Make it possible to pass extra build flags for test executable

These can be used to enable coverage or sanitizers for the tested code.

Author: sgunes-wirepas

test/CMakeLists.txt

@@ -3,9 +3,16 @@ cmake_minimum_required(VERSION 3.18)
 project(meshAPItest LANGUAGES CXX)
 
 set(CMAKE_CXX_STANDARD 17)
-set(CMAKE_BUILD_TYPE RelWithDebInfo)
+if(NOT CMAKE_BUILD_TYPE)
+    set(CMAKE_BUILD_TYPE RelWithDebInfo)
+endif()
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
+set(TEST_EXTRA_CFLAGS "" CACHE STRING "Extra compiler flags for WPC library and test code. For example '--coverage'.")
+set(TEST_EXTRA_LDFLAGS "" CACHE STRING "Extra linker flags for the test executable. For example '--coverage'.")
+separate_arguments(TEST_EXTRA_CFLAGS)
+separate_arguments(TEST_EXTRA_LDFLAGS)
+
 add_compile_options(-Wall -Werror -Wextra)
 
 set(WPC_LIB_DIR "${CMAKE_CURRENT_LIST_DIR}/../lib/")
@@ -42,3 +49,8 @@ target_link_libraries(${CMAKE_PROJECT_NAME}
 include(GoogleTest)
 gtest_discover_tests(${CMAKE_PROJECT_NAME})
 
+target_compile_options(wpc                   PRIVATE ${TEST_EXTRA_CFLAGS})
+target_compile_options(wpc_platform          PRIVATE ${TEST_EXTRA_CFLAGS})
+target_compile_options(${CMAKE_PROJECT_NAME} PRIVATE ${TEST_EXTRA_CFLAGS})
+target_link_options(${CMAKE_PROJECT_NAME} PRIVATE ${TEST_EXTRA_LDFLAGS})
+