support FetchContent (#561)

add FetchContent

Author: eeliu

CMakeLists.txt

@@ -10,16 +10,46 @@ Dependency|Version
 cmake| 3.2+
 GCC| GCC `4.7+`
 
-### Build
+#### Build
 
+>@obsoleted
 Use CMake `add_subdirectory`;
-[CMakeLists.txt example](../../CMakeLists.txt)
+[CMakeLists.txt example](../../src/CPP/CMakeLists.txt)
 
 ```
 $ mkdir build
 $ cd build
 $ cmake .. && make 
 ```
+#### Integrate in your own project 
+
+> Use cmake FetchContent
+
+[CMakeLists.txt example](../../src/CPP/CMakeLists.txt)
+
+```shell
+include(FetchContent)
+FetchContent_Declare(
+  pinpoint
+  GIT_REPOSITORY https://github.com/pinpoint-c-agent/pinpoint-c-agent.git
+  # GIT_TAG        74bc39d813d664cb56b78b1506d91932c8131396 
+  # not recommended, please use hash key like `74bc39d813d664cb56b78b1506d91932c8131396`
+  GIT_TAG        origin/dev
+)
+
+FetchContent_GetProperties(pinpoint)
+if (NOT pinpoint_POPULATED)
+    FetchContent_Populate(pinpoint)
+    add_subdirectory(${pinpoint_SOURCE_DIR}/common ${pinpoint_BINARY_DIR})
+endif ()
+
+FetchContent_MakeAvailable(pinpoint)
+
+add_executable(app test_pinpoint.cpp)
+target_link_libraries(app PRIVATE  pinpoint_common_static rt)
+```
+
+
 ### Run
 
 ```

DOC/C-CPP/Readme.md

@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.13)
-project(common VERSION 0.4.24 DESCRIPTION  "pinpoint common library")
+project(pinpoint VERSION 0.4.24 DESCRIPTION  "pinpoint common library")
 
 set(CMAKE_CXX_STANDARD 11)
 
@@ -45,18 +45,26 @@ link_directories(${CMAKE_BINARY_DIR}/lib)
 add_subdirectory(jsoncpp)
 add_subdirectory(src)
 
+add_library(pinpoint_common_static STATIC $<TARGET_OBJECTS:pinpoint_common_obj> $<TARGET_OBJECTS:jsoncppObj>)
+
+target_include_directories(pinpoint_common_static PUBLIC
+        $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+        $<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/include>
+        $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}/include>
+)
+
 if(UNIX AND NOT APPLE)
     include(GNUInstallDirs)
     add_library(pinpoint_common_shared SHARED $<TARGET_OBJECTS:pinpoint_common_obj> $<TARGET_OBJECTS:jsoncppObj>)  
     install(DIRECTORY include/ DESTINATION include/pinpoint_common
             FILES_MATCHING PATTERN "*.h")
 
-    set_target_properties(pinpoint_common_shared pinpoint_common PROPERTIES 
+    set_target_properties(pinpoint_common_shared pinpoint_common_static PROPERTIES 
             VERSION ${PROJECT_VERSION}
             SOVERSION 1
             PUBLIC_HEADER "${CMAKE_CURRENT_SOURCE_DIR}/include/common.h")      
 
-    install(TARGETS pinpoint_common_shared pinpoint_common ${INSTALL_EXPORT}
+    install(TARGETS pinpoint_common_shared pinpoint_common_static ${INSTALL_EXPORT}
         RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
         LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
         ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}

common/CMakeLists.txt

@@ -4,4 +4,4 @@ foreach(dir  ${src_dir})
 endforeach()
 
 add_library(pinpoint_common_obj OBJECT ${SRC_FILES})
-add_library(pinpoint_common STATIC $<TARGET_OBJECTS:pinpoint_common_obj> $<TARGET_OBJECTS:jsoncppObj>)
+# add_library(pinpoint_common STATIC $<TARGET_OBJECTS:pinpoint_common_obj> $<TARGET_OBJECTS:jsoncppObj>)

common/src/CMakeLists.txt

@@ -6,14 +6,14 @@ target_compile_definitions(TestCommon PRIVATE "-DUTEST -DCOMMON_DEBUG")
 # message("${CMAKE_BINARY_DIR}/lib")
 if (WITH_CODECOVERAGE AND LINUX_)
     # message("enable -lgcov")
-    target_link_libraries(TestCommon pinpoint_common gtest_main rt gcov )
+    target_link_libraries(TestCommon pinpoint_common_static gtest_main rt gcov )
 elseif(APPLE)
-    target_link_libraries(TestCommon pinpoint_common gtest_main)
+    target_link_libraries(TestCommon pinpoint_common_static gtest_main)
 elseif(MSVC)
     message( FATAL_ERROR "pinpoint-c-agent not support windows, if you need create an issue https://github.com/pinpoint-apm/pinpoint-c-agent/issues" )
 else()
     message("------------------------------")
-    target_link_libraries(TestCommon pinpoint_common gtest_main rt)
+    target_link_libraries(TestCommon pinpoint_common_static gtest_main rt)
 endif()
 
 add_test(TestCommon TestCommon)

common/test/CMakeLists.txt

@@ -0,0 +1,25 @@
+cmake_minimum_required(VERSION 3.13)
+project(common)
+set(CMAKE_CXX_STANDARD 11)
+
+include(FetchContent)
+FetchContent_Declare(
+  pinpoint
+  GIT_REPOSITORY https://github.com/pinpoint-c-agent/pinpoint-c-agent.git
+  # GIT_TAG        74bc39d813d664cb56b78b1506d91932c8131396 
+  # not recommended, please use hash key like `74bc39d813d664cb56b78b1506d91932c8131396`
+  GIT_TAG        origin/dev
+)
+
+FetchContent_GetProperties(pinpoint)
+if (NOT pinpoint_POPULATED)
+    FetchContent_Populate(pinpoint)
+    add_subdirectory(${pinpoint_SOURCE_DIR}/common ${pinpoint_BINARY_DIR})
+endif ()
+
+FetchContent_MakeAvailable(pinpoint)
+
+add_executable(test_pinpoint_cpp test_pinpoint.cpp)
+add_executable(test_pinpoint_c test_pinpoint.c)
+target_link_libraries(test_pinpoint_cpp PRIVATE  pinpoint_common_static rt)
+target_link_libraries(test_pinpoint_c pinpoint_common_static rt)