github: Build the msvcrt toolchains with LTO and PGO

Author: mstorsjo

.github/workflows/msvcrt.yml

@@ -106,6 +106,14 @@ jobs:
       - uses: actions/checkout@v4
         with:
           ref: ${{inputs.ref}}
+      - name: Download profile
+        uses: dawidd6/action-download-artifact@v6
+        with:
+          workflow: build.yml
+          workflow_conclusion: success
+          ref: ${{inputs.ref}}
+          event: push
+          name: profile
       - name: Build
         env:
           LLVM_VERSION: ${{needs.prepare.outputs.LLVM_VERSION}}
@@ -114,7 +122,7 @@ jobs:
           TAG: ${{needs.prepare.outputs.TAG}}
         run: |
           sudo apt-get update && sudo apt-get install libltdl-dev swig autoconf-archive
-          ./build-cross-tools.sh /opt/llvm-mingw $(pwd)/install/llvm-mingw ${{matrix.arch}} --with-python
+          ./build-cross-tools.sh /opt/llvm-mingw $(pwd)/install/llvm-mingw ${{matrix.arch}} --with-python --thinlto --pgo
           .github/workflows/store-version.sh install/llvm-mingw/versions.txt
           cd install
           NAME=llvm-mingw-$TAG-${{matrix.crt}}-${{matrix.arch}}