New workflow to trigger the build of clang rt builtins

Author: apaillier-ledger

.github/workflows/build_clangrt_builtins.yml

@@ -0,0 +1,45 @@
+name: Build clang runtime builtins
+on:
+  workflow_dispatch:
+  # TODO: remove this next line before merging!
+  push:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    container:
+      image: ghcr.io/ledgerhq/ledger-app-builder/ledger-app-builder-lite:latest
+    strategy:
+      fail-fast: false
+      matrix:
+        target:
+          - core: cortex-m3
+            se: st33
+          - core: cortex-m35p+nodsp
+            se: st33k1
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          # TODO: remove this next line before merging!
+          ref: feat/apa/clangrt
+          sparse-checkout: |
+            tools/build_clangrt_builtins.sh
+          sparse-checkout-cone-mode: false
+
+      - run: ./tools/build_clangrt_builtins.sh -t ${{ matrix.target.core }} -o artifact/arch/${{ matrix.target.se }}/lib
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: arch-${{ matrix.target.se }}
+          path: artifact/
+
+  merge:
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/upload-artifact/merge@v4
+        with:
+          name: arch
+          pattern: arch-*
+          delete-merged: true