[librsvg: 1/6] CI: Pass C compiler flags for code coverage

[Federico Mena Quintero <federico src gnome org>]

commit d5c8e9d85a31ae73b50a366edbf6c3e51c39404c
Author: Federico Mena Quintero <federico gnome org>
Date:   Tue Jun 14 14:18:22 2022 -0500

    CI: Pass C compiler flags for code coverage
    
    Part-of: <https://gitlab.gnome.org/GNOME/librsvg/-/merge_requests/709>

 .gitlab-ci.yml | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 75bb40a3a..15caffe99 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -275,6 +275,7 @@ coverage:
     # see https://gitlab.gnome.org/GNOME/librsvg/-/issues/848
     - crun
   variables:
+    CFLAGS: "-coverage -ftest-coverage -fprofile-arcs"
     RUSTFLAGS: "-Zinstrument-coverage"
     RUSTDOCFLAGS: "-Zinstrument-coverage"
     LLVM_PROFILE_FILE: "coverage-profiles/coverage-%p-%m.profraw"