Support additional CMake build options

CMakeLists.txt

@@ -9,10 +9,6 @@ set(CMAKE_CXX_EXTENSIONS OFF)
 # For CMake < 3.1.
 add_compile_options(-std=c++11)
 
-subdirs(test readme-helper)
-
-include_directories(${sdptransform_SOURCE_DIR}/include)
-
 set(
 	SOURCE_FILES
 	src/grammar.cpp
@@ -22,11 +18,35 @@ set(
 
 set(
 	HEADER_FILES
-	include/sdptransform.hpp
-	include/json.hpp
+	${sdptransform_BINARY_DIR}/include/sdptransform.hpp
 )
 
-add_library(sdptransform STATIC ${SOURCE_FILES} ${HEADER_FILES})
-
-install(TARGETS sdptransform DESTINATION lib)
+option(BUILD_TESTS "Build tests" ON)
+if(BUILD_TESTS)
+	add_subdirectory(test)
+endif()
+
+option(BUILD_README_HELPER "Build readme-helper" ON)
+if(BUILD_README_HELPER)
+	add_subdirectory(readme-helper)
+endif()
+
+option(BUILD_SHARED_LIBS "Build shared library" OFF)
+add_library(sdptransform ${SOURCE_FILES})
+
+target_include_directories(sdptransform PUBLIC ${sdptransform_BINARY_DIR}/include)
+
+option(USE_EXTERNAL_JSON "Use external nlohmann_json instead of bundled" OFF)
+if(USE_EXTERNAL_JSON)
+	find_package(nlohmann_json REQUIRED)
+	target_link_libraries(sdptransform nlohmann_json::nlohmann_json)
+	set(JSON_HPP_LOCATION "<nlohmann/json.hpp>")
+else()
+	target_include_directories(sdptransform PUBLIC thirdparty)
+	list(APPEND HEADER_FILES thirdparty/json.hpp)
+	set(JSON_HPP_LOCATION "\"json.hpp\"")
+endif()
+configure_file(include/sdptransform.hpp.in include/sdptransform.hpp)
+
+install(TARGETS sdptransform)
 install(FILES ${HEADER_FILES} DESTINATION include/sdptransform)

include/sdptransform.hpp → include/sdptransform.hpp.in

@@ -1,7 +1,7 @@
 #ifndef SDPTRANSFORM_HPP
 #define SDPTRANSFORM_HPP
 
-#include "json.hpp"
+#include @JSON_HPP_LOCATION@
 #include <string>
 #include <vector>
 #include <map>

readme-helper/CMakeLists.txt

@@ -1,5 +1,3 @@
-include_directories(${sdptransform_SOURCE_DIR}/include)
-
 set(
 	SOURCE_FILES
 	readme.cpp

test/CMakeLists.txt

@@ -1,6 +1,3 @@
-include_directories(${sdptransform_SOURCE_DIR}/include)
-include_directories(include)
-
 set(
 	SOURCE_FILES
 	tests.cpp
@@ -14,6 +11,7 @@ set(
 )
 
 add_executable(test_sdptransform ${SOURCE_FILES} ${HEADER_FILES})
+target_include_directories(test_sdptransform PRIVATE include)
 
 if(${CMAKE_SYSTEM_NAME} STREQUAL "Android")
   	target_link_libraries(test_sdptransform sdptransform android log)