kc3-lang/gnulib/m4/utmp_h.m4

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• Hash : ffb4ed84
  Author :
  Date : 2023-04-13T21:43:51
  

  utmp: Avoid using HAVE_* macros in *.in.h files.
  
  * m4/pty_h.m4 (gl_PTY_CHECK_UTIL_H): New macro, extracted from gl_PTY_H.
  (gl_PTY_H): Invoke it.
  * m4/utmp_h.m4 (gl_UTMP_H): Invoke gl_PTY_CHECK_UTIL_H and set
  HAVE_TERMIOS_H.
  (gl_UTMP_H_DEFAULTS): Require gl_PTY_H_DEFAULTS, gl_TERMIOS_H_DEFAULTS.
  * modules/utmp (Files): Add m4/pty_h.m4, m4/termios_h.m4.
  (Makefile.am): Substitute also HAVE_UTIL_H, HAVE_LIBUTIL_H,
  HAVE_TERMIOS_H.
  * lib/utmp.in.h: Test HAVE_UTIL_H, HAVE_LIBUTIL_H, HAVE_TERMIOS_H as
  Autoconf variables.
  

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• m4/utmp_h.m4

• # Configure a GNU-like replacement for <utmp.h>.
  
  # Copyright (C) 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.
  
  # serial 2
  
  AC_DEFUN_ONCE([gl_UTMP_H],
  [
    dnl Ensure to expand the default settings once only, before all statements
    dnl that occur in other macros.
    AC_REQUIRE([gl_UTMP_H_DEFAULTS])
  
    gl_CHECK_NEXT_HEADERS([utmp.h])
    if test $ac_cv_header_utmp_h = yes; then
      HAVE_UTMP_H=1
    else
      HAVE_UTMP_H=0
    fi
    AC_SUBST([HAVE_UTMP_H])
  
    gl_PTY_CHECK_UTIL_H
  
    AC_CHECK_HEADERS_ONCE([termios.h])
    if test $ac_cv_header_termios_h != yes; then
      HAVE_TERMIOS_H=0
    fi
  
    dnl Check for declarations of anything we want to poison if the
    dnl corresponding gnulib module is not in use, and which is not
    dnl guaranteed by C89.
    gl_WARN_ON_USE_PREPARE([[
        #include <sys/types.h>
        #include <utmp.h>
      ]],
      [login_tty])
  ])
  
  # gl_UTMP_MODULE_INDICATOR([modulename])
  # sets the shell variable that indicates the presence of the given module
  # to a C preprocessor expression that will evaluate to 1.
  # This macro invocation must not occur in macros that are AC_REQUIREd.
  AC_DEFUN([gl_UTMP_MODULE_INDICATOR],
  [
    dnl Ensure to expand the default settings once only.
    gl_UTMP_H_REQUIRE_DEFAULTS
    gl_MODULE_INDICATOR_SET_VARIABLE([$1])
    dnl Define it also as a C macro, for the benefit of the unit tests.
    gl_MODULE_INDICATOR_FOR_TESTS([$1])
  ])
  
  # Initializes the default values for AC_SUBSTed shell variables.
  # This macro must not be AC_REQUIREd.  It must only be invoked, and only
  # outside of macros or in macros that are not AC_REQUIREd.
  AC_DEFUN([gl_UTMP_H_REQUIRE_DEFAULTS],
  [
    m4_defun(GL_MODULE_INDICATOR_PREFIX[_UTMP_H_MODULE_INDICATOR_DEFAULTS], [
      gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_LOGIN_TTY])
    ])
    m4_require(GL_MODULE_INDICATOR_PREFIX[_UTMP_H_MODULE_INDICATOR_DEFAULTS])
    AC_REQUIRE([gl_UTMP_H_DEFAULTS])
  ])
  
  AC_DEFUN([gl_UTMP_H_DEFAULTS],
  [
    dnl For HAVE_UTIL_H, HAVE_LIBUTIL_H.
    AC_REQUIRE([gl_PTY_H_DEFAULTS])
    dnl For HAVE_TERMIOS_H.
    AC_REQUIRE([gl_TERMIOS_H_DEFAULTS])
    dnl Assume proper GNU behavior unless another module says otherwise.
    HAVE_LOGIN_TTY=1;             AC_SUBST([HAVE_LOGIN_TTY])
    REPLACE_LOGIN_TTY=0;          AC_SUBST([REPLACE_LOGIN_TTY])
  ])
  

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