Tk_InitStubs - initialize the Tk stubs mechanism
const char *
Tk_InitStubs(interp, version, exact)
- Tcl_Interp *interp (in)
- Tcl interpreter handle.
- char *version (in)
- A version string consisting of one or more decimal numbers separated by
- int exact (in)
- Non-zero means that only the particular Tk version specified by
version is acceptable. Zero means that versions newer than
version are also acceptable as long as they have the same major
version number as version.
The Tcl stubs mechanism defines a way to dynamically bind extensions to a
particular Tcl implementation at run time. the stubs mechanism requires no
changes to applications incorporating Tcl/Tk interpreters. Only developers
creating C-based Tcl/Tk extensions need to take steps to use the stubs
mechanism with their extensions. See the Tcl_InitStubs page for more
Enabling the stubs mechanism for a Tcl/Tk extension requires the
- Call Tcl_InitStubs in the extension before calling any other Tcl
- Call Tk_InitStubs if the extension before calling any other Tk
- Define the USE_TCL_STUBS and the USE_TK_STUBS symbols.
Typically, you would include the -DUSE_TCL_STUBS and the
-DUSE_TK_STUBS flags when compiling the extension.
- Link the extension with the Tcl and Tk stubs libraries instead of the
standard Tcl and Tk libraries. On Unix platforms, the library names are
libtclstub8.4.a and libtkstub8.4.a; on Windows platforms,
the library names are tclstub84.lib and tkstub84.lib. Adjust
the library names with appropriate version number but note that the
extension may only be used with versions of Tcl/Tk that have that version
number or higher.
Tk_InitStubs attempts to initialize the Tk stub table pointers and ensure
that the correct version of Tk is loaded. In addition to an interpreter
handle, it accepts as arguments a version number and a Boolean flag indicating
whether the extension requires an exact version match or not. If exact
is 0, then the extension is indicating that newer versions of Tk are
acceptable as long as they have the same major version number as
version; non-zero means that only the specified version is
acceptable. Tcl_InitStubs returns a string containing the actual
version of Tk satisfying the request, or NULL if the Tk version is not
acceptable, does not support the stubs mechanism, or any other error condition