Re: building GNU gettext on AIX

[Arsen Arsenović]

Richard Biener <richard.guenther@gmail.com> writes:

> On Fri, Nov 17, 2023 at 12:13 AM Arsen Arsenović <arsen@aarsen.me> wrote:
>>
>>
>> Bruno Haible <bruno@clisp.org> writes:
>>
>> > Hi David,
>> >
>> >> the default, distributed libintl library will not allow GCC to be built
>> >> with NLS enabled.
>> >
>> > The problem is this configure test from gettext.m4
>> >
>> >   checking for GNU gettext in libintl... no
>> >
>> > It should say
>> >
>> >   checking for GNU gettext in libintl... yes
>> >
>> > I reproduce it with simple hello-world package, outside GCC.
>> >
>> > It tests whether a program that uses gettext() can be linked with
>> >   -lintl -liconv
>> > But now, on AIX, it needs to test whether such a program can be linked with
>> >   -lintl -liconv -lpthread
>> >
>> >> Were you suggesting that --enable-threads=isoc would work now or that it
>> >> would require further changes for a future release?
>> >
>> > It requires a change, effectively to do as if HAVE_PTHREAD_API is undefined
>> > if --enable-threads=isoc was provided.
>> >
>> > I can prepare a new gettext release that has both issues fixed:
>> >   - gettext.m4 that fixes the configure test and sets the variable LIBINTL
>> >     to "-Lsome/libdir -lintl -liconv -lpthread",
>> >   - mbrtowc.o and setlocale*.o that use mtx_* locks instead of pthread_*
>> >     mutexes when requested.
>> >
>> > But you then need to make up your mind w.r.t. what I wrote in the earlier
>> > mail.
>> >
>> >   * GCC can pass --enable-threads=isoc, to avoid the libpthread dependency
>> >     on AIX ≥ 7.2.
>>
>> Hmm, would that option work everywhere, though?  Or would we have to
>> wire up configury to detect which flag to use?  If so, what would it
>> look like.
>
> I'd highly recommend the in-tree gettext to be built with thread
> support _disabled_,
> only a static library built and never installed (but linked statically
> into the host
> binaries).
>
> So if --disable-threads (or how it is called) does not work you need
> to fix _that_.
> Likewise if --disable-shared doesn't work correctly on all platforms
> you have to fix
> that as well.

That seems like the best choice to me too (and I'm testing a patch that
does that currently).

> Richard.
>
>>
>> >   * Or GCC can (continue to?) use the variable LIBINTL. This will work on
>>
>> If you mean the one generated by gettext.m4/uninstalled-config.sh, it is
>> utilized today:
>>
>> LIBS = @LIBS@ libcommon.a $(CPPLIB) $(LIBINTL) $(LIBICONV) $(LIBBACKTRACE) \
>>         $(LIBIBERTY) $(LIBDECNUMBER) $(HOST_LIBS)
>>
>> (from gcc/Makefile.in)
>>
>>
>> >     AIX 7.1 as well but the programs will then be linked against 
>> > libpthread.
>> >     One additional library.
>> >     $ ldd gcc
>> >     /opt/freeware/bin/gcc needs:
>> >          /usr/lib/libc.a(shr.o)
>> >          /opt/freeware/lib/libiconv.a(libiconv.so.2)
>> >          /usr/lib/libc.a(_shr.o)
>> >          /unix
>> >          /usr/lib/libcrypt.a(shr.o)
>> >          /opt/freeware/lib/libgcc_s.a(shr.o)
>> >     libpthread.a will be added to this list.
>> >
>> >     ibm-clang links against libpthread.a as well:
>> >     $ ldd /opt/IBM/openxlC/17.1.1/bin/.ibm-clang.orig
>> >     /opt/IBM/openxlC/17.1.1/bin/.ibm-clang.orig needs:
>> >          /usr/lib/libpthreads.a(shr_xpg5_64.o)
>> >          /usr/opt/zlibNX/lib/libz.a(libz.so.1)
>> >          /usr/lib/libcurses.a(shr42_64.o)
>> >          /usr/lib/libiconv.a(shr4_64.o)
>> >          /usr/lib/libc++.a(shr_64.o)
>> >          /usr/lib/libc++abi.a(libc++abi.so.1)
>> >          /usr/lib/libc.a(shr_64.o)
>> >          /usr/lib/libpthreads.a(_shr_xpg5_64.o)
>> >          /usr/lib/libc++.a(libc++.so.1)
>> >          /usr/lib/libunwind.a(libunwind.so.1)
>> >          /usr/lib/libc.a(_shr_64.o)
>> >          /unix
>> >          /usr/lib/libcrypt.a(shr_64.o)
>>
>> David, I'll leave that decision up to you.
>>
>> > Bruno
>>
>>
>> --
>> Arsen Arsenović


-- 
Arsen Arsenović

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