fixes deno on darwin/aarch64 (#96)

projects/llvm.org/package.yml

@@ -19,6 +19,20 @@ build:
     python.org: 3
   working-directory: build
   script: |-
+    if test {{ hw.target }} = x86_64-unknown-linux-gnu; then
+      # required to build something that works on linux/x86-64
+      ARGS="$ARGS
+        -DCLANG_DEFAULT_CXX_STDLIB=libstdc++
+        -DCLANG_DEFAULT_RTLIB=libgcc
+        -DCOMPILER_RT_INCLUDE_TESTS=OFF
+        -DCOMPILER_RT_USE_LIBCXX=OFF"
+    fi
+
+    # without this macOS programs typically won’t link to core symbols
+    if test {{ hw.platform }} = darwin; then
+      ARGS="$ARGS -DDEFAULT_SYSROOT=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk"
+    fi
+
     cmake \
       ../llvm \
       -G Ninja \
@@ -55,14 +69,19 @@ build:
       - -DCMAKE_INSTALL_PREFIX="{{ prefix }}"
       - -DCMAKE_BUILD_TYPE=Release
       - -DLLVM_ENABLE_PROJECTS='lld;clang'
-
-      # required to build something that works on linux/x86-64
-      - -DCLANG_DEFAULT_LINKER=ld
-      - -DCLANG_DEFAULT_CXX_STDLIB=libstdc++
-      - -DCLANG_DEFAULT_RTLIB=libgcc
-      - -DCOMPILER_RT_INCLUDE_TESTS=OFF
-      - -DCOMPILER_RT_USE_LIBCXX=OFF
-
+      - -DLLVM_INCLUDE_DOCS=OFF
+      - -DLLVM_INCLUDE_TESTS=OFF
+      # without this deno won’t build on darwin/aarch64
+      # with it nothing seems to break
+      - -DCLANG_DEFAULT_LINKER=lld
 test:
-  script:
-    clang --version
+  fixture: |
+    #include <stdio.h>
+    int main() {
+      printf("Hello World!\n");
+      return 0;
+    }
+  script: |
+    mv $FIXTURE $FIXTURE.c
+    clang $FIXTURE.c
+    ./a.out