161 lines
4.2 KiB
Plaintext
161 lines
4.2 KiB
Plaintext
# pty.m4
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# serial 20
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dnl Copyright (C) 2010-2024 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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dnl This file is offered as-is, without any warranty.
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# gl_PTY_LIB
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# ----------
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# Define automake variable PTY_LIB to the library needed (if any).
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AC_DEFUN([gl_PTY_LIB],
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[
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AC_REQUIRE([AC_CANONICAL_HOST])
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# Check for the library required for forkpty.
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PTY_LIB=
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case "$host_os" in
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haiku*) PTY_LIB='-lbsd' ;;
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*)
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saved_LIBS="$LIBS"
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AC_SEARCH_LIBS([forkpty], [util],
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[if test "$ac_cv_search_forkpty" != "none required"; then
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PTY_LIB="$ac_cv_search_forkpty"
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fi
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])
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LIBS="$saved_LIBS"
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;;
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esac
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AC_SUBST([PTY_LIB])
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])
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AC_DEFUN([gl_FUNC_FORKPTY],
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[
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AC_REQUIRE([gl_PTY_LIB])
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AC_REQUIRE([gl_PTY_H])
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dnl We assume that forkpty exists (possibly in libc, possibly in libutil or
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dnl libbsd) if and only if it is declared.
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AC_CHECK_DECLS([forkpty],,, [[
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/* <sys/types.h> is a prerequisite of <libutil.h> on FreeBSD 8.0. */
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#include <sys/types.h>
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#if HAVE_PTY_H
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# include <pty.h>
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#endif
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#if HAVE_UTIL_H
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# include <util.h>
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#endif
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#if HAVE_LIBUTIL_H
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# include <libutil.h>
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#endif
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#if HAVE_TERMIOS_H
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# include <termios.h>
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#endif
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]])
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if test $ac_cv_have_decl_forkpty = yes; then
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dnl The system has forkpty.
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dnl Prefer glibc's const-safe prototype, if available.
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AC_CACHE_CHECK([for const-safe forkpty signature],
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[gl_cv_func_forkpty_const],
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[AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM([[
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/* <sys/types.h> is a prerequisite of <libutil.h> on FreeBSD 8.0. */
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#include <sys/types.h>
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#if HAVE_PTY_H
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# include <pty.h>
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#endif
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#if HAVE_UTIL_H
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# include <util.h>
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#endif
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#if HAVE_LIBUTIL_H
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# include <libutil.h>
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#endif
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#if HAVE_TERMIOS_H
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# include <termios.h>
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#endif
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]], [[
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int forkpty (int *, char *, struct termios const *,
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struct winsize const *);
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]])
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],
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[gl_cv_func_forkpty_const=yes], [gl_cv_func_forkpty_const=no])
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])
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if test $gl_cv_func_forkpty_const != yes; then
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REPLACE_FORKPTY=1
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fi
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else
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dnl The system does not have forkpty.
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HAVE_FORKPTY=0
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fi
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AC_DEFINE_UNQUOTED([HAVE_FORKPTY], [$HAVE_FORKPTY],
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[Define to 1 if the system has the 'forkpty' function.])
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])
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AC_DEFUN([gl_FUNC_OPENPTY],
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[
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AC_REQUIRE([gl_PTY_LIB])
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AC_REQUIRE([gl_PTY_H])
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dnl Persuade Solaris <stdlib.h> to declare posix_openpt().
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AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
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dnl We assume that openpty exists (possibly in libc, possibly in libutil or
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dnl libbsd) if and only if it is declared.
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AC_CHECK_DECLS([openpty],,, [[
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/* <sys/types.h> is a prerequisite of <libutil.h> on FreeBSD 8.0. */
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#include <sys/types.h>
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#if HAVE_PTY_H
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# include <pty.h>
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#endif
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#if HAVE_UTIL_H
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# include <util.h>
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#endif
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#if HAVE_LIBUTIL_H
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# include <libutil.h>
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#endif
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#if HAVE_TERMIOS_H
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# include <termios.h>
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#endif
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]])
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if test $ac_cv_have_decl_openpty = yes; then
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AC_DEFINE([HAVE_OPENPTY], [1],
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[Define to 1 if the system has the 'openpty' function.])
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dnl The system has openpty.
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dnl Prefer glibc's const-safe prototype, if available.
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AC_CACHE_CHECK([for const-safe openpty signature],
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[gl_cv_func_openpty_const],
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[AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM([[
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/* <sys/types.h> is a prerequisite of <libutil.h> on FreeBSD 8.0. */
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#include <sys/types.h>
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#if HAVE_PTY_H
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# include <pty.h>
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#endif
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#if HAVE_UTIL_H
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# include <util.h>
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#endif
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#if HAVE_LIBUTIL_H
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# include <libutil.h>
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#endif
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#if HAVE_TERMIOS_H
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# include <termios.h>
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#endif
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]], [[
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int openpty (int *, int *, char *, struct termios const *,
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struct winsize const *);
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]])
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],
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[gl_cv_func_openpty_const=yes], [gl_cv_func_openpty_const=no])
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])
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if test $gl_cv_func_openpty_const != yes; then
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REPLACE_OPENPTY=1
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fi
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else
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dnl The system does not have openpty.
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HAVE_OPENPTY=0
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dnl Prerequisites of lib/openpty.c in this case.
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AC_CHECK_FUNCS([_getpty])
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gl_CHECK_FUNCS_ANDROID([posix_openpt], [[#include <stdlib.h>]])
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fi
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])
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