check asan before use (#30)

CMakeLists.txt

@@ -7,6 +7,9 @@ project(yaLanTingLibs
         )
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
+list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)
+message(STATUS "CMAKE_MODULE_PATH: ${CMAKE_MODULE_PATH}")
+find_package(Threads REQUIRED)
 if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fcoroutines")
     set(CMAKE_CXX_FLAGS_RELEASE "-O2")
@@ -19,8 +22,14 @@ endif ()
 message(STATUS "Build type: ${CMAKE_BUILD_TYPE}")
 if (NOT CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
     if (CMAKE_BUILD_TYPE STREQUAL "Debug")
-        message("-- Use flag -fsanitize=address")
-        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address")
+        include(CheckASan)
+        check_asan(HAVE_ASAN)
+        if (HAVE_ASAN)
+            message("-- Use flag -fsanitize=address")
+            set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address")
+        else ()
+            message(WARNING "asan not found, you'd better install it for better code security!")
+        endif ()
     endif ()
 endif ()
 option(COVERAGE_TEST "Build with unit test coverage" OFF)
@@ -89,4 +98,4 @@ foreach (proj ${yaLanTingLibs_ENABLE_PROJECTS})
     endif ()
 endforeach ()
 
-install(DIRECTORY include DESTINATION include)
+install(DIRECTORY include DESTINATION include)

cmake/CheckASan.cmake

@@ -0,0 +1,14 @@
+macro(CHECK_ASAN _RESULT)
+    include(CheckCXXSourceCompiles)
+    set(CMAKE_REQUIRED_FLAGS "-fsanitize=address")
+    check_cxx_source_compiles(
+            [====[
+int main()
+{
+  return 0;
+}
+]====]
+            ${_RESULT}
+    )
+    unset(CMAKE_REQUIRED_FLAGS)
+endmacro()

src/coro_rpc/CMakeLists.txt

@@ -4,7 +4,7 @@ target_include_directories(libcoro_rpc INTERFACE
         $<BUILD_INTERFACE:${yaLanTingLibs_SOURCE_DIR}/include>
         $<INSTALL_INTERFACE:include>
         )
-find_package(Threads REQUIRED)
+
 target_link_libraries(libcoro_rpc INTERFACE
         Threads::Threads
         asio::asio