Define DEVELOPER_MODE in developer-mode builds

So that build-time consumers (e.g. feature-test) can detect developer
mode through a single dedicated symbol rather than proxying through
implementation-detail defines like ISC_MEM_TRACKLINES.

Assisted-by: Claude:claude-opus-4-7

diff --git a/meson.build b/meson.build
index 5e28e4175ba2e72965d5787126841d17ae103a67..6319ee066f963c045abcbdf7ce93c5dd632cec9a 100644 (file)
--- a/meson.build
+++ b/meson.build
@@ -330,6 +330,7 @@ if not cc.compiles(constexpr_test, name: 'usage of constexpr')
 endif
 
 if developer_mode
+    config.set('DEVELOPER_MODE', 1)
     config.set('ISC_LIST_CHECKINIT', 1)
     config.set('ISC_MEM_TRACKLINES', 1)
     config.set('ISC_MUTEX_ERROR_CHECK', 1)