Properly define `COVERAGE` when code coverage is enabled via `meson`

diff --git a/meson/code-coverage/meson.build b/meson/code-coverage/meson.build
index 603dfc4341f95ea42e7e69e7ce553cdfec847c5d..0a21ef52660a1f0d0fcecef935859ad632a0ccc4 100644 (file)
--- a/meson/code-coverage/meson.build
+++ b/meson/code-coverage/meson.build
@@ -1,6 +1,8 @@
 coverage = get_option('b_coverage')
 
 if coverage
+  add_project_arguments('-DCOVERAGE', language: 'cpp')
+
   if get_option('buildtype') != 'debug'
     warning('Coverage is enabled, using `builtype=debug` would produce better reports')
   endif