[libcxx-commits] [libcxx] [libc++] Warn when users request a deployment target below the minimum supported version (PR #172664)

[via libcxx-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-libcxx

Author: Nikolas Klauser (philnik777)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/172664.diff


1 Files Affected:

- (modified) libcxx/include/__configuration/availability.h (+8) 


``````````diff
diff --git a/libcxx/include/__configuration/availability.h b/libcxx/include/__configuration/availability.h
index a5bd266b771fd..9806ca9d36bf9 100644
--- a/libcxx/include/__configuration/availability.h
+++ b/libcxx/include/__configuration/availability.h
@@ -196,6 +196,14 @@
     __attribute__((availability(bridgeos, strict, introduced = 6.0)))                                             \
     __attribute__((availability(driverkit, strict, introduced = 21.3)))
 
+#  if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__)  && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__  < 110000) || \
+      (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 150000) || \
+      (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__)     && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__     < 150000) || \
+      (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__)  && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__  < 80000)  || \
+      (defined(__ENVIRONMENT_DRIVERKIT_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_DRIVERKIT_VERSION_MIN_REQUIRED__ < 200000)
+#  warning "The selected platform is no longer supported by libc++."
+#  endif
+
 #else
 
 // ...New vendors can add availability markup here...

``````````

</details>


https://github.com/llvm/llvm-project/pull/172664