add further debugging sections to workflow

Author: cdueben

.github/workflows/R-CMD-check.yaml

@@ -46,20 +46,34 @@ jobs:
 
       - name: Configure clang 16
         run: |
-          echo "/usr/local/opt/llvm@16/bin" >> $GITHUB_PATH
-          export PATH="/usr/local/opt/llvm@16/bin:$PATH"
-          echo "CC=/usr/local/opt/llvm@16/bin/clang -mmacos-version-min=13" >> $GITHUB_ENV
-          echo "CXX=/usr/local/opt/llvm@16/bin/clang++ -mmacos-version-min=13" >> $GITHUB_ENV
-          echo "LDFLAGS=-L/usr/local/opt/llvm@16/lib" >> $GITHUB_ENV
-          echo "CPPFLAGS=-I/usr/local/opt/llvm@16/include" >> $GITHUB_ENV
+          brew_prefix=$(brew --prefix llvm@16)
+          echo "$brew_prefix/bin" >> $GITHUB_PATH
+          export PATH="$brew_prefix/bin:$PATH"
+          # Test compiler
+          echo "Testing clang installation..."
+          clang --version
+          # Configure without flags first
+          echo "CC=$brew_prefix/bin/clang" >> $GITHUB_ENV
+          echo "CXX=$brew_prefix/bin/clang++" >> $GITHUB_ENV
+          echo "LDFLAGS=-L$brew_prefix/lib" >> $GITHUB_ENV
+          echo "CPPFLAGS=-I$brew_prefix/include" >> $GITHUB_ENV
+          # Create test program
+          echo "#include <stdio.h>" > test.c
+          echo "int main() { printf(\"Hello\\n\"); return 0; }" >> test.c
+          # Try to compile
+          $brew_prefix/bin/clang test.c -o test
+          ./test
 
       - name: Download and compile R-devel
         run: |
           curl -O https://stat.ethz.ch/R/daily/R-devel.tar.gz
           tar -xzf R-devel.tar.gz
           mkdir r-devel-build
           cd r-devel-build
-          sudo chown -R $(whoami) .
+          # Print current environment
+          echo "Current environment:"
+          env | sort
+          echo "Configuring R..."
           ../R-devel/configure \
             --with-C23 \
             --enable-R-shlib \
@@ -69,13 +83,10 @@ jobs:
             --with-readline \
             --with-tcltk \
             --with-recommended-packages \
-            --enable-RGBA
-          make
-          if [ $? -ne 0 ]; then
-            echo "R compilation failed. Showing config.log:"
-            cat config.log
-            exit 1
-          fi
+            --enable-RGBA || (cat config.log && false)
+          echo "Building R..."
+          make || (cat config.log && false)
+          echo "Installing R..."
           sudo make install
 
       - uses: r-lib/actions/setup-pandoc@v2