kc3-lang/gnulib/m4/passfd.m4

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• Hash : 3498a703
  Author :
  Date : 2024-07-31T17:10:56
  

  errno: make EEXIST != ENOTEMPTY on AIX
  
  Also, improve errno tests.
  * m4/calloc.m4 (gl_FUNC_CALLOC_GNU):
  * m4/malloc.m4 (gl_FUNC_MALLOC_GNU):
  * m4/realloc.m4 (gl_FUNC_REALLOC_GNU):
  * m4/scandir.m4 (gl_FUNC_SCANDIR):
  Define _LINUX_SOURCE_COMPAT, as this can sometimes help on AIX.
  * m4/errno_h.m4 (gl_HEADER_ERRNO_H):
  Define _LINUX_SOURCE_COMPAT, to make EEXIST != ENOTEMPTY.
  * m4/strerror_r.m4 (gl_FUNC_STRERROR_R):
  Define _LINUX_SOURCE_COMPAT, in case someone else does.
  * modules/errno-tests (Depends-on): Add assert-h, c99.
  * tests/test-errno.c (e1, ..., e131): Remove, replacing with ...
  (CHECK_POSIX_ERRNOS, POSITIVE_INTEGER_CONSTANT_EXPRESSION)
  (INDEXED_BY_ERRNO, ERRNO_COUNT): These new macros.
  Check that all errno values are positive integer constant expressions.
  Check that they are all distinct, except perhaps for
  EWOULDBLOCK == EAGAIN and ENOTSUP == EOPNOTSUPP.
  Also check ESOCKTNOSUPPORT, added in POSIX.1-2024.
  Also, check that errno values are distinct except when POSIX says
  they needn’t be distinct, since POSIX.1-2024 gives license to
  GNU/Linux’s non-distinct values.
  

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• m4/passfd.m4

• # passfd.m4
  # serial 10
  dnl Copyright (C) 2011-2024 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_PASSFD],
  [
    AC_REQUIRE([gl_SYS_SOCKET_H])
    AC_CHECK_FUNCS_ONCE([recvmsg sendmsg])
  
    dnl Persuade AIX 5.2 <sys/socket.h> to declare CMSG_SPACE, CMSG_LEN.
    dnl CMSG_FIRSTHDR is POSIX 2008, but CMSG_SPACE is only in RFC 3542.
    AC_DEFINE([_LINUX_SOURCE_COMPAT], [1],
      [Define so that AIX headers are more compatible with GNU/Linux.])
  
    dnl Passfd prefers the POSIX use of msg.msg_control if the CMSG_* macros
    dnl are present, but can fall back to BSD 4.3 style of msg.msg_accrights.
    AC_CHECK_MEMBERS([struct msghdr.msg_accrights], [], [], [[
      #include <sys/types.h>
      #include <sys/socket.h>
    ]])
  ])
  

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