ci: add a second stage verification, that the generated v.c is viable in bootstrapping_works_ci.yml (#19640)

.github/workflows/bootstrapping_works_ci.yml

@@ -3,62 +3,38 @@ name: Bootstrapping works
 on:
   schedule:
     - cron: '0 */6 * * *'
+  push:
+    paths-ignore:
+      - "**.md"
+  pull_request:
+    paths-ignore:
+      - "**.md"
+
+concurrency:
+  group: code-ci-${{ github.event.pull_request.number || github.sha }}
+  cancel-in-progress: true
 
 jobs:
-  ubuntu:
+  bootstrapping-works:
-    runs-on: ubuntu-latest
+    if: >
-    if: github.event.ref == 'refs/heads/master' && github.event.repository.full_name == 'vlang/v'
+        github.event_name != 'push'
+        || github.event.ref == 'refs/heads/master'
+        || github.event.repository.full_name != 'vlang/v'
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
     timeout-minutes: 30
     env:
-      VFLAGS: -cc tcc -no-retry-compilation
+      VFLAGS: -cc clang -no-parallel
-      B_CFLAGS: -g -std=c99 -w
+      B_CFLAGS: -g
       B_LFLAGS: -lm -lpthread
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 10
       - name: Build v
         run: make
-
-      - name: v.c can be compiled and run with -os cross (bootstrapping works)
-        run: |
-          ls -la v vc/v.c
-          ./v -os cross -o vc/v.c cmd/v
-          gcc $B_CFLAGS -o v_from_vc vc/v.c $B_LFLAGS
-          ls -lart v_from_vc
-          ./v_from_vc version
-          ./v_from_vc run examples/hello_world.v
-          ./v_from_vc -o v_from_vc_produced_native_v cmd/v
-          ./v_from_vc_produced_native_v run examples/hello_world.v
-          make local=1
-          ls -la v vc/v.c v_from_vc v_from_vc_produced_native_v
-
-      - name: Ensure v up works
-        run: |
-          ./v cmd/tools/oldv.v
-          ./cmd/tools/oldv -v HEAD^^^^^
-          cd ~/.cache/oldv/v_at_HEAD_____/
-          ./v version
-          ./v -v up
-          ./v version
-          ./v  -o v2 cmd/v
-          ./v2 -o v3 cmd/v
-
-  macos:
-    runs-on: macos-latest
-    if: github.event.ref == 'refs/heads/master' && github.event.repository.full_name == 'vlang/v'
-    timeout-minutes: 30
-    env:
-      VFLAGS: -cc clang
-      B_CFLAGS: -g -std=c99 -w
-      B_LFLAGS: -lm -lpthread
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          fetch-depth: 10
-      - name: Build V
-        run: make && ./v -cg -cstrict -o v cmd/v
-
       - name: v.c can be compiled and run with -os cross (bootstrapping works)
         run: |
           ls -la v vc/v.c
@@ -69,7 +45,29 @@ jobs:
           ./v_from_vc run examples/hello_world.v
           ./v_from_vc -o v_from_vc_produced_native_v cmd/v
           ./v_from_vc_produced_native_v run examples/hello_world.v
-          ### the next make invocation will simulate building V from scratch,
+          ### the next make invocation will simulate building V from scratch
-          ### using this commit
           make local=1
           ls -la v vc/v.c v_from_vc v_from_vc_produced_native_v
+          ./v_from_vc_produced_native_v -os cross -o vc/v.c cmd/v
+          ### do it a second time, just in case:
+          clang $B_CFLAGS -o v_from_vc2 vc/v.c $B_LFLAGS
+          ls -lart v_from_vc2
+          ./v_from_vc2 version
+          ./v_from_vc2 run examples/hello_world.v
+          ./v_from_vc2 -o v_from_vc_produced_native_v2 cmd/v
+          ./v_from_vc_produced_native_v2 run examples/hello_world.v
+          make local=1
+          ls -la v vc/v.c
+          ls -la v_from_vc v_from_vc_produced_native_v
+          ls -la v_from_vc2 v_from_vc_produced_native_v2
+
+      - name: Ensure v up works
+        run: |
+          ./v cmd/tools/oldv.v
+          ./cmd/tools/oldv -v HEAD^^^
+          cd ~/.cache/oldv/v_at_HEAD___/
+          ./v version
+          ./v -v up
+          ./v version
+          ./v  -o v2 cmd/v
+          ./v2 -o v3 cmd/v