module Libc [system] {
  link "c"
  config_macros _ALL_SOURCE,_BSD_SOURCE,_GNU_SOURCE,_KERNEL,_POSIX_C_SOURCE,_POSIX_SOURCE,_XOPEN_SOURCE

  module C [extern_c] {
    textual header "assert.h" // POSIX/C89

    module alloca { // POSIX
      header "alloca.h"
      export *
    }
    module byteswap { // GNU extension
      header "byteswap.h"
      export *
    }
    module complex { // C99
      header "complex.h"
      export *
    }
    module ctype { // C89
      header "ctype.h"
      export *
    }
    module err { // BSD extension
      header "err.h"
      export *
    }
    module errno { // POSIX/C89
      header "errno.h"
      export *
    }
    module features { // POSIX?
      textual header "features.h"
      export *
    }
    module fenv { // C99
      header "fenv.h"
      export *
    }
    module float { // C/POSIX
      header "float.h"
      export *
    }
    module inttypes { // C99
      header "inttypes.h"
      export *
    }
    module iso646 { // C95
      header "iso646.h"
      export *
    }
    module limits { // C99
      header "limits.h"
      export *
    }
    module locale { // C90?
      header "locale.h"
      export *
    }
    module malloc { // C89
      header "malloc.h"
      export *
    }
    module math { // C89
      header "math.h"
      export *
    }
    module memory { // Legacy header
      export string
    }
    module setjmp {  // C89/POSIX
      header "setjmp.h"
      export *
    }
    module signal { // C89/POSIX
      header "signal.h"
      export *
    }
    // defined in clang
    // module stdatomic { // C11
    //    header "stdatomic.h"
    //    export *
    // }
    module stdalign { // C11
      header "stdalign.h"
      export *
    }
    module stdarg { // C89
      header "stdarg.h"
      export *
    }
    module stdbool { // C99
      header "stdbool.h"
      export *
    }
    module stdint { // C99
      header "stdint.h" // This might be deleted in favor of clang provided version
      export *
    }
    module stdio { // C89
      header "stdio.h"
      export *
    }
    module stdlib { // C89
      header "stddef.h"
      header "stdlib.h"
      export malloc // HACK: Our stdlib re-defines some other functions from other headers
      export *
    }
    module stdnoreturn { // C11
      header "stdnoreturn.h"
      export *
    }
    module string { // C89
      header "string.h"
      export *
    }
    module threads { // C11
      header "threads.h"
      export *
    }
    module time {
      header "time.h"
      export *
    }
    module uchar { // C11
      header "uchar.h"
      export *
    }
    module wchar { // C89
      header "wchar.h"
      export *
    }
    module wctype { // C89
      header "wctype.h"
      export *
    }
    export *
  }
  module POSIX [extern_c]  {
    module ar { // GNU?
      header "ar.h"
      export *
    }
    module cpio { // POSIX?
      header "cpio.h"
      export *
    }
    module dirent { // POSIX
      header "dirent.h"
      export *
    }
    module dlfcn { // POSIX
      header "dlfcn.h"
      export *
    }
    module elf { // BSD/Linux
      header "elf.h"
      export *
    }
    module endian { // POSIX
      header "endian.h"
      export *
    }
    module fcntl { // POSIX
      header "fcntl.h"
      export *
    }
    module fmtmsg { // POSIX
      header "fmtmsg.h"
      export *
    }
    module fnmatch { // POSIX
      header "fnmatch.h"
      export *
    }
    module getopt { // POSIX
      header "getopt.h"
      export *
    }
    module glob { // POSIX
      header "glob.h"
      export *
    }
    module iconv { // POSIX
      header "iconv.h"
      export *
    }
    module ifaddrs { // POSIX
      header "ifaddrs.h"
      export *
    }
    module langinfo { // POSIX
      header "langinfo.h"
      export *
    }
    module libgen { // POSIX
      header "libgen.h"
      export *
    }
    module "link" { // POSIX (quoted because `link` is a reserved keyword)
      header "link.h"
      export *
    }
    module monetary { // POSIX
      header "monetary.h"
      export *
    }
    module netdb { // POSIX
      header "netdb.h"
      export *
    }
    module nl_types { // POSIX
      header "nl_types.h" // Unimplemented in Fuchsia
      export *
    }
    module poll { // POSIX
      header "poll.h"
      export *
    }
    module pthread { // POSIX
      header "pthread.h"
      export *
    }
    module regex { // POSIX
      header "regex.h"
      export *
    }
    module resolv { // POSIX
      header "resolv.h"
      export *
    }
    module sched { // POSIX
      header "sched.h"
      export Libc.C.string // HACK: redefines some functions from string.h with _GNU_SOURCE
      export *
    }
    module search { // POSIX
      header "search.h"
      export *
    }
    module semaphore { // POSIX
      header "semaphore.h" // sem_open is unimplemented on Fuchisa
      export *
    }
    module strings { // POSIX
      header "strings.h"
      export *
    }
    module stropts { // POSIX
      header "stropts.h"
      export *
    }
    module sysexits { // POSIX
      header "sysexits.h"
      export *
    }
    module tar { // POSIX
      header "tar.h"
      export *
    }
    module unistd { // POSIX
      header "unistd.h"
      export *
      export C.stdio // HACK: both stdio and unistd define ssize_t (depending on _GNU_SOURCE)
    }
    module utime { // POSIX
      header "utime.h"
      export *
    }
    module values {
      header "values.h"
      export *
    }
    module wait { // Legacy
      export sys.wait
    }
    module wordexp { // POSIX
      header "wordexp.h"
      export *
    }

    // Folders
    module arpa {
      module ftp {
        header "arpa/ftp.h"
        export *
      }
      module inet {
        header "arpa/inet.h"
        export *
      }
      module nameser {
        header "arpa/nameser.h"
        export *
      }
      module nameser_compat {
        header "arpa/nameser_compat.h"
        export *
      }
      module telnet {
        header "arpa/telnet.h"
        export *
      }
      module tftp {
        header "arpa/tftp.h"
        export *
      }
      export *
    }
    module net {
      module ethernet {
        header "net/ethernet.h"
        export *
      }
      module if_arp {
        header "net/if_arp.h"
        export *
      }
      module if {
        header "net/if.h"
        export *
      }
      module route {
        header "net/if.h"
        export *
      }
      export *
    }
    module netinet {
      module ether {
        header "netinet/ether.h"
        export *
      }
      module icmp6 {
        header "netinet/icmp6.h"
        export *
      }
      module if_ether {
        header "netinet/if_ether.h"
        export *
      }
      module igmp {
        header "netinet/igmp.h"
        export *
      }
      module in {
        header "netinet/in.h"
        export *
      }
      module in_systm {
        header "netinet/in_systm.h"
        export *
      }
      module ip {
        header "netinet/ip.h"
        export *
      }
      module ip6 {
        header "netinet/ip6.h"
        export *
      }
      module ip_icmp {
        header "netinet/ip_icmp.h"
        export *
      }
      module tcp {
        header "netinet/tcp.h"
        export *
      }
      module udp {
        header "netinet/udp.h"
        export *
      }
      export *
    }
    module netpacket {
      module packet {
        header "netpacket/packet.h"
        export *
      }
      export *
    }
    module sys { // TODO(zbowling): this incomplete
      module file {
        header "sys/file.h"
        export *
      }
      module ioctl {
        header "sys/ioctl.h"
        export *
      }
      module ipc {
        header "sys/ipc.h"
        export *
      }
      module mman {
        header "sys/mman.h"
        export *
      }
      module msg {
        header "sys/msg.h"
        export *
      }
      module select {
        header "sys/select.h"
        export *
      }
      module socket {
        header "sys/socket.h"
        export *
      }
      module sem {
        header "sys/sem.h"
        export *
      }
      module sendfile {
        header "sys/sendfile.h"
        export *
      }
      module shm {
        header "sys/shm.h"
        export *
      }
      module stat {
        header "sys/stat.h"
        export *
      }
      module statfs {
        header "sys/statfs.h"
        export *
      }
      module statvfs {
        header "sys/statvfs.h"
        export *
      }
      module time {
        header "sys/time.h"
        export *
      }
      module times {
        header "sys/times.h"
        export *
      }
      module types {
        header "sys/types.h"
        export *
      }
      module uio {
        header "sys/uio.h"
        export *
      }
      module un {
        header "sys/un.h"
        export *
      }
      module utsname {
        header "sys/utsname.h"
        export *
      }
      module wait {
        header "sys/wait.h"
        export *
      }
      export *
    }
    export *
  }
  export *
}

// Headers that exist that are part of POSIX, C, or GNU that are not functional on Fuchsia
module NonLibc [extern_c] {
  use Libc

  module crypt { // POSIX
    header "crypt.h"
    export *
  }
  module ftw { // POSIX
    header "ftw.h"
    export *
  }
  module grp { // POSIX
    header "grp.h" // Non-functional in Fuchsia
    export *
  }
  module mntent { // Unimplemented - common header
    header "mntent.h" // Unimplemented in Fuchsia
    export *
  }
  module paths { // GNU extension
    header "paths.h" // Defines paths are not correct for Fuchsia
    export *
  }
  module pty { // BSD defined (also GLIBC).
    header "pty.h" // Non-functional on Fuchsia
    export *
  }
  module pwd { // POSIX
    header "pwd.h" // Non-functional in Fuchsia
    export *
  }
  module shadown { // POSIX
    header "shadow.h"
    export *
  }
  module spawn { // POSIX
    header "spawn.h" // Process management - use launchpad instead
    export *
  }
  module syslog { // POSIX
    header "syslog.h"
    export *
  }
  module termios { // POSIX
    header "termios.h"
    export *
  }
  module ucontext { // POSIX
    header "ucontext.h"
    export *
  }
  export *
}