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Define new/delete in libc++ when using libcxxrt

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Always turn on LIBCXX_ENABLE_NEW_DELETE_DEFINITIONS, if libcxxrt is used
as the C++ ABI library, since libcxxrt does not provide the full set
ofnew and delete operators. In particular, the aligned versions of these
operators are completely missing. This primarily addresses builds on
FreeBSD, as this platform uses libcxxrt by default.

Also, attempt to provide a FreeBSD.cmake cache file, with hopefully sane
settings, partially copied from the Apple.cmake cache file. This needs
more work, probably some additions to ci build scripts (although I am
not aware of any 'official' FreeBSD build bots).

Reviewed By: ldionne, #libc

Differential Revision: https://reviews.llvm.org/D96720
This commit is contained in:
Dimitry Andric 2021-02-15 18:22:01 +01:00
parent 4d700fb060
commit 328261019f
2 changed files with 11 additions and 0 deletions
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2
libcxx/cmake/Modules/HandleLibCXXABI.cmake
View File

@ -121,6 +121,8 @@ elseif ("${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "libcxxrt")
if(NOT LIBCXX_CXX_ABI_INCLUDE_PATHS)
set(LIBCXX_CXX_ABI_INCLUDE_PATHS "/usr/include/c++/v1")
endif()
# libcxxrt does not provide aligned new and delete operators
set(LIBCXX_ENABLE_NEW_DELETE_DEFINITIONS ON)
setup_abi_lib(
"-DLIBCXXRT"
"cxxrt" "cxxrt" "cxxabi.h;unwind.h;unwind-arm.h;unwind-itanium.h" ""

9
libcxx/cmake/caches/FreeBSD.cmake Normal file
View File

@ -0,0 +1,9 @@
set(CMAKE_BUILD_TYPE Release CACHE STRING "")
set(CMAKE_POSITION_INDEPENDENT_CODE ON CACHE BOOL "")
set(LIBCXX_ENABLE_ASSERTIONS OFF CACHE BOOL "")
set(LIBCXX_ABI_VERSION "1" CACHE STRING "")
set(LIBCXX_ENABLE_STATIC ON CACHE BOOL "")
set(LIBCXX_ENABLE_SHARED ON CACHE BOOL "")
set(LIBCXX_CXX_ABI libcxxrt CACHE STRING "")
set(LIBCXX_ENABLE_NEW_DELETE_DEFINITIONS ON CACHE BOOL "")