kc3-lang/gnulib/m4/dup3.m4

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• Hash : 0244a842
  Author :
  Date : 2023-01-22T11:55:01
  

  Resolve conflicts for functions introduced in Android API level 21.
  
  * lib/unistd.in.h (dup3): Consider REPLACE_DUP3. Disable
  _GL_CXXALIASWARN invocation on non-glibc systems.
  * m4/unistd_h.m4 (gl_UNISTD_H_DEFAULTS): Initialize REPLACE_DUP3.
  * modules/unistd (Makefile.am): Substitute REPLACE_DUP3.
  * m4/dup3.m4 (gl_FUNC_DUP3): Conditionally set REPLACE_DUP3.
  

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• m4/dup3.m4

• # dup3.m4 serial 7
  dnl Copyright (C) 2009-2023 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_DUP3],
  [
    AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
  
    dnl Persuade glibc <unistd.h> to declare dup3().
    AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
  
    AC_CHECK_FUNCS_ONCE([setdtablesize])
    gl_CHECK_FUNCS_ANDROID([dup3], [[#include <unistd.h>]])
    if test $ac_cv_func_dup3 != yes; then
      HAVE_DUP3=0
      case "$gl_cv_onwards_func_dup3" in
        future*) REPLACE_DUP3=1 ;;
      esac
    else
      REPLACE_DUP3=1
    fi
  
  dnl Not needed yet, because dup3 is unconditionally replaced.
  dnl  dnl Replace dup3() for supporting the gnulib-defined fchdir() function,
  dnl  dnl to keep fchdir's bookkeeping up-to-date.
  dnl  m4_ifdef([gl_FUNC_FCHDIR], [
  dnl    gl_TEST_FCHDIR
  dnl    if test $HAVE_FCHDIR = 0; then
  dnl      if test $HAVE_DUP3 = 1; then
  dnl        REPLACE_DUP3=1
  dnl      fi
  dnl    fi
  dnl  ])
  ])
  

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