Add GCC Debug job

To build code with enabled assertions but disable symbols to make it faster.

.gitlab-ci.yml

@@ -100,6 +100,21 @@ Ubuntu_GCC:
   # When CCache doesn't exist (e.g. first build on a fork), build takes more than 1h, which is the default for forks.
   timeout: 2h
 
+Ubuntu_GCC_Debug:
+  extends: .Ubuntu
+  cache:
+    key: Ubuntu_GCC_Debug.ubuntu_22.04.v1
+  before_script:
+    - CI/install_debian_deps.sh gcc openmw-deps openmw-deps-dynamic
+  variables:
+    CC: gcc
+    CXX: g++
+    CCACHE_SIZE: 4G
+    CMAKE_BUILD_TYPE: Debug
+    CMAKE_CXX_FLAGS_DEBUG: -O0
+  # When CCache doesn't exist (e.g. first build on a fork), build takes more than 1h, which is the default for forks.
+  timeout: 2h
+
 Ubuntu_GCC_tests:
   extends: Ubuntu_GCC
   cache:

CI/before_script.linux.sh

@@ -24,7 +24,6 @@ declare -a CMAKE_CONF_OPTS=(
     -DCMAKE_C_COMPILER_LAUNCHER=ccache
     -DCMAKE_CXX_COMPILER_LAUNCHER=ccache
     -DCMAKE_INSTALL_PREFIX=install
-    -DCMAKE_BUILD_TYPE=RelWithDebInfo
     -DBUILD_SHARED_LIBS=OFF
     -DUSE_SYSTEM_TINYXML=ON
     -DOPENMW_USE_SYSTEM_RECASTNAVIGATION=ON
@@ -52,6 +51,10 @@ if [[ "${CMAKE_BUILD_TYPE}" ]]; then
     CMAKE_CONF_OPTS+=(
         -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
     )
+else
+    CMAKE_CONF_OPTS+=(
+        -DCMAKE_BUILD_TYPE=RelWithDebInfo
+    )
 fi
 
 if [[ "${CMAKE_CXX_FLAGS_DEBUG}" ]]; then