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| author | Eric Fiselier <eric@efcs.ca> | 2016-05-10 16:17:43 +0000 |
|---|---|---|
| committer | Eric Fiselier <eric@efcs.ca> | 2016-05-10 16:17:43 +0000 |
| commit | a5e201fd5570baa620cd266a73c156420f471ba8 (patch) | |
| tree | 6cbe35a6bb670db7eb82cf6f5faf32b2e66a9c00 /libcxx/cmake | |
| parent | 129fba7fb64dc003b822f801964647983f132f7f (diff) | |
| download | bcm5719-llvm-a5e201fd5570baa620cd266a73c156420f471ba8.tar.gz bcm5719-llvm-a5e201fd5570baa620cd266a73c156420f471ba8.zip | |
[libcxx] Prefer C++14 over C++11 when building libc++experimental.
Summary:
Currently libc++experimental builds with C++11. This patch changes that to C++14 when supported by the compiler. Although nothing currently requires C++14 the upcoming <experimental/memory_resource> implementation would benefit from it. [1]
Note that libc++.so continues to build with C++11 and is unaffected by this change.
[1] <experimental/memory_resource> provides global resources which must exist for the entire lifetime of the program. In order to ensure that a global resource can be used during program termination there destructors must never be invoked. The only way to do this, while also allowing "constant initialization", is to use a C++14 union.
Reviewers: mclow.lists
Subscribers: pete, cfe-commits
Differential Revision: http://reviews.llvm.org/D19992
llvm-svn: 269070
Diffstat (limited to 'libcxx/cmake')
| -rw-r--r-- | libcxx/cmake/Modules/HandleLibcxxFlags.cmake | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libcxx/cmake/Modules/HandleLibcxxFlags.cmake b/libcxx/cmake/Modules/HandleLibcxxFlags.cmake index bb886fa8a01..b8ea1344644 100644 --- a/libcxx/cmake/Modules/HandleLibcxxFlags.cmake +++ b/libcxx/cmake/Modules/HandleLibcxxFlags.cmake @@ -35,6 +35,11 @@ macro(remove_flags) endforeach() endmacro(remove_flags) +macro(check_flag_supported flag) + mangle_name("${flag}" flagname) + check_cxx_compiler_flag("${flag}" "LIBCXX_SUPPORTS_${flagname}_FLAG") +endmacro() + # Add a macro definition if condition is true. macro(define_if condition def) if (${condition}) |
