Configure debug info to DWARF v4.

Author: microbit-carlos

utils/cmake/toolchains/ARM_GCC/compiler-flags.cmake

@@ -19,27 +19,29 @@ set(CMAKE_DEPFILE_FLAGS_CXX "-MMD -MT <OBJECT> -MF <DEPFILE>")
 set(CMAKE_C_OUTPUT_EXTENSION ".o")
 set(CMAKE_DEPFILE_FLAGS_C "-MMD -MT <OBJECT> -MF <DEPFILE>")
 
-set(CMAKE_C_FLAGS_DEBUG_INIT          "-g -gdwarf-3")
+set(CMAKE_C_FLAGS_RELWITHDEBINFO      "-g -gdwarf-4")
+set(CMAKE_C_FLAGS_DEBUG_INIT          "-g -gdwarf-4")
 set(CMAKE_C_FLAGS_MINSIZEREL_INIT     "-Os -DNDEBUG")
 set(CMAKE_C_FLAGS_RELEASE_INIT        "-Os -DNDEBUG")
-set(CMAKE_C_FLAGS_RELWITHDEBINFO_INIT "-Os -g -gdwarf-3 -DNDEBUG")
+set(CMAKE_C_FLAGS_RELWITHDEBINFO_INIT "-Os -g -gdwarf-4 -DNDEBUG")
 set(CMAKE_INCLUDE_SYSTEM_FLAG_C "-isystem ")
 
-
-set(CMAKE_ASM_FLAGS_DEBUG_INIT          "-g -gdwarf-3")
+set(CMAKE_ASM_FLAGS_RELWITHDEBINFO      "-g -gdwarf-4")
+set(CMAKE_ASM_FLAGS_DEBUG_INIT          "-g -gdwarf-4")
 set(CMAKE_ASM_FLAGS_MINSIZEREL_INIT     "-Os -DNDEBUG")
 set(CMAKE_ASM_FLAGS_RELEASE_INIT        "-Os -DNDEBUG")
-set(CMAKE_ASM_FLAGS_RELWITHDEBINFO_INIT "-Os -g -gdwarf-3 -DNDEBUG")
+set(CMAKE_ASM_FLAGS_RELWITHDEBINFO_INIT "-Os -g -gdwarf-4 -DNDEBUG")
 set(CMAKE_INCLUDE_SYSTEM_FLAG_ASM  "-isystem ")
 
 set(CMAKE_CXX_CREATE_STATIC_LIBRARY "<CMAKE_AR> -cr <LINK_FLAGS> <TARGET> <OBJECTS>")
 
 set(CMAKE_CXX_LINK_EXECUTABLE       "<CMAKE_CXX_COMPILER> <CMAKE_CXX_LINK_FLAGS> <LINK_FLAGS> -Wl,-Map,<TARGET>.map -Wl,--start-group <OBJECTS> <LINK_LIBRARIES> -lnosys -lstdc++ -lsupc++ -lm -lc -lgcc -lstdc++ -lsupc++ -lm -lc -lgcc -Wl,--end-group  --specs=nano.specs -o <TARGET>")
 
-set(CMAKE_CXX_FLAGS_DEBUG_INIT          "-g -gdwarf-3")
+set(CMAKE_CXX_FLAGS_RELWITHDEBINFO      "-g -gdwarf-4")
+set(CMAKE_CXX_FLAGS_DEBUG_INIT          "-g -gdwarf-4")
 set(CMAKE_CXX_FLAGS_MINSIZEREL_INIT     "-Os -DNDEBUG")
 set(CMAKE_CXX_FLAGS_RELEASE_INIT        "-Os -DNDEBUG")
-set(CMAKE_CXX_FLAGS_RELWITHDEBINFO_INIT "-Os -g -gdwarf-3 -DNDEBUG")
+set(CMAKE_CXX_FLAGS_RELWITHDEBINFO_INIT "-Os -g -gdwarf-4 -DNDEBUG")
 set(CMAKE_INCLUDE_SYSTEM_FLAG_CXX "-isystem ")
 
 if (CMAKE_C_COMPILER_VERSION VERSION_GREATER "7.1.0" OR CMAKE_C_COMPILER_VERSION VERSION_EQUAL "7.1.0")