[script] now make compile should work well.

Makefile

@@ -31,6 +31,7 @@ MAKEFLAGS := -s
 # Directory to build the codes
 SOURCE_DIR :=${PWD}
 BUILD_DIR ?= build
+CMAKE_GOALS = all
 
 # Find CMake command from system variable, otherwise use a default one
 ifeq ($(origin CMAKE_COMMAND),undefined)
@@ -52,20 +53,31 @@ export COMMENT_EXTRACT
 help:
 	@${PYTHON_EXEC} -c "$$COMMENT_EXTRACT"
 
-.PHONY: all
+.PHONY: help
 
 checkout: 
 # Update all the submodules
 	git submodule init
 	git submodule update --init --recursive
 
-compile:
-# Compile the code base
+prebuild:
+# Run cmake to generate Makefile under the build directory, before compilation
 	@mkdir -p ${BUILD_DIR}
 	echo "cd ${BUILD_DIR} && ${CMAKE_COMMAND} ${CMAKE_FLAGS} ${SOURCE_DIR}"
 	cd ${BUILD_DIR} && ${CMAKE_COMMAND} ${CMAKE_FLAGS} ${SOURCE_DIR}
-	echo "Building target(s): ${MAKECMDGOALS}"
-	@+${MAKE} -C ${BUILD_DIR} ${MAKECMDGOALS}
+
+compile: prebuild
+# Compile the code base. By default, all the targets will be compiled
+# Following options are available
+# .. option:: CMAKE_GOALS
+#
+#   Define the target for cmake to compile. for example, ``cmake_goals=openfpga`` indicates that only openfpga binary will be compiled 
+	echo "Building target(s): ${CMAKE_GOALS}"
+	@+${MAKE} -C ${BUILD_DIR} ${CMAKE_GOALS}
+
+list_cmake_targets: prebuild
+# Show the targets available to be built, which can be specified through ``CMAKE_GOALS`` when compile
+	cd ${BUILD_DIR} && make help && cd -
 
 all: checkout compile
 # A shortcut command to run checkout and compile in serial

docs/source/tutorials/getting_started/compile.rst

@@ -81,6 +81,10 @@ The following options are available for a custom build
 
 .. warning:: By default, only required modules in *Verilog-to-Routing* (VTR) is enabled. On other words, ``abc``, ``odin``, ``yosys`` and other add-ons inside VTR are not built. If you want to enable them, please look into the dedicated options of CMake scripts.  
 
+.. option:: CMAKE_GOALS=<string>
+
+  Specify the build target for CMake system. For example, ``cmake_goals=openfpga`` indicates that only openfpga binary will be compiled. For a detailed list of targets, use ``make list_cmake_targets`` to show. By default, all the build targets will be included. 
+
 .. _tutorial_compile_dependencies:
 
 Dependencies