CMake 項目使用從 Bazel 項目構建的依賴項

Question

我有一個使用 glog（取決於 gflags）的簡單 Bazel 項目。

# WORKSPACE

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

http_archive(
    name = "com_github_gflags_gflags",
    sha256 = "34af2f15cf7367513b352bdcd2493ab14ce43692d2dcd9dfc499492966c64dcf",
    strip_prefix = "gflags-2.2.2",
    urls = ["https://github.com/gflags/gflags/archive/v2.2.2.tar.gz"],
)

http_archive(
    name = "com_github_google_glog",
    sha256 = "122fb6b712808ef43fbf80f75c52a21c9760683dae470154f02bddfc61135022",
    strip_prefix = "glog-0.6.0",
    urls = ["https://github.com/google/glog/archive/v0.6.0.zip"],
)

# BUILD

cc_binary(
    name = "main",
    srcs = ["main.cpp"],
    deps = [
        "@com_github_google_glog//:glog",
    ]
)

# main.cpp

#include <glog/logging.h>

int main() {
    LOG(INFO) << "Hello, World!";
    return 0;
}

當我運行bazel build main時，這會成功構建二進制文件。 我想在一個CMake項目中使用這個Bazel項目構建的glog + gflags依賴包含目錄和庫文件（原因有幾個這里就不細說了）。

有沒有辦法做到這一點？ 我開始部分嘗試包含 Bazel build output 中的目錄，但遇到了編譯錯誤。

cmake_minimum_required(VERSION 3.20)
project(btest)

set(CMAKE_CXX_STANDARD 14)

include_directories(/path/to/bazel-out/darwin-fastbuild/bin/external/com_github_google_glog/_virtual_includes/glog)
include_directories(/path/to/bazel-out/darwin-fastbuild/bin/external/com_github_gflags_gflags/_virtual_includes/gflags)

add_executable(main main.cpp)

但是，這會產生如下錯誤：

In file included from ../main.cpp:1:
/path/to/bazel-out/darwin-fastbuild/bin/external/com_github_google_glog/_virtual_includes/glog/glog/logging.h:122:17: error: incomplete type in call to object of type 'struct GLOG_EXPORT'
  LogMessageTime();

Answer 1

上面的錯誤似乎是編譯器無法使用從glog框架定義的類/對象。 您是否嘗試過這樣初始化並檢查。