chore: debug gha bustage

Author: MrAlex94

.github/workflows/build.yml

@@ -308,7 +308,15 @@ jobs:
             echo "WFX_PRE_RELEASE should be 0. ${WFX_PRE_RELEASE}"
           fi
           export GEN_PGO=1
-          ./mach build
+          ./mach build -v
+      - name: 🐛 Debug toolchain config (on failure)
+        if: failure()
+        run: |
+          grep -nE '^(CC|CXX|AS|LD) ?=' obj-${{ matrix.arch }}/config/autoconf.mk || true
+          grep -nE '^(CC|CXX|AS|LD)=' obj-${{ matrix.arch }}/config/external/nspr/config.log || true
+          grep -n "configure:.*checking for the assembler" -n obj-${{ matrix.arch }}/config/external/nspr/config.log || true
+          grep -n "checking for the target C compiler" -n obj-${{ matrix.arch }}/config.log || true
+          grep -n "checking for target linker" -n obj-${{ matrix.arch }}/config.log || true
       - name: 📦 Package
         run: |
           ./mach package