ci: Fix the harfbuzz build on MacOS

We need to force c++11 at the toplevel here, since
meson can't deal with per-project compiler choice.

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index ed714f4668bf71fb00fc32f95afcfd53a39ce308..770e9162c3261388d06808f09415738ad570bcb7 100644 (file)
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -157,6 +157,7 @@ macos:
   script:
     - meson -Dx11-backend=false
             -Dintrospection=disabled
+            -Dcpp_std=c++11
             _build
     - ninja -C _build
   artifacts: