adds TGC5L environment

CMakeLists.txt

@@ -1,12 +1,15 @@
-	  	add_custom_target(fw-hello-world ALL 
-	  		COMMAND make -C ${riscvfw_SOURCE_DIR}/hello-world
-			USES_TERMINAL
-			WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
-	  	add_custom_target(fw-dhrystone ALL 
-	  		COMMAND make -C ${riscvfw_SOURCE_DIR}/benchmarks/dhrystone
-	        USES_TERMINAL
-	        WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
-	  	add_custom_target(fw-coremark ALL 
-	  		COMMAND make -C ${riscvfw_SOURCE_DIR}/benchmarks/coremark/cm PORT_DIR=../tgc
-	        USES_TERMINAL
-	        WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
+if (NOT DEFINED TARGET)
+	set(TARGET iss)
+endif()
+add_custom_target(fw-hello-world ALL 
+	COMMAND make -C ${riscvfw_SOURCE_DIR}/hello-world BOARD=${TARGET}
+	USES_TERMINAL
+	WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
+add_custom_target(fw-dhrystone ALL 
+	COMMAND make -C ${riscvfw_SOURCE_DIR}/benchmarks/dhrystone BOARD=${TARGET}
+    USES_TERMINAL
+    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
+add_custom_target(fw-coremark ALL 
+	COMMAND make -C ${riscvfw_SOURCE_DIR}/benchmarks/coremark/cm PORT_DIR=../tgc BOARD=${TARGET}
+    USES_TERMINAL
+    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})