C++ SPDLOG编译错误:变量或字段‘set_error_handler’声明为空

Question

我正在尝试在我的项目中使用spdlog。根据spdlog docu的说法，我只需要复制include文件夹下的文件并使用C++ 11编译器。

我将/include/spdlog文件夹复制到我的项目根文件夹中，但在尝试构建项目后出现了许多错误。一些是ff：

/home/project/Documents/project-server/spdlog/spdlog.h:46:39: error: variable or field ‘set_error_handler’ declared void
void set_error_handler(log_err_handler);
                                   ^
/home/project/Documents/project-server/spdlog/spdlog.h:46:24: error: ‘log_err_handler’ was not declared in this scope
 void set_error_handler(log_err_handler);
                    ^
In file included from /home/project/Documents/project-server/main.cpp:13:0:
/home/project/Documents/project-server/spdlog/spdlog.h:74:79: error: ‘filename_t’ does not name a type
 std::shared_ptr<logger> basic_logger_mt(const std::string& logger_name, const filename_t& filename, bool truncate = false);
                                                                           ^
/home/project/Documents/project-server/spdlog/spdlog.h:75:79: error: ‘filename_t’ does not name a type
 std::shared_ptr<logger> basic_logger_st(const std::string& logger_name, const filename_t& filename, bool truncate = false);
                                                                           ^
/home/project/Documents/project-server/spdlog/spdlog.h:80:82: error: ‘filename_t’ does not name a type
 std::shared_ptr<logger> rotating_logger_mt(const std::string& logger_name, const filename_t& filename, size_t max_file_size, size_t max_files);

我尝试在CMakeLists.txt中添加以下内容

target_include_directories(ProjectName INTERFACE spdlog)

include_directories(spdlog)

target_link_libraries(ProjectName .... -libspdlog-dev)

(我安装了libspdlog-dev)

add_subdirectory(spdlog)

但上述方法都不起作用。有人知道我怎么解决这个问题吗？非常感谢!

Answer 1

正如在spdlogs docu at the very bottom中所写的，您可以执行

find_package(spdlog CONFIG)

这为您提供了导入的接口库spdlog::spdlog，您可以使用它

target_link_library(my_library PUBLIC spdlog::spdlog)

(如spdlog/examples/CMakeLists.txt中所示)

Answer 2

解决方案是安装spdlog：

sudo apt-get install libspdlog-dev

并包括使用：

#include <spglog/spdlog.h>

我最初只是将spdlog复制到我的项目根目录，并尝试使用：

#include "spdlog/spdlog.h"