[libcxx-commits] [PATCH] D100336: [libc++] Provide c++03 alternative for va_copy if available in xlocale.h

[Jason Liu via Phabricator via libcxx-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rGa319eafd160d: [libc++] Provide c++03 alternative for va_copy if available in xlocale.h (authored by jasonliu).
Herald added a project: libc++.
Herald added a subscriber: libcxx-commits.

Changed prior to commit:
  https://reviews.llvm.org/D100336?vs=337570&id=355954#toc

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D100336/new/

https://reviews.llvm.org/D100336

Files:
  libcxx/include/__support/ibm/xlocale.h


Index: libcxx/include/__support/ibm/xlocale.h
===================================================================
--- libcxx/include/__support/ibm/xlocale.h
+++ libcxx/include/__support/ibm/xlocale.h
@@ -310,7 +310,12 @@
   }
 
   va_list ap_copy;
+  // va_copy may not be provided by the C library in C++ 03 mode.
+#if defined(_LIBCPP_CXX03_LANG) && __has_builtin(__builtin_va_copy)
+  __builtin_va_copy(ap_copy, ap);
+#else
   va_copy(ap_copy, ap);
+#endif
   int str_size = vsnprintf(*strp, buff_size, fmt,  ap_copy);
   va_end(ap_copy);
 


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