On Sun, Jul 02, 2006 at 10:58:23PM +0900, Peter O'Gorman wrote:
> On Tue, 2006-06-20 at 12:12 -0500, Albert Chin wrote:
>
> Albert also questioned the documentation:
>
> > On some operating systems, a program symbol must be specially
> > declared
> > in order to be dynamically resolved with the `dlsym' (or equivalent)
> > function.
> >
> > Libtool provides the `-export-dynamic' and `-module' link flags
> > (*note Link mode::), which do this declaration. You need to use
> > these
> > flags if you are linking an application program that dlopens other
> > modules or a libtool library that will also be dlopened.
> >
> > Should the last sentence above end with ", respectively"?
>
> I think this is a documentation bug. -export-dynamic does not imply
> -module, there is a line of code in ltmain that adds dlname to the .la
> file if either -module or -export-dynamic was specified, but this only
> "works" if modules and libraries are otherwise equivalent, so it should
> probably be removed and the documentation adjusted for HEAD, thoughts?
> Either way this patch does not affect that behavior at all.
>
> Here are patches against branch-1-5 and HEAD, okay (with apropriate
> ChangeLog, of course)?
Another version. Patch against branch-1-5 only. I've reordered where
--export-dynamic occurs so we don't have to worry about the above.
--
albert chin ([EMAIL PROTECTED])
Index: libtool.m4
===
RCS file: /cvsroot/libtool/libtool/Attic/libtool.m4,v
retrieving revision 1.314.2.162
diff -u -p -r1.314.2.162 libtool.m4
--- libtool.m4 3 Aug 2006 14:31:47 - 1.314.2.162
+++ libtool.m4 8 Aug 2006 13:16:45 -
@@ -2911,6 +2911,13 @@ case $host_os in
exp_sym_flag='-bexport'
no_entry_flag='-bnoentry'
+
+ if $NM -V 2>&1 | grep 'GNU' > /dev/null; then
+ _LT_AC_TAGVAR(export_dynamic_symbols_cmds, $1)='$NM -Bpg $objs $libobjs
$old_deplibs $old_convenience | awk '\''{ if (((\[$]2 == "T") || (\[$]2 == "D")
|| (\[$]2 == "B")) && ([substr](\[$]3,1,1) != ".")) { print \[$]3 } }'\'' |
sort -u > $export_symbols'
+ else
+ _LT_AC_TAGVAR(export_dynamic_symbols_cmds, $1)='$NM -BCpg $objs
$libobjs $old_deplibs $old_convenience | awk '\''{ if (((\[$]2 == "T") ||
(\[$]2 == "D") || (\[$]2 == "B")) && ([substr](\[$]3,1,1) != ".")) { print
\[$]3 } }'\'' | sort -u > $export_symbols'
+ fi
+ _LT_AC_TAGVAR(export_dynamic_flag_spec,
$1)="\${wl}$exp_sym_flag:\$export_symbols"
fi
# When large executables or shared objects are built, AIX ld can
@@ -3974,6 +3981,7 @@ _LT_AC_TAGVAR(archive_cmds_need_lc, $1)=
_LT_AC_TAGVAR(allow_undefined_flag, $1)=
_LT_AC_TAGVAR(always_export_symbols, $1)=no
_LT_AC_TAGVAR(archive_expsym_cmds, $1)=
+_LT_AC_TAGVAR(export_dynamic_symbols_cmds, $1)=
_LT_AC_TAGVAR(export_dynamic_flag_spec, $1)=
_LT_AC_TAGVAR(hardcode_direct, $1)=no
_LT_AC_TAGVAR(hardcode_libdir_flag_spec, $1)=
@@ -4209,6 +4217,7 @@ if test -f "$ltmain"; then
_LT_AC_TAGVAR(lt_prog_compiler_pic, $1) \
_LT_AC_TAGVAR(lt_prog_compiler_static, $1) \
_LT_AC_TAGVAR(lt_prog_compiler_no_builtin_flag, $1) \
+_LT_AC_TAGVAR(export_dynamic_symbols_cmds, $1) \
_LT_AC_TAGVAR(export_dynamic_flag_spec, $1) \
_LT_AC_TAGVAR(thread_safe_flag_spec, $1) \
_LT_AC_TAGVAR(whole_archive_flag_spec, $1) \
@@ -4243,6 +4252,7 @@ if test -f "$ltmain"; then
_LT_AC_TAGVAR(old_archive_from_new_cmds, $1) | \
_LT_AC_TAGVAR(archive_cmds, $1) | \
_LT_AC_TAGVAR(archive_expsym_cmds, $1) | \
+_LT_AC_TAGVAR(export_dynamic_symbols_cmds, $1) | \
_LT_AC_TAGVAR(module_cmds, $1) | \
_LT_AC_TAGVAR(module_expsym_cmds, $1) | \
_LT_AC_TAGVAR(old_archive_from_expsyms_cmds, $1) | \
@@ -4455,6 +4465,7 @@ link_static_flag=$lt_[]_LT_AC_TAGVAR(lt_
no_builtin_flag=$lt_[]_LT_AC_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)
# Compiler flag to allow reflexive dlopens.
+export_dynamic_symbols_cmds=$lt_[]_LT_AC_TAGVAR(export_dynamic_symbols_cmds,
$1)
export_dynamic_flag_spec=$lt_[]_LT_AC_TAGVAR(export_dynamic_flag_spec, $1)
# Compiler flag to generate shared objects directly from archives.
@@ -5480,6 +5491,7 @@ ifelse([$1],[CXX],[
_LT_AC_TAGVAR(archive_expsym_cmds, $1)=
_LT_AC_TAGVAR(old_archive_From_new_cmds, $1)=
_LT_AC_TAGVAR(old_archive_from_expsyms_cmds, $1)=
+ _LT_AC_TAGVAR(export_dynamic_symbols_cmds, $1)=
_LT_AC_TAGVAR(export_dynamic_flag_spec, $1)=
_LT_AC_TAGVAR(whole_archive_flag_spec, $1)=
_LT_AC_TAGVAR(thread_safe_flag_spec, $1)=
@@ -5788,8 +5800,11 @@ _LT_EOF
# -C means demangle to AIX nm, but means don't demangle with GNU nm
if $NM -V 2>&1 | grep 'GNU' > /dev/null; then
_LT_AC_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_AC_TAGVAR(export_dyna
