Disable dynamic-compile feature with LLVM 20 for now

Author: kinke

.github/actions/6-integration-test/action.yml

@@ -45,8 +45,9 @@ runs:
       run: |
         set -eux
         cd ..
-        if type -P apk &>/dev/null; then
-          exit 0 # Alpine: disabled dynamic-compile support
+        if ! ls installed/lib/*ldc-jit-rt* &>/dev/null; then
+          echo "ldc-jit-rt library not found, skipping test"
+          exit 0
         fi
         if [[ '${{ runner.os }}' == Windows ]]; then
           # add ldc-jit.dll dir to PATH

CMakeLists.txt

@@ -457,8 +457,11 @@ option(LDC_DYNAMIC_COMPILE_USE_CUSTOM_PASSES "Use custom LDC passes in jit" ON)
 if(LDC_DYNAMIC_COMPILE STREQUAL "AUTO")
     if(LDC_LLVM_VER LESS 1800)
         set(LDC_DYNAMIC_COMPILE OFF)
-    else()
+    # FIXME: dynamic-compile regressions with LLVM 20
+    elseif(LDC_LLVM_VER LESS 2000)
         set(LDC_DYNAMIC_COMPILE ON)
+    else()
+        set(LDC_DYNAMIC_COMPILE OFF)
     endif()
 endif()
 # https://llvm.org/docs/JITLink.html for the list of supported platforms