Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 889 insertions, 0 deletions

diff --git a/REORG.TODO/posix/annexc.c b/REORG.TODO/posix/annexc.c
new file mode 100644
index 0000000000..6fe9e04359
--- /dev/null
+++ b/REORG.TODO/posix/annexc.c
@@ -0,0 +1,889 @@
+/* Copyright (C) 1998-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <ctype.h>
+#include <fnmatch.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <signal.h>
+#include <sys/wait.h>
+
+#define HEADER_MAX          256
+
+static const char *macrofile;
+
+/* <aio.h>.  */
+static const char *const aio_syms[] =
+{
+  "AIO_ALLDONE", "AIO_CANCELED", "AIO_NOTCANCELED", "LIO_NOP", "LIO_NOWAIT",
+  "LIO_READ", "LIO_WAIT", "LIO_WRITE",
+  /* From <fcntl.h>.  */
+  "FD_CLOEXEC", "F_DUPFD", "F_GETFD", "F_GETFL", "F_GETLK", "F_RDLCK",
+  "F_SETFD", "F_SETFL", "F_SETLK", "F_SETLKW", "F_UNLCK", "F_WRLCK",
+  "O_ACCMODE", "O_APPEND", "O_CREAT", "O_DSYNC", "O_EXCL", "O_NOCTTY",
+  "O_NONBLOCK", "O_RDONLY", "O_RDWR", "O_RSYNC", "O_SYNC", "O_TRUNC",
+  "O_WRONLY",
+  /* From <signal.h>.  */
+  "SA_NOCLDSTOP", "SA_SIGINFO", "SIGABRT", "SIGALRM", "SIGBUS", "SIGCHLD",
+  "SIGCONT", "SIGEV_NONE", "SIGEV_SIGNAL", "SIGEV_SIGNAL", "SIGEV_THREAD",
+  "SIGFPE", "SIGHUP", "SIGILL", "SIGINT", "SIGKILL", "SIGPIPE", "SIGQUIT",
+  "SIGRTMAX", "SIGRTMIN", "SIGSEGV", "SIGSTOP", "SIGTERM", "SIGTSTP",
+  "SIGTTIN", "SIGTTOU", "SIGUSR1", "SIGUSR2", "SIG_BLOCK", "SIG_DFL",
+  "SIG_ERR", "SIG_IGN", "SIG_SETMASK", "SIG_UNBLOCK", "SI_ASYNCIO",
+  "SI_MESGQ", "SI_QUEUE", "SI_TIMER", "SI_USER"
+};
+static const char *const aio_maybe[] =
+{
+  "aio_cancel", "aio_error", "aio_fsync", "aio_read", "aio_return",
+  "aio_suspend", "aio_write", "lio_listio",
+  /* From <fcntl.h>.  */
+  "creat", "fcntl", "open", "SEEK_CUR", "SEEK_END", "SEEK_SET", "S_IRGRP",
+  "S_IROTH", "S_IRUSR", "S_IRWXG", "S_IRWXO", "S_IRWXU", "S_ISBLK",
+  "S_ISCHR", "S_ISDIR", "S_ISFIFO", "S_ISGID", "S_ISREG", "S_ISUID",
+  "S_IWGRP", "S_IWOTH", "S_IWUSR", "S_IXGRP", "S_IXOTH", "S_IXUSR",
+  /* From <signal.h>.  */
+  "kill", "raise", "sigaction", "sigaddset", "sigdelset", "sigemptyset",
+  "sigfillset", "sigismember", "signal", "sigpending", "sigprocmask",
+  "sigqueue", "sigsuspend", "sigtimedwait", "sigwait", "sigwaitinfo"
+};
+
+/* <assert.h>.  */
+static const char *const assert_syms[] =
+{
+  "assert"
+};
+static const char *const assert_maybe[] =
+{
+};
+
+/* <ctype.h>.   */
+static const char *const ctype_syms[] =
+{
+};
+static const char *const ctype_maybe[] =
+{
+  "isalnum", "isalpha", "iscntrl", "isdigit", "isgraph", "islower",
+  "isprint", "ispunct", "isspace", "isupper", "isxdigit", "tolower",
+  "toupper"
+};
+
+/* <dirent.h>.  */
+static const char *const dirent_syms[] =
+{
+};
+static const char *const dirent_maybe[] =
+{
+  "closedir", "opendir", "readdir", "readdir_r", "rewinddir"
+};
+
+/* <errno.h>.  */
+static const char *const errno_syms[] =
+{
+  "E2BIG", "EACCES", "EAGAIN", "EBADF", "EBADMSG", "EBUSY", "ECANCELED",
+  "ECHILD", "EDEADLK", "EDOM", "EEXIST", "EFAULT", "EFBIG", "EINPROGRESS",
+  "EINTR", "EINVAL", "EIO", "EISDIR", "EMFILE", "EMLINK", "EMSGSIZE",
+  "ENAMETOOLONG", "ENFILE", "ENODEV", "ENOENT", "ENOEXEC", "ENOLCK",
+  "ENOMEM", "ENOSPC", "ENOSYS", "ENOTDIR", "ENOTEMPTY", "ENOTSUP",
+  "ENOTTY", "ENXIO", "EPERM", "EPIPE", "ERANGE", "EROFS", "ESPIPE",
+  "ESRCH", "ETIMEDOUT", "EXDEV"
+};
+static const char *const errno_maybe[] =
+{
+  "errno", "E*"
+};
+
+/* <fcntl.h>.  */
+static const char *const fcntl_syms[] =
+{
+  "FD_CLOEXEC", "F_DUPFD", "F_GETFD", "F_GETFL", "F_GETLK", "F_RDLCK",
+  "F_SETFD", "F_SETFL", "F_SETLK", "F_SETLKW", "F_UNLCK", "F_WRLCK",
+  "O_ACCMODE", "O_APPEND", "O_CREAT", "O_DSYNC", "O_EXCL", "O_NOCTTY",
+  "O_NONBLOCK", "O_RDONLY", "O_RDWR", "O_RSYNC", "O_SYNC", "O_TRUNC",
+  "O_WRONLY"
+};
+static const char *const fcntl_maybe[] =
+{
+  "creat", "fcntl", "open", "SEEK_CUR", "SEEK_END", "SEEK_SET", "S_IRGRP",
+  "S_IROTH", "S_IRUSR", "S_IRWXG", "S_IRWXO", "S_IRWXU", "S_ISBLK",
+  "S_ISCHR", "S_ISDIR", "S_ISFIFO", "S_ISGID", "S_ISREG", "S_ISUID",
+  "S_IWGRP", "S_IWOTH", "S_IWUSR", "S_IXGRP", "S_IXOTH", "S_IXUSR"
+};
+
+/* <float.h>.  */
+static const char *const float_syms[] =
+{
+  "DBL_DIG", "DBL_EPSILON", "DBL_MANT_DIG", "DBL_MAX", "DBL_MAX_10_EXP",
+  "DBL_MAX_EXP", "DBL_MIN", "DBL_MIN_10_EXP", "DBL_MIN_EXP", "FLT_DIG",
+  "FLT_EPSILON", "FLT_MANT_DIG", "FLT_MAX", "FLT_MAX_10_EXP", "FLT_MAX_EXP",
+  "FLT_MIN", "FLT_MIN_10_EXP", "FLT_MIN_EXP", "FLT_RADIX", "FLT_ROUNDS",
+  "LDBL_DIG", "LDBL_EPSILON", "LDBL_MANT_DIG", "LDBL_MAX", "LDBL_MAX_10_EXP",
+  "LDBL_MAX_EXP", "LDBL_MIN", "LDBL_MIN_10_EXP", "LDBL_MIN_EXP"
+};
+static const char *const float_maybe[] =
+{
+};
+
+/* <grp.h>.  */
+static const char *const grp_syms[] =
+{
+};
+static const char *const grp_maybe[] =
+{
+  "getgrgid", "getgrgid_r", "getgrnam", "getgrnam_r"
+};
+
+/* <limits.h>.  */
+static const char *const limits_syms[] =
+{
+  "_POSIX_AIO_LISTIO_MAX", "_POSIX_AIO_MAX", "_POSIX_ARG_MAX",
+  "_POSIX_CHILD_MAX", "_POSIX_CLOCKRES_MAX", "_POSIX_DELAYTIMER_MAX",
+  "_POSIX_LINK_MAX", "_POSIX_LOGIN_NAME_MAX", "_POSIX_MAX_CANON",
+  "_POSIX_MAX_INPUT", "_POSIX_MQ_OPEN_MAX", "_POSIX_MQ_PRIO_MAX",
+  "_POSIX_NAME_MAX", "_POSIX_NGROUPS_MAX", "_POSIX_OPEN_MAX",
+  "_POSIX_PATH_MAX", "_POSIX_PIPE_BUF", "_POSIX_RTSIG_MAX",
+  "_POSIX_SEM_NSEMS_MAX", "_POSIX_SEM_VALUE_MAX", "_POSIX_SIGQUEUE_MAX",
+  "_POSIX_SSIZE_MAX", "_POSIX_STREAM_MAX",
+  "_POSIX_THREAD_DESTRUCTOR_ITERATIONS", "_POSIX_THREAD_KEYS_MAX",
+  "_POSIX_THREAD_THREADS_MAX", "_POSIX_TIMER_MAX", "_POSIX_TTY_NAME_MAX",
+  "_POSIX_TZNAME_MAX", "_POSIX_THREAD_DESTRUCTOR_ITERATIONS",
+  "CHAR_BIT", "CHAR_MAX", "CHAR_MIN", "INT_MAX", "INT_MIN", "LONG_MAX",
+  "LONG_MIN", "MB_LEN_MAX", "NGROUPS_MAX", "PAGESIZE", "SCHAR_MAX",
+  "SCHAR_MIN", "SHRT_MAX", "SHRT_MIN", "UCHAR_MAX", "UINT_MAX",
+  "ULONG_MAX", "USHRT_MAX"
+};
+static const char *const limits_maybe[] =
+{
+  "AIO_LISTIO_MAX", "AIO_MAX", "ARG_MAX", "CHILD_MAX", "DELAYTIMER_MAX",
+  "LINK_MAX", "LOGIN_NAME_MAX", "LONG_MAX", "LONG_MIN", "MAX_CANON",
+  "MAX_INPUT", "MQ_OPEN_MAX", "MQ_PRIO_MAX", "NAME_MAX", "OPEN_MAX",
+  "PATH_MAX", "PIPE_BUF", "RTSIG_MAX", "PTHREAD_DESTRUCTOR_ITERATIONS",
+  "PTHREAD_KEYS_MAX", "PTHREAD_STACK_MIN", "PTHREAD_THREADS_MAX"
+};
+
+/* <locale.h>.  */
+static const char *const locale_syms[] =
+{
+  "LC_ALL", "LC_COLLATE", "LC_CTYPE", "LC_MONETARY", "LC_NUMERIC",
+  "LC_TIME", "NULL"
+};
+static const char *const locale_maybe[] =
+{
+  "LC_*", "localeconv", "setlocale"
+};
+
+/* <math.h>.  */
+static const char *const math_syms[] =
+{
+  "HUGE_VAL"
+};
+static const char *const math_maybe[] =
+{
+  "acos", "asin", "atan2", "atan", "ceil", "cos", "cosh", "exp",
+  "fabs", "floor", "fmod", "frexp", "ldexp", "log10", "log", "modf",
+  "pow", "sin", "sinh", "sqrt", "tan", "tanh",
+  "acosf", "asinf", "atan2f", "atanf", "ceilf", "cosf", "coshf", "expf",
+  "fabsf", "floorf", "fmodf", "frexpf", "ldexpf", "log10f", "logf", "modff",
+  "powf", "sinf", "sinhf", "sqrtf", "tanf", "tanhf",
+  "acosl", "asinl", "atan2l", "atanl", "ceill", "cosl", "coshl", "expl",
+  "fabsl", "floorl", "fmodl", "frexpl", "ldexpl", "log10l", "logl", "modfl",
+  "powl", "sinl", "sinhl", "sqrtl", "tanl", "tanhl"
+};
+
+/* <mqueue.h>.  */
+static const char *const mqueue_syms[] =
+{
+};
+static const char *const mqueue_maybe[] =
+{
+  "mq_close", "mq_getattr", "mq_notify", "mq_open", "mq_receive",
+  "mq_send", "mq_setattr", "mq_unlink"
+};
+
+/* <pthread.h>.  */
+static const char *const pthread_syms[] =
+{
+  "PTHREAD_CANCELED", "PTHREAD_CANCEL_ASYNCHRONOUS",
+  "PTHREAD_CANCEL_DEFERRED", "PTHREAD_CANCEL_DISABLE", "PTHREAD_CANCEL_ENABLE",
+  "PTHREAD_COND_INITIALIZER", "PTHREAD_CREATE_DETACHED",
+  "PTHREAD_CREATE_JOINABLE", "PTHREAD_EXPLICIT_SCHED",
+  "PTHREAD_INHERIT_SCHED", "PTHREAD_MUTEX_INITIALIZER",
+  "PTHREAD_ONCE_INIT", "PTHREAD_PRIO_INHERIT", "PTHREAD_PRIO_NONE",
+  "PTHREAD_PRIO_PROTECT", "PTHREAD_PROCESS_PRIVATE",
+  "PTHREAD_PROCESS_SHARED", "PTHREAD_SCOPE_PROCESS", "PTHREAD_SCOPE_SYSTEM",
+  /* These come from <sched.h>.  */
+  "SCHED_FIFO", "SCHED_OTHER", "SCHED_RR",
+  /* These come from <time.h>.  */
+  "CLK_TCK", "CLOCKS_PER_SEC", "CLOCK_REALTIME", "NULL", "TIMER_ABSTIME"
+};
+static const char *const pthread_maybe[] =
+{
+  "pthread_atfork", "pthread_attr_destroy", "pthread_attr_getdetachstate",
+  "pthread_attr_getinheritsched", "pthread_attr_getschedparam",
+  "pthread_attr_getschedpolicy", "pthread_attr_getscope",
+  "pthread_attr_getstackaddr", "pthread_attr_getstacksize",
+  "pthread_attr_init", "pthread_attr_setdetachstate",
+  "pthread_attr_setinheritsched", "pthread_attr_setschedparam",
+  "pthread_attr_setschedpolicy", "pthread_attr_setscope",
+  "pthread_attr_setstackaddr", "pthread_attr_setstacksize",
+  "pthread_cleanup_pop", "pthread_cleanup_push", "pthread_cond_broadcast",
+  "pthread_cond_destroy", "pthread_cond_init", "pthread_cond_signal",
+  "pthread_cond_timedwait", "pthread_cond_wait", "pthread_condattr_destroy",
+  "pthread_condattr_getpshared", "pthread_condattr_init",
+  "pthread_condattr_setpshared", "pthread_create", "pthread_detach",
+  "pthread_equal", "pthread_exit", "pthread_getspecific", "pthread_join",
+  "pthread_key_create", "pthread_key_destroy", "pthread_kill",
+  "pthread_mutex_destroy", "pthread_mutex_getprioceiling",
+  "pthread_mutex_init", "pthread_mutex_lock", "pthread_mutex_setprioceiling",
+  "pthread_mutex_trylock", "pthread_mutex_unlock", "pthread_mutexattr_destroy",
+  "pthread_mutexattr_getprioceiling", "pthread_mutexattr_getprotocol",
+  "pthread_mutexattr_getpshared", "pthread_mutexattr_init",
+  "pthread_mutexattr_setprioceiling", "pthread_mutexattr_setprotocol",
+  "pthread_mutexattr_setpshared", "pthread_once", "pthread_self",
+  "pthread_setcancelstate", "pthread_setcanceltype", "pthread_setspecific",
+  "pthread_sigmask", "pthread_testcancel"
+  /* These come from <sched.h>.  */
+  "sched_get_priority_max", "sched_get_priority_min",
+  "sched_get_rr_interval", "sched_getparam", "sched_getscheduler",
+  "sched_setparam", "sched_setscheduler", "sched_yield",
+  /* These come from <time.h>.  */
+  "asctime", "asctime_r", "clock", "clock_getres", "clock_gettime",
+  "clock_settime", "ctime", "ctime_r", "difftime", "gmtime", "gmtime_r",
+  "localtime", "localtime_r", "mktime", "nanosleep", "strftime", "time",
+  "timer_create", "timer_delete", "timer_getoverrun", "timer_gettime",
+  "timer_settime", "tzset"
+};
+
+/* <pwd.h>.  */
+static const char *const pwd_syms[] =
+{
+};
+static const char *const pwd_maybe[] =
+{
+  "getpwnam", "getpwnam_r", "getpwuid", "getpwuid_r"
+};
+
+/* <sched.h>.  */
+static const char *const sched_syms[] =
+{
+  "SCHED_FIFO", "SCHED_OTHER", "SCHED_RR",
+};
+static const char *const sched_maybe[] =
+{
+  "sched_get_priority_max", "sched_get_priority_min",
+  "sched_get_rr_interval", "sched_getparam", "sched_getscheduler",
+  "sched_setparam", "sched_setscheduler", "sched_yield",
+  /* These come from <time.h>.  */
+  "CLK_TCK", "CLOCKS_PER_SEC", "CLOCK_REALTIME", "NULL", "TIMER_ABSTIME"
+  "asctime", "asctime_r", "clock", "clock_getres", "clock_gettime",
+  "clock_settime", "ctime", "ctime_r", "difftime", "gmtime", "gmtime_r",
+  "localtime", "localtime_r", "mktime", "nanosleep", "strftime", "time",
+  "timer_create", "timer_delete", "timer_getoverrun", "timer_gettime",
+  "timer_settime", "tzset"
+};
+
+/* <semaphore.h>.  */
+static const char *const semaphore_syms[] =
+{
+};
+static const char *const semaphore_maybe[] =
+{
+  "sem_close", "sem_destroy", "sem_getvalue", "sem_init", "sem_open",
+  "sen_post", "sem_trywait", "sem_unlink", "sem_wait"
+};
+
+/* <setjmp.h>.  */
+static const char *const setjmp_syms[] =
+{
+};
+static const char *const setjmp_maybe[] =
+{
+  "longjmp", "setjmp", "siglongjmp", "sigsetjmp"
+};
+
+/* <signal.h>.  */
+static const char *const signal_syms[] =
+{
+  "SA_NOCLDSTOP", "SA_SIGINFO", "SIGABRT", "SIGALRM", "SIGBUS", "SIGCHLD",
+  "SIGCONT", "SIGEV_NONE", "SIGEV_SIGNAL", "SIGEV_THREAD",
+  "SIGFPE", "SIGHUP", "SIGILL", "SIGINT", "SIGKILL", "SIGPIPE", "SIGQUIT",
+  "SIGRTMAX", "SIGRTMIN", "SIGSEGV", "SIGSTOP", "SIGTERM", "SIGTSTP",
+  "SIGTTIN", "SIGTTOU", "SIGUSR1", "SIGUSR2", "SIG_BLOCK", "SIG_DFL",
+  "SIG_ERR", "SIG_IGN", "SIG_SETMASK", "SIG_UNBLOCK", "SI_ASYNCIO",
+  "SI_MESGQ", "SI_QUEUE", "SI_TIMER", "SI_USER"
+};
+static const char *const signal_maybe[] =
+{
+  "kill", "raise", "sigaction", "sigaddset", "sigdelset", "sigemptyset",
+  "sigfillset", "sigismember", "signal", "sigpending", "sigprocmask",
+  "sigqueue", "sigsuspend", "sigtimedwait", "sigwait", "sigwaitinfo"
+};
+
+/* <stdarg.h>.  */
+static const char *const stdarg_syms[] =
+{
+  "va_arg", "va_end", "va_start"
+};
+static const char *const stdarg_maybe[] =
+{
+  "va_list"
+};
+
+/* <stddef.h>.  */
+static const char *const stddef_syms[] =
+{
+  "NULL", "offsetof"
+};
+static const char *const stddef_maybe[] =
+{
+};
+
+/* <stdio.h>.  */
+static const char *const stdio_syms[] =
+{
+  "BUFSIZ", "EOF", "FILENAME_MAX", "FOPEN_MAX", "L_ctermid", "L_cuserid",
+  "L_tmpnam", "NULL", "SEEK_CUR", "SEEK_END", "SEEK_SET", "STREAM_MAX",
+  "TMP_MAX", "stderr", "stdin", "stdout", "_IOFBF", "_IOLBF", "_IONBF"
+};
+static const char *const stdio_maybe[] =
+{
+  "clearerr", "fclose", "fdopen", "feof", "ferror", "fflush", "fgetc",
+  "fgetpos", "fgets", "fileno", "flockfile", "fopen", "fprintf", "fputc",
+  "fputs", "fread", "freopen", "fscanf", "fseek", "fsetpos", "ftell",
+  "ftrylockfile", "funlockfile", "fwrite", "getc", "getchar",
+  "getchar_unlocked", "getc_unlocked", "gets", "perror", "printf", "putc",
+  "putchar", "putchar_unlocked", "putc_unlocked", "puts", "remove", "rename",
+  "rewind", "scanf", "setbuf", "setvbuf", "sprintf", "sscanf", "tmpfile",
+  "tmpnam", "ungetc", "vfprintf", "vprintf", "vsprintf"
+};
+
+/* <stdlib.h>.  */
+static const char *const stdlib_syms[] =
+{
+  "EXIT_FAILURE", "EXIT_SUCCESS", "MB_CUR_MAX", "NULL", "RAND_MAX"
+};
+static const char *const stdlib_maybe[] =
+{
+  "abort", "abs", "atexit", "atof", "atoi", "atol", "bsearch", "calloc",
+  "div", "exit", "free", "getenv", "labs", "ldiv", "malloc", "mblen",
+  "mbstowcs", "mbtowc", "qsort", "rand", "rand_r", "realloc", "srand",
+  "strtod", "strtol", "strtoul", "system", "wcstombs", "wctomb"
+};
+
+/* <string.h>.  */
+static const char *const string_syms[] =
+{
+  "NULL"
+};
+static const char *const string_maybe[] =
+{
+  "memchr", "memcmp", "memcpy", "memmove", "memset", "strcat", "strchr",
+  "strcmp", "strcoll", "strcpy", "strcspn", "strerror", "strlen",
+  "strncat", "strncmp", "strncpy", "strpbrk", "strrchr", "strspn",
+  "strstr", "strtok", "strtok_r", "strxfrm"
+};
+
+/* <sys/mman.h>.  */
+static const char *const mman_syms[] =
+{
+  "MAP_FAILED", "MAP_FIXED", "MAP_PRIVATE", "MAP_SHARED", "MCL_CURRENT",
+  "MCL_FUTURE", "MS_ASYNC", "MS_INVALIDATE", "MS_SYNC", "PROT_EXEC",
+  "PROT_NONE", "PROT_READ", "PROT_WRITE"
+};
+static const char *const mman_maybe[] =
+{
+  "mlock", "mlockall", "mmap", "mprotect", "msync", "munlock", "munlockall",
+  "munmap", "shm_open", "shm_unlock"
+};
+
+/* <sys/stat.h>.  */
+static const char *const stat_syms[] =
+{
+  "S_IRGRP", "S_IROTH", "S_IRUSR", "S_IRWXG", "S_IRWXO", "S_IRWXU",
+  "S_ISBLK", "S_ISCHR", "S_ISDIR", "S_ISFIFO", "S_ISGID", "S_ISREG",
+  "S_ISUID", "S_IWGRP", "S_IWOTH", "S_IWUSR", "S_IXGRP", "S_IXOTH",
+  "S_IXUSR", "S_TYPEISMQ", "S_TYPEISSEM", "S_TYPEISSHM"
+};
+static const char *const stat_maybe[] =
+{
+  "chmod", "fchmod", "fstat", "mkdir", "mkfifo", "stat", "umask"
+};
+
+/* <sys/times.h>.  */
+static const char *const times_syms[] =
+{
+};
+static const char *const times_maybe[] =
+{
+  "times"
+};
+
+/* <sys/types.h>.  */
+static const char *const types_syms[] =
+{
+};
+static const char *const types_maybe[] =
+{
+};
+
+/* <sys/utsname.h>.  */
+static const char *const utsname_syms[] =
+{
+};
+static const char *const utsname_maybe[] =
+{
+  "uname"
+};
+
+/* <sys/wait.h>.  */
+static const char *const wait_syms[] =
+{
+  "WEXITSTATUS", "WIFEXITED", "WIFSIGNALED", "WIFSTOPPED", "WNOHANG",
+  "WSTOPSIG", "WTERMSIG", "WUNTRACED"
+};
+static const char *const wait_maybe[] =
+{
+  "wait", "waitpid"
+};
+
+/* <termios.h>.  */
+static const char *const termios_syms[] =
+{
+  "B0", "B110", "B1200", "B134", "B150", "B1800", "B19200", "B200", "B2400",
+  "B300", "B38400", "B4800", "B50", "B600", "B75", "B9600", "BRKINT", "CLOCAL",
+  "CREAD", "CS5", "CS6", "CS7", "CS8", "CSIZE", "CSTOPN", "ECHO", "ECHOE",
+  "ECHOK", "ECHONL", "HUPCL", "ICANON", "ICRNL", "IEXTEN", "IGNBRK", "IGNCR",
+  "IGNPAR", "INCLR", "INPCK", "ISIG", "ISTRIP", "IXOFF", "IXON", "NCCS",
+  "NOFLSH", "OPOST", "PARENB", "PARMRK", "PARODD", "TCIFLUSH", "TCIOFF",
+  "TCIOFLUSH", "TCOFLUSH", "TCOOFF", "TCOON", "TCSADRAIN", "TCSAFLUSH",
+  "TCSANOW", "TOSTOP", "VEOF", "VEOL", "VERASE", "VINTR", "VKILL", "VMIN",
+  "VQUIT", "VSTART", "VSTOP", "VSUSP", "VTIME"
+};
+static const char *const termios_maybe[] =
+{
+  "cfgetispeed", "cfgetospeed", "cfsetispeed", "cfsetospeed", "tcdrain",
+  "tcflow", "tcflush", "tcgetattr", "tcsendbrk", "tcsetattr"
+};
+
+/* <time.h>.  */
+static const char *const time_syms[] =
+{
+  "CLK_TCK", "CLOCKS_PER_SEC", "CLOCK_REALTIME", "NULL", "TIMER_ABSTIME"
+};
+static const char *const time_maybe[] =
+{
+  "asctime", "asctime_r", "clock", "clock_getres", "clock_gettime",
+  "clock_settime", "ctime", "ctime_r", "difftime", "gmtime", "gmtime_r",
+  "localtime", "localtime_r", "mktime", "nanosleep", "strftime", "time",
+  "timer_create", "timer_delete", "timer_getoverrun", "timer_gettime",
+  "timer_settime", "tzset"
+};
+
+/* <unistd.h>.  */
+static const char *const unistd_syms[] =
+{
+  "F_OK", "NULL", "R_OK", "SEEK_CUR", "SEEK_END", "SEEK_SET", "STDERR_FILENO",
+  "STDIN_FILENO", "STDOUT_FILENO", "W_OK", "X_OK",
+  "_PC_ASYNC_IO", "_PC_CHOWN_RESTRICTED", "_PC_LINK_MAX", "_PC_MAX_CANON",
+  "_PC_MAX_INPUT", "_PC_NAME_MAX", "_PC_NO_TRUNC", "_PC_PATH_MAX",
+  "_PC_PIPE_BUF", "_PC_PRIO_IO", "_PC_SYNC_IO", "_PC_VDISABLE",
+  "_SC_AIO_LISTIO_MAX", "_SC_AIO_MAX", "_SC_AIO_PRIO_DELTA_MAX",
+  "_SC_ARG_MAX", "_SC_ASYNCHRONOUS_IO", "_SC_CHILD_MAX", "_SC_CLK_TCK",
+  "_SC_DELAYTIMER_MAX", "_SC_FSYNC", "_SC_GETGR_R_SIZE_MAX",
+  "_SC_GETPW_R_SIZE_MAX", "_SC_JOB_CONTROL", "_SC_LOGIN_NAME_MAX",
+  "_SC_MAPPED_FILES", "_SC_MEMLOCK", "_SC_MEMLOCK_RANGE",
+  "_SC_MEMORY_PROTECTION", "_SC_MESSAGE_PASSING", "_SC_MQ_OPEN_MAX",
+  "_SC_MQ_PRIO_MAX", "_SC_NGROUPS_MAX", "_SC_OPEN_MAX", "_SC_PAGESIZE",
+  "_SC_PRIORITIZED_IO", "_SC_PRIORITY_SCHEDULING", "_SC_REALTIME_SIGNALS",
+  "_SC_RTSIG_MAX", "_SC_SAVED_IDS", "_SC_SEMAPHORES", "_SC_SEM_NSEMS_MAX",
+  "_SC_SEM_VALUE_MAX", "_SC_SHARED_MEMORY_OBJECTS", "_SC_SIGQUEUE_MAX",
+  "_SC_STREAM_MAX", "_SC_SYNCHRONIZED_IO", "_SC_THREADS",
+  "_SC_THREAD_ATTR_STACKADDR", "_SC_THREAD_ATTR_STACKSIZE",
+  "_SC_THREAD_DESTRUCTOR_ITERATIONS", "_SC_THREAD_PRIO_INHERIT",
+  "_SC_THREAD_PRIORITY_SCHEDULING", "_SC_THREAD_PRIO_PROTECT",
+  "_SC_THREAD_PROCESS_SHARED", "_SC_THREAD_SAFE_FUNCTIONS",
+  "_SC_THREAD_STACK_MIN", "_SC_THREAD_THREADS_MAX", "_SC_TIMERS",
+  "_SC_TIMER_MAX", "_SC_TTY_NAME_MAX", "_SC_TZNAME_MAX", "_SC_VERSION"
+};
+static const char *const unistd_maybe[] =
+{
+  "_POSIX_ASYNCHRONOUS_IO", "_POSIX_ASYNC_IO", "_POSIX_CHOWN_RESTRICTED",
+  "_POSIX_FSYNC", "_POSIX_JOB_CONTROL", "_POSIX_MAPPED_FILES",
+  "_POSIX_MEMLOCK", "_POSIX_MEMLOCK_RANGE", "_MEMORY_PROTECTION",
+  "_POSIX_MESSAGE_PASSING", "_POSIX_NO_TRUNC", "_POSIX_PRIORITIZED_IO",
+  "_POSIX_PRIORITY_SCHEDULING", "_POSIX_PRIO_IO", "_POSIX_REATIME_SIGNALS",
+  "_POSIX_SAVED_IDS", "_POSIX_SEMAPHORES", "_POSIX_SHARED_MEMORY_OBJECTS",
+  "_POSIX_SYNCHRONIZED_IO", "_POSIX_SYNC_IO", "_POSIX_THREADS",
+  "_POSIX_THREAD_ATTR_STACKADDR", "_POSIX_THREAD_ATTR_STACKSIZE",
+  "_POSIX_THREAD_PRIO_INHERIT", "_POSIX_THREAD_PRIO_PROTECT",
+  "_POSIX_THREAD_PROCESS_SHARED", "_POSIX_THREAD_SAFE_FUNCTIONS",
+  "_POSIX_THREAD_PRIORITY_SCHEDULING", "_POSIX_TIMERS",
+  "_POSIX_VDISABLE", "_POSIX_VERSION",
+  "_exit", "access", "alarm", "chdir", "chown", "close", "ctermid", "cuserid",
+  "dup2", "dup", "execl", "execle", "execlp", "execv", "execve", "execvp",
+  "fdatasync", "fork", "fpathconf", "fsync", "ftruncate", "getcwd", "getegid",
+  "geteuid", "getgid", "getgroups", "getlogin", "getlogin_r", "getpgrp",
+  "getpid", "getppid", "getuid", "isatty", "link", "lseek", "pathconf",
+  "pause", "pipe", "read", "rmdir", "setgid", "setgpid", "setsid", "setuid",
+  "sleep", "sleep", "sysconf", "tcgetpgrp", "tcsetpgrp", "ttyname",
+  "ttyname_r", "unlink", "write"
+};
+
+/* <utime.h>.  */
+static const char *const utime_syms[] =
+{
+};
+static const char *const utime_maybe[] =
+{
+  "utime"
+};
+
+
+static struct header
+{
+  const char *name;
+  const char *const *syms;
+  size_t nsyms;
+  const char *const *maybe;
+  size_t nmaybe;
+  const char *subset;
+} headers[] =
+{
+#define H(n) \
+  { #n ".h", n##_syms, sizeof (n##_syms) / sizeof (n##_syms[0]), \
+    n##_maybe, sizeof (n##_maybe) / sizeof (n##_maybe[0]), NULL }
+#define Hc(n, s) \
+  { #n ".h", n##_syms, sizeof (n##_syms) / sizeof (n##_syms[0]), \
+    n##_maybe, sizeof (n##_maybe) / sizeof (n##_maybe[0]), s }
+#define Hs(n) \
+  { "sys/" #n ".h", n##_syms, sizeof (n##_syms) / sizeof (n##_syms[0]), \
+    n##_maybe, sizeof (n##_maybe) / sizeof (n##_maybe[0]), NULL }
+  H(aio),
+  H(assert),
+  H(ctype),
+  H(dirent),
+  H(errno),
+  H(fcntl),
+  H(float),
+  H(grp),
+  H(limits),
+  H(locale),
+  H(math),
+  Hc(mqueue, "_POSIX_MESSAGE_PASSING"),
+  H(pthread),
+  H(pwd),
+  H(sched),
+  H(semaphore),
+  H(setjmp),
+  H(signal),
+  H(stdarg),
+  H(stddef),
+  H(stdio),
+  H(stdlib),
+  H(string),
+  Hs(mman),
+  Hs(stat),
+  Hs(times),
+  Hs(types),
+  Hs(utsname),
+  Hs(wait),
+  H(termios),
+  H(time),
+  H(unistd),
+  H(utime)
+};
+
+#define NUMBER_OF_HEADERS              (sizeof headers / sizeof *headers)
+
+
+/* Format string to build command to invoke compiler.  */
+static const char fmt[] = "\
+echo \"#include <%s>\" |\
+%s -E -dM -D_POSIX_SOURCE %s \
+-isystem `%s --print-prog-name=include` - > %s";
+
+static const char testfmt[] = "\
+echo \"#include <unistd.h>\n#if !defined %s || %s == -1\n#error not defined\n#endif\n\" |\
+%s -E -dM -D_POSIX_SOURCE %s \
+-isystem `%s --print-prog-name=include` - 2> /dev/null > %s";
+
+
+/* The compiler we use (given on the command line).  */
+const char *CC;
+/* The -I parameters for CC to find all headers.  */
+const char *INC;
+
+static char *xstrndup (const char *, size_t);
+static const char **get_null_defines (void);
+static int check_header (const struct header *, const char **);
+static int xsystem (const char *);
+
+int
+main (int argc, char *argv[])
+{
+  int h;
+  int result = 0;
+  const char **ignore_list;
+
+  CC = argc > 1 ? argv[1] : "gcc";
+  INC = argc > 2 ? argv[2] : "";
+
+  if (system (NULL) == 0)
+    {
+      puts ("Sorry, no command processor.");
+      return EXIT_FAILURE;
+    }
+
+  /* First get list of symbols which are defined by the compiler.  */
+  ignore_list = get_null_defines ();
+
+  fputs ("Tested files:\n", stdout);
+
+  for (h = 0; h < NUMBER_OF_HEADERS; ++h)
+    result |= check_header (&headers[h], ignore_list);
+
+  /* The test suite should return errors but for now this is not
+     practical.  Give a warning and ask the user to correct the bugs.  */
+  return result;
+}
+
+
+static char *
+xstrndup (const char *s, size_t n)
+{
+  size_t len = n;
+  char *new = malloc (len + 1);
+
+  if (new == NULL)
+    return NULL;
+
+  new[len] = '\0';
+  return memcpy (new, s, len);
+}
+
+
+/* Like system but propagate interrupt and quit signals.  */
+int
+xsystem (const char *cmd)
+{
+  int status;
+
+  status = system (cmd);
+  if (status != -1)
+    {
+      if (WIFSIGNALED (status))
+	{
+	  if (WTERMSIG (status) == SIGINT || WTERMSIG (status) == SIGQUIT)
+	    raise (WTERMSIG (status));
+	}
+      else if (WIFEXITED (status))
+	{
+	  if (WEXITSTATUS (status) == SIGINT + 128
+	      || WEXITSTATUS (status) == SIGQUIT + 128)
+	    raise (WEXITSTATUS (status) - 128);
+	}
+    }
+  return status;
+}
+
+
+static const char **
+get_null_defines (void)
+{
+  char line[BUFSIZ], *command;
+  char **result = NULL;
+  size_t result_len = 0;
+  size_t result_max = 0;
+  FILE *input;
+  int first = 1;
+
+  macrofile = tmpnam (NULL);
+
+  command = malloc (sizeof fmt + sizeof "/dev/null" + 2 * strlen (CC)
+		    + strlen (INC) + strlen (macrofile));
+
+  if (command == NULL)
+    {
+      puts ("No more memory.");
+      exit (1);
+    }
+
+  sprintf (command, fmt, "/dev/null", CC, INC, CC, macrofile);
+
+  if (xsystem (command))
+    {
+      puts ("system() returned nonzero");
+      return NULL;
+    }
+  free (command);
+  input = fopen (macrofile, "r");
+
+  if (input == NULL)
+    {
+      printf ("Could not read %s: ", macrofile);
+      perror (NULL);
+      return NULL;
+    }
+
+  while (fgets (line, sizeof line, input) != NULL)
+    {
+      char *start;
+      if (strlen (line) < 9 || line[7] != ' ')
+	{ /* "#define A" */
+	  printf ("Malformed input, expected '#define MACRO'\ngot '%s'\n",
+		  line);
+	  continue;
+	}
+      if (line[8] == '_')
+	/* It's a safe identifier.  */
+	continue;
+      if (result_len == result_max)
+	{
+	  result_max += 10;
+	  result = realloc (result, result_max * sizeof (char **));
+	  if (result == NULL)
+	    {
+	      puts ("No more memory.");
+	      exit (1);
+	    }
+	}
+      start = &line[8];
+      result[result_len++] = xstrndup (start, strcspn (start, " ("));
+
+      if (first)
+	{
+	  fputs ("The following identifiers will be ignored since the compiler defines them\nby default:\n", stdout);
+	  first = 0;
+	}
+      puts (result[result_len - 1]);
+    }
+  if (result_len == result_max)
+    {
+      result_max += 1;
+      result = realloc (result, result_max * sizeof (char **));
+      if (result == NULL)
+	{
+	  puts ("No more memory.");
+	  exit (1);
+	}
+    }
+  result[result_len] = NULL;
+  fclose (input);
+  remove (macrofile);
+
+  return (const char **) result;
+}
+
+
+static int
+check_header (const struct header *header, const char **except)
+{
+  char line[BUFSIZ], command[sizeof fmt + strlen (header->name)
+			     + 2 * strlen (CC)
+			     + strlen (INC) + strlen (macrofile)];
+  FILE *input;
+  int result = 0;
+  int found[header->nsyms];
+  int i;
+
+  memset (found, '\0', header->nsyms * sizeof (int));
+
+  printf ("=== %s ===\n", header->name);
+  sprintf (command, fmt, header->name, CC, INC, CC, macrofile);
+
+  /* First see whether this subset is supported at all.  */
+  if (header->subset != NULL)
+    {
+      sprintf (line, testfmt, header->subset, header->subset, CC, INC, CC,
+	       macrofile);
+      if (xsystem (line))
+	{
+	  printf ("!! not available\n");
+	  return 0;
+	}
+    }
+
+  if (xsystem (command))
+    {
+      puts ("system() returned nonzero");
+      result = 1;
+    }
+  input = fopen (macrofile, "r");
+
+  if (input == NULL)
+    {
+      printf ("Could not read %s: ", macrofile);
+      perror (NULL);
+      return 1;
+    }
+
+  while (fgets (line, sizeof line, input) != NULL)
+    {
+      const char **ignore;
+      if (strlen (line) < 9 || line[7] != ' ')
+	{ /* "#define A" */
+	  printf ("Malformed input, expected '#define MACRO'\ngot '%s'\n",
+		  line);
+	  result = 1;
+	  continue;
+	}
+
+      /* Find next char after the macro identifier; this can be either
+	 a space or an open parenthesis.  */
+      line[8 + strcspn (&line[8], " (")] = '\0';
+
+      /* Now check whether it's one of the required macros.  */
+      for (i = 0; i < header->nsyms; ++i)
+	if (!strcmp (&line[8], header->syms[i]))
+	  break;
+      if (i < header->nsyms)
+	{
+	  found[i] = 1;
+	  continue;
+	}
+
+      /* Symbols starting with "_" are ok.  */
+      if (line[8] == '_')
+	continue;
+
+      /* Maybe one of the symbols which are always defined.  */
+      for (ignore = except; *ignore != NULL; ++ignore)
+	if (! strcmp (&line[8], *ignore))
+	  break;
+      if (*ignore != NULL)
+	continue;
+
+      /* Otherwise the symbol better should match one of the following.  */
+      for (i = 0; i < header->nmaybe; ++i)
+	if (fnmatch (header->maybe[i], &line[8], 0) == 0)
+	  break;
+      if (i < header->nmaybe)
+	continue;
+
+      printf ("*  invalid macro `%s'\n", &line[8]);
+      result |= 1;
+    }
+  fclose (input);
+  remove (macrofile);
+
+  for (i = 0; i < header->nsyms; ++i)
+    if (found[i] == 0)
+      printf ("** macro `%s' not defined\n", header->syms[i]);
+
+  return result;
+}