[C++] Set working directory when building samples codecs. Issue #624.

Author: mjpt777

sbe-samples/src/main/cpp/CMakeLists.txt

@@ -24,6 +24,7 @@ set(EXAMPLES_SCHEMA ${CODEC_EXAMPLES_SCHEMA_DIR}/example-schema.xml)
 
 add_custom_command(
     OUTPUT ${GENERATED_CODECS}
+    WORKING_DIRECTORY ${CODEC_EXAMPLES_SCHEMA_DIR}
     DEPENDS ${EXAMPLES_SCHEMA} sbe-jar ${SBE_JAR}
     COMMAND ${Java_JAVA_EXECUTABLE} -Dsbe.output.dir=${CODEC_TARGET_DIR} -Dsbe.generate.ir=true -Dsbe.target.language=cpp -Dsbe.xinclude.aware=true -jar ${SBE_JAR} ${EXAMPLES_SCHEMA}
 )

sbe-samples/src/main/resources/example-schema.xml

@@ -7,11 +7,7 @@
                    semanticVersion="5.2"
                    description="Example schema"
                    byteOrder="littleEndian">
-    <xi:include href="common-types.xml">
-        <xi:fallback>
-            <xi:include href="../../../../../../sbe-samples/src/main/resources/common-types.xml"/>
-        </xi:fallback>
-    </xi:include>
+    <xi:include href="common-types.xml"/>
     <types>
         <type name="ModelYear" primitiveType="uint16"/>
         <type name="VehicleCode" primitiveType="char" length="6" characterEncoding="ASCII"/>