使用 bazel 在 aarch64 上构建 Abseil

Question

我无法使用 Bazel 构建 abseil-cpp。我直接在 arm64 上构建它。

设备：NVIDIA Jetson Xavier NX
OS: Ubuntu 18.04
CPU：6 核 NVIDIA Carmel ARM®v8.2 64 位

./example/hello_world.cc

#include <iostream>
#include <string>
#include <vector>

#include "absl/strings/str_join.h"
#include "absl/random/random.h"

int main() {
  std::vector<std::string> v = {"foo", "bar", "baz"};
  std::string s = absl::StrJoin(v, "-");

  absl::BitGen bitgen;

  std::cout << "Joined string: " << s << "\n";
  std::cout << "Number: " << absl::Uniform(bitgen, 0, 1.0) << "\n"; 

  return 0;
}

./example/BUILD

cc_binary(
  name = "hello_world",
  deps = ["@com_google_absl//absl/strings", "@com_google_absl//absl/random"],
  srcs = ["hello_world.cc"],
)

./工作空间

load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")

http_archive(
  name = "com_google_absl",
  urls = ["https://github.com/abseil/abseil-cpp/archive/98eb410c93ad059f9bba1bf43f5bb916fc92a5ea.zip"],
  strip_prefix = "abseil-cpp-98eb410c93ad059f9bba1bf43f5bb916fc92a5ea",
)

结果

ubuntu@NVIDIA-01:~/Projects/my_workspace$ bazel build //example:hello_world
DEBUG: Rule 'com_google_absl' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "aabf6c57e3834f8dc3873a927f37eaf69975d4b28117fc7427dfb1c661542a87"
DEBUG: Repository com_google_absl instantiated at:
  /home/ubuntu/Projects/my_workspace/WORKSPACE:3:13: in <toplevel>
Repository rule http_archive defined at:
  /home/ubuntu/.cache/bazel/_bazel_ubuntu/b8008d82eb65899d4e39675de40d6cec/external/bazel_tools/tools/build_defs/repo/http.bzl:336:31: in <toplevel>
INFO: Analyzed target //example:hello_world (7 packages loaded, 98 targets configured).
INFO: Found 1 target...
ERROR: /home/ubuntu/.cache/bazel/_bazel_ubuntu/b8008d82eb65899d4e39675de40d6cec/external/com_google_absl/absl/random/internal/BUILD.bazel:331:11: C++ compilation of rule '@com_google_absl//absl/random/internal:randen_hwaes_impl' failed (Exit 1): gcc failed: error executing command /usr/bin/gcc -U_FORTIFY_SOURCE -fstack-protector -Wall -Wunused-but-set-parameter -Wno-free-nonheap-object -fno-omit-frame-pointer '-std=c++0x' -MD -MF ... (remaining 31 argument(s) skipped)

Use --sandbox_debug to see verbose messages from the sandbox gcc failed: error executing command /usr/bin/gcc -U_FORTIFY_SOURCE -fstack-protector -Wall -Wunused-but-set-parameter -Wno-free-nonheap-object -fno-omit-frame-pointer '-std=c++0x' -MD -MF ... (remaining 31 argument(s) skipped)

Use --sandbox_debug to see verbose messages from the sandbox
In file included from external/com_google_absl/absl/random/internal/randen_hwaes.cc:225:0:
/usr/lib/gcc/aarch64-linux-gnu/7/include/arm_neon.h: In function 'Vector128 {anonymous}::AesRound(const Vector128&, const Vector128&)':
/usr/lib/gcc/aarch64-linux-gnu/7/include/arm_neon.h:12440:1: error: inlining failed in call to always_inline 'uint8x16_t vaesmcq_u8(uint8x16_t)': target specific option mismatch
 vaesmcq_u8 (uint8x16_t data)
 ^~~~~~~~~~
external/com_google_absl/absl/random/internal/randen_hwaes.cc:251:20: note: called from here
   return vaesmcq_u8(vaeseq_u8(state, uint8x16_t{})) ^ round_key;
          ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from external/com_google_absl/absl/random/internal/randen_hwaes.cc:225:0:
/usr/lib/gcc/aarch64-linux-gnu/7/include/arm_neon.h:12426:1: error: inlining failed in call to always_inline 'uint8x16_t vaeseq_u8(uint8x16_t, uint8x16_t)': target specific option mismatch
 vaeseq_u8 (uint8x16_t data, uint8x16_t key)
 ^~~~~~~~~
external/com_google_absl/absl/random/internal/randen_hwaes.cc:251:20: note: called from here
   return vaesmcq_u8(vaeseq_u8(state, uint8x16_t{})) ^ round_key;
          ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
At global scope:
cc1plus: warning: unrecognized command line option '-Wno-pass-failed'
Target //example:hello_world failed to build
Use --verbose_failures to see the command lines of failed build steps.
INFO: Elapsed time: 8.358s, Critical Path: 2.18s
INFO: 14 processes: 3 internal, 11 linux-sandbox.
FAILED: Build did NOT complete successfully

但是使用 CMake 构建相同的代码没有错误：

ubuntu@NVIDIA-01:~/Projects/TestProject/build$ cmake ..
-- Configuring done
-- Generating done
-- Build files have been written to: /home/ubuntu/Projects/TestProject/build

ubuntu@NVIDIA-01:~/Projects/TestProject/build$ cmake --build . --target hello_world
[  3%] Built target absl_log_severity
[  6%] Built target absl_raw_logging_internal
[  9%] Built target absl_bad_optional_access
[ 12%] Built target absl_spinlock_wait
[ 21%] Built target absl_base
[ 27%] Built target absl_throw_delegate
[ 30%] Built target absl_int128
[ 33%] Built target absl_random_internal_platform
[ 36%] Built target absl_random_internal_randen_hwaes_impl
[ 39%] Built target absl_random_internal_randen_hwaes
[ 45%] Built target absl_random_internal_randen_slow
[ 48%] Built target absl_random_internal_randen
[ 51%] Built target absl_random_seed_gen_exception
[ 57%] Built target absl_strings_internal
[ 81%] Built target absl_strings
[ 84%] Built target absl_random_distributions
[ 87%] Built target absl_random_internal_seed_material
[ 90%] Built target absl_random_internal_pool_urbg
[ 93%] Built target absl_random_seed_sequences
[100%] Built target hello_world

./CMakeLists.txt

cmake_minimum_required(VERSION 3.5)

project(my_project)

# Abseil requires C++11
set(CMAKE_CXX_STANDARD 11)

# Process Abseil's CMake build system
add_subdirectory(abseil-cpp)

add_executable(hello_world hello_world.cc)

# Declare dependency on the absl::strings library
target_link_libraries(hello_world absl::strings)
target_link_libraries(hello_world absl::random_random)

有什么解决办法吗？

Answer 1

解决方法在这里：https://github.com/abseil/abseil-cpp/pull/984

您必须等待最新版本。

使用 bazel 在 aarch64 上构建 Abseil

Build Abseil on aarch64 using bazel

c++

linux

cmake

bazel

abseil

结果