utils/bazel/llvm-project-overlay/libc/libc_configure_options.bzl

   1 # This file is licensed under the Apache License v2.0 with LLVM Exceptions.
   2 # See https://llvm.org/LICENSE.txt for license information.
   3 # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   4
   5 """LLVM libc configuration options.
   6 The canonical list of user options is in 'libc/config/config.json'.
   7 These options are then processed by CMake and turned into preprocessor
   8 definitions. We don't have this logic in Bazel yet but the list of definitions
   9 is discoverable with the following command:
  10
  11 > git grep -hoE '\bLIBC_COPT_\\w*'  -- '*.h' '*.cpp' | sort -u
  12 """
  13
  14 # This list of definitions is used to customize LLVM libc.
  15 LIBC_CONFIGURE_OPTIONS = [
  16     # Documentation in libc/docs/dev/printf_behavior.rst
  17     # "LIBC_COPT_FLOAT_TO_STR_NO_SPECIALIZE_LD",
  18     # "LIBC_COPT_FLOAT_TO_STR_NO_TABLE",
  19     # "LIBC_COPT_FLOAT_TO_STR_USE_DYADIC_FLOAT",
  20     # "LIBC_COPT_FLOAT_TO_STR_USE_DYADIC_FLOAT_LD",
  21     # "LIBC_COPT_FLOAT_TO_STR_USE_INT_CALC",
  22     # "LIBC_COPT_FLOAT_TO_STR_USE_MEGA_LONG_DOUBLE_TABLE",
  23
  24     # Documentation in libc/src/string/memory_utils/...
  25     # "LIBC_COPT_MEMCPY_USE_EMBEDDED_TINY",
  26     # "LIBC_COPT_MEMCPY_X86_USE_REPMOVSB_FROM_SIZE",
  27     "LIBC_COPT_MEMCPY_X86_USE_SOFTWARE_PREFETCHING",
  28     "LIBC_COPT_MEMSET_X86_USE_SOFTWARE_PREFETCHING",
  29
  30     # Documentation in libc/docs/dev/printf_behavior.rst
  31     # "LIBC_COPT_PRINTF_CONV_ATLAS",
  32     # "LIBC_COPT_PRINTF_DISABLE_FIXED_POINT",
  33     # "LIBC_COPT_PRINTF_DISABLE_FLOAT",
  34     # "LIBC_COPT_PRINTF_DISABLE_INDEX_MODE",
  35     "LIBC_COPT_PRINTF_DISABLE_WRITE_INT",
  36     # "LIBC_COPT_PRINTF_HEX_LONG_DOUBLE",
  37     # "LIBC_COPT_PRINTF_INDEX_ARR_LEN",
  38     # "LIBC_COPT_PRINTF_NO_NULLPTR_CHECKS",
  39     # "LIBC_COPT_SCANF_DISABLE_FLOAT",
  40     # "LIBC_COPT_SCANF_DISABLE_INDEX_MODE",
  41     "LIBC_COPT_STDIO_USE_SYSTEM_FILE",
  42     # "LIBC_COPT_STRING_UNSAFE_WIDE_READ",
  43     # "LIBC_COPT_STRTOFLOAT_DISABLE_CLINGER_FAST_PATH",
  44     # "LIBC_COPT_STRTOFLOAT_DISABLE_EISEL_LEMIRE",
  45     # "LIBC_COPT_STRTOFLOAT_DISABLE_SIMPLE_DECIMAL_CONVERSION",
  46
  47     # Documentation in libc/src/__support/libc_assert.h
  48     # "LIBC_COPT_USE_C_ASSERT",
  49 ]