Re: GCC up to 2.95 can't build shared libraries on AIX 4.1

[Robert Boehne]

Looks good to me.

Robert

Alexandre Oliva wrote:
> 
> This patch arranges for shared libraries to be disabled on AIX 4.1 if
> a GCC version that is not a recent enough GCC snapshots is detected.
> This may be needed on AIX 4.2 too, but I don't have a machine to
> test.  Ok to install?  (I've got adjusted patches for MLB and 1.3)
> 
>   ------------------------------------------------------------------------
> Index: ChangeLog
> from  Alexandre Oliva  <address@hidden>
> 
>         * libtool.m4 (can_build_shared) [AIX 4.[01], GCC]: GCC up to
>         2.96 can't build shared libraries reliably.  Disable them.
> 
> Index: libtool.m4
> ===================================================================
> RCS file: /cvsroot/libtool/libtool/libtool.m4,v
> retrieving revision 1.143
> diff -u -p -r1.143 libtool.m4
> --- libtool.m4 2001/03/03 21:41:29 1.143
> +++ libtool.m4 2001/03/03 22:00:16
> @@ -1769,6 +1769,22 @@ aix4*)
>    # and later linker supports .so
>    library_names_spec='${libname}${release}.so$versuffix 
> ${libname}${release}.so$major $libname.a'
>    shlibpath_var=LIBPATH
> +  case $host_os in
> +[  aix4 | aix4.[01] | aix4.[01].*)]
> +    if { echo '#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 97)'
> +        echo ' yes '
> +        echo '#endif'; } | ${CC} -E - | grep yes > /dev/null; then
> +      :
> +    else
> +      # With GCC up to 2.95.x, collect2 would create an import file
> +      # for dependence libraries.  The import file would start with
> +      # the line `#! .'.  This would cause the generated library to
> +      # depend on `.', always an invalid library.  This was fixed in
> +      # development snapshots of GCC prior to 3.0.
> +      can_build_shared=no
> +    fi
> +    ;;
> +  esac
>    ;;
> 
>  amigaos*)
> 
>   ------------------------------------------------------------------------
> 
> --
> Alexandre Oliva   Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
> Red Hat GCC Developer                  address@hidden, redhat.com}
> CS PhD student at IC-Unicamp        address@hidden, gnu.org}
> Free Software Evangelist    *Please* write to mailing lists, not to me

-- 
Robert Boehne             Software Engineer
Ricardo Software   Chicago Technical Center
TEL: (630)789-0003 x. 238
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