openwrt/package/libs/libcxx/patches/010-cxx17.patch

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--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -524,9 +524,9 @@ remove_flags(-Wno-pedantic -pedantic-err
if (LIBCXX_HAS_MUSL_LIBC OR LIBCXX_TARGETING_CLANG_CL)
# musl's pthread implementations uses volatile types in their structs which is
# not a constexpr in C++11 but is in C++14, so we use C++14 with musl.
- set(LIBCXX_STANDARD_VER c++14 CACHE STRING "internal option to change build dialect")
+ set(LIBCXX_STANDARD_VER c++2a CACHE STRING "internal option to change build dialect")
else()
- set(LIBCXX_STANDARD_VER c++11 CACHE STRING "internal option to change build dialect")
+ set(LIBCXX_STANDARD_VER c++2a CACHE STRING "internal option to change build dialect")
endif()
add_compile_flags_if_supported(-std=${LIBCXX_STANDARD_VER})
add_compile_flags_if_supported("/std:${LIBCXX_STANDARD_VER}")