From 66f5494361b8aaaf1698492915a9d10eb2361c36 Mon Sep 17 00:00:00 2001
From: Dave Abrahams <dabrahams@adobe.com>
Date: Mon, 19 Aug 2024 12:00:37 -0700
Subject: [PATCH] Enable library evolution in CMake build

The use of `@_implementationOnly` causes the compiler to warn of instability at runtime otherwise.
---
 Sources/ArgumentParser/CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Sources/ArgumentParser/CMakeLists.txt b/Sources/ArgumentParser/CMakeLists.txt
index 220419beb..0e1279f7d 100644
--- a/Sources/ArgumentParser/CMakeLists.txt
+++ b/Sources/ArgumentParser/CMakeLists.txt
@@ -50,7 +50,7 @@ add_library(ArgumentParser
 set_target_properties(ArgumentParser PROPERTIES
   INTERFACE_INCLUDE_DIRECTORIES ${CMAKE_Swift_MODULE_DIRECTORY})
 target_compile_options(ArgumentParser PRIVATE
-  $<$<BOOL:${BUILD_TESTING}>:-enable-testing>)
+  $<$<BOOL:${BUILD_TESTING}>:-enable-testing> -enable-library-evolution)
 target_link_libraries(ArgumentParser PRIVATE
   $<$<NOT:$<PLATFORM_ID:Darwin>>:Foundation>
   ArgumentParserToolInfo)