[LTP] [PATCH 1/1] compat_16: Define USE_LEGACY_COMPAT_16_H for legacy tests

[Petr Vorel]

> Hi Petr,

> On Wed, Jul 19, 2023 at 6:12 PM Petr Vorel <pvorel@suse.cz> wrote:

> > Hi Li,

> > ...
> > > I'm not sure here if we really need COMPAT_16_H for choosing two compat
> > > header file.
> > > As we already use hard code in C source file like #include "compat_16.h"
> > or
> > > "compat_tst_16.h",
> > > so compile with -I the header directory is enough I guess.

> > > Try this simple compat_16.mk, it at least works well on my side.
> > > Or, did I miss anything in the 16bit compilation?

> > I like this simplification.

> > Well, touch compat_16.h causes rebuilding tests which use compat_tst_16.h.
> > I don't mind that. But OTOH touch compat_tst_16.h does not trigger
> > rebuilding
> > tests which use compat_tst_16.h :( (tested on
> > testcases/kernel/syscalls/setregid). Could you please recheck that?


> Good point, I overlooked the prerequisite for the target build, so it needs
> adding back.

> But we don't have the necessary to keep INTERMEDIATE object syntax.

> Delete some lines based on your patch:

> --- a/testcases/kernel/syscalls/utils/compat_16.mk
> +++ b/testcases/kernel/syscalls/utils/compat_16.mk
> @@ -53,11 +53,8 @@ CPPFLAGS             += -I$(abs_srcdir)
> -I$(abs_srcdir)/../utils
>  SRCS                   ?= $(sort $(wildcard $(abs_srcdir)/*.c))

>  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

>  ifeq ($(USE_LEGACY_COMPAT_16_H),1)
> @@ -66,13 +63,7 @@ else
>  COMPAT_16_H     := $(abs_srcdir)/../utils/compat_tst_16.h
>  endif

> -ifneq ($(wildcard $(COMPAT_16_H)),)
> -$(MAKE_TARGETS_OBJS_WO_COMPAT_16): $(COMPAT_16_H)
> -.INTERMEDIATE: $(MAKE_TARGETS_OBJS_WO_COMPAT_16)
> -endif
> -
>  %_16: CPPFLAGS += -D$(DEF_16)=1
> -# XXX (garrcoop): End section of code in question..

>  %_16.o: %.c $(COMPAT_16_H)
>         $(COMPILE.c) $(OUTPUT_OPTION) $<

LGTM, would you mind to send it as a follow up to my patch, as an additional
cleanup?

Kind regards,
Petr