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[libc++] [libc++abi] Use C++20 standard.

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This change is needed to use char8_t when building libc++.
Using the same standard in libc++abi for coherence.

See https://reviews.llvm.org/D91517.

Reviewed By: ldionne, #libc, #libc_abi

Differential Revision: https://reviews.llvm.org/D91691
This commit is contained in:
Marek Kurdej 2020-11-22 15:56:39 +01:00
parent 29dffb0c8a
commit 3b625060fc
2 changed files with 8 additions and 8 deletions
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8
libcxx/CMakeLists.txt
View File

@ -514,11 +514,11 @@ remove_flags(-Wno-pedantic -pedantic-errors -pedantic)
# Required flags ==============================================================
function(cxx_add_basic_build_flags target)
# Require C++17 for all targets. C++17 is needed to use aligned allocation
# in the dylib.
# Require C++20 for all targets. C++17 is needed to use aligned allocation
# in the dylib. C++20 is needed to use char8_t.
set_target_properties(${target} PROPERTIES
CXX_STANDARD 17
CXX_STANDARD_REQUIRED YES
CXX_STANDARD 20
CXX_STANDARD_REQUIRED NO
CXX_EXTENSIONS NO)
# When building the dylib, don't warn for unavailable aligned allocation

8
libcxxabi/src/CMakeLists.txt
View File

@ -174,9 +174,9 @@ if (LIBCXXABI_ENABLE_SHARED)
CXX_EXTENSIONS
OFF
CXX_STANDARD
17
20
CXX_STANDARD_REQUIRED
ON
OFF
COMPILE_FLAGS
"${LIBCXXABI_COMPILE_FLAGS}"
LINK_FLAGS
@ -241,9 +241,9 @@ if (LIBCXXABI_ENABLE_STATIC)
CXX_EXTENSIONS
OFF
CXX_STANDARD
17
20
CXX_STANDARD_REQUIRED
ON
OFF
COMPILE_FLAGS
"${LIBCXXABI_COMPILE_FLAGS}"
LINK_FLAGS