Re: [PATCH v2 6/6] Makefile: add {program,xdiff,test,git}-objs & objects targets

> Add targets to compile the various *.o files we declared in commonly
> used *_OBJS variables. This is useful for debugging purposes, to
> e.g. get to the point where we can compile a git.o. See [1] for a
> use-case for this target.
>
> https://lore.kernel.org/git/YBCGtd9if0qtuQxx@coredump.intra.peff.net/
>
> Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
> ---
>  Makefile | 5 +++++
>  1 file changed, 5 insertions(+)

> diff --git a/Makefile b/Makefile
> index 07763353423..31123639f65 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -683,6 +683,7 @@ PROGRAM_OBJS += http-backend.o
>  PROGRAM_OBJS += imap-send.o
>  PROGRAM_OBJS += sh-i18n--envsubst.o
>  PROGRAM_OBJS += shell.o
> +program-objs: $(PROGRAM_OBJS)
>  
>  # Binary suffix, set to .exe for Windows builds
>  X =
> @@ -2383,13 +2384,16 @@ XDIFF_OBJS += xdiff/xmerge.o
>  XDIFF_OBJS += xdiff/xpatience.o
>  XDIFF_OBJS += xdiff/xprepare.o
>  XDIFF_OBJS += xdiff/xutils.o
> +xdiff-objs: $(XDIFF_OBJS)
>  
>  TEST_OBJS := $(patsubst %$X,%.o,$(TEST_PROGRAMS)) $(patsubst %,t/helper/%,$(TEST_BUILTINS_OBJS))
> +test-objs: $(TEST_OBJS)
>  
>  GIT_OBJS += $(LIB_OBJS)
>  GIT_OBJS += $(BUILTIN_OBJS)
>  GIT_OBJS += common-main.o
>  GIT_OBJS += git.o
> +git-objs: $(GIT_OBJS)
>  
>  OBJECTS += $(GIT_OBJS)
>  OBJECTS += $(PROGRAM_OBJS)
> @@ -2399,6 +2403,7 @@ OBJECTS += $(FUZZ_OBJS)
>  ifndef NO_CURL
>  	OBJECTS += http.o http-walker.o remote-curl.o
>  endif
> +objects: $(OBJECTS)
>  
>  dep_files := $(foreach f,$(OBJECTS),$(dir $f).depend/$(notdir $f).d)
>  dep_dirs := $(addsuffix .depend,$(sort $(dir $(OBJECTS))))