---
name: "Tcl_OOInitStubs"
section: "3"
platform: "linux"
package: "tcl"
version: "8.6.16-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/Tcl_OOInitStubs"
---

# Tcl\_OOInitStubs(3)

initialize library access to TclOO functionality

```

```

## NAME

Tcl\_OOInitStubs - initialize library access to TclOO functionality

## SYNOPSIS

```
#include <tclOO.h>

const char *
Tcl_OOInitStubs(interp)
```

## ARGUMENTS

- Tcl\_Interp *\*interp* (in)

  The Tcl interpreter that the TclOO API is integrated with and whose C interface is going to be used.

  ```

  ```

## DESCRIPTION

When an extension library is going to use the C interface exposed by TclOO, it should use **Tcl\_OOInitStubs** to initialize its access to that interface from within its *\****\_Init** (or *\****\_SafeInit**) function, passing in the *interp* that was passed into that routine as context. If the result of calling **Tcl\_OOInitStubs** is NULL, the initialization failed and an error message will have been left in the interpreter's result. Otherwise, the initialization succeeded and the TclOO API may thereafter be used; the version of the TclOO API is returned.

When using this function, either the C #define symbol **USE\_TCLOO\_STUBS** should be defined and your library code linked against the Tcl stub library, or that #define symbol should *not* be defined and your library code linked against the Tcl main library directly.

## BACKWARD COMPATIBILITY NOTE

If you are linking against the Tcl 8.5 forward compatibility package for TclOO, *only* the stub-enabled configuration is supported and you should also link against the TclOO independent stub library; that library is an integrated part of the main Tcl stub library in Tcl 8.6.

## KEYWORDS

stubs

## SEE ALSO

[Tcl\_InitStubs(3)](/Tcl_InitStubs/3.md)