.. _set_custom_top_level_module:

set_custom_top_level_module
----------------------------

This Tcl command specifies the top-level C/C++ function.
The top-level function and all of its descendant functions will be compiled to hardware.
The top-level function can also be specified using a pragma (see :ref:`pragma_function_top`), 
but it cannot be specified using both the Tcl command and the pragma.


**Category**

HLS Constraints

**Value Type**

string

**Dependencies**

NONE

**Applicable Flows**

All devices and flows

**Test Status**

Actively in-use

**Examples**

    ``set_custom_top_level_module "foo"``

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