File: dup.m4

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# dup.m4 serial 3
dnl Copyright (C) 2011-2015 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_DUP],
[
  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
  AC_REQUIRE([gl_MSVC_INVAL])
  if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
    REPLACE_DUP=1
  fi
  dnl Replace dup() for supporting the gnulib-defined fchdir() function,
  dnl to keep fchdir's bookkeeping up-to-date.
  m4_ifdef([gl_FUNC_FCHDIR], [
    gl_TEST_FCHDIR
    if test $HAVE_FCHDIR = 0; then
      REPLACE_DUP=1
    fi
  ])
])

# Prerequisites of lib/dup.c.
AC_DEFUN([gl_PREREQ_DUP], [:])