ci: Turn on -Werror

Now that all compiler warnings are fixed, let's try to keep it that
way by making warnings fatal during CI.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/709

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index cedd587c52d93c7bf531b4e73cd39d482ee0bfeb..03c7f9786b905ba29aaa2fb452a21be85a0ac5b6 100644 (file)
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -54,7 +54,7 @@ build:
         - meson mutter mutter/build --prefix=/usr -Dtests=false
         - ninja -C mutter/build install
     script:
-        - meson . build -Dbuiltype=debugoptimized -Dman=false
+        - meson . build -Dbuiltype=debugoptimized -Dman=false --werror
         - ninja -C build
         - ninja -C build install
     <<: *only_default