kc3-lang/gnulib/m4/readlinkat.m4

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• Hash : ea81f2b6
  Author :
  Date : 2024-04-04T11:56:10
  

  Make the file header of *.m4 files consistent:
  
  1. The file name.
  2. The serial number.
  3. The copyright and license header.
  
  * m4/*.m4: Adjust file headers.
  

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• m4/readlinkat.m4

• # readlinkat.m4
  # serial 8
  dnl Copyright (C) 2009-2024 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.
  
  # See if we need to provide readlinkat replacement.
  
  # Written by Eric Blake.
  
  AC_DEFUN([gl_FUNC_READLINKAT],
  [
    AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
    AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
    gl_CHECK_FUNCS_ANDROID([readlinkat], [[#include <unistd.h>]])
    AC_REQUIRE([gl_FUNC_READLINK])
    if test $ac_cv_func_readlinkat = no; then
      HAVE_READLINKAT=0
      case "$gl_cv_onwards_func_readlinkat" in
        future*) REPLACE_READLINKAT=1 ;;
      esac
    else
      AC_CACHE_CHECK([whether readlinkat signature is correct],
        [gl_cv_decl_readlinkat_works],
        [AC_COMPILE_IFELSE(
           [AC_LANG_PROGRAM(
             [[#include <unistd.h>
               /* Check whether original declaration has correct type.  */
               ssize_t readlinkat (int, char const *, char *, size_t);]])],
           [gl_cv_decl_readlinkat_works=yes],
           [gl_cv_decl_readlinkat_works=no])])
      # Assume readlinkat has the same bugs as readlink,
      # as is the case on OS X 10.10 with trailing slashes.
      case $gl_cv_decl_readlinkat_works,$gl_cv_func_readlink_trailing_slash,$gl_cv_func_readlink_truncate in
        *yes,*yes,*yes)
          ;;
        *)
          REPLACE_READLINKAT=1
          ;;
      esac
    fi
  ])
  

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