From 5ea84dd335cf19ca3771b3d8c9b2a9b2f4f31031 Mon Sep 17 00:00:00 2001 From: Peter Kasting Date: Thu, 27 Aug 2015 14:04:04 -0700 Subject: Refine check for unordered_{map|set} availability. It's not enough to check for C++11 language support, as it's possible for projects to enable C++11 language and library features independently (e.g. Chromium currently does this). Instead, explicitly check the library version to see if it is recent enough to include unordered_{map|set}. --- src/google/protobuf/stubs/hash.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'src/google/protobuf/stubs/hash.h') diff --git a/src/google/protobuf/stubs/hash.h b/src/google/protobuf/stubs/hash.h index 9a6b217a..3ff72535 100755 --- a/src/google/protobuf/stubs/hash.h +++ b/src/google/protobuf/stubs/hash.h @@ -41,10 +41,10 @@ #define GOOGLE_PROTOBUF_HAVE_HASH_MAP 1 #define GOOGLE_PROTOBUF_HAVE_HASH_SET 1 -// Use C++11 unordered_{map|set} if available. Otherwise, libc++ always support -// unordered_{map|set} -#if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X) || \ - defined(_LIBCPP_VERSION) +// Use C++11 unordered_{map|set} if available. +#if ((__cplusplus >= 201103L) && \ + ((defined(__GLIBCXX__) && (__GLIBCXX__ > 20090421)) || \ + (defined(_LIBCPP_VERSION) && (_LIBCPP_STD_VER >= 11)))) # define GOOGLE_PROTOBUF_HAS_CXX11_HASH // For XCode >= 4.6: the compiler is clang with libc++. -- cgit v1.2.3