[#llvm-TableGenMain-00]
= xref:llvm.adoc[llvm]::TableGenMain
:relfileprefix: ../
:mrdocs:

Run TableGen with a single‐file backend callback.

== Synopsis

Declared in `<llvm/TableGen/Main.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
TableGenMain(
    char const* argv0,
    xref:llvm/TableGenMainFn.adoc[TableGenMainFn] MainFn = nullptr);
----

== Description

Parses the input TableGen file, invokes `MainFn` (or a registered emitter), and writes the generated output.

== Return Value

Non‐zero status on error, zero on success.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *argv0*
| Program name used when reporting errors.
| *MainFn*
| Optional callback that writes one output file from Records.
|===


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