tree 51dd964d52b14e81ca4b9916dc12fa12407a5df5
parent f472d6c89df1fbf536af7cac1e7a68d09a5598ec
author Eric Fiselier <eric@efcs.ca> 1485207673 +0000
committer Eric Fiselier <eric@efcs.ca> 1485207673 +0000

Manually force the use of __decltype in C++03 with Clang 3.4.

<string> uses `decltype` in a way incompatible with `__typeof__`.
This is problematic when compiling <string> with Clang 3.4 because
even though it provides `__decltype` libc++ still used `__typeof__`
because clang 3.4 doesn't provide __is_identifier which libc++
uses to detect __decltype.

This patch manually detects Clang 3.4 and properly configures
for it.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@292833 91177308-0d34-0410-b5e6-96231b3b80d8