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[libcxx][libc] Hand in Hand PoC with from_chars (#91651)

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Implements std::from_chars for float and double.

The implementation uses LLVM-libc to do the real parsing. Since this is
the first time libc++
uses LLVM-libc there is a bit of additional infrastructure code. The
patch is based on the
[RFC] Project Hand In Hand (LLVM-libc/libc++ code sharing)

https://discourse.llvm.org/t/rfc-project-hand-in-hand-llvm-libc-libc-code-sharing/77701
This commit is contained in:
Michael Jones
2024-10-21 15:04:06 -07:00
committed by GitHub
parent 9b7be3ebe5
commit 6c4267fb17
36 changed files with 2365 additions and 21 deletions
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14
runtimes/cmake/Modules/FindLibcCommonUtils.cmake Normal file
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#===--------------------------------------------------------------------===//
#
# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
# See https://llvm.org/LICENSE.txt for details.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#
#===--------------------------------------------------------------------===//
add_library(llvm-libc-common-utilities INTERFACE)
# TODO: Reorganize the libc shared section so that it can be included without
# adding the root "libc" directory to the include path.
target_include_directories(llvm-libc-common-utilities INTERFACE ${CMAKE_CURRENT_LIST_DIR}/../../../libc)
target_compile_definitions(llvm-libc-common-utilities INTERFACE LIBC_NAMESPACE=__llvm_libc_common_utils)
target_compile_features(llvm-libc-common-utilities INTERFACE cxx_std_17)