0b1639581a
When single-threaded mode is selected, all instances of the keyword `LIBC_THREAD_LOCAL` are stubbed out, similar to how it currently works on the GPU. This allows baremetal builds to avoid using thread_local. However, libcxx uses shared headers, so we need to be careful there. Thankfully, there is already an option to disable multithreading in libcxx, so a flag is added such that single-threaded mode is propagated down to libc.
23 lines
1.1 KiB
CMake
23 lines
1.1 KiB
CMake
#===--------------------------------------------------------------------===//
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#
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# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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# See https://llvm.org/LICENSE.txt for details.
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# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#
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#===--------------------------------------------------------------------===//
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if(NOT TARGET llvm-libc-common-utilities)
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set(libc_path ${CMAKE_CURRENT_LIST_DIR}/../../libc)
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if (EXISTS ${libc_path} AND IS_DIRECTORY ${libc_path})
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add_library(llvm-libc-common-utilities INTERFACE)
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# TODO: Reorganize the libc shared section so that it can be included without
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# adding the root "libc" directory to the include path.
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if (NOT(LIBCXX_ENABLE_THREADS))
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target_compile_definitions(llvm-libc-common-utilities INTERFACE LIBC_THREAD_MODE=LIBC_THREAD_MODE_SINGLE)
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endif()
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target_include_directories(llvm-libc-common-utilities INTERFACE ${libc_path})
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target_compile_definitions(llvm-libc-common-utilities INTERFACE LIBC_NAMESPACE=__llvm_libc_common_utils)
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target_compile_features(llvm-libc-common-utilities INTERFACE cxx_std_17)
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endif()
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endif()
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