Fix a folly build failure with GCC5

Summary:
I tested it doesn't break the gcc 4.9 and clang builds - I didn't try any other versions of anything.

build[all]

Reviewed By: meyering

Differential Revision: D3757152

fbshipit-source-id: a126cd31cb89057dececfed1b265f452ee29fbff

diff --git a/folly/Portability.h b/folly/Portability.h
index 12cff605f58128841d4a8f6967ca7f6037bc4905..ff1445224bcda462b5f4a1edb3b9421cc6f3f01e 100644 (file)
--- a/folly/Portability.h
+++ b/folly/Portability.h
@@ -231,7 +231,8 @@ namespace std { typedef ::max_align_t max_align_t; }
 // If the new c++ ABI is used, __cxx11 inline namespace needs to be added to
 // some types, e.g. std::list.
 #if _GLIBCXX_USE_CXX11_ABI
-# define FOLLY_GLIBCXX_NAMESPACE_CXX11_BEGIN _GLIBCXX_BEGIN_NAMESPACE_CXX11
+#define FOLLY_GLIBCXX_NAMESPACE_CXX11_BEGIN \
+  inline _GLIBCXX_BEGIN_NAMESPACE_CXX11
 # define FOLLY_GLIBCXX_NAMESPACE_CXX11_END   _GLIBCXX_END_NAMESPACE_CXX11
 #else
 # define FOLLY_GLIBCXX_NAMESPACE_CXX11_BEGIN