* TODO: updated

* autogen: only libltdl needs autoheader
* doc/libtool.texi (link mode): documented -export-symbols-regex
  and updated -export-symbols
* doc/libtool.texi (script contents): documented
  always_export_symbols, export_symbols_cmd, exclude_expsyms,
  include_expsyms, dlopen and dlopen_self
  more detailed description of need_lib_prefix
* ltconfig.in: a "'" was missing in the default value
  of export_symbols_cmd
* ltmain.in: implemented -export-symbols-regex

ChangeLog

@@ -1,3 +1,17 @@
+1999-02-18  Thomas Tanner  <tanner@gmx.de>
+
+	* TODO: updated
+	* autogen: only libltdl needs autoheader 
+	* doc/libtool.texi (link mode): documented -export-symbols-regex
+	  and updated -export-symbols
+	* doc/libtool.texi (script contents): documented 
+	  always_export_symbols, export_symbols_cmd, exclude_expsyms, 
+	  include_expsyms, dlopen and dlopen_self
+	  more detailed description of need_lib_prefix
+	* ltconfig.in: a "'" was missing in the default value 
+	  of export_symbols_cmd
+	* ltmain.in: implemented -export-symbols-regex
+	
 1999-02-17  Alexandre Oliva  <oliva@dcc.unicamp.br>
 
 	* ltconfig.in: (freebsd2*, sunos4*, exclude_expsyms): exclude

TODO

@@ -35,6 +35,7 @@ this in the dso.5 page, this looks more informative :)
 * Inter-library dependencies should be fully tracked by libtool.
 Reminded by Alexandre Oliva.  This requires looking up installed
 libtool libraries for transparent support.
+Thomas Tanner has a patch for this.
 
 * Inter-library dependencies need to work for ltlibraries too.
 Thomas Tanner has a patch for this.
@@ -42,6 +43,7 @@ Thomas Tanner has a patch for this.
 * Alexandre Oliva suggests that we hardcode paths into libraries, as
 well as binaries:  `... -Wl,-soname -Wl,/tmp/libtest.so.0 ...'.  Tim
 Mooney wants the same thing.
+Thomas Tanner has a patch for this.
 
 * Tom Lane adds that HP-UX's linker, at least (I've also found this on
 AIX 4), distinguishes between global function and global variable
@@ -58,6 +60,9 @@ work under Solaris however.
 
 - libltdl documentation needs to be completed.
 
+- AC_PROG_LIBTOOL, AC_ENABLE/DISABLE_SHARED/STATIC, AC_LIBTOOL_DLOPEN
+  are not documented.
+
 In the future:
 **************
 

autogen

@@ -19,7 +19,7 @@ for sub in demo depdemo libltdl mdemo cdemo; do
   rm -f acinclude.m4
   cp ../libtool.m4 acinclude.m4
   aclocal
-  autoheader
+  test "$sub" = libltdl && autoheader
   automake --gnits --add-missing
   autoconf
   cd ..

doc/libtool.texi

@@ -1163,8 +1163,12 @@ Allow symbols from @var{output-file} to be resolved with @code{dlsym}
 @item -export-symbols @var{symfile}
 Tells the linker to export only the symbols listed in @var{symfile}. 
 The symbol file should end in @samp{.sym} and must contain the name of one 
-symbol per line. This option does not work for modules and is not
+symbol per line. This option has no effect on some platforms.
-supported on all platforms.
+By default all symbols are exported.
+
+@item -export-symbols-regex @var{regex}
+Same as @samp{-export-symbols}, except that only symbols matching
+the regular expression @var{regex} are exported.
 By default all symbols are exported.
 
 @item -L@var{libdir}
@@ -3376,6 +3380,12 @@ is no way to generate a shared library with references to symbols that
 aren't defined in that library.
 @end defvar
 
+@defvar always_export_symbols
+Whether libtool should automatically generate a list of exported symbols
+using @var{export_symbols_cmd} before linking an archive.
+Set to @samp{yes} or @samp{no}.  Default is @samp{no}
+@end defvar
+
 @defvar archive_cmds
 @defvarx archive_expsym_cmds
 @defvarx old_archive_cmds
@@ -3411,16 +3421,35 @@ i.e whether object files do not have to have the suffix ".o".
 Set to @samp{yes} or @samp{no}.
 @end defvar
 
+@defvar dlopen
+Whether @code{dlopen} is supported on the platform.
+Set to @samp{yes} or @samp{no}.
+@end defvar
+
+@defvar dlopen_self
+Whether it is possible to @code{dlopen} the executable itself.
+Set to @samp{yes} or @samp{no}.
+@end defvar
+
 @defvar echo
 An @code{echo} program which does not interpret backslashes as an
 escape character.
 @end defvar
 
+@defvar exclude_expsyms
+List of symbols that should not be listed in the preloaded symbols.
+@end defvar
+
 @defvar export_dynamic_flag_spec
 Compiler link flag that allows a dlopened shared library to reference
 symbols that are defined in the program.
 @end defvar
 
+@defvar export_symbols_cmd
+Command to extract exported symbols from @var{libobjs} to the
+file @var{export_symbols}.
+@end defvar
+
 @defvar finish_cmds
 Commands to tell the dynamic linker how to find shared libraries in a
 specific directory.
@@ -3491,6 +3520,10 @@ For information purposes, set to the specified and canonical names of
 the system that libtool was configured for.
 @end defvar
 
+@defvar include_expsyms
+List of symbols that must always be exported when using @var{export_symbols}.
+@end defvar
+
 @defvar libext
 The standard old archive suffix (normally "a").
 @end defvar
@@ -3517,6 +3550,9 @@ Whether libtool should automatically prefix module names with 'lib'.
 Set to @samp{yes} or @samp{no}.  By default, it is @samp{unknown}, which 
 means the same as @samp{yes}, but documents that we are not really sure
 about it.
+@samp{yes} means that it is possible both to @code{dlopen} and to
+link against a library wihthout 'lib' prefix,
+i.e. it requires @var{hardcode_direct} to be @samp{yes}.
 @end defvar
 
 @defvar need_version

ltconfig.in

@@ -1022,7 +1022,7 @@ hardcode_minus_L=no
 hardcode_shlibpath_var=unsupported
 runpath_var=
 always_export_symbols=no
-export_symbols_cmd="$NM $libobjs | $global_symbol_pipe | sed '\''s/.* //'\' | sort | uniq > $export_symbols"
+export_symbols_cmd='$NM $libobjs | $global_symbol_pipe | sed '\''s/.* //'\'' | sort | uniq > $export_symbols'
 # include_expsyms should be a list of space-separated symbols to be *always*
 # included in the symbol list
 include_expsyms=

ltmain.in

@@ -672,6 +672,7 @@ compiler."
     dlprefiles=
     export_dynamic=no
     export_symbols=
+    export_symbols_regex=
     generated=
     hardcode_libdirs=
     finalize_hardcode_libdirs=
@@ -741,7 +742,7 @@ compiler."
 	    ;;
 	  esac
 	  ;;
-	exportsyms)
+	expsyms)
 	  export_symbols="$arg"
 	  if test ! -f "$arg"; then
 	    $echo "$modename: symbol file \`$arg' does not exist"
@@ -750,6 +751,11 @@ compiler."
 	  prev=
 	  continue
 	  ;;
+	expsyms_regex)
+	  export_symbols_regex="$arg"
+	  prev=
+	  continue
+	  ;;
 	release)
 	  release="-$arg"
 	  prev=
@@ -822,12 +828,16 @@ compiler."
 	fi
 	;;
 
-      -export-symbols)
+      -export-symbols | -export-symbols-regex)
-	if test -n "$export_symbols"; then
+	if test -n "$export_symbols" || test -n "$export_symbols_regex"; then
 	  $echo "$modename: cannot have more than one -exported-symbols"
 	  exit 1
 	fi
-	prev=exportsyms
+	if test "$arg" = "-export-symbols"; then
+	  prev=expsyms
+	else
+	  prev=expsyms_regex
+	fi
 	continue
 	;;
 
@@ -1859,13 +1869,20 @@ EOF
 	fi
         
 	# Prepare the list of exported symbols
-	if test "$always_export_symbols" = yes && test -z "$export_symbols"; then
+	if test -z "$run" && test -z "$export_symbols"; then
-	  export_symbols="$objdir/$libname.exp"
+	  if test "$always_export_symbols" = yes || test -n "$export_symbols_regex"; then
-	  $run $rm $export_symbols
+	    export_symbols="$objdir/$libname.exp"
-	  $run eval "$export_symbols_cmd"
+	    $rm $export_symbols
+	    eval cmd=\"$export_symbols_cmd\"
+	    eval "$cmd"
+	    if test -n "$export_symbols_regex"; then
+	      egrep -e "$export_symbols_regex" "$export_symbols" > "$export_symbols"T
+	      $mv "$export_symbols"T "$export_symbols"
+	    fi
+	  fi
 	fi
 	if test -n "$include_expsyms"; then
-	  $run $echo "X$include_expsyms" | $SP2NL >> $export_symbols
+	  $run $echo "X$include_expsyms" | $SP2NL >> "$export_symbols"
 	fi
 
 	# Do each of the archive commands.