-# pty.m4 serial 4
-dnl Copyright (C) 2010 Free Software Foundation, Inc.
+# pty.m4 serial 12
+dnl Copyright (C) 2010-2012 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.
AC_SUBST([PTY_LIB])
])
-AC_DEFUN([gl_FORKPTY],
+AC_DEFUN([gl_FUNC_FORKPTY],
[
AC_REQUIRE([gl_PTY_LIB])
AC_REQUIRE([gl_PTY_H])
+ dnl We assume that forkpty exists (possibly in libc, possibly in libutil)
+ dnl if and only if it is declared.
AC_CHECK_DECLS([forkpty],,, [[
+/* <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
# include <libutil.h>
#endif
]])
- if test $ac_cv_have_decl_forkpty = no; then
- AC_MSG_WARN([[Cannot find forkpty, build will likely fail]])
- fi
-
- dnl Prefer glibc's const-safe prototype, if available.
- AC_CACHE_CHECK([for const-safe forkpty signature],
- [gl_cv_func_forkpty_const],
- [AC_COMPILE_IFELSE(
- [AC_LANG_PROGRAM([[
+ if test $ac_cv_have_decl_forkpty = yes; then
+ dnl The system has forkpty.
+ dnl Prefer glibc's const-safe prototype, if available.
+ AC_CACHE_CHECK([for const-safe forkpty signature],
+ [gl_cv_func_forkpty_const],
+ [AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM([[
+/* <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_LIBUTIL_H
# include <libutil.h>
#endif
- ]], [[
- int forkpty (int *, char *, struct termios const *,
- struct winsize const *);
- ]])],
- [gl_cv_func_forkpty_const=yes], [gl_cv_func_forkpty_const=no])])
- if test $gl_cv_func_forkpty_const != yes; then
- REPLACE_FORKPTY=1
- AC_LIBOBJ([forkpty])
+ ]], [[
+ int forkpty (int *, char *, struct termios const *,
+ struct winsize const *);
+ ]])
+ ],
+ [gl_cv_func_forkpty_const=yes], [gl_cv_func_forkpty_const=no])
+ ])
+ if test $gl_cv_func_forkpty_const != yes; then
+ REPLACE_FORKPTY=1
+ fi
+ else
+ dnl The system does not have forkpty.
+ HAVE_FORKPTY=0
fi
])
-AC_DEFUN([gl_OPENPTY],
+AC_DEFUN([gl_FUNC_OPENPTY],
[
AC_REQUIRE([gl_PTY_LIB])
AC_REQUIRE([gl_PTY_H])
dnl We assume that openpty exists (possibly in libc, possibly in libutil)
dnl if and only if it is declared.
AC_CHECK_DECLS([openpty],,, [[
+/* <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
[gl_cv_func_openpty_const],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[
+/* <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 test $gl_cv_func_openpty_const != yes; then
REPLACE_OPENPTY=1
- AC_LIBOBJ([openpty])
+ AC_DEFINE([HAVE_OPENPTY], [1],
+ [Define to 1 if the system has the 'openpty' function.])
fi
else
dnl The system does not have openpty.
HAVE_OPENPTY=0
- AC_LIBOBJ([openpty])
+ dnl Prerequisites of lib/openpty.c in this case.
AC_CHECK_FUNCS([_getpty posix_openpt])
fi
])
[
AC_REQUIRE([gl_PTY_LIB])
- AC_CHECK_FUNCS_ONCE([login_tty])
- if test $ac_cv_func_login_tty = no; then
- AC_LIBOBJ([login_tty])
- fi
+ gl_saved_libs="$LIBS"
+ LIBS="$LIBS $PTY_LIB"
+ AC_CHECK_FUNCS([login_tty])
+ LIBS="$gl_saved_LIBS"
])