kc3-lang/gnulib/m4/getlogin_r.m4

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• Hash : 3056396b
  Author :
  Date : 2023-01-22T14:43:32
  

  Resolve conflicts for functions introduced in Android API level 28.
  
  * m4/getlogin_r.m4 (gl_FUNC_GETLOGIN_R): Conditionally set
  REPLACE_GETLOGIN_R.
  * lib/unistd.in.h (getlogin_r): Disable _GL_CXXALIASWARN invocation on
  non-glibc systems.
  

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• m4/getlogin_r.m4

• #serial 15
  
  # Copyright (C) 2005-2007, 2009-2023 Free Software Foundation, Inc.
  #
  # This file is free software; the Free Software Foundation
  # gives unlimited permission to copy and/or distribute it,
  # with or without modifications, as long as this notice is preserved.
  
  dnl From Derek Price
  dnl
  dnl Provide getlogin_r when the system lacks it.
  dnl
  
  AC_DEFUN([gl_FUNC_GETLOGIN_R],
  [
    AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
  
    dnl Persuade glibc <unistd.h> to declare getlogin_r().
    dnl Persuade Solaris <unistd.h> to provide the POSIX compliant declaration of
    dnl getlogin_r().
    AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
  
    AC_CHECK_DECLS_ONCE([getlogin_r])
    if test $ac_cv_have_decl_getlogin_r = no; then
      HAVE_DECL_GETLOGIN_R=0
    fi
  
    gl_CHECK_FUNCS_ANDROID([getlogin_r], [[#include <unistd.h>]])
    if test $ac_cv_func_getlogin_r = no; then
      HAVE_GETLOGIN_R=0
      case "$gl_cv_onwards_func_getlogin_r" in
        future*) REPLACE_GETLOGIN_R=1 ;;
      esac
    else
      HAVE_GETLOGIN_R=1
      dnl On Mac OS X 10.13 and OSF/1 5.1, getlogin_r returns a truncated result
      dnl if the buffer is not large enough.
      AC_REQUIRE([AC_CANONICAL_HOST])
      AC_CACHE_CHECK([whether getlogin_r works with small buffers],
        [gl_cv_func_getlogin_r_works],
        [
          dnl Initial guess, used when cross-compiling.
  changequote(,)dnl
          case "$host_os" in
                            # Guess no on Mac OS X, OSF/1.
            darwin* | osf*) gl_cv_func_getlogin_r_works="guessing no" ;;
                            # Guess yes otherwise.
            *)              gl_cv_func_getlogin_r_works="guessing yes" ;;
          esac
  changequote([,])dnl
          AC_RUN_IFELSE(
            [AC_LANG_SOURCE([[
  #include <stddef.h>
  #include <string.h>
  #include <unistd.h>
  #if !HAVE_DECL_GETLOGIN_R
  extern
  # ifdef __cplusplus
  "C"
  # endif
  int getlogin_r (char *, size_t);
  #endif
  int
  main (void)
  {
    int result = 0;
    char buf[100];
  
    if (getlogin_r (buf, 0) == 0)
      result |= 1;
    if (getlogin_r (buf, 1) == 0)
      result |= 2;
    if (getlogin_r (buf, 100) == 0)
      {
        size_t n = strlen (buf);
        if (getlogin_r (buf, n) == 0)
          result |= 4;
      }
    return result;
  }]])],
            [gl_cv_func_getlogin_r_works=yes],
            [gl_cv_func_getlogin_r_works=no],
            [:])
        ])
      case "$gl_cv_func_getlogin_r_works" in
        *yes) ;;
        *) REPLACE_GETLOGIN_R=1 ;;
      esac
    fi
  ])
  
  AC_DEFUN([gl_PREREQ_GETLOGIN_R],
  [
    AC_CHECK_DECLS_ONCE([getlogin])
  ])
  

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