[thirdparty/gcc.git] / c++tools / configure.ac

# Configure script for c++tools
#   Copyright (C) 2020 Free Software Foundation, Inc.
#   Written by Nathan Sidwell <nathan@acm.org> while at FaceBook
#
# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; see the file COPYING3.  If not see
# <http://www.gnu.org/licenses/>.

# C++ has grown a C++20 mapper server.  This may be used to provide
# and/or learn and/or build required modules.  This sample server
# shows how the protocol introduced by wg21.link/p1184 may be used.
# By default g++ uses an in-process mapper.

sinclude(../config/acx.m4)

AC_INIT(c++tools)

AC_CONFIG_SRCDIR([server.cc])

# Determine the noncanonical names used for directories.
ACX_NONCANONICAL_TARGET

AC_CANONICAL_SYSTEM
AC_PROG_INSTALL
test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}'
AC_SUBST(INSTALL_PROGRAM)

AC_PROG_CXX
MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
AC_CHECK_PROGS([AUTOCONF], [autoconf], [$MISSING autoconf])
AC_CHECK_PROGS([AUTOHEADER], [autoheader], [$MISSING autoheader])

dnl Enabled by default
AC_MSG_CHECKING([whether to build C++ tools])
  AC_ARG_ENABLE(c++-tools, 
    [AS_HELP_STRING([--enable-c++-tools],
		    [build auxiliary c++ tools])],
      cxx_aux_tools=$enableval,
      cxx_aux_tools=yes)

AC_MSG_RESULT($cxx_aux_tools)
CXX_AUX_TOOLS="$cxx_aux_tools"
AC_SUBST(CXX_AUX_TOOLS)

AC_ARG_ENABLE([maintainer-mode],
AS_HELP_STRING([--enable-maintainer-mode],
[enable maintainer mode.  Add rules to rebuild configurey bits]),,
[enable_maintainer_mode=no])
case "$enable_maintainer_mode" in
  ("yes") maintainer_mode=yes ;;
  ("no") maintainer=no ;;
  (*) AC_MSG_ERROR([unknown maintainer mode $enable_maintainer_mode]) ;;
esac
AC_MSG_CHECKING([maintainer-mode])
AC_MSG_RESULT([$maintainer_mode])
test "$maintainer_mode" = yes && MAINTAINER=yes
AC_SUBST(MAINTAINER)

# Check whether --enable-default-pie was given.
AC_ARG_ENABLE(default-pie,
[AS_HELP_STRING([--enable-default-pie],
		  [enable Position Independent Executable as default])],
[PIEFLAG=-fPIE], [PIEFLAG=])
AC_SUBST([PIEFLAG])

# Check if O_CLOEXEC is defined by fcntl
AC_CACHE_CHECK(for O_CLOEXEC, ac_cv_o_cloexec, [
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <fcntl.h>]], [[
return open ("/dev/null", O_RDONLY | O_CLOEXEC);]])],
[ac_cv_o_cloexec=yes],[ac_cv_o_cloexec=no])])
if test $ac_cv_o_cloexec = yes; then
  AC_DEFINE(HOST_HAS_O_CLOEXEC, 1,
  [Define if O_CLOEXEC supported by fcntl.])
fi

AC_CHECK_HEADERS(sys/mman.h)

# C++ Modules would like some networking features to provide the mapping
# server.  You can still use modules without them though.
# The following network-related checks could probably do with some
# Windows and other non-linux defenses and checking.

# Local socket connectivity wants AF_UNIX networking
# Check for AF_UNIX networking
AC_CACHE_CHECK(for AF_UNIX, ac_cv_af_unix, [
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <netinet/in.h>]],[[
sockaddr_un un;
un.sun_family = AF_UNSPEC;
int fd = socket (AF_UNIX, SOCK_STREAM, 0);
connect (fd, (sockaddr *)&un, sizeof (un));]])],
[ac_cv_af_unix=yes],
[ac_cv_af_unix=no])])
if test $ac_cv_af_unix = yes; then
  AC_DEFINE(HAVE_AF_UNIX, 1,
  [Define if AF_UNIX supported.])
fi

# Remote socket connectivity wants AF_INET6 networking
# Check for AF_INET6 networking
AC_CACHE_CHECK(for AF_INET6, ac_cv_af_inet6, [
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>]],[[
sockaddr_in6 in6;
in6.sin6_family = AF_UNSPEC;
struct addrinfo *addrs = 0;
struct addrinfo hints;
hints.ai_flags = 0;
hints.ai_family = AF_INET6;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = 0;
hints.ai_canonname = 0;
hints.ai_addr = 0;
hints.ai_next = 0;
int e = getaddrinfo ("localhost", 0, &hints, &addrs);
const char *str = gai_strerror (e);
freeaddrinfo (addrs);
int fd = socket (AF_INET6, SOCK_STREAM, 0);
connect (fd, (sockaddr *)&in6, sizeof (in6));]])],
[ac_cv_af_inet6=yes],
[ac_cv_af_inet6=no])])
if test $ac_cv_af_inet6 = yes; then
  AC_DEFINE(HAVE_AF_INET6, 1,
  [Define if AF_INET6 supported.])
fi

# Efficient server response wants epoll
# Check for epoll_create, epoll_ctl, epoll_pwait
AC_CACHE_CHECK(for epoll, ac_cv_epoll, [
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/epoll.h>]],[[
int fd = epoll_create (1);
epoll_event ev;
ev.events = EPOLLIN;
ev.data.fd = 0;
epoll_ctl (fd, EPOLL_CTL_ADD, 0, &ev);
epoll_pwait (fd, 0, 0, -1, 0);]])],
[ac_cv_epoll=yes],
[ac_cv_epoll=no])])
if test $ac_cv_epoll = yes; then
  AC_DEFINE(HAVE_EPOLL, 1,
  [Define if epoll_create, epoll_ctl, epoll_pwait provided.])
fi

# If we can't use epoll, try pselect.
# Check for pselect
AC_CACHE_CHECK(for pselect, ac_cv_pselect, [
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/select.h>]],[[
pselect (0, 0, 0, 0, 0, 0);]])],
[ac_cv_pselect=yes],
[ac_cv_pselect=no])])
if test $ac_cv_pselect = yes; then
  AC_DEFINE(HAVE_PSELECT, 1,
  [Define if pselect provided.])
fi

# And failing that, use good old select.
# If we can't even use this, the server is serialized.
# Check for select
AC_CACHE_CHECK(for select, ac_cv_select, [
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/select.h>]],[[
select (0, 0, 0, 0, 0);]])],
[ac_cv_select=yes],
[ac_cv_select=no])])
if test $ac_cv_select = yes; then
  AC_DEFINE(HAVE_SELECT, 1,
  [Define if select provided.])
fi

# Avoid some fnctl calls by using accept4, when available.
# Check for accept4
AC_CACHE_CHECK(for accept4, ac_cv_accept4, [
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/socket.h>]],[[
int err = accept4 (1, 0, 0, SOCK_NONBLOCK);]])],
[ac_cv_accept4=yes],
[ac_cv_accept4=no])])
if test $ac_cv_accept4 = yes; then
  AC_DEFINE(HAVE_ACCEPT4, 1,
  [Define if accept4 provided.])
fi

# For better server messages, look for a way to stringize network addresses
# Check for inet_ntop
AC_CACHE_CHECK(for inet_ntop, ac_cv_inet_ntop, [
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <arpa/inet.h>
#include <netinet/in.h>]],[[
sockaddr_in6 in6;
char buf[INET6_ADDRSTRLEN];
const char *str = inet_ntop (AF_INET6, &in6, buf, sizeof (buf));]])],
[ac_cv_inet_ntop=yes],
[ac_cv_inet_ntop=no])])
if test $ac_cv_inet_ntop = yes; then
  AC_DEFINE(HAVE_INET_NTOP, 1,
  [Define if inet_ntop provided.])
fi

# Determine what GCC version number to use in filesystem paths.
GCC_BASE_VER

AC_CONFIG_HEADERS([config.h])
AC_CONFIG_FILES([Makefile])

AC_OUTPUT
Commit	Line	Data
35fc243f NS	1	# Configure script for c++tools
	2	# Copyright (C) 2020 Free Software Foundation, Inc.
	3	# Written by Nathan Sidwell <nathan@acm.org> while at FaceBook
	4	#
	5	# This file is free software; you can redistribute it and/or modify it
	6	# under the terms of the GNU General Public License as published by
	7	# the Free Software Foundation; either version 3 of the License, or
	8	# (at your option) any later version.
	9	#
	10	# This program is distributed in the hope that it will be useful, but
	11	# WITHOUT ANY WARRANTY; without even the implied warranty of
	12	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	# General Public License for more details.
	14	#
	15	# You should have received a copy of the GNU General Public License
	16	# along with this program; see the file COPYING3. If not see
	17	# <http://www.gnu.org/licenses/>.
	18
	19	# C++ has grown a C++20 mapper server. This may be used to provide
	20	# and/or learn and/or build required modules. This sample server
	21	# shows how the protocol introduced by wg21.link/p1184 may be used.
	22	# By default g++ uses an in-process mapper.
	23
	24	sinclude(../config/acx.m4)
	25
	26	AC_INIT(c++tools)
	27
	28	AC_CONFIG_SRCDIR([server.cc])
	29
	30	# Determine the noncanonical names used for directories.
	31	ACX_NONCANONICAL_TARGET
	32
	33	AC_CANONICAL_SYSTEM
	34	AC_PROG_INSTALL
3f78c8cb NS	35	test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}'
3f78c8cb NS	36	AC_SUBST(INSTALL_PROGRAM)
35fc243f NS	37
	38	AC_PROG_CXX
	39	MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
	40	AC_CHECK_PROGS([AUTOCONF], [autoconf], [$MISSING autoconf])
	41	AC_CHECK_PROGS([AUTOHEADER], [autoheader], [$MISSING autoheader])
	42
	43	dnl Enabled by default
	44	AC_MSG_CHECKING([whether to build C++ tools])
	45	AC_ARG_ENABLE(c++-tools,
	46	[AS_HELP_STRING([--enable-c++-tools],
	47	[build auxiliary c++ tools])],
	48	cxx_aux_tools=$enableval,
	49	cxx_aux_tools=yes)
	50
	51	AC_MSG_RESULT($cxx_aux_tools)
	52	CXX_AUX_TOOLS="$cxx_aux_tools"
	53	AC_SUBST(CXX_AUX_TOOLS)
	54
	55	AC_ARG_ENABLE([maintainer-mode],
	56	AS_HELP_STRING([--enable-maintainer-mode],
	57	[enable maintainer mode. Add rules to rebuild configurey bits]),,
	58	[enable_maintainer_mode=no])
	59	case "$enable_maintainer_mode" in
	60	("yes") maintainer_mode=yes ;;
	61	("no") maintainer=no ;;
	62	(*) AC_MSG_ERROR([unknown maintainer mode $enable_maintainer_mode]) ;;
	63	esac
	64	AC_MSG_CHECKING([maintainer-mode])
	65	AC_MSG_RESULT([$maintainer_mode])
	66	test "$maintainer_mode" = yes && MAINTAINER=yes
	67	AC_SUBST(MAINTAINER)
	68
544f4775 NS	69	# Check whether --enable-default-pie was given.
	70	AC_ARG_ENABLE(default-pie,
	71	[AS_HELP_STRING([--enable-default-pie],
	72	[enable Position Independent Executable as default])],
	73	[PIEFLAG=-fPIE], [PIEFLAG=])
	74	AC_SUBST([PIEFLAG])
	75
35fc243f NS	76	# Check if O_CLOEXEC is defined by fcntl
	77	AC_CACHE_CHECK(for O_CLOEXEC, ac_cv_o_cloexec, [
	78	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
	79	#include <fcntl.h>]], [[
	80	return open ("/dev/null", O_RDONLY \| O_CLOEXEC);]])],
	81	[ac_cv_o_cloexec=yes],[ac_cv_o_cloexec=no])])
	82	if test $ac_cv_o_cloexec = yes; then
	83	AC_DEFINE(HOST_HAS_O_CLOEXEC, 1,
	84	[Define if O_CLOEXEC supported by fcntl.])
	85	fi
	86
09616422 NS	87	AC_CHECK_HEADERS(sys/mman.h)
09616422 NS	88
35fc243f NS	89	# C++ Modules would like some networking features to provide the mapping
	90	# server. You can still use modules without them though.
	91	# The following network-related checks could probably do with some
	92	# Windows and other non-linux defenses and checking.
	93
	94	# Local socket connectivity wants AF_UNIX networking
	95	# Check for AF_UNIX networking
	96	AC_CACHE_CHECK(for AF_UNIX, ac_cv_af_unix, [
	97	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
	98	#include <sys/types.h>
	99	#include <sys/socket.h>
	100	#include <sys/un.h>
	101	#include <netinet/in.h>]],[[
	102	sockaddr_un un;
	103	un.sun_family = AF_UNSPEC;
	104	int fd = socket (AF_UNIX, SOCK_STREAM, 0);
	105	connect (fd, (sockaddr *)&un, sizeof (un));]])],
	106	[ac_cv_af_unix=yes],
	107	[ac_cv_af_unix=no])])
	108	if test $ac_cv_af_unix = yes; then
	109	AC_DEFINE(HAVE_AF_UNIX, 1,
	110	[Define if AF_UNIX supported.])
	111	fi
	112
	113	# Remote socket connectivity wants AF_INET6 networking
	114	# Check for AF_INET6 networking
	115	AC_CACHE_CHECK(for AF_INET6, ac_cv_af_inet6, [
	116	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
	117	#include <sys/types.h>
	118	#include <sys/socket.h>
	119	#include <netinet/in.h>
	120	#include <netdb.h>]],[[
	121	sockaddr_in6 in6;
	122	in6.sin6_family = AF_UNSPEC;
	123	struct addrinfo *addrs = 0;
	124	struct addrinfo hints;
	125	hints.ai_flags = 0;
	126	hints.ai_family = AF_INET6;
	127	hints.ai_socktype = SOCK_STREAM;
	128	hints.ai_protocol = 0;
	129	hints.ai_canonname = 0;
	130	hints.ai_addr = 0;
	131	hints.ai_next = 0;
	132	int e = getaddrinfo ("localhost", 0, &hints, &addrs);
	133	const char *str = gai_strerror (e);
	134	freeaddrinfo (addrs);
	135	int fd = socket (AF_INET6, SOCK_STREAM, 0);
	136	connect (fd, (sockaddr *)&in6, sizeof (in6));]])],
	137	[ac_cv_af_inet6=yes],
	138	[ac_cv_af_inet6=no])])
	139	if test $ac_cv_af_inet6 = yes; then
	140	AC_DEFINE(HAVE_AF_INET6, 1,
	141	[Define if AF_INET6 supported.])
	142	fi
	143
	144	# Efficient server response wants epoll
	145	# Check for epoll_create, epoll_ctl, epoll_pwait
	146	AC_CACHE_CHECK(for epoll, ac_cv_epoll, [
	147	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
	148	#include <sys/epoll.h>]],[[
	149	int fd = epoll_create (1);
	150	epoll_event ev;
	151	ev.events = EPOLLIN;
	152	ev.data.fd = 0;
153	epoll_ctl (fd, EPOLL_CTL_ADD, 0, &ev);
154	epoll_pwait (fd, 0, 0, -1, 0);]])],
155	[ac_cv_epoll=yes],
156	[ac_cv_epoll=no])])
157	if test $ac_cv_epoll = yes; then
158	AC_DEFINE(HAVE_EPOLL, 1,
159	[Define if epoll_create, epoll_ctl, epoll_pwait provided.])
160	fi
161
162	# If we can't use epoll, try pselect.
163	# Check for pselect
164	AC_CACHE_CHECK(for pselect, ac_cv_pselect, [
165	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
166	#include <sys/select.h>]],[[
167	pselect (0, 0, 0, 0, 0, 0);]])],
168	[ac_cv_pselect=yes],
169	[ac_cv_pselect=no])])
170	if test $ac_cv_pselect = yes; then
171	AC_DEFINE(HAVE_PSELECT, 1,
172	[Define if pselect provided.])
173	fi
174
175	# And failing that, use good old select.
176	# If we can't even use this, the server is serialized.
177	# Check for select
178	AC_CACHE_CHECK(for select, ac_cv_select, [
179	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
180	#include <sys/select.h>]],[[
181	select (0, 0, 0, 0, 0);]])],
182	[ac_cv_select=yes],
183	[ac_cv_select=no])])
184	if test $ac_cv_select = yes; then
185	AC_DEFINE(HAVE_SELECT, 1,
186	[Define if select provided.])
187	fi
188
189	# Avoid some fnctl calls by using accept4, when available.
190	# Check for accept4
191	AC_CACHE_CHECK(for accept4, ac_cv_accept4, [
192	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
193	#include <sys/socket.h>]],[[
194	int err = accept4 (1, 0, 0, SOCK_NONBLOCK);]])],
195	[ac_cv_accept4=yes],
196	[ac_cv_accept4=no])])
197	if test $ac_cv_accept4 = yes; then
198	AC_DEFINE(HAVE_ACCEPT4, 1,
199	[Define if accept4 provided.])
200	fi
201
202	# For better server messages, look for a way to stringize network addresses
203	# Check for inet_ntop
204	AC_CACHE_CHECK(for inet_ntop, ac_cv_inet_ntop, [
205	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
206	#include <arpa/inet.h>
207	#include <netinet/in.h>]],[[
208	sockaddr_in6 in6;
209	char buf[INET6_ADDRSTRLEN];
210	const char *str = inet_ntop (AF_INET6, &in6, buf, sizeof (buf));]])],
211	[ac_cv_inet_ntop=yes],
212	[ac_cv_inet_ntop=no])])
213	if test $ac_cv_inet_ntop = yes; then
214	AC_DEFINE(HAVE_INET_NTOP, 1,
215	[Define if inet_ntop provided.])
216	fi
217
4e7e7c13 JJ	218	# Determine what GCC version number to use in filesystem paths.
	219	GCC_BASE_VER
	220
35fc243f NS	221	AC_CONFIG_HEADERS([config.h])
	222	AC_CONFIG_FILES([Makefile])
	223
	224	AC_OUTPUT