[gtk/ci-install-build: 1/3] ci: Test building against installed GTK

[Matthias Clasen <matthiasc src gnome org>]

commit 4ce134df98e18a77144a5eb0d1868030a2a7fbf2
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Jun 8 17:39:34 2021 -0400

    ci: Test building against installed GTK
    
    This is meant to ensure that we e.g. install the
    right header files, and so on.

 .gitlab-ci.yml | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index f195a3374f..67b9f68074 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -79,9 +79,14 @@ fedora-x86_64:
   script:
     - .gitlab-ci/show-info-linux.sh
     - meson subprojects update
-    - meson ${COMMON_MESON_FLAGS} ${EXTRA_MESON_FLAGS} ${BACKEND_FLAGS} ${FEATURE_FLAGS}
+    - mkdir _install
+    - meson --prefix=${CI_PROJECT_DIR}/_install
+            ${COMMON_MESON_FLAGS} ${EXTRA_MESON_FLAGS} ${BACKEND_FLAGS} ${FEATURE_FLAGS}
             _build
-    - ninja -C _build
+    - meson compile -C _build
+    - meson install -C _build
+    - PKG_CONFIG_PATH=${CI_PROJECT_DIR}/_install/lib64/pkgconfig meson setup _build_hello examples/hello
+    - meson compile -C _build_hello
     - .gitlab-ci/run-tests.sh _build x11
     - .gitlab-ci/run-tests.sh _build wayland
     - .gitlab-ci/run-tests.sh _build broadway