Merge pull request #5991 from Yonezawa-T2/use_lldb

make: use LLDB if GDB is not available on native platform

boards/native/Makefile.include

@@ -34,7 +34,11 @@ export OFLAGS =
 endif
 endif
 
-export DEBUGGER = gdb
+ifeq ($(shell uname -s),Darwin)
+export DEBUGGER ?= lldb
+else
+export DEBUGGER ?= gdb
+endif
 export TERMPROG ?= $(ELF)
 export FLASHER = true
 export VALGRIND ?= valgrind
@@ -93,7 +97,11 @@ endif
 export TERMFLAGS := $(PORT) $(TERMFLAGS)
 
 export ASFLAGS =
+ifeq ($(shell basename $(DEBUGGER)),lldb)
+export DEBUGGER_FLAGS = -- $(ELF) $(TERMFLAGS)
+else
 export DEBUGGER_FLAGS = -q --args $(ELF) $(TERMFLAGS)
+endif
 term-valgrind: export VALGRIND_FLAGS ?= \
 	--leak-check=full \
 	--track-origins=yes \