CI: CCache for GNUmake CUDA

Author: ax3l

.github/workflows/cuda.yml

@@ -85,6 +85,16 @@ jobs:
     - name: install dependencies
       run: |
         .github/workflows/dependencies/nvcc11.sh
+    - name: CCache Cache
+      uses: actions/cache@v2
+      # - once stored under a key, they become immutable (even if local cache path content changes)
+      # - for a refresh the key has to change, e.g., hash of a tracked file in the key
+      with:
+        path: ~/.ccache
+        key: ccache-cuda-gnumake-${{ hashFiles('.github/workflows/cuda.yml') }}-${{ hashFiles('cmake/dependencies/AMReX.cmake') }}
+        restore-keys: |
+          ccache-cuda-gnumake-${{ hashFiles('.github/workflows/cuda.yml') }}-
+          ccache-cuda-gnumake-
     - name: build WarpX
       run: |
         export PATH=/usr/local/nvidia/bin:/usr/local/cuda/bin:${PATH}

.github/workflows/dependencies/hip.sh

@@ -51,7 +51,7 @@ export CEI_TMP="/tmp/cei"
 
 # ccache 4.2+
 #
-cmake-easyinstall --prefix=/usr/local \
+CXXFLAGS="" cmake-easyinstall --prefix=/usr/local \
     git+https://github.com/ccache/[email protected] \
     -DCMAKE_BUILD_TYPE=Release        \
     -DENABLE_DOCUMENTATION=OFF        \