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

# Configure script for c++tools
#   Copyright (C) 2020-2022 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)
sinclude(../config/ax_lib_socket_nsl.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])

AC_LANG(C++)

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_mode=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)

# Handle configuration of checking; for the tools in this directory we
# default to release checking and stricter checks do not change this.

AC_ARG_ENABLE(checking,
[AS_HELP_STRING([[--enable-checking[=LIST]]],
		[enable expensive run-time checks.  With LIST,
		 enable only specific categories of checks.
		 Categories are: yes,no,all,none,release.])],
[ac_checking_flags="${enableval}"],[
# Default to checking.
ac_checking_flags=yes
])
IFS="${IFS= 	}"; ac_save_IFS="$IFS"; IFS="$IFS,"
for check in release $ac_checking_flags
do
	case $check in
	# these set all the flags to specific states
	yes|all|release|assert) ac_assert_checking=1 ; ;;
	no|none) ac_assert_checking= ; ;;
	*) ;;
	esac
done
IFS="$ac_save_IFS"

if test x$ac_assert_checking != x ; then
  AC_DEFINE(ENABLE_ASSERT_CHECKING, 1,
[Define if you want assertions enabled.  This is a cheap check.])
fi

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

# Enable --enable-host-pie
AC_ARG_ENABLE(host-pie,
[AS_HELP_STRING([--enable-host-pie],
		[build host code as PIE])],
[PICFLAG=-fPIE; LD_PICFLAG=-pie], [])
AC_SUBST(PICFLAG)
AC_SUBST(LD_PICFLAG)

# 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

# Solaris needs libsocket and libnsl for socket functions before 11.4.
# libcody uses those.
save_LIBS="$LIBS"
LIBS=
AX_LIB_SOCKET_NSL
NETLIBS="$LIBS"
LIBS="$save_LIBS"
AC_SUBST(NETLIBS)

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

AC_OUTPUT
Commit	Line	Data
35fc243f	1	# Configure script for c++tools
7adcbafe	2	# Copyright (C) 2020-2022 Free Software Foundation, Inc.
35fc243f NS	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)
a20893cf	25	sinclude(../config/ax_lib_socket_nsl.m4)
35fc243f NS	26
	27	AC_INIT(c++tools)
	28
	29	AC_CONFIG_SRCDIR([server.cc])
	30
	31	# Determine the noncanonical names used for directories.
	32	ACX_NONCANONICAL_TARGET
	33
	34	AC_CANONICAL_SYSTEM
	35	AC_PROG_INSTALL
3f78c8cb NS	36	test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}'
3f78c8cb NS	37	AC_SUBST(INSTALL_PROGRAM)
35fc243f NS	38
	39	AC_PROG_CXX
	40	MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
	41	AC_CHECK_PROGS([AUTOCONF], [autoconf], [$MISSING autoconf])
	42	AC_CHECK_PROGS([AUTOHEADER], [autoheader], [$MISSING autoheader])
	43
e4d306cf IS	44	AC_LANG(C++)
e4d306cf IS	45
35fc243f NS	46	dnl Enabled by default
	47	AC_MSG_CHECKING([whether to build C++ tools])
	48	AC_ARG_ENABLE(c++-tools,
	49	[AS_HELP_STRING([--enable-c++-tools],
	50	[build auxiliary c++ tools])],
	51	cxx_aux_tools=$enableval,
	52	cxx_aux_tools=yes)
	53
	54	AC_MSG_RESULT($cxx_aux_tools)
	55	CXX_AUX_TOOLS="$cxx_aux_tools"
	56	AC_SUBST(CXX_AUX_TOOLS)
	57
	58	AC_ARG_ENABLE([maintainer-mode],
	59	AS_HELP_STRING([--enable-maintainer-mode],
	60	[enable maintainer mode. Add rules to rebuild configurey bits]),,
	61	[enable_maintainer_mode=no])
	62	case "$enable_maintainer_mode" in
4b1987f8 EB	63	yes) maintainer_mode=yes ;;
	64	no) maintainer_mode=no ;;
	65	*) AC_MSG_ERROR([unknown maintainer mode $enable_maintainer_mode]) ;;
35fc243f NS	66	esac
	67	AC_MSG_CHECKING([maintainer-mode])
	68	AC_MSG_RESULT([$maintainer_mode])
	69	test "$maintainer_mode" = yes && MAINTAINER=yes
	70	AC_SUBST(MAINTAINER)
	71
e4d306cf IS	72	# Handle configuration of checking; for the tools in this directory we
	73	# default to release checking and stricter checks do not change this.
	74
	75	AC_ARG_ENABLE(checking,
	76	[AS_HELP_STRING([[--enable-checking[=LIST]]],
	77	[enable expensive run-time checks. With LIST,
	78	enable only specific categories of checks.
	79	Categories are: yes,no,all,none,release.])],
	80	[ac_checking_flags="${enableval}"],[
	81	# Default to checking.
	82	ac_checking_flags=yes
	83	])
	84	IFS="${IFS= }"; ac_save_IFS="$IFS"; IFS="$IFS,"
	85	for check in release $ac_checking_flags
	86	do
	87	case $check in
	88	# these set all the flags to specific states
	89	yes\|all\|release\|assert) ac_assert_checking=1 ; ;;
	90	no\|none) ac_assert_checking= ; ;;
	91	*) ;;
	92	esac
	93	done
	94	IFS="$ac_save_IFS"
	95
	96	if test x$ac_assert_checking != x ; then
	97	AC_DEFINE(ENABLE_ASSERT_CHECKING, 1,
	98	[Define if you want assertions enabled. This is a cheap check.])
	99	fi
	100
544f4775 NS	101	# Check whether --enable-default-pie was given.
	102	AC_ARG_ENABLE(default-pie,
	103	[AS_HELP_STRING([--enable-default-pie],
	104	[enable Position Independent Executable as default])],
251c72a6 MP	105	[PICFLAG=-fPIE], [PICFLAG=])
	106
	107	# Enable --enable-host-pie
	108	AC_ARG_ENABLE(host-pie,
	109	[AS_HELP_STRING([--enable-host-pie],
	110	[build host code as PIE])],
	111	[PICFLAG=-fPIE; LD_PICFLAG=-pie], [])
	112	AC_SUBST(PICFLAG)
	113	AC_SUBST(LD_PICFLAG)
544f4775	114
35fc243f NS	115	# Check if O_CLOEXEC is defined by fcntl
	116	AC_CACHE_CHECK(for O_CLOEXEC, ac_cv_o_cloexec, [
	117	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
	118	#include <fcntl.h>]], [[
	119	return open ("/dev/null", O_RDONLY \| O_CLOEXEC);]])],
	120	[ac_cv_o_cloexec=yes],[ac_cv_o_cloexec=no])])
	121	if test $ac_cv_o_cloexec = yes; then
	122	AC_DEFINE(HOST_HAS_O_CLOEXEC, 1,
	123	[Define if O_CLOEXEC supported by fcntl.])
	124	fi
	125
09616422 NS	126	AC_CHECK_HEADERS(sys/mman.h)
09616422 NS	127
35fc243f NS	128	# C++ Modules would like some networking features to provide the mapping
	129	# server. You can still use modules without them though.
	130	# The following network-related checks could probably do with some
	131	# Windows and other non-linux defenses and checking.
	132
	133	# Local socket connectivity wants AF_UNIX networking
	134	# Check for AF_UNIX networking
	135	AC_CACHE_CHECK(for AF_UNIX, ac_cv_af_unix, [
	136	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
	137	#include <sys/types.h>
	138	#include <sys/socket.h>
	139	#include <sys/un.h>
	140	#include <netinet/in.h>]],[[
	141	sockaddr_un un;
	142	un.sun_family = AF_UNSPEC;
	143	int fd = socket (AF_UNIX, SOCK_STREAM, 0);
	144	connect (fd, (sockaddr *)&un, sizeof (un));]])],
	145	[ac_cv_af_unix=yes],
	146	[ac_cv_af_unix=no])])
	147	if test $ac_cv_af_unix = yes; then
	148	AC_DEFINE(HAVE_AF_UNIX, 1,
	149	[Define if AF_UNIX supported.])
	150	fi
	151
	152	# Remote socket connectivity wants AF_INET6 networking
	153	# Check for AF_INET6 networking
	154	AC_CACHE_CHECK(for AF_INET6, ac_cv_af_inet6, [
	155	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
	156	#include <sys/types.h>
	157	#include <sys/socket.h>
	158	#include <netinet/in.h>
	159	#include <netdb.h>]],[[
	160	sockaddr_in6 in6;
	161	in6.sin6_family = AF_UNSPEC;
	162	struct addrinfo *addrs = 0;
	163	struct addrinfo hints;
	164	hints.ai_flags = 0;
	165	hints.ai_family = AF_INET6;
	166	hints.ai_socktype = SOCK_STREAM;
	167	hints.ai_protocol = 0;
	168	hints.ai_canonname = 0;
	169	hints.ai_addr = 0;
	170	hints.ai_next = 0;
	171	int e = getaddrinfo ("localhost", 0, &hints, &addrs);
	172	const char *str = gai_strerror (e);
	173	freeaddrinfo (addrs);
	174	int fd = socket (AF_INET6, SOCK_STREAM, 0);
	175	connect (fd, (sockaddr *)&in6, sizeof (in6));]])],
	176	[ac_cv_af_inet6=yes],
	177	[ac_cv_af_inet6=no])])
	178	if test $ac_cv_af_inet6 = yes; then
	179	AC_DEFINE(HAVE_AF_INET6, 1,
	180	[Define if AF_INET6 supported.])
	181	fi
	182
	183	# Efficient server response wants epoll
	184	# Check for epoll_create, epoll_ctl, epoll_pwait
	185	AC_CACHE_CHECK(for epoll, ac_cv_epoll, [
	186	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
	187	#include <sys/epoll.h>]],[[
	188	int fd = epoll_create (1);
	189	epoll_event ev;
	190	ev.events = EPOLLIN;
	191	ev.data.fd = 0;
192	epoll_ctl (fd, EPOLL_CTL_ADD, 0, &ev);
193	epoll_pwait (fd, 0, 0, -1, 0);]])],
194	[ac_cv_epoll=yes],
195	[ac_cv_epoll=no])])
196	if test $ac_cv_epoll = yes; then
197	AC_DEFINE(HAVE_EPOLL, 1,
198	[Define if epoll_create, epoll_ctl, epoll_pwait provided.])
199	fi
200
201	# If we can't use epoll, try pselect.
202	# Check for pselect
203	AC_CACHE_CHECK(for pselect, ac_cv_pselect, [
204	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
205	#include <sys/select.h>]],[[
206	pselect (0, 0, 0, 0, 0, 0);]])],
207	[ac_cv_pselect=yes],
208	[ac_cv_pselect=no])])
209	if test $ac_cv_pselect = yes; then
210	AC_DEFINE(HAVE_PSELECT, 1,
211	[Define if pselect provided.])
212	fi
213
214	# And failing that, use good old select.
215	# If we can't even use this, the server is serialized.
216	# Check for select
217	AC_CACHE_CHECK(for select, ac_cv_select, [
218	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
219	#include <sys/select.h>]],[[
220	select (0, 0, 0, 0, 0);]])],
221	[ac_cv_select=yes],
222	[ac_cv_select=no])])
223	if test $ac_cv_select = yes; then
224	AC_DEFINE(HAVE_SELECT, 1,
225	[Define if select provided.])
226	fi
227
228	# Avoid some fnctl calls by using accept4, when available.
229	# Check for accept4
230	AC_CACHE_CHECK(for accept4, ac_cv_accept4, [
231	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
232	#include <sys/socket.h>]],[[
233	int err = accept4 (1, 0, 0, SOCK_NONBLOCK);]])],
234	[ac_cv_accept4=yes],
235	[ac_cv_accept4=no])])
236	if test $ac_cv_accept4 = yes; then
237	AC_DEFINE(HAVE_ACCEPT4, 1,
238	[Define if accept4 provided.])
239	fi
240
241	# For better server messages, look for a way to stringize network addresses
242	# Check for inet_ntop
243	AC_CACHE_CHECK(for inet_ntop, ac_cv_inet_ntop, [
244	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
245	#include <arpa/inet.h>
246	#include <netinet/in.h>]],[[
247	sockaddr_in6 in6;
248	char buf[INET6_ADDRSTRLEN];
249	const char *str = inet_ntop (AF_INET6, &in6, buf, sizeof (buf));]])],
250	[ac_cv_inet_ntop=yes],
251	[ac_cv_inet_ntop=no])])
252	if test $ac_cv_inet_ntop = yes; then
253	AC_DEFINE(HAVE_INET_NTOP, 1,
254	[Define if inet_ntop provided.])
255	fi
256
4e7e7c13 JJ	257	# Determine what GCC version number to use in filesystem paths.
	258	GCC_BASE_VER
	259
a20893cf RO	260	# Solaris needs libsocket and libnsl for socket functions before 11.4.
	261	# libcody uses those.
	262	save_LIBS="$LIBS"
	263	LIBS=
	264	AX_LIB_SOCKET_NSL
	265	NETLIBS="$LIBS"
	266	LIBS="$save_LIBS"
	267	AC_SUBST(NETLIBS)
	268
35fc243f NS	269	AC_CONFIG_HEADERS([config.h])
	270	AC_CONFIG_FILES([Makefile])
	271
	272	AC_OUTPUT