Merge pull request #26210 from compnerd/dynamic-only

stdlib: prevent static builds on Darwin

Author: compnerd

stdlib/CMakeLists.txt

@@ -77,7 +77,12 @@ if(SWIFT_BUILD_DYNAMIC_STDLIB)
   list(APPEND SWIFT_STDLIB_LIBRARY_BUILD_TYPES SHARED)
 endif()
 if(SWIFT_BUILD_STATIC_STDLIB)
-  list(APPEND SWIFT_STDLIB_LIBRARY_BUILD_TYPES STATIC)
+  list_intersect("${SWIFT_APPLE_PLATFORMS}" "${SWIFT_SDKS}" building_darwin_sdks)
+  if(building_darwin_sdks)
+    message(SEND_ERROR "cannot build static standard library for Darwin SDKs")
+  else()
+    list(APPEND SWIFT_STDLIB_LIBRARY_BUILD_TYPES STATIC)
+  endif()
 endif()
 
 function(swift_create_stdlib_targets name variant define_all_alias)

stdlib/public/Darwin/CMakeLists.txt

@@ -5,7 +5,12 @@ if(SWIFT_BUILD_DYNAMIC_SDK_OVERLAY)
   list(APPEND SWIFT_SDK_OVERLAY_LIBRARY_BUILD_TYPES SHARED)
 endif()
 if(SWIFT_BUILD_STATIC_SDK_OVERLAY)
-  list(APPEND SWIFT_SDK_OVERLAY_LIBRARY_BUILD_TYPES STATIC)
+  list_intersect("${SWIFT_APPLE_PLATFORMS}" "${SWIFT_SDKS}" building_darwin_sdks)
+  if(building_darwin_sdks)
+    message(SEND_ERROR "cannot build static standard library for Darwin SDKs")
+  else()
+    list(APPEND SWIFT_SDK_OVERLAY_LIBRARY_BUILD_TYPES STATIC)
+  endif()
 endif()
 
 set(all_overlays