kc3-lang/gnulib/m4/write.m4

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• Hash : 836e0457
  Author :
  Date : 2011-04-13T12:15:43
  

  Support non-blocking pipe I/O in write() on native Windows.
  
  * lib/unistd.in.h (write): Enable replacement also if
  GNULIB_UNISTD_H_NONBLOCKING is 1.
  * lib/write.c: Enable replacement also if GNULIB_NONBLOCKING.
  (rpl_write): When failing to write on a non-blocking pipe, change
  errno from ENOSPC to EAGAIN.
  * lib/stdio.in.h (fprintf, fputc, fputs, fwrite, printf, putc,
  putchar, puts, vfprintf, vprintf): Enable replacement also if
  GNULIB_STDIO_H_NONBLOCKING is 1.
  * lib/stdio-write.c: Enable replacements also if GNULIB_NONBLOCKING.
  (CLEAR_ERRNO, HANDLE_ENOSPC): New macros.
  (CLEAR_LastError, HANDLE_ERROR_NO_DATA): New macros, extracted from
  CALL_WITH_SIGPIPE_EMULATION.
  (CALL_WITH_SIGPIPE_EMULATION): Use them.
  * m4/nonblocking.m4: New file.
  * m4/write.m4 (gl_FUNC_WRITE): Enable REPLACE_WRITE also if required
  for non-blocking I/O support.
  * m4/unistd_h.m4 (gl_UNISTD_H_DEFAULTS): Initialize
  GNULIB_UNISTD_H_NONBLOCKING.
  * m4/stdio_h.m4 (gl_STDIO_H): Enable REPLACE_STDIO_WRITE_FUNCS also if
  required for non-blocking I/O support.
  (gl_STDIO_H_DEFAULTS): Initialize GNULIB_STDIO_H_NONBLOCKING.
  * modules/nonblocking (Files): Add m4/nonblocking.m4,
  lib/stdio-write.c, m4/asm-underscore.m4.
  (Depends-on): Add stdio, unistd.
  (configure.ac): Invoke gl_NONBLOCKING_IO. Define GNULIB_NONBLOCKING.
  Set GNULIB_STDIO_H_NONBLOCKING, GNULIB_UNISTD_H_NONBLOCKING.
  * modules/unistd (Makefile.am): Substitute GNULIB_UNISTD_H_NONBLOCKING.
  * modules/stdio (Makefile.am): Substitute GNULIB_STDIO_H_NONBLOCKING.
  * doc/posix-functions/fprintf.texi: Mention 'nonblocking' module and
  problem with non-blocking pipes.
  * doc/posix-functions/fputc.texi: Likewise.
  * doc/posix-functions/fputs.texi: Likewise.
  * doc/posix-functions/fwrite.texi: Likewise.
  * doc/posix-functions/printf.texi: Likewise.
  * doc/posix-functions/putc.texi: Likewise.
  * doc/posix-functions/putchar.texi: Likewise.
  * doc/posix-functions/puts.texi: Likewise.
  * doc/posix-functions/vfprintf.texi: Likewise.
  * doc/posix-functions/vprintf.texi: Likewise.
  * doc/posix-functions/write.texi: Likewise.
  

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• m4/write.m4

• # write.m4 serial 2
  dnl Copyright (C) 2008-2011 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_WRITE],
  [
    AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
    dnl This ifdef is just an optimization, to avoid performing a configure
    dnl check whose result is not used. It does not make the test of
    dnl GNULIB_UNISTD_H_SIGPIPE or GNULIB_SIGPIPE redundant.
    m4_ifdef([gl_SIGNAL_SIGPIPE], [
      gl_SIGNAL_SIGPIPE
      if test $gl_cv_header_signal_h_SIGPIPE != yes; then
        REPLACE_WRITE=1
      fi
    ])
    m4_ifdef([gl_NONBLOCKING_IO], [
      gl_NONBLOCKING_IO
      if test $gl_cv_have_nonblocking != yes; then
        REPLACE_WRITE=1
      fi
    ])
    if test $REPLACE_WRITE = 1; then
      AC_LIBOBJ([write])
    fi
  ])
  

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