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279e82fca7
This reverts commit f9146ccbe940d8b8eb15e7686a511a28eb0abc6b ([libc][bazel] explicitly use system-provided errno in Bazel builds. (#130663)) This change causes problems in Bazel builds where system errno is set to non-zero before the tests even begin to run - see PR #131650 for the disucssion on how to address this.
50 lines
2.0 KiB
Python
50 lines
2.0 KiB
Python
# This file is licensed under the Apache License v2.0 with LLVM Exceptions.
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# See https://llvm.org/LICENSE.txt for license information.
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# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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"""LLVM libc configuration options.
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The canonical list of user options is in 'libc/config/config.json'.
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These options are then processed by CMake and turned into preprocessor
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definitions. We don't have this logic in Bazel yet but the list of definitions
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is discoverable with the following command:
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> git grep -hoE '\bLIBC_COPT_\\w*' -- '*.h' '*.cpp' | sort -u
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"""
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# This list of definitions is used to customize LLVM libc.
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LIBC_CONFIGURE_OPTIONS = [
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# Documentation in libc/docs/dev/printf_behavior.rst
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# "LIBC_COPT_FLOAT_TO_STR_NO_SPECIALIZE_LD",
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# "LIBC_COPT_FLOAT_TO_STR_NO_TABLE",
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# "LIBC_COPT_FLOAT_TO_STR_USE_DYADIC_FLOAT",
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# "LIBC_COPT_FLOAT_TO_STR_USE_DYADIC_FLOAT_LD",
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# "LIBC_COPT_FLOAT_TO_STR_USE_INT_CALC",
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# "LIBC_COPT_FLOAT_TO_STR_USE_MEGA_LONG_DOUBLE_TABLE",
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# Documentation in libc/src/string/memory_utils/...
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# "LIBC_COPT_MEMCPY_USE_EMBEDDED_TINY",
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# "LIBC_COPT_MEMCPY_X86_USE_REPMOVSB_FROM_SIZE",
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# "LIBC_COPT_MEMCPY_X86_USE_SOFTWARE_PREFETCHING",
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"LIBC_COPT_MEMSET_X86_USE_SOFTWARE_PREFETCHING",
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# Documentation in libc/docs/dev/printf_behavior.rst
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# "LIBC_COPT_PRINTF_CONV_ATLAS",
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# "LIBC_COPT_PRINTF_DISABLE_FIXED_POINT",
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# "LIBC_COPT_PRINTF_DISABLE_FLOAT",
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# "LIBC_COPT_PRINTF_DISABLE_INDEX_MODE",
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"LIBC_COPT_PRINTF_DISABLE_WRITE_INT",
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# "LIBC_COPT_PRINTF_HEX_LONG_DOUBLE",
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# "LIBC_COPT_PRINTF_INDEX_ARR_LEN",
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# "LIBC_COPT_PRINTF_NO_NULLPTR_CHECKS",
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# "LIBC_COPT_SCANF_DISABLE_FLOAT",
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# "LIBC_COPT_SCANF_DISABLE_INDEX_MODE",
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"LIBC_COPT_STDIO_USE_SYSTEM_FILE",
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# "LIBC_COPT_STRING_UNSAFE_WIDE_READ",
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# "LIBC_COPT_STRTOFLOAT_DISABLE_CLINGER_FAST_PATH",
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# "LIBC_COPT_STRTOFLOAT_DISABLE_EISEL_LEMIRE",
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# "LIBC_COPT_STRTOFLOAT_DISABLE_SIMPLE_DECIMAL_CONVERSION",
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# Documentation in libc/src/__support/libc_assert.h
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# "LIBC_COPT_USE_C_ASSERT",
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]
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