Add CI build checks for ensure PRs don't break anything (#410)

.github/workflows/matrix_build.yml

@@ -468,3 +468,17 @@ jobs:
           TG_HEADER=$(echo -e "\r\nCommit: $GIT_HASH \r\nBranch: $BRANCH \r\nTag: $TAG_NAME \r\n\r\n\xE2\x9C\x85 GitHub Actions")
           curl $TG_OPTIONS -H "Content-Type: multipart/form-data" -X POST https://api.telegram.org/bot$TG_TOKEN/sendDocument \
             -F chat_id=$TG_CHANNEL -F document="@$NORFW_PATH" -F caption="$TG_HEADER"
+
+  ci-build-check:
+    if:  always() && github.event.pull_request
+    runs-on: ubuntu-latest
+    name: CI Build Check
+    needs: [buildroot]
+    steps:
+      - run: |
+          result="${{ needs.buildroot.result }}"
+          if [[ $result == "success" || $result == "skipped" ]]; then
+            exit 0
+          else
+            exit 1
+          fi

Makefile

@@ -48,7 +48,9 @@ clean:
 
 prepare: $(BR_DIR)
 $(ROOT_DIR)/buildroot-$(BR_VER).tar.gz:
-	wget -O $@ --header="Host: buildroot.org" --no-check-certificate https://buildroot.org/downloads/buildroot-$(BR_VER).tar.gz
+	wget -O $@ -nv \
+		--retry-connrefused --continue --timeout=15 \
+		http://buildroot.org/downloads/buildroot-$(BR_VER).tar.gz
 
 $(BR_DIR): $(ROOT_DIR)/buildroot-$(BR_VER).tar.gz
 	tar -C $(ROOT_DIR) -xf buildroot-$(BR_VER).tar.gz

br-ext-chip-ambarella/board/s3l/kernel/patches/20_fix_gcc8.patch

@@ -0,0 +1 @@
+../../../../../patches/linux/3.10.x/gcc8_err_encountered.patch