Cmake: Add Wshadow to default gcc builds.

Warn whenever a local variable or type declaration shadows another variable, parameter, or type. This will make sure (hopefully) that #611 don't come back. tested with: - cmake 3.13.4 & gcc 8.3.0 (debian) - cmake 3.13.4 & gcc 8.3.0 (Raspbian) - cmake 2.8.12.2 & gcc 4.8.2 (Zynq) Signed-off-by: Robin Getz <[email protected]>
analogdevicesinc · Nov 11, 2020 · 75573e6 · 75573e6
1 parent 8b5a339
commit 75573e6
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -79,6 +79,10 @@ elseif (CMAKE_COMPILER_IS_GNUCC)
 	if (HAS_WPEDANTIC)
 		set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wpedantic")
 	endif()
+	check_c_compiler_flag(-Wshadow HAS_WSHADOW)
+	if (HAS_WSHADOW)
+		set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wshadow")
+	endif()
 	# cmake 2.8 doesn't support C_STANDARD defined in set_target_properties
 	if (${CMAKE_VERSION} VERSION_LESS "3.2")
 		check_c_compiler_flag(-std=c99 HAS_C99)