描述

 
在ubuntun系统上使用clion开发c程序, cmake如何引入jansson库.
 

下载jansson

 
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wget http://digip.org/jansson/releases/jansson-2.13.tar.gz
 
tar -xvf
 

编译jansson

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cd jansson-2.13
mkidr build
cd build
cmake ../
make
 

查看编译结果

 
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├── include
│      ├── jansson_config.h
│      └── jansson.h
├── lib
│     └── libjansson.a
 
 

clion创建C程序

File->New->Project->选中"C Executable"
 

CMakeLists.txt引用jansson

 
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cmake_minimum_required(VERSION 3.22)
project(demo_task C)
 
set(CMAKE_C_STANDARD 11)
 
#自定义库, jansson放在了source目录下
set(LIBHOME "/home/xxx/workspace/source/")
 
# jansson
include_directories(${LIBHOME}/jansson-2.13/build/include)
link_directories(${LIBHOME}/jansson-2.13/build/lib)
link_libraries(jansson)
 
add_executable(demo_task main.c)
 

main.c使用jansson

 
创建demo.json并放入任意json数据, jansson读取demo.json,并打印结果
 
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#include <stdio.h>
#include <jansson.h>
 
int main() {
    json_t *json;
    json_error_t error;
 
    json = json_load_file("../demo.json", 0, &error);
    if(!json) {
        /* the error variable contains error information */
    }
    char *result = json_dumps(json, 0);
    printf("%s\n", result);
    free(result);
 
    return 0;
}
 
 

运行

 
clion运行并查看结果