13 uses of REQUIREMENT_WARNING

color_requirements in drupal/modules/color/color.install
Implements hook_requirements().
drupal_requirements_url in drupal/includes/install.inc
Returns a URL for proceeding to the next page after a requirements problem.
image_requirements in drupal/modules/image/image.install
Implements hook_requirements() to check the PHP GD Library.
install_verify_requirements in drupal/includes/install.core.inc
Verifies the requirements for installing Drupal.
openid_requirements in drupal/modules/openid/openid.install
Implements hook_requirements().
system_requirements in drupal/modules/system/system.install
Implements hook_requirements().
unicode_requirements in drupal/includes/unicode.inc
Returns Unicode library status and errors.
UpdateScriptFunctionalTest::testRequirements in drupal/modules/system/system.test
Tests that requirements warnings and errors are correctly displayed.
update_check_requirements in drupal/update.php
Checks update requirements and reports errors and (optionally) warnings.
update_init in drupal/modules/update/update.module
Implements hook_init().
update_requirements in drupal/modules/update/update.install
Implements hook_requirements().
update_script_test_requirements in drupal/modules/simpletest/tests/update_script_test.install
Implements hook_requirements().
_update_requirement_check in drupal/modules/update/update.install
Fills in the requirements array.