diff options
| author | Eric Fiselier <eric@efcs.ca> | 2016-10-10 05:34:18 +0000 |
|---|---|---|
| committer | Eric Fiselier <eric@efcs.ca> | 2016-10-10 05:34:18 +0000 |
| commit | a244bb9d18007e51833759a26dc3a29e3616c952 (patch) | |
| tree | 5241760b2525d563ed97caa879d9778d1cafd7af /include/type_traits | |
| parent | 051593845dfa97a9787cdf9297e7f47cfeb6cde5 (diff) | |
Provide a constexpr addressof with GCC 7.
__builtin_addressof was added to the GCC trunk in the past week. This patch
teaches libc++ about it so it can correctly provide constexpr addressof.
Unfortunately this patch will break users of earlier GCC 7 builds, since
we expect __builtin_addressof but one won't be provided. One option would be
to only use __builtin_addressof for GCC 7.1 and above, but that means
waiting for another release.
Instead I've specifically chosen to break older GCC 7 versions. Since GCC 7
has yet to be released, and the 7.0 release is a development release, I
believe that anybody currently using GCC 7.0 will have no issue upgrading.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@283715 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/type_traits')
| -rw-r--r-- | include/type_traits | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/type_traits b/include/type_traits index c63dea481..735eab790 100644 --- a/include/type_traits +++ b/include/type_traits @@ -425,7 +425,7 @@ template <bool _Bp, class _Tp = void> using enable_if_t = typename enable_if<_Bp #endif // addressof -#if __has_builtin(__builtin_addressof) +#if __has_builtin(__builtin_addressof) || _GNUC_VER >= 700 template <class _Tp> inline _LIBCPP_CONSTEXPR_AFTER_CXX14 |