[PATCH v2] configure.ac: remove unused checks

[Dmitry V. Levin]

On Wed, May 20, 2020 at 01:41:08AM +0100, Pierre Marsais wrote:
> Those unused configure.ac checks were found with the following commands:
> 
> $ ./bootstrap
> $ ./configure
> $ grep '^#undef HAVE' config.h.in | cut -d' ' -f2 | sort >in_configure
> $ find -iname '*.[ch]' -exec ifnames \{\} + | grep ^HAVE | \
>   cut -d' ' -f1 | sort >in_source
> $ comm -23 in_configure in_source | grep -vE '^HAVE_(UNION|STRUCT)'
> 
> * configure.ac (AC_CHECK_FUNCS): Remove utimensat, the last user was
> removed by commit 589cff6.  Remove strsignal, the last user was
> removed by commit 2c4fb90.
> (AC_CHECK_HEADERS): Remove sys/conf.h, the last user was removed by
> commit 811bda6.  Remove inttypes.h, the last user was removed by commit
> a6d91de.  Remove stropts.h, the last user was removed by commit a56a81c.
> (AC_CHECK_DECLS): remove P_PPID, P_PGID, P_SID, P_CID, P_UID, P_GID,
> P_ALL, and P_LWPID, the last user was removed by commit 7da9d19.  Add
> missing P_PIDFD.

Thanks.  Could you split "Add missing P_PIDFD" out of
"remove unused checks" change, please?


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