Change order in action workflow

.github/workflows/build.yml

@@ -91,12 +91,6 @@ jobs:
         echo "VIRTUAL_ENV=$VIRTUAL_ENV" >> $GITHUB_ENV
         echo "PATH=$PATH" >> $GITHUB_ENV
 
-    - name: add clang cxxflags
-      if: ${{ contains(matrix.cxx, 'clang') }}
-      run: |
-        echo "PATH=/usr/local/opt/llvm/bin:$PATH" >> $GITHUB_ENV
-        echo "CXXFLAGS=-stdlib=libc++" >> $GITHUB_ENV
-
     - name: Build doxygen
       if: matrix.doc == 'ON'
       env:
@@ -110,10 +104,16 @@ jobs:
         git checkout Release_1_10_0
         mkdir build
         cd build
-        cmake .. -Duse_libclang=ON
+        cmake .. -Duse_libclang=ON -Dstatic_libclang=ON -Duse_libc++=OFF -DLLVM_ROOT=/usr/lib/llvm-15/lib/cmake/llvm -DClang_ROOT=/usr/lib/llvm-15/lib/cmake/clang
         make -j 2 VERBOSE=1
         make install
 
+    - name: add clang cxxflags
+      if: ${{ contains(matrix.cxx, 'clang') }}
+      run: |
+        echo "PATH=/usr/local/opt/llvm/bin:$PATH" >> $GITHUB_ENV
+        echo "CXXFLAGS=-stdlib=libc++" >> $GITHUB_ENV
+
     - name: Build itertools
       env:
         CC: ${{ matrix.cc }}