Re: building GNU gettext on AIX

[Richard Biener <richard.guenther@gmail.com>]

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.

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