From mboxrd@z Thu Jan  1 00:00:00 1970
From: xuyang.jy <xuyang.jy@cn.fujitsu.com>
Date: Tue, 10 Apr 2018 13:35:14 +0800
Subject: [LTP] [PATCH 1/1] utils/compat_16.mk: Further cleanup of unused
 sections and variables
In-Reply-To: <20180409120028.30692-1-pvorel@suse.cz>
References: <20180409120028.30692-1-pvorel@suse.cz>
Message-ID: <5ACC4D12.9040000@cn.fujitsu.com>
List-Id: <ltp.lists.linux.it>
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To: ltp@lists.linux.it

于 2018/4/9 20:00, Petr Vorel 写道:
> Signed-off-by: Petr Vorel<pvorel@suse.cz>
> ---
> -%_16.o: %.c $(COMPAT_16_H)
> Is this make dependency for recompiling when header changes? It doesn't
> behave like that but maybe I'm missing something.

Hi Petr

-%_16.o: %.c $(COMPAT_16_H)

This make dependency for recompiling _16.o when header changes.

$(MAKE_TARGETS_OBJS_WO_COMPAT_16): $(COMPAT_16_H)
.INTERMEDIATE: $(MAKE_TARGETS_OBJS_WO_COMPAT_16)

This make dependency for recompiling .o when header changes.

I think you may miss something.

This patch will reappear the problem that has been fixed since commit
631d16671d(syscalls/utils/compat_16.mk: fix build dependencies).
If we touch/modify the compat_tst_16.h/compat_16.h file and excute "make"
in any of syscalls directories which includes compat_16.mk, nothing will
happen.
  
Best Regards
Yang Xu

> Kind regards,
> Petr
> ---
>   testcases/kernel/syscalls/setuid/Makefile    |  3 ---
>   testcases/kernel/syscalls/utils/compat_16.mk | 22 +---------------------
>   2 files changed, 1 insertion(+), 24 deletions(-)
>
> diff --git a/testcases/kernel/syscalls/setuid/Makefile b/testcases/kernel/syscalls/setuid/Makefile
> index 6bd943aaf..056bb9e80 100644
> --- a/testcases/kernel/syscalls/setuid/Makefile
> +++ b/testcases/kernel/syscalls/setuid/Makefile
> @@ -19,8 +19,5 @@ top_srcdir		?= ../../../..
>
>   include $(top_srcdir)/include/mk/testcases.mk
>
> -#for compat_16.mk uses the compat_16_tst.h
> -COMPAT_TST_16_H		:= 1
> -
>   include $(abs_srcdir)/../utils/compat_16.mk
>   include $(top_srcdir)/include/mk/generic_leaf_target.mk
> diff --git a/testcases/kernel/syscalls/utils/compat_16.mk b/testcases/kernel/syscalls/utils/compat_16.mk
> index 0565ddefa..3dee0c230 100644
> --- a/testcases/kernel/syscalls/utils/compat_16.mk
> +++ b/testcases/kernel/syscalls/utils/compat_16.mk
> @@ -56,28 +56,8 @@ MAKE_TARGETS		:= $(notdir $(patsubst %.c,%,$(SRCS)))
>   MAKE_TARGETS_OBJS_WO_COMPAT_16	:= $(addsuffix .o,$(MAKE_TARGETS))
>   MAKE_TARGETS		+= $(addsuffix _16,$(MAKE_TARGETS))
>
> -# XXX (garrcoop): This code should be put in question as it cannot be applied
> -# (no .h file, no TST_USE_NEWER64_SYSCALL def).
>   DEF_16			:= TST_USE_COMPAT16_SYSCALL
> -
> -ifneq ($(COMPAT_TST_16_H),1)
> -COMPAT_16_H		:= $(abs_srcdir)/../utils/compat_16.h
> -else
> -COMPAT_16_H     := $(abs_srcdir)/../utils/compat_tst_16.h
> -endif
> -
> -ifneq ($(wildcard $(COMPAT_16_H)),)
> -HAS_COMPAT_16		:= 1
> -
> -$(MAKE_TARGETS_OBJS_WO_COMPAT_16): $(COMPAT_16_H)
> -.INTERMEDIATE: $(MAKE_TARGETS_OBJS_WO_COMPAT_16)
> -
> -else
> -HAS_COMPAT_16		:= 0
> -endif
> -
>   %_16: CPPFLAGS += -D$(DEF_16)=1
> -# XXX (garrcoop): End section of code in question..
>
> -%_16.o: %.c $(COMPAT_16_H)
> +%_16.o: %.c
>   	$(COMPILE.c) $(OUTPUT_OPTION) $<