Detect ZeroMQ version at build time; hide NSIS dependencies in new cmake folder.

CMakeLists.txt

@@ -4,10 +4,7 @@ cmake_minimum_required (VERSION 2.8)
 
 project (ZeroMQ)
 
-# TODO: Extract from include/zmq.h
+include (${CMAKE_SOURCE_DIR}/cmake/Modules/TestZMQVersion.cmake)
-set (ZMQ_VERSION_MAJOR "3")
-set (ZMQ_VERSION_MINOR "2")
-set (ZMQ_VERSION_PATCH "0")
 
 # WARNING: Windows Python will override Cygwin yet not work with Asciidoc.
 #find_package (PythonInterp REQUIRED)
@@ -198,9 +195,9 @@ add_custom_command(
 list(APPEND sources ${CMAKE_BINARY_DIR}/platform.hpp)
 
 if (CMAKE_SIZEOF_VOID_P EQUAL 8)
-	set (nsis-template ${CMAKE_SOURCE_DIR}/NSIS.template64.in)
+	set (nsis-template ${CMAKE_SOURCE_DIR}/cmake/NSIS.template64.in)
 else (CMAKE_SIZEOF_VOID_P EQUAL 8)
-	set (nsis-template ${CMAKE_SOURCE_DIR}/NSIS.template32.in)
+	set (nsis-template ${CMAKE_SOURCE_DIR}/cmake/NSIS.template32.in)
 endif (CMAKE_SIZEOF_VOID_P EQUAL 8)
 add_custom_command(
 	OUTPUT ${CMAKE_BINARY_DIR}/NSIS.template.in

cmake/Modules/TestZMQVersion.cmake

@@ -0,0 +1,27 @@
+
+  MESSAGE(STATUS "Detecting ZMQ")
+        SET(TRY_RUN_DIR ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_FILES_DIRECTORY}/zmq_run.dir)
+
+        TRY_RUN(RUN_RESULT COMPILE_RESULT
+          ${TRY_RUN_DIR}
+          ${CMAKE_SOURCE_DIR}/cmake/Modules/zmq_version.cpp
+          CMAKE_FLAGS 
+            "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_SOURCE_DIR}/include"
+          COMPILE_OUTPUT_VARIABLE COMPILE_OUTPUT
+          RUN_OUTPUT_VARIABLE RUN_OUTPUT)
+
+        IF(COMPILE_RESULT)
+          IF(RUN_RESULT MATCHES "FAILED_TO_RUN")
+            MESSAGE(STATUS "Detecting ZMQ - failed")
+          ELSE()
+            STRING(REGEX REPLACE "([0-9]+)\\.([0-9]+)\\.([0-9]+).*" "\\1" ZMQ_VERSION_MAJOR "${RUN_OUTPUT}")
+            STRING(REGEX REPLACE "([0-9]+)\\.([0-9]+)\\.([0-9]+).*" "\\2" ZMQ_VERSION_MINOR "${RUN_OUTPUT}")
+            STRING(REGEX REPLACE "([0-9]+)\\.([0-9]+)\\.([0-9]+).*" "\\3" ZMQ_VERSION_PATCH "${RUN_OUTPUT}")
+            MESSAGE(STATUS "Detecting ZMQ - ${ZMQ_VERSION_MAJOR}.${ZMQ_VERSION_MINOR}.${ZMQ_VERSION_PATCH}")
+          ENDIF()
+        ELSE()
+          MESSAGE(STATUS "Check for ZMQ version - not found")
+          MESSAGE(STATUS "Detecting ZMQ - failed")
+        ENDIF()
+
+

cmake/Modules/zmq_version.cpp

@@ -0,0 +1,31 @@
+/*
+    Copyright (c) 2007-2012 iMatix Corporation
+    Copyright (c) 2009-2011 250bpm s.r.o.
+    Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file
+
+    This file is part of 0MQ.
+
+    0MQ is free software; you can redistribute it and/or modify it under
+    the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    0MQ 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 Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "zmq.h"
+
+#include <stdio.h>
+
+int main ()
+{
+    printf ("%d.%d.%d\n", ZMQ_VERSION_MAJOR, ZMQ_VERSION_MINOR, ZMQ_VERSION_PATCH);
+    return 0;
+}
+