Reduce Emscripten build size and reduce build time by building libclang instead of clang target (#531)

Author: mcbarton

.github/workflows/emscripten.yml

@@ -327,7 +327,7 @@ jobs:
                         -DLLVM_ENABLE_THREADS=OFF                       \
                         -G Ninja                                         \
                         ../llvm
-          emmake ninja clang clangInterpreter clangStaticAnalyzerCore lld -j ${{ env.ncpus }}
+          emmake ninja libclang clangInterpreter clangStaticAnalyzerCore lld -j ${{ env.ncpus }}
         fi
         cd ../
         rm -rf $(find . -maxdepth 1 ! -name "build" ! -name "llvm" ! -name "clang" ! -name ".")

Emscripten-build-instructions.md

@@ -70,8 +70,8 @@ emcmake cmake -DCMAKE_BUILD_TYPE=Release \
                         -DLLVM_INCLUDE_TESTS=OFF                        \
                         -DLLVM_ENABLE_THREADS=OFF                       \
                         ../llvm
-emmake make clang -j $(nproc --all)
-emmake make clang-repl -j $(nproc --all)
+emmake make libclang -j $(nproc --all)
+emmake make clangInterpreter clangStaticAnalyzerCore -j $(nproc --all)
 emmake make lld -j $(nproc --all)
 ```
 

docs/Emscripten-build-instructions.rst

@@ -86,8 +86,8 @@ executing the following
                  -DLLVM_INCLUDE_TESTS=OFF                        \
                  -DLLVM_ENABLE_THREADS=OFF                       \
                  ../llvm
-   emmake make clang -j $(nproc --all)
-   emmake make clang-repl -j $(nproc --all)
+   emmake make libclang -j $(nproc --all)
+   emmake make clangInterpreter clangStaticAnalyzerCore -j $(nproc --all)
    emmake make lld -j $(nproc --all)
 
 Once this finishes building we need to take note of where we built our