[LTP] 回复：[PATCH v1] include/mk/env_post.mk: enable __ANDROID__ definition for Android build

[Petr Vorel]

Hi Sandeep, Zhengwang,

> > I don't know why autotools fails preadv and pwritev detection with AC_CHECK_FUNCS.
> > I considered it as problem of my setup, but maybe it's an autotools bug.

> I also encountered this issue, but I temporarily walked around it by
> applying the following patch.

> ==================

> $ git diff testcases/
> diff --git a/testcases/commands/ldd/datafiles/Makefile
> b/testcases/commands/ldd/datafiles/Makefile
> index d8bcf5c..74fbe50 100644
> --- a/testcases/commands/ldd/datafiles/Makefile
> +++ b/testcases/commands/ldd/datafiles/Makefile
> @@ -30,7 +30,7 @@ CLEAN_TARGETS         += *.obj $(LDD_SO_FILES)
>         $(CC) $(CFLAGS) -shared -o $@ $^

>  lddfile.out: main.o $(LDD_SO_FILES)
> -       $(CC) $(CFLAGS) -O -o $@ $?
> +       $(CC) $(CFLAGS) $(LDFLAGS) -O -o $@ $?
What is this change for?

>  INSTALL_DIR            := testcases/data/ldd01

> diff --git a/testcases/kernel/syscalls/Makefile
> b/testcases/kernel/syscalls/Makefile
> index 45a00cf..27c2e7a 100644
> --- a/testcases/kernel/syscalls/Makefile
> +++ b/testcases/kernel/syscalls/Makefile
> @@ -43,6 +43,8 @@ FILTER_OUT_DIRS       += \
>         sched_getaffinity sched_setaffinity sendmsg setgroups setns sighold
> \
>         sigrelse sigsuspend sigtimedwait sigwait sigwaitinfo stime \
>         setdomainname sethostname symlinkat ulimit ustat vfork vhangup
> vmsplice
> +
> +FILTER_OUT_DIRS += preadv pwritev
Yes, that fixes build. But manually disabling features in config.h enables these
tests to be build.

Kind regards,
Petr