---
name: "jocamlmktop"
section: "1"
platform: "linux"
package: "jocaml"
version: "4.01.0-3"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/jocamlmktop"
---

# jocamlmktop(1)

Building custom toplevel systems

## NAME

jocamlmktop - Building custom toplevel systems

## SYNOPSIS

**jocamlmktop** \[ **-v** \] \[ **-cclib** *libname* \] \[ **-ccopt** *option* \] \[ **-custom** \[ **-o** *exec-file* \] \[ **-I** *lib-dir* \] *filename ...*

## DESCRIPTION

The  [**jocamlmktop**(1)](/jocamlmktop/1.md) command builds JoCaml toplevels that contain user code preloaded at start-up. The  [**jocamlmktop**(1)](/jocamlmktop/1.md) command takes as argument a set of *x*.cmo and *x*.cma files, and links them with the object files that implement the JoCaml toplevel.  If the **-custom** flag is given, C object files and libraries (.o and .a files) can also be given on the command line and are linked in the resulting toplevel.

## OPTIONS

The following command-line options are recognized by  [**jocamlmktop**(1)](/jocamlmktop/1.md).

- **-v**

  Print the version number of the compiler.

- **-cclib -l***libname*

  Pass the  **-l***libname* option to the C linker when linking in \`\`custom runtime'' mode (see the corresponding option for [**jocamlc**(1)](/jocamlc/1.md).

- **-ccopt**

  Pass the given option to the C compiler and linker, when linking in \`\`custom runtime'' mode. See the corresponding option for [**jocamlc**(1)](/jocamlc/1.md).

- **-custom**

  Link in \`\`custom runtime'' mode. See the corresponding option for [**jocamlc**(1)](/jocamlc/1.md).

- **-I***directory*

  Add the given directory to the list of directories searched for compiled interface files (.cmo and .cma).

- **-o** *exec-file*

  Specify the name of the toplevel file produced by the linker. The default is is  **a.out**.

## SEE ALSO

[**jocamlc**(1)](/jocamlc/1.md).