fix(llvm)

closes #5796

projects/llvm.org/package.yml

@@ -64,9 +64,11 @@ build:
     # move linux libs into /lib
     - run: |
         TARGET="$(find . -maxdepth 1 -type d -name \*-unknown-linux-gnu)"
-        mv "$TARGET"/* .
-        rmdir "$TARGET"
-        ln -s . "$TARGET"
+        if test -n "$TARGET"; then
+          mv "$TARGET"/* .
+          rmdir "$TARGET"
+          ln -s . "$TARGET"
+        fi
       working-directory: ${{prefix}}/lib
       if: linux
 
@@ -124,16 +126,29 @@ test:
     crates.io/semverator: '*'
   script:
     # Building compiler-rt on darwin+aarch64 fails for versions less than
-    # 14 with the below configuration. FIXME if possible, of course.
+    # 14 with the below configuration, and on darwin generally for 18.1.3.
+    # FIXME if possible, of course.
+    - run: LINUX=1
+      if: linux
+    - run: AARCH64=1
+      if: aarch64
+    - run: GT13=1
+      if: '>=13'
+    - run: GT14=1
+      if: '>=14'
+    - run: EQ1813=1
+      if: '=18.1.3'
+    # cases
+    # "1,*,*,*," => linux != 18.1.3
+    # ",,1,*," => darwin+x86-64 >=13 != 18.1.3
+    # ",1,1,1," => darwin+aarch64 >=14 != 18.1.3
     - run: |
-        if test "{{hw.platform}}" = "linux"; then
-          ARGS="$ARGS -fsanitize=address,undefined"
-        elif semverator satisfies '>=14' {{version}}; then
-          ARGS="$ARGS -fsanitize=address,undefined"
-        elif test "{{hw.arch}}" = "x86-64" && semverator satisfies '>=14' {{version}}; then
-          ARGS="$ARGS -fsanitize=address,undefined"
-        fi
-      # if: linux || >=14 || (x86-64 && >=13)  ## Brewkit can't do this. Yet.
+        case "$LINUX,$AARCH64,$GT13,$GT14,$EQ1813" in
+          "1,*,*,*,"|",,1,*,"|",1,1,1,") ARGS="$ARGS -fsanitize=address,undefined";;
+          *) ;;
+        esac
+      # if: linux || >=14<18.1.3 || (x86-64 && >=13<18.1.3)  ## Brewkit can't do this. Yet.
+
     - mv $FIXTURE $FIXTURE.c
     - clang $ARGS $FIXTURE.c
     - ./a.out