kc3-lang/gnulib/m4/pty_h.m4

• Show log

  Commit

• 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.
  

Download

• m4/pty_h.m4

• # pty_h.m4 serial 15
  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.
  
  # gl_PTY_H
  # --------
  # Set up the GNU-like <pty.h> replacement header.
  AC_DEFUN_ONCE([gl_PTY_H],
  [
    AC_REQUIRE([gl_PTY_H_DEFAULTS])
  
    # Make sure that pty.h provides forkpty, or setup the replacement.
    AC_CHECK_HEADERS_ONCE([pty.h])
    if test $ac_cv_header_pty_h != yes; then
      HAVE_PTY_H=0
      gl_PTY_CHECK_UTIL_H
      AC_CHECK_HEADERS_ONCE([termios.h])
    else # Have <pty.h>, assume forkpty is declared there.
      HAVE_PTY_H=1
    fi
    AC_SUBST([HAVE_PTY_H])
    dnl <pty.h> is always overridden, because of GNULIB_POSIXCHECK.
    gl_CHECK_NEXT_HEADERS([pty.h])
  
    dnl Check for declarations of anything we want to poison if the
    dnl corresponding gnulib module is not in use.
    gl_WARN_ON_USE_PREPARE([[
  /* <sys/types.h> is a prerequisite of <libutil.h> on FreeBSD 8.0.  */
  #include <sys/types.h>
  #if HAVE_PTY_H
  # include <pty.h>
  #endif
  #if HAVE_UTIL_H
  # include <util.h>
  #endif
  #if HAVE_LIBUTIL_H
  # include <libutil.h>
  #endif
  #if HAVE_TERMIOS_H
  # include <termios.h>
  #endif
      ]], [forkpty openpty])
  ])
  
  dnl Test for <util.h> and <libutil.h>.
  AC_DEFUN([gl_PTY_CHECK_UTIL_H],
  [
    AC_REQUIRE([gl_PTY_H_DEFAULTS])
    AC_CHECK_HEADERS([util.h libutil.h])
    if test $ac_cv_header_util_h = yes; then
      HAVE_UTIL_H=1
    fi
    if test $ac_cv_header_libutil_h = yes; then
      HAVE_LIBUTIL_H=1
    fi
  ])
  
  # gl_PTY_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_PTY_MODULE_INDICATOR],
  [
    dnl Ensure to expand the default settings once only.
    gl_PTY_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_PTY_H_REQUIRE_DEFAULTS],
  [
    m4_defun(GL_MODULE_INDICATOR_PREFIX[_PTY_H_MODULE_INDICATOR_DEFAULTS], [
      gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FORKPTY])
      gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_OPENPTY])
    ])
    m4_require(GL_MODULE_INDICATOR_PREFIX[_PTY_H_MODULE_INDICATOR_DEFAULTS])
    AC_REQUIRE([gl_PTY_H_DEFAULTS])
  ])
  
  AC_DEFUN([gl_PTY_H_DEFAULTS],
  [
    dnl Assume proper GNU behavior unless another module says otherwise.
    HAVE_UTIL_H=0;        AC_SUBST([HAVE_UTIL_H])
    HAVE_LIBUTIL_H=0;     AC_SUBST([HAVE_LIBUTIL_H])
    HAVE_FORKPTY=1;       AC_SUBST([HAVE_FORKPTY])
    HAVE_OPENPTY=1;       AC_SUBST([HAVE_OPENPTY])
    REPLACE_FORKPTY=0;    AC_SUBST([REPLACE_FORKPTY])
    REPLACE_OPENPTY=0;    AC_SUBST([REPLACE_OPENPTY])
  ])
  

Download