ci: Add -Wl,--no-undefined to CFLAGS

I believe this is the real cause of failures on debian, so add
it to the CI builds.

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 5dfe281abe5216bdd43ce05520994405a27f9e21..07a5907625612c9857818e467d4aee1df946574d 100644 (file)
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -8,7 +8,7 @@ stages:
 
 .meson-build: &meson-build
   script:
-    - meson _build
+    - CFLAGS="-Wl,--no-undefined" meson _build
     - cd _build
     - ninja dist
     - shellcheck -S error scripts/plymouth-*