e4d306cf70
The c++tools configure fragments need to be built with a C++ compiler. In addition, the stand-alone server uses diagnostic mechanisms in common with GCC, but needs to define implementations for gcc_assert and supporting output functions. Signed-off-by: Iain Sandoe <iain@sandoe.co.uk> PR c++/98821 - modules : c++tools configures with CC but code fragments assume CXX. PR c++/98821 c++tools/ChangeLog: * config.h.in: Regenerate. * configure: Regenerate. * configure.ac: Configure using C++. Pull logic to detect enabled checking modes; default to release checking. * server.cc (AI_NUMERICSERV): Define a fallback value. (gcc_assert): New. (gcc_unreachable): New. (fancy_abort): Only build when checking is enabled. Co-authored-by: Jakub Jelinek <jakub@redhat.com>
266 lines
7.9 KiB
Plaintext
266 lines
7.9 KiB
Plaintext
# Configure script for c++tools
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# Copyright (C) 2020-2021 Free Software Foundation, Inc.
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# Written by Nathan Sidwell <nathan@acm.org> while at FaceBook
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#
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# This file is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; see the file COPYING3. If not see
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# <http://www.gnu.org/licenses/>.
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# C++ has grown a C++20 mapper server. This may be used to provide
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# and/or learn and/or build required modules. This sample server
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# shows how the protocol introduced by wg21.link/p1184 may be used.
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# By default g++ uses an in-process mapper.
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sinclude(../config/acx.m4)
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sinclude(../config/ax_lib_socket_nsl.m4)
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AC_INIT(c++tools)
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AC_CONFIG_SRCDIR([server.cc])
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# Determine the noncanonical names used for directories.
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ACX_NONCANONICAL_TARGET
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AC_CANONICAL_SYSTEM
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AC_PROG_INSTALL
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test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}'
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AC_SUBST(INSTALL_PROGRAM)
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AC_PROG_CXX
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MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
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AC_CHECK_PROGS([AUTOCONF], [autoconf], [$MISSING autoconf])
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AC_CHECK_PROGS([AUTOHEADER], [autoheader], [$MISSING autoheader])
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AC_LANG(C++)
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dnl Enabled by default
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AC_MSG_CHECKING([whether to build C++ tools])
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AC_ARG_ENABLE(c++-tools,
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[AS_HELP_STRING([--enable-c++-tools],
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[build auxiliary c++ tools])],
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cxx_aux_tools=$enableval,
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cxx_aux_tools=yes)
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AC_MSG_RESULT($cxx_aux_tools)
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CXX_AUX_TOOLS="$cxx_aux_tools"
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AC_SUBST(CXX_AUX_TOOLS)
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AC_ARG_ENABLE([maintainer-mode],
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AS_HELP_STRING([--enable-maintainer-mode],
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[enable maintainer mode. Add rules to rebuild configurey bits]),,
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[enable_maintainer_mode=no])
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case "$enable_maintainer_mode" in
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yes) maintainer_mode=yes ;;
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no) maintainer_mode=no ;;
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*) AC_MSG_ERROR([unknown maintainer mode $enable_maintainer_mode]) ;;
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esac
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AC_MSG_CHECKING([maintainer-mode])
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AC_MSG_RESULT([$maintainer_mode])
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test "$maintainer_mode" = yes && MAINTAINER=yes
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AC_SUBST(MAINTAINER)
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# Handle configuration of checking; for the tools in this directory we
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# default to release checking and stricter checks do not change this.
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AC_ARG_ENABLE(checking,
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[AS_HELP_STRING([[--enable-checking[=LIST]]],
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[enable expensive run-time checks. With LIST,
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enable only specific categories of checks.
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Categories are: yes,no,all,none,release.])],
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[ac_checking_flags="${enableval}"],[
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# Default to checking.
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ac_checking_flags=yes
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])
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IFS="${IFS= }"; ac_save_IFS="$IFS"; IFS="$IFS,"
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for check in release $ac_checking_flags
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do
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case $check in
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# these set all the flags to specific states
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yes|all|release|assert) ac_assert_checking=1 ; ;;
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no|none) ac_assert_checking= ; ;;
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*) ;;
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esac
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done
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IFS="$ac_save_IFS"
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if test x$ac_assert_checking != x ; then
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AC_DEFINE(ENABLE_ASSERT_CHECKING, 1,
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[Define if you want assertions enabled. This is a cheap check.])
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fi
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# Check whether --enable-default-pie was given.
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AC_ARG_ENABLE(default-pie,
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[AS_HELP_STRING([--enable-default-pie],
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[enable Position Independent Executable as default])],
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[PIEFLAG=-fPIE], [PIEFLAG=])
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AC_SUBST([PIEFLAG])
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# Check if O_CLOEXEC is defined by fcntl
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AC_CACHE_CHECK(for O_CLOEXEC, ac_cv_o_cloexec, [
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
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#include <fcntl.h>]], [[
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return open ("/dev/null", O_RDONLY | O_CLOEXEC);]])],
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[ac_cv_o_cloexec=yes],[ac_cv_o_cloexec=no])])
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if test $ac_cv_o_cloexec = yes; then
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AC_DEFINE(HOST_HAS_O_CLOEXEC, 1,
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[Define if O_CLOEXEC supported by fcntl.])
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fi
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AC_CHECK_HEADERS(sys/mman.h)
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# C++ Modules would like some networking features to provide the mapping
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# server. You can still use modules without them though.
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# The following network-related checks could probably do with some
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# Windows and other non-linux defenses and checking.
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# Local socket connectivity wants AF_UNIX networking
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# Check for AF_UNIX networking
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AC_CACHE_CHECK(for AF_UNIX, ac_cv_af_unix, [
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <netinet/in.h>]],[[
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sockaddr_un un;
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un.sun_family = AF_UNSPEC;
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int fd = socket (AF_UNIX, SOCK_STREAM, 0);
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connect (fd, (sockaddr *)&un, sizeof (un));]])],
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[ac_cv_af_unix=yes],
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[ac_cv_af_unix=no])])
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if test $ac_cv_af_unix = yes; then
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AC_DEFINE(HAVE_AF_UNIX, 1,
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[Define if AF_UNIX supported.])
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fi
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# Remote socket connectivity wants AF_INET6 networking
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# Check for AF_INET6 networking
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AC_CACHE_CHECK(for AF_INET6, ac_cv_af_inet6, [
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netdb.h>]],[[
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sockaddr_in6 in6;
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in6.sin6_family = AF_UNSPEC;
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struct addrinfo *addrs = 0;
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struct addrinfo hints;
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hints.ai_flags = 0;
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hints.ai_family = AF_INET6;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_protocol = 0;
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hints.ai_canonname = 0;
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hints.ai_addr = 0;
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hints.ai_next = 0;
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int e = getaddrinfo ("localhost", 0, &hints, &addrs);
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const char *str = gai_strerror (e);
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freeaddrinfo (addrs);
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int fd = socket (AF_INET6, SOCK_STREAM, 0);
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connect (fd, (sockaddr *)&in6, sizeof (in6));]])],
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[ac_cv_af_inet6=yes],
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[ac_cv_af_inet6=no])])
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if test $ac_cv_af_inet6 = yes; then
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AC_DEFINE(HAVE_AF_INET6, 1,
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[Define if AF_INET6 supported.])
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fi
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# Efficient server response wants epoll
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# Check for epoll_create, epoll_ctl, epoll_pwait
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AC_CACHE_CHECK(for epoll, ac_cv_epoll, [
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
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#include <sys/epoll.h>]],[[
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int fd = epoll_create (1);
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epoll_event ev;
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ev.events = EPOLLIN;
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ev.data.fd = 0;
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epoll_ctl (fd, EPOLL_CTL_ADD, 0, &ev);
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epoll_pwait (fd, 0, 0, -1, 0);]])],
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[ac_cv_epoll=yes],
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[ac_cv_epoll=no])])
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if test $ac_cv_epoll = yes; then
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AC_DEFINE(HAVE_EPOLL, 1,
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[Define if epoll_create, epoll_ctl, epoll_pwait provided.])
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fi
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# If we can't use epoll, try pselect.
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# Check for pselect
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AC_CACHE_CHECK(for pselect, ac_cv_pselect, [
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
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#include <sys/select.h>]],[[
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pselect (0, 0, 0, 0, 0, 0);]])],
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[ac_cv_pselect=yes],
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[ac_cv_pselect=no])])
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if test $ac_cv_pselect = yes; then
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AC_DEFINE(HAVE_PSELECT, 1,
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[Define if pselect provided.])
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fi
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# And failing that, use good old select.
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# If we can't even use this, the server is serialized.
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# Check for select
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AC_CACHE_CHECK(for select, ac_cv_select, [
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
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#include <sys/select.h>]],[[
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select (0, 0, 0, 0, 0);]])],
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[ac_cv_select=yes],
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[ac_cv_select=no])])
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if test $ac_cv_select = yes; then
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AC_DEFINE(HAVE_SELECT, 1,
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[Define if select provided.])
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fi
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# Avoid some fnctl calls by using accept4, when available.
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# Check for accept4
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AC_CACHE_CHECK(for accept4, ac_cv_accept4, [
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
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#include <sys/socket.h>]],[[
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int err = accept4 (1, 0, 0, SOCK_NONBLOCK);]])],
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[ac_cv_accept4=yes],
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[ac_cv_accept4=no])])
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if test $ac_cv_accept4 = yes; then
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AC_DEFINE(HAVE_ACCEPT4, 1,
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[Define if accept4 provided.])
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fi
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# For better server messages, look for a way to stringize network addresses
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# Check for inet_ntop
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AC_CACHE_CHECK(for inet_ntop, ac_cv_inet_ntop, [
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
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#include <arpa/inet.h>
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#include <netinet/in.h>]],[[
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sockaddr_in6 in6;
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char buf[INET6_ADDRSTRLEN];
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const char *str = inet_ntop (AF_INET6, &in6, buf, sizeof (buf));]])],
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[ac_cv_inet_ntop=yes],
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[ac_cv_inet_ntop=no])])
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if test $ac_cv_inet_ntop = yes; then
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AC_DEFINE(HAVE_INET_NTOP, 1,
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[Define if inet_ntop provided.])
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fi
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# Determine what GCC version number to use in filesystem paths.
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GCC_BASE_VER
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# Solaris needs libsocket and libnsl for socket functions before 11.4.
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# libcody uses those.
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save_LIBS="$LIBS"
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LIBS=
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AX_LIB_SOCKET_NSL
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NETLIBS="$LIBS"
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LIBS="$save_LIBS"
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AC_SUBST(NETLIBS)
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AC_CONFIG_HEADERS([config.h])
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AC_CONFIG_FILES([Makefile])
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AC_OUTPUT
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