&footer[36], "Wi2k", 4);

    // Original & Current Size (uint64_t Big Endian)
    for (int i = 0; i < 8; i++) {
        uint8_t b = (uint8_t)(disk_size_bytes >> ((7 - i) * 8));
        footer[40 + i] = b;
        footer[48 + i] = b;
    }

    // Geometry for 512MB: 1024 Cylinders (0x0400), 16 Heads, 63 Sectors/Track
    footer[56] = 0x04;
    footer[57] = 0x00;
    footer[58] = 16;
    footer[59] = 63;

    // Disk Type: 2 (Fixed Hard Disk)
    footer[63] = 0x02;

    // Unique ID GUID
    static const uint8_t guid[16] = {
        0xA1, 0xB2, 0xC3, 0xD4, 0xE5, 0xF6, 0x78, 0x90,
        0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC, 0xDE, 0xF0
    };
    memcpy(&footer[68], guid, 16);

    // Checksum: 1's complement sum of all bytes in footer with checksum cleared
    uint32_t sum = 0;
    for (int i = 0; i < 512; i++) {
        sum += footer[i];
    }
    uint32_t checksum = ~sum;

    footer[64] = (uint8_t)(checksum >> 24);
    footer[65] = (uint8_t)(checksum >> 16);
    footer[66] = (uint8_t)(checksum >> 8);
    footer[67] = (uint8_t)(checksum & 0xFF);

    fseek(f, (long)disk_size_bytes, SEEK_SET);
    fwrite(footer, 1, 512, f);
}

// Ensures the managed development VHD carries the stable identity used by boot.ini.
static bool ensure_disk_vhd_signature(void) {
    FILE* f = fopen("disk.vhd", "r+b");
    if (!f) return false;

    uint32_t signature = DEFAULT_VHD_DISK_SIGNATURE;
    if (fseek(f, 440, SEEK_SET) != 0 ||
        fwrite(&signature, sizeof(signature), 1, f) != 1) {
        fclose(f);
        return false;
    }

    fclose(f);
    return true;
}

// Creates a 512 MB partitioned disk.vhd image with a valid VPC footer.
bool create_disk_vhd_if_missing(void) {
    if (nob_file_exists("disk.vhd")) return ensure_disk_vhd_signature();

    nob_log(NOB_INFO, "disk.vhd missing, creating new 512 MB fixed VHD image...");

    const uint64_t disk_size = (uint64_t)512 * 1024 * 1024; // 512 MB Payload
    FILE* f = fopen("disk.vhd", "wb");
    if (!f) {
        nob_log(NOB_ERROR, "Failed to create disk.vhd file!");
        return false;
    }

    // Expand file to 512MB payload
    if (fseek(f, (long)(disk_size - 1), SEEK_SET) != 0) {
        fclose(f);
        return false;
    }
    fputc(0, f);

    // Build standard MBR partition table (Sector 0)
    uint8_t mbr[512] = {0};
    uint32_t disk_signature = DEFAULT_VHD_DISK_SIGNATURE;
    memcpy(&mbr[440], &disk_signature, sizeof(disk_signature));
    mbr[510] = 0x55;
    mbr[511] = 0xAA;

    // Partition 1 Entry: 64MB FAT32 @ LBA 2048 (1MB offset)
    uint8_t* p1 = &mbr[0x01BE];
    p1[0] = 0x80;                            // Active / Bootable
    p1[1] = 0x00; p1[2] = 0x02; p1[3] = 0x00; // CHS Start
    p1[4] = 0x0C;                            // FAT32 LBA
    p1[5] = 0xFE; p1[6] = 0xFF; p1[7] = 0xFF; // CHS End (LBA boundary)
    uint32_t p1_lba = 2048;        
    uint32_t p1_sectors = 131072;            // 64 MB
    memcpy(&p1[8], &p1_lba, 4);
    memcpy(&p1[12], &p1_sectors, 4);

    // Partition 2 Entry: 256MB FAT32 @ LBA 133120 (65MB offset)
    uint8_t* p2 = &mbr[0x01CE];
    p2[0] = 0x00;                            // Inactive
    p2[1] = 0x00; p2[2] = 0x01; p2[3] = 0x08; // CHS Start
    p2[4] = 0x0C;                            // FAT32 LBA
    p2[5] = 0xFE; p2[6] = 0xFF; p2[7] = 0xFF; // CHS End (LBA boundary)
    uint32_t p2_lba = 133120;      
    uint32_t p2_sectors = 524288;            // 256 MB
    memcpy(&p2[8], &p2_lba, 4);
    memcpy(&p2[12], &p2_sectors, 4);

    // Write Sector 0
    fseek(f, 0, SEEK_SET);
    fwrite(mbr, 1, 512, f);

    // Append 512-byte Connectix VPC Footer
    write_vpc_footer(f, disk_size);

    fclose(f);

    nob_log(NOB_INFO, "Formatting disk.vhd partitions with mformat...");
    if (!run_sync("mformat -i " VHD_PART1 " -F")) return false;
    if (!run_sync("mformat -i " VHD_PART2 " -F")) return false;

    return true;
}

// Runs the requested operation.
int main(int argc, char** argv) {
    NOB_GO_REBUILD_URSELF(argc, argv);

    if (!create_disk_vhd_if_missing()) return 1;
    if (!create_usbfatroot_if_missing()) return 1;
    create_layout();
    if (!nob_file_exists("code\\drivers\\fs\\ext4\\third_party\\lwext4\\src\\ext4.c")) {
        nob_log(NOB_ERROR, "lwext4 is not vendored. Run: powershell -ExecutionPolicy Bypass -File code\\drivers\\fs\\ext4\\vendor_lwext4.ps1");
        return 1;
    }
    if (!nob_file_exists("code\\drivers\\fs\\ntfs\\ntfs3g\\third_party\\ntfs-3g\\libntfs-3g\\volume.c")) {
        nob_log(NOB_ERROR, "ntfs-3g is not vendored. Run: powershell -ExecutionPolicy Bypass -File code\\drivers\\fs\\ntfs\\ntfs3g\\vendor_ntfs3g.ps1");
        return 1;
    }
    if (!clean_build_object_directories()) return 1;

    nob_log(NOB_INFO, "--- Building Core Subsystems ---");
    
    const char* core_tasks[] = {
        "ml64 /nologo /c /Foobj\\kernel\\ke_switch.obj code\\kernel\\ke_switch.asm",
        "ml64 /nologo /c /Foobj\\kernel\\ke_syscall_asm.obj code\\kernel\\ke_syscall.asm",
        "ml64 /nologo /c /Foobj\\kernel\\ke_gdt_reload.obj code\\kernel\\ke_gdt_reload.asm",
        "ml64 /nologo /c /Foobj\\syscall\\stubs.obj code\\user\\syscall\\syscall_stubs.asm",
        "ml64 /nologo /DNTL_SYSCALL_STATIC /c /Foobj\\syscall\\stubs_s.obj code\\user\\syscall\\syscall_stubs.asm",
        nob_temp_sprintf("cl %s /DNTL_SYSCALL_BUILD /c /Foobj\\syscall\\pe_loader.obj code\\user\\syscall\\pe_loader.c", UserCflags),
        nob_temp_sprintf("cl %s /DNTL_SYSCALL_STATIC /c /Foobj\\syscall\\pe_loader_s.obj code\\user\\syscall\\pe_loader.c", UserCflags),
        nob_temp_sprintf("cl %s /DNTL_SYSCALL_BUILD /c /Foobj\\syscall\\module_loader.obj code\\user\\syscall\\module_loader.c", UserCflags),
        nob_temp_sprintf("cl %s /DNTL_SYSCALL_STATIC /c /Foobj\\syscall\\module_loader_s.obj code\\user\\syscall\\module_loader.c", UserCflags),
        nob_temp_sprintf("cl %s /DNTL_SYSCALL_BUILD /c /Foobj\\syscall\\process_loader.obj code\\user\\syscall\\process_loader.c", UserCflags),
        nob_temp_sprintf("cl %s /DNTL_SYSCALL_STATIC /c /Foobj\\syscall\\process_loader_s.obj code\\user\\syscall\\process_loader.c", UserCflags),
        nob_temp_sprintf("cl %s /DNTL_SYSCALL_BUILD /c /Foobj\\syscall\\resource.obj code\\user\\syscall\\resource.c", UserCflags),
        nob_temp_sprintf("cl %s /DNTL_SYSCALL_STATIC /c /Foobj\\syscall\\resource_s.obj code\\user\\syscall\\resource.c", UserCflags),
        nob_temp_sprintf("cl %s /DNTL_SYSCALL_BUILD /c /Foobj\\syscall\\input_service.obj code\\user\\syscall\\input_service.c", UserCflags),
        nob_temp_sprintf("cl %s /DNTL_SYSCALL_STATIC /c /Foobj\\syscall\\input_service_s.obj code\\user\\syscall\\input_service.c", UserCflags),
        nob_temp_sprintf("cl %s /DNTL_SYSCALL_BUILD /c /Foobj\\syscall\\console_service.obj code\\user\\syscall\\console_service.c", UserCflags),
        nob_temp_sprintf("cl %s /DNTL_SYSCALL_STATIC /c /Foobj\\syscall\\console_service_s.obj code\\user\\syscall\\console_service.c", UserCflags),
        nob_temp_sprintf("cl %s /DNTL_SYSCALL_BUILD /c /Foobj\\syscall\\desktop.obj code\\user\\syscall\\desktop.c", UserCflags),
        nob_temp_sprintf("cl %s /DNTL_SYSCALL_STATIC /c /Foobj\\syscall\\desktop_s.obj code\\user\\syscall\\desktop.c", UserCflags),
        nob_temp_sprintf("cl %s /DNTL_SYSCALL_BUILD /c /Foobj\\syscall\\path.obj code\\user\\syscall\\path.c", UserCflags),
        nob_temp_sprintf("cl %s /DNTL_SYSCALL_STATIC /c /Foobj\\syscall\\path_s.obj code\\user\\syscall\\path.c", UserCflags),
        "for %f in (code\\boot\\uefi\\*.asm) do ml64 /nologo /c /Fo\"obj\\boot\\%~nf.obj\" \"%f\"",
        
        nob_temp_sprintf("cl %s /MP /c /Foobj\\ code\\common\\printf.c", CommonCflags),
        "cl /nologo /c /Foobj\\libc.obj code\\common\\libc.c",
        nob_temp_sprintf("cl %s /c /Foobj\\runtime\\user_heap.obj code\\user\\runtime\\heap.c", UserCflags),
        nob_temp_sprintf("cl %s /c /Foobj\\runtime\\user_heap_exports.obj code\\user\\runtime\\heap_exports.c", UserCflags),
        nob_temp_sprintf("cl %s /c /Foobj\\runtime\\native_exception.obj code\\user\\runtime\\native_exception.c", UserCflags),
        nob_temp_sprintf("cl %s /c /Foobj\\runtime\\native_start.obj code\\user\\runtime\\native_start.c", UserCflags),
        nob_temp_sprintf("cl %s /c /Foobj\\runtime\\posix_start.obj code\\user\\runtime\\posix_start.c", PosixUserCflags),
        
        // Bootloader.
        nob_temp_sprintf("cl %s /MP /c /Icode\\boot\\uefi\\include /Foobj\\boot\\ code\\boot\\uefi\\*.c code\\common\\boot_volume_selector.c && link %s /FORCE:MULTIPLE /SUBSYSTEM:EFI_APPLICATION /ENTRY:UefiMain /OUT:bin\\bootx64.efi obj\\libc.obj code\\boot\\uefi\\efilib.lib obj\\boot\\*.obj", BootCflags, LFLAGS),
        
        // HAL.
        nob_temp_sprintf("cl %s /DNTL_HAL_BUILD /MP /c /Foobj\\hal\\ code\\kernel\\hal\\*.c && link %s /DLL /FIXED /DYNAMICBASE:NO /HIGHENTROPYVA:NO /RELEASE /BASE:0xFFFF800010000000 /OUT:bin\\hal.dll /NOENTRY /IGNORE:4216 obj\\printf.obj obj\\libc.obj obj\\hal\\*.obj", KernelCflags, LFLAGS),
        
        // Kernel.
        nob_temp_sprintf("cl %s /DKE_DISPLAY_BUILD /MP /c /Foobj\\kernel\\ code\\kernel\\*.c code\\common\\boot_volume_selector.c && link %s /SUBSYSTEM:NATIVE /FIXED /DYNAMICBASE:NO /HIGHENTROPYVA:NO /RELEASE /BASE:0xFFFF800000000000 /ENTRY:KernelMain /OUT:bin\\kernel.exe bin\\hal.lib obj\\printf.obj obj\\libc.obj obj\\kernel\\*.obj", KernelCflags, LFLAGS),
        
        // Subsystem DLLs.
        "link /nologo /SUBSYSTEM:NATIVE /NODEFAULTLIB /DLL " USER_IMAGE_FLAGS_LITERAL " /OUT:bin\\syscall.dll obj\\syscall\\stubs.obj obj\\syscall\\pe_loader.obj obj\\syscall\\module_loader.obj obj\\syscall\\process_loader.obj obj\\syscall\\resource.obj obj\\syscall\\input_service.obj obj\\syscall\\console_service.obj obj\\syscall\\desktop.obj obj\\syscall\\path.obj obj\\libc.obj",
        "lib /nologo /OUT:bin\\syscall_s.lib obj\\syscall\\stubs_s.obj obj\\syscall\\pe_loader_s.obj obj\\syscall\\module_loader_s.obj obj\\syscall\\process_loader_s.obj obj\\syscall\\resource_s.obj obj\\syscall\\input_service_s.obj obj\\syscall\\console_service_s.obj obj\\syscall\\desktop_s.obj obj\\syscall\\path_s.obj",
        nob_temp_sprintf("cl %s /DUSER_HEAP_EXPORTS /DNTL_EXCEPTION_EXPORTS /MP /c /Foobj\\win32\\ code\\user\\runtime\\heap.c code\\user\\runtime\\heap_exports.c code\\user\\runtime\\native_exception.c code\\user\\personalities\\win32\\*.c && link /nologo /SUBSYSTEM:NATIVE /NODEFAULTLIB /DLL " USER_IMAGE_FLAGS_LITERAL " /OUT:bin\\win32.dll bin\\syscall.lib obj\\libc.obj obj\\win32\\*.obj", UserCflags),
        nob_temp_sprintf("cl %s /DNTL_POSIX_BUILD /DUSER_HEAP_EXPORTS /MP /c /Foobj\\posix\\ code\\user\\runtime\\heap.c code\\user\\runtime\\heap_exports.c code\\user\\personalities\\posix\\*.c && link /nologo /SUBSYSTEM:NATIVE /NODEFAULTLIB /DLL " USER_IMAGE_FLAGS_LITERAL " /OUT:bin\\posix.dll bin\\syscall.lib obj\\libc.obj obj\\posix\\*.obj", PosixUserCflags)
    };

    for (size_t i = 0; i < NOB_ARRAY_LEN(core_tasks); i++) {
        if (!run_sync(core_tasks[i])) return 1;
    }

    nob_log(NOB_INFO, "--- Building Bus Drivers ---");
    const char* pci_cmd = nob_temp_sprintf(
        "cl %s /MP /c /Fo%s\\ %s && link /nologo /SUBSYSTEM:NATIVE /NODEFAULTLIB /DLL /OUT:bin\\%s.sys /IMPLIB:bin\\%s.lib /ENTRY:DriverEntry bin\\kernel.lib obj\\printf.obj obj\\libc.obj %s\\*.obj",
        PCI_BUS_DRIVER.cflags, PCI_BUS_DRIVER.obj_dir, PCI_BUS_DRIVER.sources,
        PCI_BUS_DRIVER.name, PCI_BUS_DRIVER.name, PCI_BUS_DRIVER.obj_dir
    );
    if (!run_sync(pci_cmd)) return 1;

    nob_log(NOB_INFO, "--- Compiling Drivers and Apps in Parallel ---");
    Nob_Procs procs = {0};

    for (size_t i = 0; i < NOB_ARRAY_LEN(STANDALONE_DRIVERS); i++) {
        const Driver_Target* driver = &STANDALONE_DRIVERS[i];
        const char* cmd = nob_temp_sprintf(
            "cl %s /MP /c /Fo%s\\ %s && link /nologo /SUBSYSTEM:NATIVE /NODEFAULTLIB /DLL /OUT:bin\\%s.sys /ENTRY:DriverEntry bin\\kernel.lib %s obj\\libc.obj %s\\*.obj",
            driver->cflags, driver->obj_dir, driver->sources, driver->name,
            driver->libs ? driver->libs : "", driver->obj_dir
        );
        nob_da_append(&procs, run_async(cmd));
    }

    Nob_String_Builder sb = {0}, lwip_files = {0};
    if (nob_read_entire_file("code\\drivers\\net\\lwip\\lwip_sources.txt", &sb)) {
        Nob_String_View sv = nob_sv_from_parts(sb.items, sb.count);
        while (sv.count > 0) {
            Nob_String_View line = nob_sv_trim(nob_sv_chop_by_delim(&sv, '\n'));
            if (line.count > 0 && line.data[0] != '#') {
                nob_sb_append_cstr(&lwip_files, "code\\");
                for (size_t i = 0; i < line.count; i++) nob_sb_append_buf(&lwip_files, &(char){line.data[i] == '/' ? '\\' : line.data[i]}, 1);
                nob_sb_append_cstr(&lwip_files, " ");
            }
        }
        nob_sb_append_null(&lwip_files);
        nob_da_append(&procs, run_async(nob_temp_sprintf("cl %s /MP /c /Foobj\\lwip\\ %s && link /nologo /SUBSYSTEM:NATIVE /NODEFAULTLIB /DLL /OUT:bin\\lwip.sys /ENTRY:DriverEntry bin\\kernel.lib obj\\libc.obj obj\\lwip\\*.obj", LwipCflags, lwip_files.items)));
    }

    Nob_String_Builder ext4_sb = {0}, ext4_files = {0};
    if (nob_read_entire_file("code\\drivers\\fs\\ext4\\lwext4_sources.txt", &ext4_sb)) {
        Nob_String_View sv = nob_sv_from_parts(ext4_sb.items, ext4_sb.count);
        while (sv.count > 0) {
            Nob_String_View line = nob_sv_trim(nob_sv_chop_by_delim(&sv, '\n'));
            if (line.count > 0 && line.data[0] != '#') {
                nob_sb_append_cstr(&ext4_files, "code\\");
                for (size_t i = 0; i < line.count; i++) nob_sb_append_buf(&ext4_files, &(char){line.data[i] == '/' ? '\\' : line.data[i]}, 1);
                nob_sb_append_cstr(&ext4_files, " ");
            }
        }
        nob_sb_append_null(&ext4_files);
        nob_da_append(&procs, run_async(nob_temp_sprintf("cl %s /MP /c /Foobj\\ext4\\ %s && link /nologo /SUBSYSTEM:NATIVE /NODEFAULTLIB /DLL /OUT:bin\\ext4.sys /ENTRY:DriverEntry bin\\kernel.lib obj\\libc.obj obj\\ext4\\*.obj", Ext4Cflags, ext4_files.items)));
    }

    Nob_String_Builder ntfs3g_sb = {0}, ntfs3g_files = {0};
    if (nob_read_entire_file("code\\drivers\\fs\\ntfs\\ntfs3g\\ntfs3g_sources.txt", &ntfs3g_sb)) {
        Nob_String_View sv = nob_sv_from_parts(ntfs3g_sb.items, ntfs3g_sb.count);
        while (sv.count > 0) {
            Nob_String_View line = nob_sv_trim(nob_sv_chop_by_delim(&sv, '\n'));
            if (line.count > 0 && line.data[0] != '#') {
                nob_sb_append_cstr(&ntfs3g_files, "code\\");
                for (size_t i = 0; i < line.count; i++) nob_sb_append_buf(&ntfs3g_files, &(char){line.data[i] == '/' ? '\\' : line.data[i]}, 1);
                nob_sb_append_cstr(&ntfs3g_files, " ");
            }
        }
        nob_sb_append_null(&ntfs3g_files);
        nob_da_append(&procs, run_async(nob_temp_sprintf("cl %s /MP /c /Foobj\\ntfs3g\\ %s && link /nologo /SUBSYSTEM:NATIVE /NODEFAULTLIB /DLL /OUT:bin\\ntfs.sys /ENTRY:DriverEntry bin\\kernel.lib obj\\printf.obj obj\\libc.obj obj\\ntfs3g\\*.obj", Ntfs3gCflags, ntfs3g_files.items)));
    }


    const char* apps[][4] = {
        {"system\\init", NATIVE_INIT_LIBS_LITERAL, "init", "/ENTRY:_start"},
        {"system\\rssrv", NATIVE_SERVICE_LIBS_LITERAL, "rssrv", "/ENTRY:_start"},
        {"system\\posixsrv", NATIVE_SERVICE_LIBS_LITERAL, "posixsrv", "/ENTRY:_start"},
        {"system\\dwm", NATIVE_SERVICE_LIBS_LITERAL, "dwm", "/ENTRY:_start"},
        {"tests\\all_tests", NATIVE_EXE_LIBS_LITERAL, "all_tests", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\posix_service_smoke", NATIVE_EXE_LIBS_LITERAL, "posix_service_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"apps\\shell_win32", WIN32_EXE_LIBS_LITERAL, "shell_win32", NATIVE_EXE_ENTRY_LITERAL},
        {"apps\\shell_posix", POSIX_EXE_LIBS_LITERAL, "shell_posix", "/ENTRY:PosixStart"},
        {"apps\\shell_native", NATIVE_EXE_LIBS_LITERAL, "shell_native", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\async_apc", NATIVE_EXE_LIBS_LITERAL, "async_apc", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\apc_return_smoke", NATIVE_EXE_LIBS_LITERAL, "apc_return_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\async_cancel", NATIVE_EXE_LIBS_LITERAL, "async_cancel", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\file_stat_smoke", NATIVE_EXE_LIBS_LITERAL, "file_stat_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\handle_dup_smoke", NATIVE_EXE_LIBS_LITERAL, "handle_dup_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\security_smoke", NATIVE_EXE_LIBS_LITERAL, "security_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\port_ipc_smoke", NATIVE_EXE_LIBS_LITERAL, "port_ipc_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\resource_service_smoke", NATIVE_EXE_LIBS_LITERAL, "resource_service_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\named_queue_lifetime_smoke", NATIVE_EXE_LIBS_LITERAL, "named_queue_lifetime_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\input_api_smoke", NATIVE_EXE_LIBS_LITERAL, "input_api_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\input_model_smoke", NATIVE_EXE_LIBS_LITERAL, "input_model_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\input_service_smoke", NATIVE_EXE_LIBS_LITERAL, "input_service_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\console_service_smoke", NATIVE_EXE_LIBS_LITERAL, "console_service_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\desktop_smoke", NATIVE_EXE_LIBS_LITERAL, "desktop_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\timer_smoke", NATIVE_EXE_LIBS_LITERAL, "timer_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\stats_abi_smoke", NATIVE_EXE_LIBS_LITERAL, "stats_abi_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\realpath_smoke", NATIVE_EXE_LIBS_LITERAL, "realpath_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\file_lock_smoke", NATIVE_EXE_LIBS_LITERAL, "file_lock_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\process_protection_smoke", NATIVE_EXE_LIBS_LITERAL, "process_protection_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\process_exit_multithread_smoke", NATIVE_EXE_LIBS_LITERAL, "process_exit_multithread_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\thread_name_smoke", NATIVE_EXE_LIBS_LITERAL, "thread_name_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\process_builder_smoke", "bin\\syscall_s.lib obj\\libc.obj " NATIVE_RUNTIME_OBJS_LITERAL, "process_builder_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\socket_addr_smoke", NATIVE_EXE_LIBS_LITERAL, "socket_addr_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\net_irp_smoke", NATIVE_EXE_LIBS_LITERAL, "net_irp_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\module_load_smoke", NATIVE_EXE_LIBS_LITERAL, "module_load_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\posix_module_smoke", POSIX_EXE_LIBS_LITERAL, "posix_module_smoke", "/ENTRY:PosixStart"},
        {"tests\\posix_runtime_smoke", POSIX_EXE_LIBS_LITERAL, "posix_runtime_smoke", "/ENTRY:PosixStart"},
        {"tests\\posix_fd_smoke", POSIX_EXE_LIBS_LITERAL, "posix_fd_smoke", "/ENTRY:PosixStart"},
        {"tests\\posix_pipe_smoke", POSIX_EXE_LIBS_LITERAL, "posix_pipe_smoke", "/ENTRY:PosixStart"},
        {"tests\\exception_dispatcher_smoke", NATIVE_EXE_LIBS_LITERAL, "exception_dispatcher_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\native_exception_runtime_smoke", NATIVE_EXE_LIBS_LITERAL, "native_exception_runtime_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\native_raise_exception_smoke", NATIVE_EXE_LIBS_LITERAL, "native_raise_exception_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\exception_smoke", NATIVE_EXE_LIBS_LITERAL, "exception_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\win32_exception_smoke", WIN32_EXE_LIBS_LITERAL, "win32_exception_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\win32_seh_smoke", WIN32_EXE_LIBS_LITERAL, "win32_seh_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\syscall_contract_smoke", NATIVE_EXE_LIBS_LITERAL, "syscall_contract_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\would_block_smoke", NATIVE_EXE_LIBS_LITERAL, "would_block_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\audio_stream_smoke", NATIVE_EXE_LIBS_LITERAL, "audio_stream_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\winmm_waveout_smoke", WIN32_EXE_LIBS_LITERAL, "winmm_waveout_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\win32_condition_variable_smoke", WIN32_EXE_LIBS_LITERAL, "win32_condition_variable_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\win32_mutex_smoke", WIN32_EXE_LIBS_LITERAL, "win32_mutex_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\win32_thread_suspend_smoke", WIN32_EXE_LIBS_LITERAL, "win32_thread_suspend_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\win32_module_lookup_smoke", WIN32_EXE_LIBS_LITERAL, "win32_module_lookup_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\cwd_userspace_smoke", NATIVE_EXE_LIBS_LITERAL, "cwd_userspace_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\mmap_smoke", NATIVE_EXE_LIBS_LITERAL, "mmap_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\pcache_smoke", NATIVE_EXE_LIBS_LITERAL, "pcache_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\pcache_pressure", NATIVE_EXE_LIBS_LITERAL, "pcache_pressure", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\dirty_writeback", NATIVE_EXE_LIBS_LITERAL, "dirty_writeback", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\shared_mmap", NATIVE_EXE_LIBS_LITERAL, "shared_mmap", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\pcache_invalidate", NATIVE_EXE_LIBS_LITERAL, "pcache_invalidate", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\pcache_mmap_read_reuse", NATIVE_EXE_LIBS_LITERAL, "pcache_mmap_read_reuse", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\pcache_multithread", NATIVE_EXE_LIBS_LITERAL, "pcache_multithread", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\surface_smoke", NATIVE_EXE_LIBS_LITERAL, "surface_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\surface_invalid_rect", NATIVE_EXE_LIBS_LITERAL, "surface_invalid_rect", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\surface_multithread_commit", NATIVE_EXE_LIBS_LITERAL, "surface_multithread_commit", NATIVE_EXE_ENTRY_LITERAL},
        {"tests\\surface_cross_process_smoke", NATIVE_EXE_LIBS_LITERAL, "surface_cross_process_smoke", NATIVE_EXE_ENTRY_LITERAL},
        {"apps\\edit", NATIVE_EXE_LIBS_LITERAL, "edit", NATIVE_EXE_ENTRY_LITERAL},
        {"apps\\httpget", NATIVE_EXE_LIBS_LITERAL, "httpget", NATIVE_EXE_ENTRY_LITERAL},
        {"apps\\tcpserve", NATIVE_EXE_LIBS_LITERAL, "tcpserve", NATIVE_EXE_ENTRY_LITERAL},
        {"apps\\udp", NATIVE_EXE_LIBS_LITERAL, "udp", NATIVE_EXE_ENTRY_LITERAL},
        {"apps\\resolve", NATIVE_EXE_LIBS_LITERAL, "resolve", NATIVE_EXE_ENTRY_LITERAL},
        {"apps\\ping", NATIVE_EXE_LIBS_LITERAL, "ping", NATIVE_EXE_ENTRY_LITERAL},
        {"apps\\doom", NATIVE_EXE_LIBS_LITERAL, "doom", NATIVE_EXE_ENTRY_LITERAL},
        {"apps\\video", "bin\\syscall.lib obj\\libc.obj " NATIVE_RUNTIME_OBJS_LITERAL " code\\user\\apps\\video\\bink2w64.lib", "video", NATIVE_EXE_ENTRY_LITERAL},
        {"apps\\memtop", NATIVE_EXE_LIBS_LITERAL, "memtop", NATIVE_EXE_ENTRY_LITERAL}
    };

    for (size_t i = 0; i < NOB_ARRAY_LEN(apps); i++) {
        const char* appCflags = strcmp(apps[i][3], "/ENTRY:PosixStart") == 0
            ? PosixUserCflags
            : UserCflags;
        const char* cmd = nob_temp_sprintf(
            "cl %s /MP /c /Foobj\\%s\\ code\\user\\%s\\*.c && link %s /SUBSYSTEM:NATIVE " USER_IMAGE_FLAGS_LITERAL " %s /OUT:bin\\%s.exe /PDB:bin\\%s.pdb %s obj\\%s\\*.obj",
            appCflags, apps[i][2], apps[i][0], LFLAGS, apps[i][3], apps[i][2], apps[i][2], apps[i][1], apps[i][2]
        );
        nob_da_append(&procs, run_async(cmd));
    }

    if (!nob_procs_wait(procs)) {
        nob_log(NOB_ERROR, "One or more parallel build jobs failed!");
        return 1;
    }

    // 4. Formatting and Packing VHD via mtools (No Admin, Fast).
    nob_log(NOB_INFO, "--- Formatting & Packing disk.vhd with mtools ---");
    
    run_sync("mformat -i " VHD_PART1 " -F");
    run_sync("mformat -i " VHD_PART2 " -F");

    mmd_dir(VHD_PART1, "EFI");
    mmd_dir(VHD_PART1, "EFI/BOOT");
    mmd_dir(VHD_PART1, "EFI/NTLite");
    mmd_dir(VHD_PART1, "EFI/NTLite/fs");
    mmd_dir(VHD_PART2, "apps");
    mmd_dir(VHD_PART2, "system");
    mmd_dir(VHD_PART2, "drivers");
    mmd_dir(VHD_PART2, "tests");

    // The ESP is only the boot anchor; the configured system volume carries the OS payload.
    if (!mcopy_file("bin\\bootx64.efi", VHD_PART1, "EFI/BOOT/bootx64.efi")) return 1;
    if (!mcopy_file("code\\boot.ini", VHD_PART1, "boot.ini")) return 1;
    if (!run_sync("if exist code\\boot\\uefi\\fs\\*.efi mcopy -o -i " VHD_PART1 " code\\boot\\uefi\\fs\\*.efi ::EFI/NTLite/fs/")) return 1;

    if (!mcopy_file("bin\\kernel.exe", VHD_PART2, "system/colonel.exe")) return 1;

    const char* system_files[] = {
        "bin\\hal.dll",
        "bin\\syscall.dll",
        "bin\\win32.dll",
        "bin\\posix.dll",
        "code\\settings.ini",
        "code\\services.ini",
        "bin\\init.exe",
        "bin\\rssrv.exe",
        "bin\\posixsrv.exe",
        "bin\\dwm.exe",
    };
    if (!mcopy_files_to_dir(VHD_PART2, "system/", system_files, NOB_ARRAY_LEN(system_files))) return 1;

    const char* driver_files[] = {
        "bin\\pci.sys",
        "bin\\ps2.sys",
        "bin\\hda.sys",
        "bin\\ata.sys",
        "bin\\ahci.sys",
        "bin\\fat.sys",
        "bin\\ntfs.sys",
        "bin\\ext4.sys",
        "bin\\vmwaresvga.sys",
        "bin\\lwip.sys",
        "bin\\usb.sys",
        "bin\\rtl816x.sys",
        "bin\\rtl8139.sys",
        "code\\drivers\\drivers.ini",
    };
    if (!mcopy_files_to_dir(VHD_PART2, "drivers/", driver_files, NOB_ARRAY_LEN(driver_files))) return 1;
    // The build artifact keeps the descriptive target name; the installed serial driver gets the cereal joke.
    if (!mcopy_file("bin\\serial.sys", VHD_PART2, "drivers/cereal.sys")) return 1;

    const char* app_files[] = {
        "bin\\shell_win32.exe",
        "bin\\shell_posix.exe",
        "bin\\shell_native.exe",
        "bin\\edit.exe",
        "bin\\httpget.exe",
        "bin\\tcpserve.exe",
        "bin\\udp.exe",
        "bin\\resolve.exe",
        "bin\\ping.exe",
        "bin\\doom.exe",
        "bin\\video.exe",
        "bin\\memtop.exe",
    };
    if (!mcopy_files_to_dir(VHD_PART2, "apps/", app_files, NOB_ARRAY_LEN(app_files))) return 1;

    const char* test_files[] = {
        "bin\\all_tests.exe",
        "bin\\posix_service_smoke.exe",
        "bin\\async_apc.exe",
        "bin\\async_cancel.exe",
        "bin\\apc_return_smoke.exe",
        "bin\\file_stat_smoke.exe",
        "bin\\handle_dup_smoke.exe",
        "bin\\security_smoke.exe",
        "bin\\port_ipc_smoke.exe",
        "bin\\resource_service_smoke.exe",
        "bin\\named_queue_lifetime_smoke.exe",
        "bin\\input_api_smoke.exe",
        "bin\\input_model_smoke.exe",
        "bin\\input_service_smoke.exe",
        "bin\\console_service_smoke.exe",
        "bin\\desktop_smoke.exe",
        "bin\\timer_smoke.exe",
        "bin\\stats_abi_smoke.exe",
        "bin\\realpath_smoke.exe",
        "bin\\file_lock_smoke.exe",
        "bin\\process_protection_smoke.exe",
        "bin\\process_exit_multithread_smoke.exe",
        "bin\\thread_name_smoke.exe",
        "bin\\process_builder_smoke.exe",
        "bin\\socket_addr_smoke.exe",
        "bin\\net_irp_smoke.exe",
        "bin\\module_load_smoke.exe",
        "bin\\posix_module_smoke.exe",
        "bin\\posix_runtime_smoke.exe",
        "bin\\posix_fd_smoke.exe",
        "bin\\posix_pipe_smoke.exe",
        "bin\\exception_dispatcher_smoke.exe",
        "bin\\native_exception_runtime_smoke.exe",
        "bin\\native_raise_exception_smoke.exe",
        "bin\\exception_smoke.exe",
        "bin\\win32_exception_smoke.exe",
        "bin\\win32_seh_smoke.exe",
        "bin\\syscall_contract_smoke.exe",
        "bin\\would_block_smoke.exe",
        "bin\\audio_stream_smoke.exe",
        "bin\\winmm_waveout_smoke.exe",
        "bin\\win32_condition_variable_smoke.exe",
        "bin\\win32_mutex_smoke.exe",
        "bin\\win32_thread_suspend_smoke.exe",
        "bin\\win32_module_lookup_smoke.exe",
        "bin\\cwd_userspace_smoke.exe",
        "bin\\mmap_smoke.exe",
        "bin\\pcache_smoke.exe",
        "bin\\pcache_pressure.exe",
        "bin\\dirty_writeback.exe",
        "bin\\shared_mmap.exe",
        "bin\\pcache_invalidate.exe",
        "bin\\pcache_mmap_read_reuse.exe",
        "bin\\pcache_multithread.exe",
        "bin\\surface_smoke.exe",
        "bin\\surface_invalid_rect.exe",
        "bin\\surface_multithread_commit.exe",
        "bin\\surface_cross_process_smoke.exe",
    };
    if (!mcopy_files_to_dir(VHD_PART2, "tests/", test_files, NOB_ARRAY_LEN(test_files))) return 1;

    const char* optional_app_files[3];
    size_t optional_app_count = 0;
    if (nob_file_exists("code\\user\\apps\\video\\bink2w64.dll"))
        optional_app_files[optional_app_count++] = "code\\user\\apps\\video\\bink2w64.dll";
    if (nob_file_exists("code\\user\\apps\\video\\video.bk2"))
        optional_app_files[optional_app_count++] = "code\\user\\apps\\video\\video.bk2";
    if (nob_file_exists("code\\user\\apps\\doom\\doom1.wad"))
        optional_app_files[optional_app_count++] = "code\\user\\apps\\doom\\doom1.wad";
    if (!mcopy_files_to_dir(VHD_PART2, "apps/", optional_app_files, optional_app_count)) return 1;

    nob_log(NOB_INFO, "Build complete!");
    return 0;
}