build: Relax compiler warnings to support more compilers

Threating warning as error is a good practice durring development phase,
for release it's ok to relax this to support more (future) compilers
and then provide best effort support on non supported environements.

For instance we might allow users to support stable version of gcc
(gcc-13 currently which is not yet enabled in our CI)

Of course this change should be reverted on development branch, ASAP,
and introduced again for next releases.

Ideally it should be near to release tags.

Origin: uic/pull-requests/2704/overview
Relate-to: uic/pull-requests/2705/overview?commentId=796680
Relate-to: c.s.com/x/FND4Dg#BrainstormItems-Identifystandardsbreakage
Forwarded: uic/pull-requests/2704/overview
Bug-SiliconLabs: UIC-3202
Relate-to: SiliconLabsSoftware/z-wave-engine-application-layer#6
Relate-to: SiliconLabsSoftware/z-wave-protocol-controller#71
Signed-off-by: Philippe Coval <philippe.coval@silabs.com>

Author: rzr

cmake/include/compiler_options.cmake

@@ -31,8 +31,8 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON) # Do not allow fallback to previous C++
 set(CMAKE_CXX_EXTENSIONS ON) # Enable gnu++11 extentions
 
 # Set compiler Flags
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -pipe -Werror -Wall")
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pipe -Werror -Wall")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -pipe -Wall")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pipe -Wall")
 
 # Only add code coverage when CMAKE_GCOV is True
 if(CMAKE_GCOV)