try setting CC to clang

Author: fryorcraken

.github/workflows/ci.yml

@@ -148,11 +148,20 @@ jobs:
           echo "ncpu=$ncpu" >> $GITHUB_ENV
           echo "MAKE_CMD=${MAKE_CMD}" >> $GITHUB_ENV
 
+          # Set compiler based on platform
+          if [[ '${{ runner.os }}' == 'macOS' ]]; then
+            CC="clang"
+          else
+            CC="gcc"
+          fi
+          echo "CC=${CC}" >> $GITHUB_ENV
+          echo "NIM_CC=${CC}" >> $GITHUB_ENV
+
       - name: Build Nim and Nimble
         run: |
           curl -O -L -s -S https://raw.githubusercontent.com/status-im/nimbus-build-system/master/scripts/build_nim.sh
           env MAKE="${MAKE_CMD} -j${ncpu}" ARCH_OVERRIDE=${PLATFORM} NIM_COMMIT=${{ matrix.branch }} \
-            QUICK_AND_DIRTY_COMPILER=1 QUICK_AND_DIRTY_NIMBLE=1 CC=clang \
+            QUICK_AND_DIRTY_COMPILER=1 QUICK_AND_DIRTY_NIMBLE=1 CC=${CC} \
             bash build_nim.sh nim csources dist/nimble NimBinaries
           echo '${{ github.workspace }}/nim/bin' >> $GITHUB_PATH
       - name: Setup Nimble