WIP add script to build custom GHC and workflow. Link directly in build.rs

Author: limemloh

.github/workflows/build-static-ghc.yaml

@@ -0,0 +1,42 @@
+name: Build ghc with statically linked libraries
+on:
+  workflow_dispatch:
+    inputs:
+      ghcVersion:
+        description: Specify the version of GHC to build
+        required: true
+jobs:
+  build-ghc:
+    name: Build ghc for linux x64
+    runs-on: ubuntu-latest
+    steps:
+     - name: Checkout Repository
+       uses: actions/checkout@v4
+     - name: Run the build script
+       run: ./scripts/build-static-ghc.sh ${{ github.event.inputs.ghcVersion }} ${{ runner.temp }}
+     - name: Upload artifacts
+       uses: actions/upload-artifact@v6
+       with:
+         name: ghc
+         if-no-files-found: error
+         compression-level: 0 # no compression since this is already compressed
+         path: |
+           ${{ runner.temp }}/ghc-${{ github.event.inputs.ghcVersion }}/_build/bindist/ghc-${{ github.event.inputs.ghcVersion }}-x86_64-unknown-linux.tar.xz
+  upload:
+    name: Upload to S3
+    runs-on: ubuntu-latest
+    environment: s3-push
+    steps:
+     - name: Setup AWS CLI
+       uses: aws-actions/configure-aws-credentials@v1
+       with:
+         aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
+         aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+         aws-region: us-east-1
+     - name: Download artifacts
+       uses: actions/download-artifact@v7
+       with:
+         name: ghc
+     - name: Upload to S3
+       run: |
+         aws s3 cp ghc/ghc-${{ github.event.inputs.ghcVersion }}-x86_64-unknown-linux.tar.xz s3://static-libraries.concordium.com/ --grants read=uri=http://acs.amazonaws.com/groups/global/AllUsers

concordium-consensus/stack.static.yaml

@@ -1,5 +1,19 @@
 resolver: lts-24.0
 
+# To be able to produce a statically linked shared library, we need to use a ghc
+# and libraries variant compiled with Position Independent Code (PIC) enabled.
+# Such a build is not provided by default, so instead we use a custom build.
+#
+# See `/scripts/build-static-ghc.sh` for how to do this.
+ghc-variant: static-build
+setup-info:
+  ghc:
+    linux64-custom-static-build-tinfo6:
+      9.10.2:
+        url: "/home/lime/Concordium/concordium-node/ghc2/ghc-9.10.2/_build/bindist/ghc-9.10.2-x86_64-unknown-linux.tar.xz"
+        # "https://s3-eu-west-1.amazonaws.com/static-libraries.concordium.com/ghc-9.10.2-fpic-gmp-x86_64-unknown-linux-gnu.tar.gz"
+        # sha256: 07d347a6d28bd818fde1a5b9d5ae79fcca63e225
+
 packages:
 - .
 - haskell-lmdb
@@ -14,3 +28,7 @@ extra-lib-dirs:
 ghc-options:
     # `simpl-tick-factor` parameter here is necessary due to a bug in the ghc: https://gitlab.haskell.org/ghc/ghc/-/issues/14637#note_413425
     "$everything": -fPIC -fsimpl-tick-factor=10000
+
+flags:
+  concordium-consensus:
+    dynamic: false