如何使用qmake和mingw构建示例cppkafka？

问题描述

我需要远离 cmake ，所以我想在 mingw 上构建 qmake 项目。请帮助我了解缺少的内容。从https://github.com/mfontanini/cppkafka

构建CPPKafka

main.cpp

#include <cppkafka/cppkafka.h>
using namespace std;
using namespace cppkafka;
int main() {
    Configuration config = {    // Create the config
        { "Metadata.broker.list","127.0.0.1:9092" }
    };
    Producer producer(config);    // Create the producer
    string message = "hey there!";    // Produce a message!
    producer.produce(MessageBuilder("my_topic").partition(0).payload(message));
    producer.flush();
    return 0;
}

.pro文件

TEMPLATE = app
CONfig += console c++14
CONfig -= app_bundle
CONfig -= qt
SOURCES += main.cpp
INCLUDEPATH += 'C:\Program Files\CppKafka\include' \
               'C:\Program Files\RdKafka\include' \
               'C:\boost_1_72_0' \
               'C:\Program Files\CppKafka\include\cppkafka'

LIBS +=  'C:\Program Files\RdKafka\bin\librdkafka.dll' \
         'C:\Program Files\RdKafka\bin\librdkafka++.dll' \
         -lpthread \
         -lz \
         -lstdc++ \
         'C:\Program Files\CppKafka\bin\libcppkafka.dll'

命令

g ++ -Wl-子系统，控制台-mthreads -o debug \ cpp_kafka_ex.exe debug / main.o“ C：\ Program Files \ RdKafka \ bin \ librdkafka.dll”“ C：\ Program Files \ RdKafka \ bin \ librdkafka ++。dll“ -lpthread -lz -lstdc ++” C：\ Program Files \ CppKafka \ bin \ libcppkafka.dll“

链接错误

debug / main.o：在函数std::unique_ptr<rd_kafka_s,cppkafka::KafkaHandleBase::HandleDeleter>::~unique_ptr()': C:/Qt/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/bits/unique_ptr.h:268: undefined reference to 中cppkafka :: KafkaHandleBase :: HandleDeleter :: operator（）（rd_kafka_s *）' collect2.exe：错误：ld返回1退出状态

cmake

include_directories(${CMAKE_CURRENT_SOURCE_DIR}/../include)
include_directories('C:\Program Files\RdKafka\include')
include_directories(C:\boost_1_72_0)

add_custom_target(examples)
macro(create_example example_name)
    string(REPLACE "_" "-" sanitized_name ${example_name})
    add_executable(${sanitized_name} EXCLUDE_FROM_ALL "${example_name}_example.cpp")
    target_link_libraries(${sanitized_name} cppkafka RdKafka::rdkafka Boost::boost Boost::program_options)
    add_dependencies(examples ${sanitized_name})
endmacro()

create_example(producer)
create_example(buffered_producer)
create_example(consumer)
create_example(consumer_dispatcher)
create_example(Metadata)
create_example(consumers_information)

解决方法

您需要将dllexport添加到struct HandleDeleter并进行重建。

在include\cppkafka\kafka_handle_base.h之前：

struct HandleDeleter {
        explicit HandleDeleter(const KafkaHandleBase* handle_base_ptr) : handle_base_ptr_{handle_base_ptr} {}
        void operator()(rd_kafka_t* handle);
    private:
        const KafkaHandleBase * handle_base_ptr_;
    };

之后：

struct CPPKAFKA_API HandleDeleter {
        explicit HandleDeleter(const KafkaHandleBase* handle_base_ptr) : handle_base_ptr_{handle_base_ptr} {}
        void operator()(rd_kafka_t* handle);
    private:
        const KafkaHandleBase * handle_base_ptr_;
    };