-# pty.m4 serial 1
-dnl Copyright (C) 2009 Free Software Foundation, Inc.
+# pty.m4 serial 13
+dnl Copyright (C) 2010-2013 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
-# ------
-# Make sure that pty.h provides forkpty, or sets up a replacement header.
-# Also define automake variable PTY_LIB to the library needed (if any).
-AC_DEFUN([gl_PTY],
+# gl_PTY_LIB
+# ----------
+# Define automake variable PTY_LIB to the library needed (if any).
+AC_DEFUN([gl_PTY_LIB],
[
- PTY_H=''
- PTY_LIB=''
- # First 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
- AC_CHECK_DECL([forkpty],,, [[#include <util.h>]])
- if test $ac_cv_have_decl_forkpty = no; then
- AC_CHECK_DECL([forkpty],,, [[#include <libutil.h>]])
- if test $ac_cv_have_decl_forkpty = no; then
- AC_MSG_WARN([[Cannot find forkpty, build will likely fail]])
- else
- PTY_H='pty.h'
- PTY_HEADER='libutil.h'
- fi
- else
- PTY_H='pty.h'
- PTY_HEADER='util.h'
- fi
- fi
- # Second check for the library required for forkpty.
+ # Check for the library required for forkpty.
+ PTY_LIB=
save_LIBS="$LIBS"
AC_SEARCH_LIBS([forkpty], [util],
[if test "$ac_cv_search_forkpty" != "none required"; then
PTY_LIB="$ac_cv_search_forkpty"
fi])
LIBS="$save_LIBS"
- AC_SUBST([PTY_H])
AC_SUBST([PTY_LIB])
- AC_SUBST([PTY_HEADER])
+])
+
+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
+#if HAVE_UTIL_H
+# include <util.h>
+#endif
+#if HAVE_LIBUTIL_H
+# include <libutil.h>
+#endif
+]])
+ 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_UTIL_H
+# include <util.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 $gl_cv_func_forkpty_const != yes; then
+ REPLACE_FORKPTY=1
+ fi
+ else
+ dnl The system does not have forkpty.
+ HAVE_FORKPTY=0
+ fi
+ AC_DEFINE_UNQUOTED([HAVE_FORKPTY], [$HAVE_FORKPTY],
+ [Define to 1 if the system has the 'forkpty' function.])
+])
+
+AC_DEFUN([gl_FUNC_OPENPTY],
+[
+ AC_REQUIRE([gl_PTY_LIB])
+ AC_REQUIRE([gl_PTY_H])
+
+ dnl Persuade Solaris <stdlib.h> to declare posix_openpt().
+ AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+ 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
+#if HAVE_UTIL_H
+# include <util.h>
+#endif
+#if HAVE_LIBUTIL_H
+# include <libutil.h>
+#endif
+]])
+ if test $ac_cv_have_decl_openpty = yes; then
+ AC_DEFINE([HAVE_OPENPTY], [1],
+ [Define to 1 if the system has the 'openpty' function.])
+ dnl The system has openpty.
+ dnl Prefer glibc's const-safe prototype, if available.
+ AC_CACHE_CHECK([for const-safe openpty signature],
+ [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 HAVE_UTIL_H
+# include <util.h>
+#endif
+#if HAVE_LIBUTIL_H
+# include <libutil.h>
+#endif
+ ]], [[
+ int openpty (int *, int *, char *, struct termios const *,
+ struct winsize const *);
+ ]])
+ ],
+ [gl_cv_func_openpty_const=yes], [gl_cv_func_openpty_const=no])
+ ])
+ if test $gl_cv_func_openpty_const != yes; then
+ REPLACE_OPENPTY=1
+ fi
+ else
+ dnl The system does not have openpty.
+ HAVE_OPENPTY=0
+ dnl Prerequisites of lib/openpty.c in this case.
+ AC_CHECK_FUNCS([_getpty posix_openpt])
+ fi
+])
+
+AC_DEFUN([gl_FUNC_LOGIN_TTY],
+[
+ AC_REQUIRE([gl_PTY_LIB])
+
+ gl_saved_libs="$LIBS"
+ LIBS="$LIBS $PTY_LIB"
+ AC_CHECK_FUNCS([login_tty])
+ LIBS="$gl_saved_LIBS"
])
projects / gnulib.git / blobdiff