6 uses of REQUIREMENT_WARNING in Drupal 6

install_check_requirements in ./install.php

Check installation requirements and report any errors.

system_requirements in modules/system/system.install

Implementation of hook_requirements().

unicode_requirements in includes/unicode.inc

Return Unicode library status and errors.

update_help in modules/update/update.module

Implementation of hook_help().

update_requirements in modules/update/update.module

Implementation of hook_requirements().

_update_requirement_check in modules/update/update.module

Private helper method to fill in the requirements array.