Error message from GCOV

 Issue : #22

 To suppress the error message, eplicitly delete the *.gcda.

Author: suikan4github

CHANGELOG.md

@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Added
 ### Changed
 ### Fixed
+- [Issue #22](https://github.com/suikan4github/template_application/issues/22) : Error message from GCOV 
 
 ## [1.4.0] - 2022-01-22
 ### Added

test/CMakeLists.txt

@@ -19,6 +19,14 @@ set(TEST_EXECUTABLE_NAME test_${PROJECT_NAME})
 # Add the executable for the testcase which is using googletest
 add_executable(${TEST_EXECUTABLE_NAME} ${TEST_SRC} ${LIB_SRC})
 
+    # Delete the gcov data file before linking. Otherwise, we will get many errors. 
+    add_custom_command(
+        TARGET ${TEST_EXECUTABLE_NAME} PRE_LINK
+        COMMAND find . -name "*.gcda" -delete
+        COMMENT "Deleting *.gcda files under ${CMAKE_BINARY_DIR}"
+        WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
+        VERBATIM)
+
     # Add the library under test.
     target_link_libraries(${TEST_EXECUTABLE_NAME}  
                             "gtest_main"