m4/jm-winsz1.m4

   1 # serial 12
   2
   3 # Copyright (C) 1996, 1999, 2001-2002, 2004, 2006, 2009-2021 Free Software
   4 # Foundation, Inc.
   5 # This file is free software; the Free Software Foundation
   6 # gives unlimited permission to copy and/or distribute it,
   7 # with or without modifications, as long as this notice is preserved.
   8
   9 dnl From Jim Meyering and Paul Eggert.
  10 AC_DEFUN([gl_HEADER_TIOCGWINSZ_IN_TERMIOS_H],
  11 [AC_REQUIRE([AC_SYS_POSIX_TERMIOS])
  12  AC_CACHE_CHECK([whether use of TIOCGWINSZ requires termios.h],
  13                 [gl_cv_sys_tiocgwinsz_needs_termios_h],
  14   [gl_cv_sys_tiocgwinsz_needs_termios_h=no
  15
  16    if test $ac_cv_sys_posix_termios = yes; then
  17      AC_EGREP_CPP([yes],
  18      [#include <sys/types.h>
  19 #      include <termios.h>
  20 #      ifdef TIOCGWINSZ
  21          yes
  22 #      endif
  23      ], [gl_cv_sys_tiocgwinsz_needs_termios_h=yes])
  24    fi
  25   ])
  26 ])
  27
  28 AC_DEFUN([gl_WINSIZE_IN_PTEM],
  29 [
  30    AC_REQUIRE([AC_SYS_POSIX_TERMIOS])
  31    AC_CACHE_CHECK([whether use of struct winsize requires sys/ptem.h],
  32      [gl_cv_sys_struct_winsize_needs_sys_ptem_h],
  33      [gl_cv_sys_struct_winsize_needs_sys_ptem_h=yes
  34       if test $ac_cv_sys_posix_termios = yes; then
  35         AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <termios.h>]],
  36           [[struct winsize x;
  37             if (sizeof x > 0) return 0;]])],
  38           [gl_cv_sys_struct_winsize_needs_sys_ptem_h=no])
  39       fi
  40       if test $gl_cv_sys_struct_winsize_needs_sys_ptem_h = yes; then
  41         AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/ptem.h>]],
  42           [[struct winsize x;
  43             if (sizeof x > 0) return 0;]])],
  44           [], [gl_cv_sys_struct_winsize_needs_sys_ptem_h=no])
  45       fi])
  46    if test $gl_cv_sys_struct_winsize_needs_sys_ptem_h = yes; then
  47      AC_DEFINE([WINSIZE_IN_PTEM], [1],
  48        [Define if sys/ptem.h is required for struct winsize.])
  49    fi
  50 ])