使用bazel编译一个软件时报错，报错的信息为：
absl/base/policy_checks.h:79:2: error: #error "C++ versions less than C++14 are not supported."
整个的编译信息为：
devil@hp:~/lab$ bazel build -c opt //:deepmind_lab.so
INFO: Build option --cxxopt has changed, discarding analysis cache.
WARNING: Download from https://mirror.bazel.build/github.com/glennrp/libpng/archive/v1.6.37.zip failed: class java.io.FileNotFoundException GET returned 404 Not Found
DEBUG: Rule 'com_google_absl' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "cd8a6aed3682cd6a0330e0c11828254877531109d7bddc9398f504b314ec9128"
DEBUG: Repository com_google_absl instantiated at:
/home/devil/lab/WORKSPACE:18:13: in <toplevel>
Repository rule http_archive defined at:
/home/devil/.cache/bazel/_bazel_devil/485f2e56923c3d722a11a1d362ce5e93/external/bazel_tools/tools/build_defs/repo/http.bzl:355:31: in <toplevel>
DEBUG: Rule 'bazel_skylib' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "a9432ad1582da1dd8a2bcbbdaf11d887b38d97c226207b00471eeb2985576797"
DEBUG: Repository bazel_skylib instantiated at:
/home/devil/lab/WORKSPACE:12:13: in <toplevel>
Repository rule http_archive defined at:
/home/devil/.cache/bazel/_bazel_devil/485f2e56923c3d722a11a1d362ce5e93/external/bazel_tools/tools/build_defs/repo/http.bzl:355:31: in <toplevel>
INFO: Analyzed target //:deepmind_lab.so (0 packages loaded, 4197 targets configured).
INFO: Found 1 target...
ERROR: /home/devil/.cache/bazel/_bazel_devil/485f2e56923c3d722a11a1d362ce5e93/external/com_google_absl/absl/types/BUILD.bazel:153:11: Compiling absl/types/bad_optional_access.cc 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 -g0 -O2 '-D_FORTIFY_SOURCE=1' -DNDEBUG -ffunction-sections ... (remaining 36 arguments skipped)
Use --sandbox_debug to see verbose messages from the sandbox and retain the sandbox build root for debugging
In file included from external/com_google_absl/absl/base/config.h:86,
from external/com_google_absl/absl/types/bad_optional_access.h:26,
from external/com_google_absl/absl/types/bad_optional_access.cc:15:
external/com_google_absl/absl/base/policy_checks.h:79:2: error: #error "C++ versions less than C++14 are not supported."
79 | #error "C++ versions less than C++14 are not supported."
| ^~~~~
Target //:deepmind_lab.so failed to build
Use --verbose_failures to see the command lines of failed build steps.
INFO: Elapsed time: 0.426s, Critical Path: 0.26s
INFO: 17 processes: 17 internal.
FAILED: Build did NOT complete successfully
Google一下，找到相关资料：https://issuehint.com/issue/deepmind/lab/241
解决方案：
虽然Google出了相关的解决方法，但是这个东西到底讲的是怎么具体做还是有些不清楚，后来个人尝试了一下，有了具体的操作：
编辑home下文件.bazelrc (该文件一般都是预先不存在的，编辑后直接保存即可)
填写内容：
build --cxxopt=-std=c++14
再次执行编译，顺利通过：
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