only build xerces if not found on the system

Former-commit-id: 88bb52a710

resources/3rdparty/CMakeLists.txt

@@ -4,17 +4,7 @@ add_custom_target(test-resources)
 set(STORM_3RDPARTY_SOURCE_DIR ${PROJECT_SOURCE_DIR}/resources/3rdparty)
 set(STORM_3RDPARTY_BINARY_DIR ${PROJECT_BINARY_DIR}/resources/3rdparty)
 
-ExternalProject_Add(
+
-    xercesc
-    SOURCE_DIR ${STORM_3RDPARTY_SOURCE_DIR}/xercesc-3.1.2
-    CONFIGURE_COMMAND ${STORM_3RDPARTY_SOURCE_DIR}/xercesc-3.1.2/configure --prefix=${CMAKE_CURRENT_BINARY_DIR}/xercesc-3.1.2 --libdir=${CMAKE_CURRENT_BINARY_DIR}/xercesc-3.1.2/lib CC=${CMAKE_C_COMPILER} CXX=${CMAKE_CXX_COMPILER} CFLAGS=-O3 CXXFLAGS=-O3
-    PREFIX ${STORM_3RDPARTY_BINARY_DIR}/xercesc-3.1.2
-    BUILD_COMMAND make
-    BUILD_IN_SOURCE 0
-    LOG_CONFIGURE ON
-    LOG_BUILD ON
-    LOG_INSTALL ON
-)
 
 ExternalProject_Add(
     glpk
@@ -385,25 +375,7 @@ endif(ENABLE_MSAT)
 ##
 #############################################################
 
-if(USE_XERCES)
+include(${STORM_3RDPARTY_SOURCE_DIR}/include_xerces.cmake)
-    find_package(Xerces QUIET REQUIRED)
-    if(XERCES_FOUND)
-        message(STATUS "StoRM - Use system version of xerces")
-    else()
-        message(STATUS "StoRM - Use shipped version of xerces")
-        set(XERCES_ROOT ${CMAKE_BINARY_DIR}/resources/3rdparty/xercesc-3.1.2)
-        set(XERCESC_INCLUDE ${XERCES_ROOT}/include)
-        set(XERCES_LIBRARY_PATH ${XERCES_ROOT}/lib)
-        set(XERCESC_LIBRARIES ${XERCES_LIBRARY_PATH}/libxerces-c.a)
-
-        add_dependencies(resources xercesc)
-    endif()
-
-    message (STATUS "StoRM - Linking with xercesc")
-    set(STORM_HAVE_XERCES ON)
-    include_directories(${XERCESC_INCLUDE})
-    list(APPEND STORM_LINK_LIBRARIES ${XERCESC_LIBRARIES})
-endif(USE_XERCES)
 
 #############################################################
 ##

resources/3rdparty/include_xerces.cmake

@@ -0,0 +1,31 @@
+if(USE_XERCES)
+    find_package(Xerces QUIET REQUIRED)
+    if(XERCES_FOUND)
+        message(STATUS "StoRM - Use system version of xerces")
+    else()
+        message(STATUS "StoRM - Use shipped version of xerces")
+        ExternalProject_Add(
+                xercesc
+                SOURCE_DIR ${STORM_3RDPARTY_SOURCE_DIR}/xercesc-3.1.2
+                CONFIGURE_COMMAND ${STORM_3RDPARTY_SOURCE_DIR}/xercesc-3.1.2/configure --prefix=${CMAKE_CURRENT_BINARY_DIR}/xercesc-3.1.2 --libdir=${CMAKE_CURRENT_BINARY_DIR}/xercesc-3.1.2/lib CC=${CMAKE_C_COMPILER} CXX=${CMAKE_CXX_COMPILER} CFLAGS=-O3 CXXFLAGS=-O3
+                PREFIX ${STORM_3RDPARTY_BINARY_DIR}/xercesc-3.1.2
+                BUILD_COMMAND make
+                BUILD_IN_SOURCE 0
+                LOG_CONFIGURE ON
+                LOG_BUILD ON
+                LOG_INSTALL ON
+        )
+
+        set(XERCES_ROOT ${STORM_3RDPARTY_BINARY_DIR}/xercesc-3.1.2)
+        set(XERCESC_INCLUDE ${XERCES_ROOT}/include)
+        set(XERCES_LIBRARY_PATH ${XERCES_ROOT}/lib)
+        set(XERCESC_LIBRARIES ${XERCES_LIBRARY_PATH}/libxerces-c.a)
+
+        add_dependencies(resources xercesc)
+    endif()
+
+    message (STATUS "StoRM - Linking with xercesc")
+    set(STORM_HAVE_XERCES ON)
+    include_directories(${XERCESC_INCLUDE})
+    list(APPEND STORM_LINK_LIBRARIES ${XERCESC_LIBRARIES})
+endif(USE_XERCES)