spiegel-keyman/core/docs/api/building.md
2026-05-06 13:28:03 +02:00

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---
title: How to build Keyman Core
---
<!-- generated by core/tools/api-header-extractor from core/include/keyman/*.h on 2026-05-06 -->
## Prerequisites
### To build
* Python 3
* Meson build system.
* C++17 or later compiler.
### Optional
* [kmc](https://keyman.com/developer/download) (for testing)
## Installing Python3
### Linux
You will be able to install a python3 package in any reputable recent version of
linux using its package manager if it's not already installed.
### macOS
You can get the official installer from the official Python site:
[https://www.python.org/downloads/mac-osx](https://www.python.org/downloads/mac-osx/)
### Windows
You can get the official installer from the official Python site:
[https://www.python.org/downloads/windows](https://www.python.org/downloads/windows/)
## Installing Meson
Ensure you have Python3 correctly installed and can run the command `pip3`.
$> python3 -m pip install meson
## Building
In your source directory do the following:
$> cd core
$> ./build.sh configure build test
## Note on kmc
kmc is node.js-based the command-line compiler from Keyman Developer, available
from [keyman.com](https://keyman.com/developer/) or on npm at
[@keymanapp/kmc](https://npmjs.com/package/@keymanapp/kmc).
### Windows
The search path can be edited through System settings / Advanced system settings
/ Environment Variables / User environment variables.
If you have Keyman Developer installed, kmc should already be on your path.
Otherwise, add the path where you extracted the kmcomp archive.
### Linux & MacOS
Install kmc from the NPM package.
[km_core_cu]: background#km_core_cu "km_core_cu type"
[km_core_usv]: background#km_core_usv "km_core_usv type"
[km_core_virtual_key]: background#km_core_virtual_key "km_core_virtual_key type"
[km_core_status]: background#km_core_status "km_core_status type"
[km_core_keyboard]: background#km_core_keyboard "km_core_keyboard struct"
[km_core_state]: background#km_core_state "km_core_state struct"
[km_core_options]: background#km_core_options "km_core_options struct"
[km_core_keyboard_imx_platform]: background#km_core_keyboard_imx_platform "km_core_keyboard_imx_platform callback function"
[km_core_status_codes]: background#km_core_status_codes "km_core_status_codes enum"
[km_core_attr]: background#km_core_attr "km_core_attr struct"
[km_core_tech_value]: background#km_core_tech_value "km_core_tech_value enum"
[km_core_get_engine_attrs]: background#km_core_get_engine_attrs "km_core_get_engine_attrs function"
[km_core_bool]: background#km_core_bool "km_core_bool enum"
[km_core_caps_state]: state#km_core_caps_state "km_core_caps_state enum"
[km_core_actions]: state#km_core_actions "km_core_actions struct"
[km_core_state_get_actions]: state#km_core_state_get_actions "km_core_state_get_actions function"
[km_core_context_status]: state#km_core_context_status "km_core_context_status enum"
[km_core_state_context_set_if_needed]: state#km_core_state_context_set_if_needed "km_core_state_context_set_if_needed function"
[km_core_state_context_clear]: state#km_core_state_context_clear "km_core_state_context_clear function"
[km_core_option_scope]: options#km_core_option_scope "km_core_option_scope enum"
[km_core_option_item]: options#km_core_option_item "km_core_option_item struct"
[km_core_options_list_size]: options#km_core_options_list_size "km_core_options_list_size function"
[km_core_state_option_lookup]: options#km_core_state_option_lookup "km_core_state_option_lookup function"
[km_core_state_options_update]: options#km_core_state_options_update "km_core_state_options_update function"
[km_core_keyboard_attrs]: keyboards#km_core_keyboard_attrs "km_core_keyboard_attrs struct"
[km_core_keyboard_key]: keyboards#km_core_keyboard_key "km_core_keyboard_key struct"
[km_core_keyboard_imx]: keyboards#km_core_keyboard_imx "km_core_keyboard_imx struct"
[km_core_keyboard_load_from_blob]: keyboards#km_core_keyboard_load_from_blob "km_core_keyboard_load_from_blob function"
[km_core_keyboard_dispose]: keyboards#km_core_keyboard_dispose "km_core_keyboard_dispose function"
[km_core_keyboard_get_attrs]: keyboards#km_core_keyboard_get_attrs "km_core_keyboard_get_attrs function"
[km_core_keyboard_get_key_list]: keyboards#km_core_keyboard_get_key_list "km_core_keyboard_get_key_list function"
[km_core_keyboard_key_list_dispose]: keyboards#km_core_keyboard_key_list_dispose "km_core_keyboard_key_list_dispose function"
[km_core_keyboard_get_imx_list]: keyboards#km_core_keyboard_get_imx_list "km_core_keyboard_get_imx_list function"
[km_core_keyboard_imx_list_dispose]: keyboards#km_core_keyboard_imx_list_dispose "km_core_keyboard_imx_list_dispose function"
[km_core_state_imx_register_callback]: keyboards#km_core_state_imx_register_callback "km_core_state_imx_register_callback function"
[km_core_state_imx_deregister_callback]: keyboards#km_core_state_imx_deregister_callback "km_core_state_imx_deregister_callback function"
[km_core_state_create]: keyboards#km_core_state_create "km_core_state_create function"
[km_core_state_clone]: keyboards#km_core_state_clone "km_core_state_clone function"
[km_core_state_dispose]: keyboards#km_core_state_dispose "km_core_state_dispose function"
[km_core_debug_context_type]: keyboards#km_core_debug_context_type "km_core_debug_context_type enum"
[km_core_state_context_debug]: keyboards#km_core_state_context_debug "km_core_state_context_debug function"
[km_core_cu_dispose]: keyboards#km_core_cu_dispose "km_core_cu_dispose function"
[km_core_event_flags]: processor#km_core_event_flags "km_core_event_flags enum"
[km_core_process_event]: processor#km_core_process_event "km_core_process_event function"
[km_core_event]: processor#km_core_event "km_core_event function"
[km_core_event_code]: processor#km_core_event_code "km_core_event_code enum"
[km_core_action_item]: actions#km_core_action_item "km_core_action_item struct"
[km_core_state_action_items]: actions#km_core_state_action_items "km_core_state_action_items function"
[km_core_state_queue_action_items]: actions#km_core_state_queue_action_items "km_core_state_queue_action_items function"
[km_core_process_queued_actions]: actions#km_core_process_queued_actions "km_core_process_queued_actions function"
[km_core_context_type]: context#km_core_context_type "km_core_context_type enum"
[km_core_context_item]: context#km_core_context_item "km_core_context_item struct"
[KM_CORE_CONTEXT_ITEM_END]: context#KM_CORE_CONTEXT_ITEM_END "KM_CORE_CONTEXT_ITEM_END macro"
[km_core_state_get_intermediate_context]: context#km_core_state_get_intermediate_context "km_core_state_get_intermediate_context function"
[km_core_context_items_dispose]: context#km_core_context_items_dispose "km_core_context_items_dispose function"
[km_core_state_context]: context#km_core_state_context "km_core_state_context function"
[km_core_state_app_context]: context#km_core_state_app_context "km_core_state_app_context function"
[km_core_context_set]: context#km_core_context_set "km_core_context_set function"
[km_core_context_clear]: context#km_core_context_clear "km_core_context_clear function"
[km_core_context_item_list_size]: context#km_core_context_item_list_size "km_core_context_item_list_size function"
[km_core_context_get]: context#km_core_context_get "km_core_context_get function"
[km_core_context_length]: context#km_core_context_length "km_core_context_length function"
[km_core_modifier_state]: virtual-keys#km_core_modifier_state "km_core_modifier_state enum"
[km_core_modifier_mask]: virtual-keys#km_core_modifier_mask "km_core_modifier_mask "
[km_core_virtual_key_value]: virtual-keys#km_core_virtual_key_value "km_core_virtual_key_value "