Hello Richard, sorry for the long delay. Apparently the 4.3.3 system has flaky hardware; anyway I don't trust its results any more.
I've now pushed your two proposed patches, added a small NEWS entry to the first, and added you to THANKS. Thanks again! Ralf 2009-06-06 Richard Sandiford <richa...@transitive.com> Build AIX shared libraries with binutils 2.19.50+. * libltdl/m4/libtool.m4 (_LT_LINKER_SHLIBS, _LT_LANG_CXX_CONFIG) <lt_use_gnu_ld_interface>: New variable to control whether the GNU ld or native ld interface is used. Set to "no" for GNU ld 2.19.50+ on AIX, otherwise mirror $with_gnu_ld. Update the warning message that is printed when using GNU ld on AIX. Adjust the whole_archive_flag_spec value for GNU ld on AIX. * NEWS, THANKS: Update. diff --git a/NEWS b/NEWS index 42d3c69..3656acd 100644 --- a/NEWS +++ b/NEWS @@ -20,6 +20,7 @@ New in 2.2.8 2009-??-??: git version 2.2.7a, Libtool team: - Support for GNU/kOpenSolaris (kopensolaris*-gnu). - Initial support for compilers on BlueGene BG/L. - Improved support for Atari FreeMiNT. + - With binutils 2.19.50+, shared libraries can be built on AIX. * Bug fixes: diff --git a/libltdl/m4/libtool.m4 b/libltdl/m4/libtool.m4 index 3596384..21db0b0 100644 --- a/libltdl/m4/libtool.m4 +++ b/libltdl/m4/libtool.m4 @@ -4208,7 +4208,33 @@ dnl Note also adjust exclude_expsyms for C++ above. esac _LT_TAGVAR(ld_shlibs, $1)=yes + + # On some targets, GNU ld is compatible enough with the native linker + # that we're better off using the native interface for both. + lt_use_gnu_ld_interface=no if test "$with_gnu_ld" = yes; then + case $host_os in + aix*) + # The AIX port of GNU ld has always aspired to compatibility + # with the native linker. However, as the warning in the GNU ld + # block says, versions before 2.19.5* couldn't really create working + # shared libraries, regardless of the interface used. + case `$LD -v 2>&1` in + *\ \(GNU\ Binutils\)\ 2.19.5*) ;; + *\ \(GNU\ Binutils\)\ 2.[[2-9]]*) ;; + *\ \(GNU\ Binutils\)\ [[3-9]]*) ;; + *) + lt_use_gnu_ld_interface=yes + ;; + esac + ;; + *) + lt_use_gnu_ld_interface=yes + ;; + esac + fi + + if test "$lt_use_gnu_ld_interface" = yes; then # If archive_cmds runs LD, not CC, wlarc should be empty wlarc='${wl}' @@ -4241,11 +4267,12 @@ dnl Note also adjust exclude_expsyms for C++ above. _LT_TAGVAR(ld_shlibs, $1)=no cat <<_LT_EOF 1>&2 -*** Warning: the GNU linker, at least up to release 2.9.1, is reported +*** Warning: the GNU linker, at least up to release 2.19, is reported *** to be unable to reliably create shared libraries on AIX. *** Therefore, libtool is disabling shared libraries support. If you -*** really care for shared libraries, you may want to modify your PATH -*** so that a non-GNU linker is found, and then restart. +*** really care for shared libraries, you may want to install binutils +*** 2.20 or above, or modify your PATH so that a non-GNU linker is found. +*** You will then need to restart the configuration process. _LT_EOF fi @@ -4605,8 +4632,13 @@ _LT_EOF # -berok will link without error, but may produce a broken library. _LT_TAGVAR(no_undefined_flag, $1)=' ${wl}-bernotok' _LT_TAGVAR(allow_undefined_flag, $1)=' ${wl}-berok' - # Exported symbols can be pulled into shared objects from archives - _LT_TAGVAR(whole_archive_flag_spec, $1)='$convenience' + if test "$with_gnu_ld" = yes; then + # We only use this code for GNU lds that support --whole-archive. + _LT_TAGVAR(whole_archive_flag_spec, $1)='${wl}--whole-archive$convenience ${wl}--no-whole-archive' + else + # Exported symbols can be pulled into shared objects from archives + _LT_TAGVAR(whole_archive_flag_spec, $1)='$convenience' + fi _LT_TAGVAR(archive_cmds_need_lc, $1)=yes # This is similar to how AIX traditionally builds its shared libraries. _LT_TAGVAR(archive_expsym_cmds, $1)="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs ${wl}-bnoentry $compiler_flags ${wl}-bE:$export_symbols${allow_undefined_flag}~$AR $AR_FLAGS $output_objdir/$libname$release.a $output_objdir/$soname' @@ -5546,8 +5578,13 @@ if test "$_lt_caught_CXX_error" != yes; then # -berok will link without error, but may produce a broken library. _LT_TAGVAR(no_undefined_flag, $1)=' ${wl}-bernotok' _LT_TAGVAR(allow_undefined_flag, $1)=' ${wl}-berok' - # Exported symbols can be pulled into shared objects from archives - _LT_TAGVAR(whole_archive_flag_spec, $1)='$convenience' + if test "$with_gnu_ld" = yes; then + # We only use this code for GNU lds that support --whole-archive. + _LT_TAGVAR(whole_archive_flag_spec, $1)='${wl}--whole-archive$convenience ${wl}--no-whole-archive' + else + # Exported symbols can be pulled into shared objects from archives + _LT_TAGVAR(whole_archive_flag_spec, $1)='$convenience' + fi _LT_TAGVAR(archive_cmds_need_lc, $1)=yes # This is similar to how AIX traditionally builds its shared # libraries. 2009-06-06 Richard Sandiford <richa...@transitive.com> Fix GNU nm invocation for AIX. * libldtl/m4/libtool.m4 (_LT_LINKER_SHLIBS) <export_symbols_cmds>: Modify the GNU-nm-on-AIX version so that it adds weak defined symbols to the export list. diff --git a/libltdl/m4/libtool.m4 b/libltdl/m4/libtool.m4 index 21db0b0..a7d9bf5 100644 --- a/libltdl/m4/libtool.m4 +++ b/libltdl/m4/libtool.m4 @@ -4129,8 +4129,10 @@ m4_if([$1], [CXX], [ aix[[4-9]]*) # If we're using GNU nm, then we don't want the "-C" option. # -C means demangle to AIX nm, but means don't demangle with GNU nm + # Also, AIX nm treats weak defined symbols like other global defined + # symbols, whereas GNU nm marks them as "W". if $NM -V 2>&1 | $GREP 'GNU' > /dev/null; then - _LT_TAGVAR(export_symbols_cmds, $1)='$NM -Bpg $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B")) && ([substr](\$ 3,1,1) != ".")) { print \$ 3 } }'\'' | sort -u > $export_symbols' + _LT_TAGVAR(export_symbols_cmds, $1)='$NM -Bpg $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B") || (\$ 2 == "W")) && ([substr](\$ 3,1,1) != ".")) { print \$ 3 } }'\'' | sort -u > $export_symbols' else _LT_TAGVAR(export_symbols_cmds, $1)='$NM -BCpg $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B")) && ([substr](\$ 3,1,1) != ".")) { print \$ 3 } }'\'' | sort -u > $export_symbols' fi @@ -4527,8 +4529,10 @@ _LT_EOF else # If we're using GNU nm, then we don't want the "-C" option. # -C means demangle to AIX nm, but means don't demangle with GNU nm + # Also, AIX nm treats weak defined symbols like other global + # defined symbols, whereas GNU nm marks them as "W". if $NM -V 2>&1 | $GREP 'GNU' > /dev/null; then - _LT_TAGVAR(export_symbols_cmds, $1)='$NM -Bpg $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B")) && ([substr](\$ 3,1,1) != ".")) { print \$ 3 } }'\'' | sort -u > $export_symbols' + _LT_TAGVAR(export_symbols_cmds, $1)='$NM -Bpg $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B") || (\$ 2 == "W")) && ([substr](\$ 3,1,1) != ".")) { print \$ 3 } }'\'' | sort -u > $export_symbols' else _LT_TAGVAR(export_symbols_cmds, $1)='$NM -BCpg $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B")) && ([substr](\$ 3,1,1) != ".")) { print \$ 3 } }'\'' | sort -u > $export_symbols' fi