Re: PGI and C++ templates

[trs]

Ralf, Jeff, and everyone,

  We looked at what you did, and it appears you understand how
things were put together.

  However, the 6.0 release is about to come out, and
the template instantiation mechanism
has been totally rewritten for linux targets.  All of the
template related compiler switches will be deprecated:

        --one_instantiation_per_object
        --instantiation_dir
                --instantiate
                --[no_]auto_instantiation
        --prelink_objects
        -Wc,-tlocal
        -Wc,-tused
        -Wc,-tall



This new instantiation method uses the Gnu linker to resolve all
template references and discard the duplicates.  This new feature
is not compatible with previous releases.  Users will need to
recompile all C++ code, and modify the build tools that do a
prelink step.

In general, the compiler will simply ignore and give a warning
when these template switches are used.  Tools that attempt
to archive Template.dir/*.o will find that the directory
is no longer created by the compiler driver.

regards,
dave



> Sorry for the self-reply,
>
> * Ralf Wildenhues wrote on Mon, Mar 14, 2005 at 07:49:00PM CET:
>>
>> This is a status update on "libtool/pgi/C++ with templates".
>
> Now here's an improved patch against branch-2-0.  Should work for both
> static and shared uninstalled libraries plus programs linked against
> them, and seems to also work when relinking is required upon
> installation.  It works with the example Markus provided a while ago.
>
> Turns out pgCC is smart enough to recreate all that is needed with the
> correct PICness all by itself, so we don't even need to adjust
> Template.dir.  Nice compiler work!
>
> What's missing is correct `make clean'ing, which will be addressed later
> in reply to Jeff's macro.
>
> Testing would be *great*, as would be reviewing.
>
> Cheers,
> Ralf
>
>> ,-- ***experimental*** patch for PGI + templates ---
>>
>>      * m4/libtool.m4 (_LT_COMPILER_C_O): The compiler may create
>>      subdirectories which we have to remove here.
>>
>>      * m4/libtool.m4 (_LT_LINKER_SHLIBS): New TAGDECL $prelink_cmds
>>      intended for compilation of template instantiations for program
>>      outputs.
>>      * m4/libtool.m4 (_LT_LANG_CXX_CONFIG) [ linux ]: Enable template
>>      compilation for Portland pgCC in prelink_cmds and old_archive_cmds.
>>      * config/ltmain.m4sh (func_mode_link): execute $prelink_cmds if
>>      nonempty.
>
>
> Index: config/ltmain.m4sh
> ===================================================================
> RCS file: /cvsroot/libtool/libtool/config/ltmain.m4sh,v
> retrieving revision 1.1.2.47
> diff -u -r1.1.2.47 ltmain.m4sh
> --- config/ltmain.m4sh        12 Mar 2005 08:50:45 -0000      1.1.2.47
> +++ config/ltmain.m4sh        15 Mar 2005 16:55:37 -0000
> @@ -5530,6 +5530,18 @@
>
>        func_generate_dlsyms "$outputname" "@PROGRAM@" "no"
>
> +      # template prelinking step
> +      if test -n "$prelink_cmds"; then
> +     cmds=$prelink_cmds
> +     save_ifs="$IFS"; IFS='~'
> +     for cmd in $cmds; do
> +       IFS="$save_ifs"
> +       eval cmd=\"$cmd\"
> +       $show "$cmd"
> +       $run eval "$cmd"
> +       test $? -eq 0 || exit $?
> +     done
> +      fi
>
>        wrappers_required=yes
>        case $host in
> Index: m4/libtool.m4
> ===================================================================
> RCS file: /cvsroot/libtool/libtool/m4/libtool.m4,v
> retrieving revision 1.125.2.36
> diff -u -r1.125.2.36 libtool.m4
> --- m4/libtool.m4     14 Mar 2005 15:03:24 -0000      1.125.2.36
> +++ m4/libtool.m4     15 Mar 2005 16:55:37 -0000
> @@ -1482,7 +1482,7 @@
>     test -d out/ii_files && $RM out/ii_files/* && rmdir out/ii_files
>     $RM out/* && rmdir out
>     cd ..
> -   rmdir conftest
> +   $RM -r conftest
>     $RM conftest*
>  ])
>  _LT_TAGDECL([compiler_c_o], [lt_cv_prog_compiler_c_o], [1],
> @@ -3112,7 +3112,7 @@
>           _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
>           _LT_TAGVAR(lt_prog_compiler_static, $1)='-static'
>           ;;
> -       pgCC)
> +       pgCC*)
>           # Portland Group C++ compiler
>           _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
>           _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fpic'
> @@ -4468,6 +4468,8 @@
>      [Symbols that should not be listed in the preloaded symbols])
>  _LT_TAGDECL([], [include_expsyms], [1],
>      [Symbols that must always be exported])
> +_LT_TAGDECL([], [prelink_cmds], [2],
> +    [Commands necessary for linking programs (against libraries) with
> templates])
>  dnl FIXME: Not yet implemented
>  dnl _LT_TAGDECL([], [thread_safe_flag_spec], [1],
>  dnl    [Compiler flag to generate thread safe objects])
> @@ -5191,10 +5193,25 @@
>           _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}--export-dynamic'
>           _LT_TAGVAR(whole_archive_flag_spec,
> $1)='${wl}--whole-archive$convenience ${wl}--no-whole-archive'
>           ;;
> -          pgCC)
> +          pgCC*)
>              # Portland Group C++ compiler
> -            _LT_TAGVAR(archive_cmds, $1)='$CC -shared $predep_objects
> $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname
> ${wl}$soname -o $lib'
> -            _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared
> $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags
> ${wl}-soname ${wl}$soname ${wl}-retain-symbols-file ${wl}$export_symbols
> -o $lib'
> +         _LT_TAGVAR(prelink_cmds, $1)='tpldir=Template.dir~
> +           rm -rf $tpldir~
> +           $CC --prelink_objects --instantiation_dir $tpldir $objs $libobjs
> $compile_deplibs~
> +           compile_command="$compile_command `ls $tpldir/*.o 2>/dev/null | tr
> '"'\n' ' '"'`"'
> +            _LT_TAGVAR(old_archive_cmds, $1)='tpldir=Template.dir~
> +           rm -rf $tpldir~
> +           $CC --prelink_objects --instantiation_dir $tpldir
> $oldobjs$old_deplibs~
> +           $AR $AR_FLAGS $oldlib$oldobjs$old_deplibs `ls $tpldir/*.o
> 2>/dev/null | tr '"'\n' ' '"'`~
> +           $RANLIB $oldlib'
> +            _LT_TAGVAR(archive_cmds, $1)='tpldir=Template.dir~
> +           rm -rf $tpldir~
> +           $CC --prelink_objects --instantiation_dir $tpldir $predep_objects
> $libobjs $deplibs $postdep_objects~
> +           $CC -shared $predep_objects $libobjs $deplibs `ls $tpldir/*.o
> 2>/dev/null | tr '"'\n' ' '"'` $postdep_objects $compiler_flags
> ${wl}-soname ${wl}$soname -o $lib'
> +            _LT_TAGVAR(archive_expsym_cmds, $1)='tpldir=Template.dir~
> +           rm -rf $tpldir~
> +           $CC --prelink_objects --instantiation_dir $tpldir $predep_objects
> $libobjs $deplibs $postdep_objects~
> +           $CC -shared $predep_objects $libobjs $deplibs `ls $tpldir/*.o
> 2>/dev/null | tr '"'\n' ' '"'` $postdep_objects $compiler_flags
> ${wl}-soname ${wl}$soname ${wl}-retain-symbols-file ${wl}$export_symbols
> -o $lib'
>
>           _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}--rpath
> ${wl}$libdir'
>           _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}--export-dynamic'
>