patch 7.4.1070

Problem:    The Tcl interface can't be loaded dynamically on Unix.
Solution:   Make it possible to load it dynamically. (Ken Takata)

runtime/doc/if_tcl.txt

@@ -515,12 +515,15 @@ startup file (usually "~/.vimrc" on Unix):
 ==============================================================================
 9. Dynamic loading					*tcl-dynamic*
 
-On MS-Windows the Tcl library can be loaded dynamically.  The |:version|
-output then includes |+tcl/dyn|.
+On MS-Windows and Unix the Tcl library can be loaded dynamically.  The
+|:version| output then includes |+tcl/dyn|.
 
-This means that Vim will search for the Tcl DLL file only when needed.  When
-you don't use the Tcl interface you don't need it, thus you can use Vim
-without this DLL file.
+This means that Vim will search for the Tcl DLL or shared library file only
+when needed.  When you don't use the Tcl interface you don't need it, thus you
+can use Vim without this file.
+
+
+MS-Windows ~
 
 To use the Tcl interface the Tcl DLL must be in your search path.  In a
 console window type "path" to see what directories are used.
@@ -529,5 +532,12 @@ The name of the DLL must match the Tcl version Vim was compiled with.
 Currently the name is "tcl86.dll".  That is for Tcl 8.6.  To know for sure
 edit "gvim.exe" and search for "tcl\d*.dll\c".
 
+
+Unix ~
+
+The 'tcldll' option can be used to specify the Tcl shared library file instead
+of DYNAMIC_TCL_DLL file what was specified at compile time.  The version of
+the shared library must match the Tcl version Vim was compiled with.
+
 ==============================================================================
  vim:tw=78:ts=8:ft=help:norl:

runtime/doc/options.txt

@@ -7437,6 +7437,17 @@ A jump table for the options with a short description can be found at |Q_op|.
 	Resetting this option is useful when using a ":tag" command in a
 	mapping which should not change the tagstack.
 
+						*'tcldll'*
+'tcldll' 		string	(default depends on the build)
+			global
+			{not in Vi}
+			{only available when compiled with the |+tcl/dyn|
+			feature}
+	Specifies the name of the Tcl shared library. The default is
+	DYNAMIC_TCL_DLL, which was specified at compile time.
+	This option cannot be set from a |modeline| or in the |sandbox|, for
+	security reasons.
+
 						*'term'* *E529* *E530* *E531*
 'term'			string	(default is $TERM, if that fails:
 				      in the GUI: "builtin_gui"

runtime/doc/quickref.txt

@@ -909,6 +909,7 @@ Short explanation of each option:		*option-list*
 'tagrelative'	  'tr'	    file names in tag file are relative
 'tags'		  'tag'     list of file names used by the tag command
 'tagstack'	  'tgst'    push tags onto the tag stack
+'tcldll'		    name of the Tcl dynamic library
 'term'			    name of the terminal
 'termbidi'	  'tbidi'   terminal takes care of bi-directionality
 'termencoding'	  'tenc'    character encoding used by the terminal

runtime/optwin.vim

@@ -1331,6 +1331,10 @@ if exists("&rubydll")
   call append("$", "rubydll\tname of the Ruby dynamic library")
   call <SID>OptionG("rubydll", &rubydll)
 endif
+if exists("&tcldll")
+  call append("$", "tcldll\tname of the Tcl dynamic library")
+  call <SID>OptionG("tcldll", &tcldll)
+endif
 
 set cpo&vim