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libzmq/configure.ac
Pieter Hintjens b4ed3f5506 Problem: API violations are treated as recoverable errors 
The example is applications passing invalid arguments to a socket option
and then failing to check the return code. The results can be very hard
to diagnose. Here are some threads that show the pain this causes:

* https://github.com/zeromq/zyre/issues/179
* http://lists.zeromq.org/pipermail/zeromq-dev/2014-June/026388.html

One common argument is that a library should never assert, and should
pass errors back to the calling application. The counter argument is
that when an application is broken enough to pass garbage to libzmq,
it cannot be trusted to handle the resulting errors properly. Empirical
evidence from CZMQ, where we systematically assert on bad arguments, is
that this militant approach makes applications more, not less, robust.

I don't see any valid use cases for returning errors on bad arguments,
with one exception: zmq_setsockopt can be used to probe whether libzmq
was e.g. built with CURVE security. I'd argue that it's nasty to use a
side effect like this. If apps need to probe how libzmq was built, this
should be done explicitly, and for ALL build options, not just CURVE.

There are/were no libzmq test cases that check the return code for an
invalid option.

For now I've enabled militant assertions using --with-militant at
configure time. However I'd like to make this the default setting.
2014-06-17 16:00:55 +02:00

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# -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.
AC_PREREQ(2.61)
#
# The 0MQ version number is extracted from include/zmq.h using
# the version.sh script. Hence, it should be updated there.
# The version in git should reflect the *next* version planned.
#
AC_INIT([zeromq],[m4_esyscmd([./version.sh])],[zeromq-dev@lists.zeromq.org])
AC_CONFIG_AUX_DIR(config)
AC_CONFIG_MACRO_DIR(config)
AC_CONFIG_HEADERS([src/platform.hpp])
AM_INIT_AUTOMAKE(tar-ustar dist-zip foreign)
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
# This lets us use PACKAGE_VERSION in Makefiles
AC_SUBST(PACKAGE_VERSION)
# Libtool -version-info (ABI version)
#
# Don't change this unless you know exactly what you're doing and have read and
# understand:
# http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
#
# Changes:
#
# ZeroMQ versions prior to 2.1.0 use 0:0:0 (undefined)
# ZeroMQ versions 2.1.x: 1:0:0 (ABI version 1)
# ZeroMQ version 3.0: 2:0:0 (ABI version 2)
# ZeroMQ version 3.1: 3:0:0 (ABI version 3)
# ZeroMQ version 4.0: 4:0:0 (ABI version 4)
#
# libzmq -version-info current:revision:age
LTVER="4:0:0"
AC_SUBST(LTVER)
# Take a copy of original flags
ZMQ_ORIG_CFLAGS="${CFLAGS:-none}"
ZMQ_ORIG_CPPFLAGS="${CPPFLAGS:-none}"
ZMQ_ORIG_CXXFLAGS="${CXXFLAGS:-none}"
# Checks for programs.
AC_PROG_CC
AC_PROG_CC_C99
AC_PROG_CXX
AM_PROG_CC_C_O
AC_PROG_SED
AC_PROG_AWK
# Libtool configuration for different targets. See acinclude.m4
AC_ARG_VAR([XMLTO], [Path to xmlto command])
AC_PATH_PROG([XMLTO], [xmlto])
AC_ARG_VAR([ASCIIDOC], [Path to asciidoc command])
AC_PATH_PROG([ASCIIDOC], [asciidoc])
LIBZMQ_CONFIG_LIBTOOL
AC_LIBTOOL_WIN32_DLL
AC_PROG_LIBTOOL
# Check whether to build a with debug symbols
LIBZMQ_CHECK_ENABLE_DEBUG
# Check wheter to enable code coverage
LIBZMQ_WITH_GCOV
AC_MSG_CHECKING([if TIPC is available and supports nonblocking connect])
AC_RUN_IFELSE([AC_LANG_PROGRAM([[ #include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/socket.h>
#include <linux/tipc.h>
]],[[
struct sockaddr_tipc topsrv;
int sd = socket(AF_TIPC, SOCK_SEQPACKET, 0);
if (sd == -EAFNOSUPPORT) {
return 1;
}
memset(&topsrv, 0, sizeof(topsrv));
topsrv.family = AF_TIPC;
topsrv.addrtype = TIPC_ADDR_NAME;
topsrv.addr.name.name.type = TIPC_TOP_SRV;
topsrv.addr.name.name.instance = TIPC_TOP_SRV;
fcntl(sd, F_SETFL, O_NONBLOCK);
if (connect(sd, (struct sockaddr *)&topsrv,
sizeof(topsrv)) != 0) {
if (errno != EINPROGRESS)
return -1;
}]])
],
[libzmq_tipc_support=yes],
[libzmq_tipc_support=no],
[libzmq_tipc_support=no])
AC_MSG_RESULT([$libzmq_tipc_support])
# Allow libsodium to be installed in a custom path:
AC_ARG_WITH([libsodium],
[AS_HELP_STRING([--with-libsodium],
[Specify libsodium prefix])],
[zmq_search_libsodium="yes"],
[])
if test "x$zmq_search_libsodium" = "xyes"; then
if test -r "${with_libsodium}/include/sodium.h"; then
CPPFLAGS="-I${with_libsodium}/include ${CPPFLAGS}"
LDFLAGS="-L${with_libsodium}/lib ${LDFLAGS}"
fi
fi
AC_ARG_WITH([libsodium-include-dir],
[AS_HELP_STRING([--with-libsodium-include-dir],
[Specify libsodium include prefix])],
[zmq_search_libsodium_include="yes"],
[])
if test "x$zmq_search_libsodium_include" = "xyes"; then
if test -r "${with_libsodium_include_dir}/sodium.h"; then
CPPFLAGS="-I${with_libsodium_include_dir}/include ${CPPFLAGS}"
fi
fi
AC_ARG_WITH([libsodium_lib_dir],
[AS_HELP_STRING([--with-libsodium-lib-dir],
[Specify libsodium library prefix])],
[zmq_search_libsodium_lib="yes"],
[])
if test "x$zmq_search_libsodium_lib" = "xyes"; then
if test -r "${with_libsodium_lib_dir}/libsodium.{a|so|dylib}"; then
LDFLAGS="-L${with_libsodium}/lib ${LDFLAGS}"
fi
fi
AC_ARG_WITH([relaxed],
[AS_HELP_STRING([--with-relaxed],
[Switch off pedantic compiler])],
[zmq_relaxed="yes"],
[])
if test "x$zmq_relaxed" = "xyes"; then
libzmq_pedantic="no"
else
libzmq_pedantic="yes"
fi
AC_ARG_WITH([militant],
[AS_HELP_STRING([--with-militant],
[Enable militant API assertions])],
[zmq_militant="yes"],
[])
if test "x$zmq_militant" = "xyes"; then
AC_DEFINE(ZMQ_ACT_MILITANT, 1, [Enable militant API assertions])
fi
# By default compiling with -Werror except OSX.
libzmq_werror="yes"
# By default use DSO visibility
libzmq_dso_visibility="yes"
# Platform specific checks
libzmq_on_mingw32="no"
libzmq_on_android="no"
libzmq_on_linux="no"
# Set some default features required by 0MQ code.
CPPFLAGS="-D_REENTRANT -D_THREAD_SAFE $CPPFLAGS"
# For host type checks
AC_CANONICAL_HOST
# OS-specific tests
case "${host_os}" in
*linux*)
# Define on Linux to enable all library features. Define if using a gnu compiler
if test "x$GXX" = "xyes"; then
CPPFLAGS="-D_GNU_SOURCE $CPPFLAGS"
fi
AC_DEFINE(ZMQ_HAVE_LINUX, 1, [Have Linux OS])
libzmq_on_linux="yes"
if test "x$libzmq_tipc_support" = "xyes"; then
AC_DEFINE(ZMQ_HAVE_TIPC, 1, [Have TIPC support])
fi
case "${host_os}" in
*android*)
AC_DEFINE(ZMQ_HAVE_ANDROID, 1, [Have Android OS])
libzmq_on_android="yes"
;;
esac
;;
*solaris*)
# Define on Solaris to enable all library features
CPPFLAGS="-D_PTHREADS $CPPFLAGS"
AC_DEFINE(ZMQ_HAVE_SOLARIS, 1, [Have Solaris OS])
AC_CHECK_LIB(socket, socket)
AC_CHECK_LIB(nsl, gethostbyname)
AC_MSG_CHECKING([whether atomic operations can be used])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
[[#include <atomic.h>]],
[[uint32_t value;
atomic_cas_32 (&value, 0, 0);
return 0;]])],
[solaris_has_atomic=yes],
[solaris_has_atomic=no])
AC_MSG_RESULT([$solaris_has_atomic])
# Solaris 8 does not have atomic operations exported to user space.
if test "x$solaris_has_atomic" = "xno"; then
AC_DEFINE(ZMQ_FORCE_MUTEXES, 1, [Force to use mutexes])
fi
# ssp library is required for libsodium on Solaris-like systems
LDFLAGS="-lssp $LDFLAGS"
CPPFLAGS="$CPPFLAGS -Wno-long-long"
;;
*freebsd*)
# Define on FreeBSD to enable all library features
CPPFLAGS="-D__BSD_VISIBLE $CPPFLAGS"
AC_DEFINE(ZMQ_HAVE_FREEBSD, 1, [Have FreeBSD OS])
;;
*darwin*)
# Define on Darwin to enable all library features
CPPFLAGS="-D_DARWIN_C_SOURCE $CPPFLAGS"
libzmq_pedantic="no"
libzmq_werror="no"
AC_DEFINE(ZMQ_HAVE_OSX, 1, [Have DarwinOSX OS])
AC_LANG_PUSH([C++])
LIBZMQ_CHECK_LANG_FLAG_PREPEND([-Wno-uninitialized])
AC_LANG_POP([C++])
;;
*netbsd*)
# Define on NetBSD to enable all library features
CPPFLAGS="-D_NETBSD_SOURCE $CPPFLAGS"
AC_DEFINE(ZMQ_HAVE_NETBSD, 1, [Have NetBSD OS])
# NetBSD 5.0 and newer provides atomic operations but we can
# only use these on systems where PR #42842 has been fixed so
# we must try and link a test program using C++.
libzmq_netbsd_has_atomic=no
AC_MSG_CHECKING([whether atomic operations can be used])
AC_LANG_PUSH([C++])
AC_LINK_IFELSE([AC_LANG_PROGRAM(
[[#include <atomic.h>]],
[[uint32_t value;
atomic_cas_32 (&value, 0, 0);
return 0;]])],
[libzmq_netbsd_has_atomic=yes],
[libzmq_netbsd_has_atomic=no])
AC_LANG_POP([C++])
AC_MSG_RESULT([$libzmq_netbsd_has_atomic])
if test "x$libzmq_netbsd_has_atomic" = "xno"; then
AC_DEFINE(ZMQ_FORCE_MUTEXES, 1, [Force to use mutexes])
fi
;;
*openbsd*)
# Define on OpenBSD to enable all library features
CPPFLAGS="-D_BSD_SOURCE $CPPFLAGS"
AC_DEFINE(ZMQ_HAVE_OPENBSD, 1, [Have OpenBSD OS])
;;
*nto-qnx*)
libzmq_pedantic="no"
AC_DEFINE(ZMQ_HAVE_QNXNTO, 1, [Have QNX Neutrino OS])
AC_CHECK_LIB(socket, socket)
;;
*aix*)
AC_DEFINE(ZMQ_HAVE_AIX, 1, [Have AIX OS])
;;
*hpux*)
# Define on HP-UX to enable all library features
CPPFLAGS="-D_POSIX_C_SOURCE=200112L $CPPFLAGS"
AC_DEFINE(ZMQ_HAVE_HPUX, 1, [Have HPUX OS])
LIBZMQ_CHECK_LANG_FLAG_PREPEND([-Ae])
AC_CHECK_FUNCS(gethrtime)
;;
*mingw32*)
AC_DEFINE(ZMQ_HAVE_WINDOWS, 1, [Have Windows OS])
AC_DEFINE(ZMQ_HAVE_MINGW32, 1, [Have MinGW32])
AC_CHECK_HEADERS(windows.h)
AC_CHECK_LIB(ws2_32, main, ,
[AC_MSG_ERROR([cannot link with ws2_32.dll.])])
AC_CHECK_LIB(rpcrt4, main, ,
[AC_MSG_ERROR([cannot link with rpcrt4.dll.])])
AC_CHECK_LIB(iphlpapi, main, ,
[AC_MSG_ERROR([cannot link with iphlpapi.dll.])])
# mingw32 defines __int64_t as long long
AC_LANG_PUSH([C++])
LIBZMQ_CHECK_LANG_FLAG_PREPEND([-Wno-long-long])
AC_LANG_POP([C++])
libzmq_on_mingw32="yes"
libzmq_dso_visibility="no"
if test "x$enable_static" = "xyes"; then
AC_MSG_ERROR([Building static libraries is not supported under MinGW32])
fi
;;
*cygwin*)
# Define on Cygwin to enable all library features
CPPFLAGS="-D_GNU_SOURCE $CPPFLAGS"
AC_DEFINE(ZMQ_HAVE_CYGWIN, 1, [Have Cygwin])
if test "x$enable_static" = "xyes"; then
AC_MSG_ERROR([Building static libraries is not supported under Cygwin])
fi
;;
*)
AC_MSG_ERROR([unsupported system: ${host_os}.])
;;
esac
# Checks for libraries
AC_CHECK_LIB([pthread], [pthread_create])
AC_CHECK_LIB([rt], [clock_gettime])
if test "x$zmq_search_libsodium" = "xyes"; then
AC_CHECK_LIB([sodium], [sodium_init],,AC_MSG_ERROR(libsodium is not installed. Install it or don't pass --with-libsodium to configure script))
else
AC_CHECK_LIB([sodium], [sodium_init],,AC_MSG_WARN(libsodium is needed for CURVE security))
fi
AC_CHECK_LIB([gssapi_krb5], [gss_init_sec_context],,AC_MSG_WARN(libgssapi_krb5 is needed for GSSAPI security))
#
# Check if the compiler supports -fvisibility=hidden flag. MinGW32 uses __declspec
#
if test "x$libzmq_dso_visibility" = "xyes"; then
AC_LANG_PUSH([C++])
LIBZMQ_CHECK_LANG_VISIBILITY([LIBZMQ_EXTRA_CXXFLAGS="$libzmq_cv_[]_AC_LANG_ABBREV[]_visibility_flag ${LIBZMQ_EXTRA_CXXFLAGS}"])
AC_LANG_POP([C++])
fi
# CPU-specific optimizations
case "${host_cpu}" in
*sparc*)
AC_LANG_PUSH([C++])
LIBZMQ_CHECK_LANG_FLAG_PREPEND([-mcpu=v9])
AC_LANG_POP([C++])
;;
*)
;;
esac
# Check whether to build docs / install man pages
LIBZMQ_CHECK_DOC_BUILD
# Check polling system
LIBZMQ_CHECK_POLLER([CPPFLAGS="${CPPFLAGS} -D${libzmq_cv_poller_flag}"],
[AC_MSG_ERROR([Unable to continue without polling system])])
# Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS(errno.h arpa/inet.h netinet/tcp.h netinet/in.h stddef.h \
stdlib.h string.h sys/socket.h sys/time.h time.h unistd.h limits.h)
# Check if we have ifaddrs.h header file.
AC_CHECK_HEADERS(ifaddrs.h, [AC_DEFINE(ZMQ_HAVE_IFADDRS, 1, [Have ifaddrs.h header.])])
# Check if we have sys/uio.h header file.
AC_CHECK_HEADERS(sys/uio.h, [AC_DEFINE(ZMQ_HAVE_UIO, 1, [Have uio.h header.])])
# Force not to use eventfd
AC_ARG_ENABLE([eventfd], [AS_HELP_STRING([--disable-eventfd], [disable eventfd [default=no]])],
[zmq_disable_eventfd=yes], [zmq_disable_eventfd=no])
if test "x$zmq_disable_eventfd" != "xyes"; then
# Check if we have eventfd.h header file.
AC_CHECK_HEADERS(sys/eventfd.h,
[AC_DEFINE(ZMQ_HAVE_EVENTFD, 1, [Have eventfd extension.])])
fi
# Use c++ in subsequent tests
AC_LANG_PUSH(C++)
AC_CHECK_DECLS([SO_PEERCRED], [AC_DEFINE(ZMQ_HAVE_SO_PEERCRED, 1, [Have SO_PEERCRED socket option])], [], [#include <sys/socket.h>])
AC_CHECK_DECLS([LOCAL_PEERCRED], [AC_DEFINE(ZMQ_HAVE_LOCAL_PEERCRED, 1, [Have LOCAL_PEERCRED socket option])], [], [#include <sys/socket.h>])
AM_CONDITIONAL(HAVE_IPC_PEERCRED, test "x$ac_cv_have_decl_SO_PEERCRED" = "xyes" || test "x$ac_cv_have_decl_LOCAL_PEERCRED" = "xyes")
AC_HEADER_STDBOOL
AC_C_CONST
AC_C_INLINE
# Checks for typedefs, structures, and compiler characteristics.
if test "x$libzmq_cv_[]_AC_LANG_ABBREV[]_intel_compiler" = "xyes"; then
dnl 279: controlling expression is constant
dnl Fixes build with ICC 12.x
LIBZMQ_CHECK_WITH_FLAG([-wd279], [AC_TYPE_SIZE_T])
LIBZMQ_CHECK_WITH_FLAG([-wd279], [AC_TYPE_SSIZE_T])
else
AC_TYPE_SIZE_T
AC_TYPE_SSIZE_T
fi
AC_HEADER_TIME
AC_TYPE_UINT32_T
AC_C_VOLATILE
# PGM extension
libzmq_pgm_ext="no"
pgm_basename="libpgm-5.2.122~dfsg"
AC_ARG_WITH([pgm], [AS_HELP_STRING([--with-pgm],
[build libzmq with PGM extension [default=no]])],
[with_pgm_ext=$withval], [with_pgm_ext=no])
# build using system pgm
AC_ARG_WITH([system-pgm], [AS_HELP_STRING([--with-system-pgm],
[build libzmq with PGM extension. Requires pkg-config [default=no]])],
[with_system_pgm_ext=yes], [with_system_pgm_ext=no])
if test "x$with_pgm_ext" != "xno" -a "x$with_system_pgm_ext" != "xno"; then
AC_MSG_ERROR([--with-pgm and --with-system-pgm cannot be specified together])
fi
if test "x$with_pgm_ext" != "xno"; then
# This allows placing the tar.gz to foreign/openpgm
# and using ./configure --with-pgm=libpgm-x.y.z
if test "x$with_pgm_ext" != "xyes"; then
pgm_basename="$with_pgm_ext"
fi
# Unpack libpgm
AC_MSG_NOTICE([Unpacking ${pgm_basename}.tar.gz])
libzmq_pwd=`pwd`
cd foreign/openpgm
if ! (gzip -dc "${pgm_basename}.tar.gz" || echo "failed") | ${am__untar}; then
AC_MSG_ERROR([cannot unpack the foreign/openpgm/${pgm_basename}.tar.gz file])
fi
cd "${libzmq_pwd}"
if test -d foreign/openpgm/build-staging; then
rm -rf foreign/openpgm/build-staging
fi
mv foreign/openpgm/${pgm_basename} foreign/openpgm/build-staging
pgm_srcdir=foreign/openpgm/build-staging/openpgm/pgm
if ! test -d foreign/openpgm/build-staging/openpgm/pgm/config; then
mkdir foreign/openpgm/build-staging/openpgm/pgm/config
fi
# DSO symbol visibility for openpgm
AC_LANG_PUSH([C])
LIBZMQ_CHECK_LANG_VISIBILITY([ac_configure_args="CFLAGS='$libzmq_cv_[]_AC_LANG_ABBREV[]_visibility_flag' ${ac_configure_args}"])
AC_LANG_POP([C])
pgm_subdir=build-staging/openpgm/pgm
AC_SUBST(pgm_subdir)
AC_SUBST(pgm_srcdir)
AC_CONFIG_SUBDIRS([foreign/openpgm/build-staging/openpgm/pgm/])
# Success!
AC_DEFINE(ZMQ_HAVE_OPENPGM, 1, [Have OpenPGM extension])
libzmq_pgm_ext="yes"
fi
# Build with system openpgm
if test "x$with_system_pgm_ext" != "xno"; then
m4_ifdef([PKG_CHECK_MODULES], [
have_pgm_system_library="no"
PKG_CHECK_MODULES([OpenPGM], [openpgm-5.2 >= 5.2],
[ have_pgm_system_library="yes" ],
[PKG_CHECK_MODULES([OpenPGM], [openpgm-5.1 >= 5.1],
[ have_pgm_system_library="yes" ])
]
)
if test "x$have_pgm_system_library" = "xyes"; then
AC_DEFINE(ZMQ_HAVE_OPENPGM, 1, [Have OpenPGM extension])
LIBZMQ_EXTRA_CXXFLAGS="$OpenPGM_CFLAGS $LIBZMQ_EXTRA_CXXFLAGS"
LIBS="$OpenPGM_LIBS $LIBS"
fi
],
[AC_MSG_ERROR([--with-system-pgm requires a working pkg-config installation])])
fi
AC_SUBST(pgm_basename)
# This uses "--with-norm" to point to the "norm" directory
# for "norm/include" and "norm/lib"
#(if "--with-norm=yes" is given, then assume installed on system)
AC_ARG_WITH([norm], [AS_HELP_STRING([--with-norm],
[build libzmq with NORM protocol extension, optionally specifying norm path [default=no]])],
[with_norm_ext=$withval], [with_norm_ext=no])
AC_MSG_CHECKING("with_norm_ext = ${with_norm_ext}")
if test "x$with_norm_ext" != "xno"; then
AC_DEFINE(ZMQ_HAVE_NORM, 1, [Have NORM protocol extension])
if test "x$wwith_norm_ext" != "xyes"; then
norm_path="${with_norm_ext}"
LIBZMQ_EXTRA_CXXFLAGS="-I${norm_path}/include ${LIBZMQ_EXTRA_CXXFLAGS}"
LIBZMQ_EXTRA_LDFLAGS="-I${norm_path}/include ${LIBZMQ_EXTRA_LDFLAGS}"
fi
LIBS="-lnorm $LIBS"
fi
# Set -Wall, -Werror and -pedantic
AC_LANG_PUSH([C++])
# Check how to enable -Wall
LIBZMQ_LANG_WALL([CPPFLAGS="$libzmq_cv_[]_AC_LANG_ABBREV[]_wall_flag $CPPFLAGS"])
if test "x$libzmq_werror" = "xyes" -a "x$libzmq_cv_[]_AC_LANG_ABBREV[]_sun_studio_compiler" != "xyes"; then
LIBZMQ_LANG_WERROR([CPPFLAGS="$libzmq_cv_[]_AC_LANG_ABBREV[]_werror_flag $CPPFLAGS"])
fi
if test "x$libzmq_pedantic" = "xyes"; then
LIBZMQ_LANG_STRICT([CPPFLAGS="$libzmq_cv_[]_AC_LANG_ABBREV[]_strict_flag $CPPFLAGS"])
fi
AC_LANG_POP([C++])
AM_CONDITIONAL(BUILD_TIPC, test "x$libzmq_tipc_support" = "xyes")
AM_CONDITIONAL(BUILD_PGM, test "x$libzmq_pgm_ext" = "xyes")
AM_CONDITIONAL(ON_MINGW, test "x$libzmq_on_mingw32" = "xyes")
AM_CONDITIONAL(ON_ANDROID, test "x$libzmq_on_android" = "xyes")
AM_CONDITIONAL(ON_LINUX, test "x$libzmq_on_linux" = "xyes")
# Checks for library functions.
AC_TYPE_SIGNAL
AC_CHECK_FUNCS(perror gettimeofday clock_gettime memset socket getifaddrs freeifaddrs fork)
AC_CHECK_HEADERS([alloca.h])
LIBZMQ_CHECK_SOCK_CLOEXEC([AC_DEFINE(
[ZMQ_HAVE_SOCK_CLOEXEC],
[1],
[Whether SOCK_CLOEXEC is defined and functioning.])
])
# TCP keep-alives Checks.
LIBZMQ_CHECK_SO_KEEPALIVE([AC_DEFINE(
[ZMQ_HAVE_SO_KEEPALIVE],
[1],
[Whether SO_KEEPALIVE is supported.])
])
LIBZMQ_CHECK_TCP_KEEPCNT([AC_DEFINE(
[ZMQ_HAVE_TCP_KEEPCNT],
[1],
[Whether TCP_KEEPCNT is supported.])
])
LIBZMQ_CHECK_TCP_KEEPIDLE([AC_DEFINE(
[ZMQ_HAVE_TCP_KEEPIDLE],
[1],
[Whether TCP_KEEPIDLE is supported.])
])
LIBZMQ_CHECK_TCP_KEEPINTVL([AC_DEFINE(
[ZMQ_HAVE_TCP_KEEPINTVL],
[1],
[Whether TCP_KEEPINTVL is supported.])
])
LIBZMQ_CHECK_TCP_KEEPALIVE([AC_DEFINE(
[ZMQ_HAVE_TCP_KEEPALIVE],
[1],
[Whether TCP_KEEPALIVE is supported.])
])
AM_CONDITIONAL(HAVE_FORK, test "x$ac_cv_func_fork" = "xyes")
# Subst LIBZMQ_EXTRA_CFLAGS & CXXFLAGS & LDFLAGS
AC_SUBST(LIBZMQ_EXTRA_CFLAGS)
AC_SUBST(LIBZMQ_EXTRA_CXXFLAGS)
AC_SUBST(LIBZMQ_EXTRA_LDFLAGS)
AC_CONFIG_FILES([Makefile \
src/Makefile \
src/libzmq.pc \
doc/Makefile \
perf/Makefile \
tests/Makefile \
tools/Makefile \
builds/msvc/Makefile \
foreign/openpgm/Makefile \
builds/redhat/zeromq.spec])
AC_OUTPUT
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