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# ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_zmq.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_ZMQ([MINIMUM-VERSION], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
#
# DESCRIPTION
#
# Test for the ZMQ libraries of a particular version (or newer). The
# default version tested for is 4.0.0.
#
# The macro tests for ZMQ libraries in the library/include path, and, when
# provided, also in the path given by --with-zmq.
#
# This macro calls:
#
# AC_SUBST(ZMQ_CPPFLAGS) / AC_SUBST(ZMQ_LDFLAGS) / AC_SUBST(ZMQ_LIBS)
#
# And sets:
#
# HAVE_ZMQ
#
# LICENSE
#
# Copyright (c) 2016 Jeroen Meijer <jjgmeijer@gmail.com>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#serial 3
AC_DEFUN([AX_ZMQ], [
AC_ARG_WITH([zmq], [AS_HELP_STRING([--with-zmq=<prefix>],[ZMQ prefix directory])], [
ZMQ_LDFLAGS="-L${with_zmq}/lib"
ZMQ_CPPFLAGS="-I${with_zmq}/include"
])
HAVE_ZMQ=0
if test "$with_zmq" != "no"; then
LD_FLAGS="$LDFLAGS $ZMQ_LDFLAGS"
CPPFLAGS="$CPPFLAGS $ZMQ_CPPFLAGS"
AC_LANG_PUSH([C])
AC_CHECK_HEADER(zmq.h, [zmq_h=yes], [zmq_h=no])
AC_LANG_POP([C])
if test "$zmq_h" = "yes"; then
version=ifelse([$1], ,4.0.0,$1)
AC_MSG_CHECKING([for ZMQ version >= $version])
version=$(echo $version | tr '.' ',')
AC_EGREP_CPP([version_ok], [
#include <zmq.h>
#if defined(ZMQ_VERSION) && ZMQ_VERSION >= ZMQ_MAKE_VERSION($version)
version_ok
#endif
],[
AC_MSG_RESULT(yes)
HAVE_ZMQ=1
ZMQ_LIBS="-lzmq"
AC_SUBST(ZMQ_LDFLAGS)
AC_SUBST(ZMQ_CPPFLAGS)
AC_SUBST(ZMQ_LIBS)
], AC_MSG_RESULT([no valid ZMQ version was found]))
else
AC_MSG_WARN([no valid ZMQ installation was found])
fi
if test $HAVE_ZMQ = 1; then
# execute ACTION-IF-FOUND (if present):
ifelse([$2], , :, [$2])
else
# execute ACTION-IF-NOT-FOUND (if present):
ifelse([$3], , :, [$3])
fi
else
AC_MSG_NOTICE([not checking for ZMQ])
fi
AC_DEFINE(HAVE_ZMQ,,[define if the ZMQ library is available])
])
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