build: readd unsafe build to show #warnings in CI

Signed-off-by: Carlos Gomes Martinho <carlos.gomes_martinho@siemens.com>
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3dd2270..88145f2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -175,6 +175,11 @@
 
     if(CMAKE_COMPILER_IS_CLANG OR CMAKE_COMPILER_IS_GNU)
         set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Werror")
+        if(UNSAFE_BUILD)
+            set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-error=cpp")
+            set(CMAKE_C_FLAGS_ASAN "${CMAKE_C_FLAGS_ASAN} -Wno-error=cpp")
+            set(CMAKE_C_FLAGS_ASANDBG "${CMAKE_C_FLAGS_ASANDBG} -Wno-error=cpp")
+        endif(UNSAFE_BUILD)
     endif(CMAKE_COMPILER_IS_CLANG OR CMAKE_COMPILER_IS_GNU)
 endif(MBEDTLS_FATAL_WARNINGS)