[libc++abi] Build the dylib with C++17, like for libc++

diff --git a/libcxxabi/src/CMakeLists.txt b/libcxxabi/src/CMakeLists.txt
index 0503569..10300d1 100644 (file)
--- a/libcxxabi/src/CMakeLists.txt
+++ b/libcxxabi/src/CMakeLists.txt
@@ -177,7 +177,7 @@ if (LIBCXXABI_ENABLE_SHARED)
                           CXX_EXTENSIONS
                             OFF
                           CXX_STANDARD
-                            11
+                            17
                           CXX_STANDARD_REQUIRED
                             ON
                           COMPILE_FLAGS