select.m4

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Hash : d4c637e5
Author :
Date : 2020-08-15T16:54:17

Support compiling without -loldnames on native Windows.

* m4/gnulib-common.m4 (GL_MDA_DEFINES, _GL_MDA_DEFINES): New macros.
* m4/chown.m4 (AC_FUNC_CHOWN): In the test programs, use GL_MDA_DEFINES.
(gl_FUNC_CHOWN, gl_FUNC_CHOWN_FOLLOWS_SYMLINK): Likewise.
* m4/dup.m4 (gl_FUNC_DUP): Likewise.
* m4/dup2.m4 (gl_FUNC_DUP2): Likewise.
* m4/fchdir.m4 (gl_FUNC_FCHDIR): Likewise.
* m4/fchmodat.m4 (gl_FUNC_FCHMODAT): Likewise.
* m4/fchownat.m4 (gl_FUNC_FCHOWNAT_EMPTY_FILENAME_BUG): Likewise.
* m4/fcntl-o.m4 (gl_FCNTL_O_FLAGS): Likewise.
* m4/fcntl.m4 (gl_FUNC_FCNTL): Likewise.
* m4/fdopen.m4 (gl_FUNC_FDOPEN): Likewise.
* m4/fdopendir.m4 (gl_FUNC_FDOPENDIR): Likewise.
* m4/fflush.m4 (gl_FUNC_FFLUSH_STDIN): Likewise.
* m4/fopen.m4 (gl_FUNC_FOPEN_GNU): Likewise.
* m4/freopen.m4 (gl_FUNC_FREOPEN): Likewise.
* m4/futimens.m4 (gl_FUNC_FUTIMENS): Likewise.
* m4/getcwd-abort-bug.m4 (gl_FUNC_GETCWD_ABORT_BUG): Likewise.
* m4/getcwd-path-max.m4 (gl_FUNC_GETCWD_PATH_MAX): Likewise.
* m4/getcwd.m4 (gl_FUNC_GETCWD_NULL, gl_FUNC_GETCWD_SIGNATURE):
Likewise.
* m4/getdtablesize.m4 (gl_FUNC_GETDTABLESIZE): Likewise.
* m4/linkat.m4 (gl_FUNC_LINKAT): Likewise.
* m4/lseek.m4 (gl_FUNC_LSEEK): Likewise.
* m4/mkdir.m4 (gl_FUNC_MKDIR): Likewise.
* m4/mkstemp.m4 (gl_FUNC_MKSTEMP): Likewise.
* m4/mktime.m4 (gl_FUNC_MKTIME_WORKS): Likewise.
* m4/open-slash.m4 (gl_OPEN_TRAILING_SLASH_BUG): Likewise.
* m4/poll.m4 (gl_FUNC_POLL): Likewise.
* m4/posix_spawn.m4 (gl_POSIX_SPAWN_WORKS): Likewise.
* m4/pread.m4 (gl_FUNC_PREAD): Likewise.
* m4/pselect.m4 (gl_FUNC_PSELECT): Likewise.
* m4/pthread_sigmask.m4 (gl_FUNC_PTHREAD_SIGMASK): Likewise.
* m4/ptsname_r.m4 (gl_PREREQ_PTSNAME_R): Likewise.
* m4/putenv.m4 (gl_FUNC_PUTENV): Likewise.
* m4/pwrite.m4 (gl_FUNC_PWRITE): Likewise.
* m4/rename.m4 (gl_FUNC_RENAME): Likewise.
* m4/rmdir-errno.m4 (gl_FUNC_RMDIR_NOTEMPTY): Likewise.
* m4/rmdir.m4 (gl_FUNC_RMDIR): Likewise.
* m4/select.m4 (gl_FUNC_SELECT): Likewise.
* m4/setenv.m4 (gl_FUNC_UNSETENV): Likewise.
* m4/strncat.m4 (gl_FUNC_STRNCAT): Likewise.
* m4/ttyname_r.m4 (gl_FUNC_TTYNAME_R): Likewise.
* m4/unlink-busy.m4 (gl_FUNC_UNLINK_BUSY_TEXT): Likewise.
* m4/unlink.m4 (gl_FUNC_UNLINK): Likewise.
* m4/utimens.m4 (gl_UTIMENS): Likewise.
* m4/utimensat.m4 (gl_FUNC_UTIMENSAT): Likewise.
* m4/utimes.m4 (gl_FUNC_UTIMES): Likewise.
* m4/canonicalize.m4 (gl_CANONICALIZE_LGPL): On native Windows, don't
test for getcwd.
* m4/utime.m4 (gl_FUNC_UTIME): On native Windows, don't test for utime.
* m4/wcsdup.m4 (gl_FUNC_WCSDUP): To test for wcsdup, use a test program
with GL_MDA_DEFINES.
* lib/c++defs.h (_GL_CXXALIAS_MDA): New macro.
* lib/fcntl.in.h (creat, open):  On native Windows, use the underscore-
prefixed symbol.
* lib/search.in.h (lfind, lsearch): Likewise.
* lib/stdio.in.h (fcloseall, fdopen, fileno, getw, putw, tempnam):
Likewise.
* lib/stdlib.in.h (ecvt, fcvt, gcvt, mktemp, putenv): Likewise.
* lib/string.in.h (memccpy, strdup): Likewise.
* lib/sys_stat.in.h (chmod, umask): Likewise.
* lib/time.in.h (tzset): Likewise.
* lib/unistd.in.h (access, chdir, close, dup, dup2, execl, execle,
execlp, execv, execve, execvp, execvpe, getcwd, getpid, isatty, lseek,
read, rmdir, swab, unlink, write): Likewise.
* lib/utime.in.h (utime): Likewise.
* lib/wchar.in.h (wcsdup): Likewise.
* lib/math.in.h (j0, j1, jn, y0, y1, yn):  Likewise.
(isfinite, isinf, isnan, signbit): On native Windows, don't define as an
rpl_-prefixed macro.
* lib/canonicalize-lgpl.c (__getcwd): On native Windows, use _getcwd.
* lib/close.c (close_nothrow): On native Windows, use _close.
* lib/creat.c (orig_creat): On native Windows, use _creat.
* lib/dup.c (dup_nothrow): On native Windows, use _dup.
* lib/dup2.c (dup2_nothrow): Use _dup2.
* lib/fdopen.c (fdopen_nothrow): On native Windows, use _fdopen.
* lib/getcwd-lgpl.c: On native Windows, use _getcwd.
* lib/getcwd.c (getcwd_nothrow): Use _getcwd also on mingw.
* lib/open.c (orig_open): On native Windows, use _open.
* lib/read.c (read_nothrow): Use _read.
* lib/rmdir.c: On native Windows, use _rmdir.
* lib/unlink.c: On native Windows, use _unlink.
* lib/write.c (write_nothrow): Use _write.
* lib/sys_select.in.h (close): With clang, don't attach a warning on an
undefined symbol.
* lib/sys_socket.in.h (close): Likewise.
* lib/sys_time.in.h (close): Likewise.
* tests/test-spawn-pipe-child.c: On native Windows, use _fdopen.

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m4/select.m4

# select.m4 serial 12
dnl Copyright (C) 2009-2020 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.

AC_DEFUN([gl_FUNC_SELECT],
[
  AC_REQUIRE([gl_HEADER_SYS_SELECT])
  AC_REQUIRE([AC_C_RESTRICT])
  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
  AC_REQUIRE([gl_SOCKETS])
  if test "$ac_cv_header_winsock2_h" = yes; then
    REPLACE_SELECT=1
  else
    dnl On Interix 3.5, select(0, NULL, NULL, NULL, timeout) fails with error
    dnl EFAULT.
    AC_CHECK_HEADERS_ONCE([sys/select.h])
    AC_CACHE_CHECK([whether select supports a 0 argument],
      [gl_cv_func_select_supports0],
      [
        AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <sys/types.h>
#include <sys/time.h>
#if HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
int main ()
{
  struct timeval timeout;
  timeout.tv_sec = 0;
  timeout.tv_usec = 5;
  return select (0, (fd_set *)0, (fd_set *)0, (fd_set *)0, &timeout) < 0;
}]])], [gl_cv_func_select_supports0=yes], [gl_cv_func_select_supports0=no],
          [
changequote(,)dnl
           case "$host_os" in
                       # Guess no on Interix.
             interix*) gl_cv_func_select_supports0="guessing no";;
                       # Guess yes otherwise.
             *)        gl_cv_func_select_supports0="guessing yes";;
           esac
changequote([,])dnl
          ])
      ])
    case "$gl_cv_func_select_supports0" in
      *yes) ;;
      *) REPLACE_SELECT=1 ;;
    esac

    dnl On FreeBSD 8.2, select() doesn't always reject bad fds.
    AC_CACHE_CHECK([whether select detects invalid fds],
      [gl_cv_func_select_detects_ebadf],
      [
        AC_RUN_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <sys/time.h>
#if HAVE_SYS_SELECT_H
# include <sys/select.h>
#endif
#include <unistd.h>
#include <errno.h>
]GL_MDA_DEFINES],
[[
  fd_set set;
  dup2(0, 16);
  FD_ZERO(&set);
  FD_SET(16, &set);
  close(16);
  struct timeval timeout;
  timeout.tv_sec = 0;
  timeout.tv_usec = 5;
  return select (17, &set, NULL, NULL, &timeout) != -1 || errno != EBADF;
]])], [gl_cv_func_select_detects_ebadf=yes],
      [gl_cv_func_select_detects_ebadf=no],
          [
           case "$host_os" in
                             # Guess yes on Linux systems.
            linux-* | linux) gl_cv_func_select_detects_ebadf="guessing yes" ;;
                             # Guess yes on glibc systems.
            *-gnu* | gnu*)   gl_cv_func_select_detects_ebadf="guessing yes" ;;
                             # If we don't know, obey --enable-cross-guesses.
            *)               gl_cv_func_select_detects_ebadf="$gl_cross_guess_normal" ;;
           esac
          ])
      ])
    case $gl_cv_func_select_detects_ebadf in
      *yes) ;;
      *) REPLACE_SELECT=1 ;;
    esac
  fi

  dnl Determine the needed libraries.
  LIB_SELECT="$LIBSOCKET"
  if test $REPLACE_SELECT = 1; then
    case "$host_os" in
      mingw*)
        dnl On the MSVC platform, the function MsgWaitForMultipleObjects
        dnl (used in lib/select.c) requires linking with -luser32. On mingw,
        dnl it is implicit.
        AC_LINK_IFELSE(
          [AC_LANG_SOURCE([[
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
int
main ()
{
  MsgWaitForMultipleObjects (0, NULL, 0, 0, 0);
  return 0;
}]])],
          [],
          [LIB_SELECT="$LIB_SELECT -luser32"])
        ;;
    esac
  fi
  AC_SUBST([LIB_SELECT])
])

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kc3-lang/gnulib/m4/select.m4

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m4/select.m4