AIX 4 libtool configuration

[David Edelsohn]

I have committed the following patches to improve libtool support for AIX
to build libstdc++-v3.

David


        * ltcf-c.sh (aix4): Improve shared library configuration; require
        exporting symbols.
        * ltcf-cxx.sh (aix4): Define.
        * ltconfig (aix4): Define library and soname specs appropriate for
        AIX.  Define command to create export symbols list.

Index: ltcf-c.sh
===================================================================
RCS file: /cvs/gcc/egcs/ltcf-c.sh,v
retrieving revision 1.3
diff -c -p -r1.3 ltcf-c.sh
*** ltcf-c.sh   2000/09/06 13:59:29     1.3
--- ltcf-c.sh   2000/11/09 21:33:43
*************** else
*** 277,289 ****
        hardcode_direct=yes
      fi
      allow_undefined_flag=' ${wl}-berok'
!     archive_cmds="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs 
$deplibs $compiler_flags ${wl}-bexpall ${wl}-bnoentry${allow_undefined_flag}'
!     archive_expsym_cmds="\$CC $shared_flag"' -o $output_objdir/$soname 
$libobjs $deplibs $compiler_flags ${wl}-bE:$export_symbols 
${wl}-bnoentry${allow_undefined_flag}'
!     case "$host_os" in aix4.[01]|aix4.[01].*)
!       # According to Greg Wooledge, -bexpall is only supported from AIX 4.2 on
!       always_export_symbols=yes ;;
!     esac
!    ;;
  
    amigaos*)
      archive_cmds='$rm $output_objdir/a2ixlibrary.data~$echo "#define NAME 
$libname" > $output_objdir/a2ixlibrary.data~$echo "#define LIBRARY_ID 1" >> 
$output_objdir/a2ixlibrary.data~$echo "#define VERSION $major" >> 
$output_objdir/a2ixlibrary.data~$echo "#define REVISION $revision" >> 
$output_objdir/a2ixlibrary.data~$AR $AR_FLAGS $lib $libobjs~$RANLIB $lib~(cd 
$output_objdir && a2ixlibrary -32)'
--- 277,289 ----
        hardcode_direct=yes
      fi
      allow_undefined_flag=' ${wl}-berok'
!     archive_expsym_cmds="\$CC $shared_flag"' -o $output_objdir/$soname 
$libobjs $deplibs $compiler_flags ${wl}-bE:$export_symbols 
${wl}-bnoentry${allow_undefined_flag}~$AR $AR_FLAGS 
$output_objdir/$libname$release.a $output_objdir/$soname'
!     # -bexpall does not export symbols beginning with underscore (_)
!     always_export_symbols=yes
!     # Exported symbols can be pulled into shared objects from archives
!     whole_archive_flag_spec=' '
!     build_libtool_need_lc=yes
!     ;;
  
    amigaos*)
      archive_cmds='$rm $output_objdir/a2ixlibrary.data~$echo "#define NAME 
$libname" > $output_objdir/a2ixlibrary.data~$echo "#define LIBRARY_ID 1" >> 
$output_objdir/a2ixlibrary.data~$echo "#define VERSION $major" >> 
$output_objdir/a2ixlibrary.data~$echo "#define REVISION $revision" >> 
$output_objdir/a2ixlibrary.data~$AR $AR_FLAGS $lib $libobjs~$RANLIB $lib~(cd 
$output_objdir && a2ixlibrary -32)'
Index: ltcf-cxx.sh
===================================================================
RCS file: /cvs/gcc/egcs/ltcf-cxx.sh,v
retrieving revision 1.4
diff -c -p -r1.4 ltcf-cxx.sh
*** ltcf-cxx.sh 2000/09/30 06:02:57     1.4
--- ltcf-cxx.sh 2000/11/09 21:33:43
*************** case "$host_os" in
*** 135,142 ****
      ld_shlibs=no
      ;;
    aix4*)
!     # FIXME: insert proper C++ library support
!     ld_shlibs=no
      ;;
    chorus*)
      case "$cc_basename" in
--- 135,146 ----
      ld_shlibs=no
      ;;
    aix4*)
!     archive_expsym_cmds="\$CC $shared_flag"' -o $output_objdir/$soname 
$libobjs $deplibs $compiler_flags ${wl}-bE:$export_symbols 
${wl}-bnoentry${allow_undefined_flag}~$AR $AR_FLAGS 
$output_objdir/$libname$release.a $output_objdir/$soname'
!     # -bexpall does not export symbols beginning with underscore (_)
!     always_export_symbols=yes
!     # Exported symbols can be pulled into shared objects from archives
!     whole_archive_flag_spec=' '
!     build_libtool_need_lc=yes
      ;;
    chorus*)
      case "$cc_basename" in
Index: ltconfig
===================================================================
RCS file: /cvs/gcc/egcs/ltconfig,v
retrieving revision 1.10
diff -c -p -r1.10 ltconfig
*** ltconfig    2000/09/30 06:02:57     1.10
--- ltconfig    2000/11/09 21:33:44
*************** aix4*)
*** 949,956 ****
    # collect2, so additional links can be useful in future.
    # We preserve .a as extension for shared libraries though AIX4.2
    # and later linker supports .so
!   library_names_spec='${libname}${release}.so$versuffix 
${libname}${release}.so$major $libname.a'
    shlibpath_var=LIBPATH
    ;;
  
  amigaos*)
--- 949,958 ----
    # collect2, so additional links can be useful in future.
    # We preserve .a as extension for shared libraries though AIX4.2
    # and later linker supports .so
!   library_names_spec='${libname}${release}.a $libname.a'
    shlibpath_var=LIBPATH
+   soname_spec='${libname}${release}.so$major.o'
+   export_symbols_cmds='$NM -BCpg $libobjs $convenience | awk '\''{ if (((\$2 
== "T") || (\$2 == "D") || (\$2 == "B")) && (substr(\$3,1,1) != ".")) { print 
\$3 } }'\'' | sort -u > $export_symbols'
    ;;
  
  amigaos*)