.so 依赖目录 cmake

cmake前言

首先允许开发者编写一种平台无关的 CMakeList.txt 文件来定制整个编译流程，然后再根据目标用户的平台进一步生成所需的本地化 Makefile 和工程文件，如 Unix 的 Makefile 或 Windows 的 Visual Studio 工程。从而做到“Write once, run everywhere”。显然，CMake 是一个比上述几种 make 更高级的编译配置工具。一些使用 CMake 作为项目架构系统的知名开源项目有 VTK、ITK、KDE、OpenCV、OSG 等。我是受够了手写makefile。

cmake标准三步走

mkdir src
cd build，mkdir build, create cMakeLists.txt
cd build&& cmake ..
make clean && make

为啥呢？因为cmake不支持清空缓存=手动狗头=。如果要删除缓存，直接删除build即可

cmake模板

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# CMake 最低版本号要求cmake_minimum_required(VERSION 2.8)# 项目名称project("cmake_test")# 添加预编译选项, 如使用-D定义宏等等ADD_DEFINITIONS(    "-DMY_BIG"    "-DYOU_LITTLE")# 添加编译选项add_compile_options(    "-std=c++11"    "-g3"    "-Wall"    "-Wextra")# 添加链接选项#set(CMAKE_EXE_LINKER_FLAGS "-Wl,rpath=./lib")# 添加头文件路径, 相当于g++的-Iinclude_directories(    "./include"    "./include/jansson")# 指定库文件路径, 相当于g++的-L(必须使用绝对路径)link_directories(    "/root/projects/cmake_test/lib")# 指定库文件, 相当于g++的-l(必须使用绝对路径)link_libraries(    "libjansson.a")# 查找指定目录下的所有源文件aux_source_directory("." DIR_MAIN)aux_source_directory("./func_001" DIR_FUNC_001)aux_source_directory("./func_002" DIR_FUNC_002)# 指定生成目标add_executable(    "cmake_test.out"    ${DIR_MAIN}    ${DIR_FUNC_001}    ${DIR_FUNC_002})

实际例子

单个源码文件

源码

#includeint main(){        printf("helloworld\n");}

makefile

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# CMake 最低版本号要求cmake_minimum_required (VERSION 2.8)# 项目信息project (Helloworld)# 指定生成目标add_executable(Hellworld helloworld.c)

运行

单个文件依赖外部头文件

源码

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#include #include #include #include#include "base64.h"#define LEN_OF_KEY 24int tripleDesDecrypt(const char * key1,const char *pInEncrypt,char *pOutDecrypt,int* outDecryptLen ){        if(NULL==key1||NULL==pInEncrypt){                return -1;        }        unsigned char iv[8] = { '0','0','0','0','0','0','0','0' };        DES_key_schedule des_key1;        DES_key_schedule des_key2;        DES_key_schedule des_key3;        const_DES_cblock key_SSL1, key_SSL2, key_SSL3;        DES_cblock ivec;        int key_len;        unsigned char key_value[LEN_OF_KEY]={0}; /* 补齐后的密钥 */        /* 构造补齐后的密钥 */    key_len = strlen(key1);    memcpy(key_value, key1, key_len);    memset(key_value + key_len, 0, LEN_OF_KEY - key_len);        memcpy(&key_SSL1, key_value, (size_t)8);        memcpy(&key_SSL2, key_value+8, (size_t)8);        memcpy(&key_SSL3, key_value+16, (size_t)8);        DES_set_key_unchecked(&key_SSL1, &des_key1);        DES_set_key_unchecked(&key_SSL2, &des_key2);        DES_set_key_unchecked(&key_SSL3, &des_key3);        memcpy(ivec, iv, sizeof(iv));         unsigned char nobase64_buff[1024*64]={0};    int len = 0;        len=  Base64Decode(pInEncrypt, strlen(pInEncrypt), (char*)nobase64_buff, sizeof(nobase64_buff), BASE64_FLAG_NO_PADDING | BASE64_FLAG_NO_WRAP | BASE64_FLAG_URL_SAFE);        DES_ede3_cbc_encrypt( nobase64_buff, (unsigned char*)pOutDecrypt,len, &des_key1, &des_key2, &des_key3,&ivec,DES_DECRYPT);         unsigned char buwei = pOutDecrypt[len-1];    printf("srcData=%s,buwei=%d,len=%d\n",pOutDecrypt,buwei,len);      pOutDecrypt[len - buwei] = 0;        *outDecryptLen=len-buwei;        return 0;}int main(){        /* 加载算法 */         int outLen=0;         char outData[512]={0};          tripleDesDecrypt("121221","npOUnPD1DKH1rWZ2Pgl-Iw",outData,&outLen );        printf("outData=%s\noutlen=%d\n",outData,outLen);                    tripleDesDecrypt("121221","yLIJLMDOiVrDnj8tX6FNeg",outData,&outLen );        printf("outData=%s\noutlen=%d\n",outData,outLen);         printf("-------------2---------------\n");          tripleDesDecrypt("121221","DyORM6-lGeY",outData,&outLen );        printf("outData=%s\noutlen=%d\n",outData,outLen);                    tripleDesDecrypt("121221","wjJqjcnzDJKmsR3uM98f3w",outData,&outLen );           printf("outData=%s\noutlen=%d\n",outData2,outLen);           return 0;}

cmake文件

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#最低版本cmake_minimum_required(VERSION 2.8)#项目名称project("3des_test")add_compile_options(    "-g"    "-Wall")include_directories(    "./")link_directories(    "/root/openssl")link_libraries(    ":libcrypto.so")#表示当前路径源文件aux_source_directory("." DIR_MAIN)add_executable( "3des.out"  ${DIR_MAIN})

一次输出多个可执行文件时

例如上文，我除了要输出3descbc之外，我还要输出3des的ecb，我们可以将源码文件放在两个目录下

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#最低版本cmake_minimum_required(VERSION 2.8)#项目名称project("3des_test")add_compile_options(    "-g"    "-Wall")include_directories(    "./")link_directories(    "/root/openssl")link_libraries(    ":libcrypto.so")#表示当前路径源文件aux_source_directory("." DIR_MAIN)aux_source_directory("./3desecd" DIR_ECB)add_executable( "3descbc.out"  ${DIR_MAIN})add_executable( "3desecb.out"  ${DIR_ECB})

其他

cmake默认环境变量

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cmake_minimum_required(VERSION 3.2)message(STATUS "CMAKE_C_FLAGS = " ${CMAKE_C_FLAGS})message(STATUS "CMAKE_C_FLAGS_DEBUG = " ${CMAKE_C_FLAGS_DEBUG})message(STATUS "CMAKE_C_FLAGS_MINSIZEREL = " ${CMAKE_C_FLAGS_MINSIZEREL})message(STATUS "CMAKE_C_FLAGS_RELEASE = " ${CMAKE_C_FLAGS_RELEASE})message(STATUS "CMAKE_C_FLAGS_RELWITHDEBINFO = " ${CMAKE_C_FLAGS_RELWITHDEBINFO})message(STATUS "CMAKE_CXX_FLAGS = " ${CMAKE_CXX_FLAGS})message(STATUS "CMAKE_CXX_FLAGS_DEBUG = " ${CMAKE_CXX_FLAGS_DEBUG})message(STATUS "CMAKE_CXX_FLAGS_MINSIZEREL = " ${CMAKE_CXX_FLAGS_MINSIZEREL})message(STATUS "CMAKE_CXX_FLAGS_RELEASE = " ${CMAKE_CXX_FLAGS_RELEASE})message(STATUS "CMAKE_CXX_FLAGS_RELWITHDEBINFO = " ${CMAKE_CXX_FLAGS_RELWITHDEBINFO})message(STATUS "CMAKE_EXE_LINKER_FLAGS = " ${CMAKE_EXE_LINKER_FLAGS})message(STATUS "CMAKE_EXE_LINKER_FLAGS_DEBUG = " ${CMAKE_EXE_LINKER_FLAGS_DEBUG})message(STATUS "CMAKE_EXE_LINKER_FLAGS_MINSIZEREL = " ${CMAKE_EXE_LINKER_FLAGS_MINSIZEREL})message(STATUS "CMAKE_EXE_LINKER_FLAGS_RELEASE = " ${CMAKE_EXE_LINKER_FLAGS_RELEASE})message(STATUS "CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO = " ${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO})message(STATUS "CMAKE_MODULE_LINKER_FLAGS = " ${CMAKE_MODULE_LINKER_FLAGS})message(STATUS "CMAKE_MODULE_LINKER_FLAGS_DEBUG = " ${CMAKE_MODULE_LINKER_FLAGS_DEBUG})message(STATUS "CMAKE_MODULE_LINKER_FLAGS_MINSIZEREL = " ${CMAKE_MODULE_LINKER_FLAGS_MINSIZEREL})message(STATUS "CMAKE_MODULE_LINKER_FLAGS_RELEASE = " ${CMAKE_MODULE_LINKER_FLAGS_RELEASE})message(STATUS "CMAKE_MODULE_LINKER_FLAGS_RELWITHDEBINFO = " ${CMAKE_MODULE_LINKER_FLAGS_RELWITHDEBINFO})message(STATUS "CMAKE_SHARED_LINKER_FLAGS = " ${CMAKE_SHARED_LINKER_FLAGS})message(STATUS "CMAKE_SHARED_LINKER_FLAGS_DEBUG = " ${CMAKE_SHARED_LINKER_FLAGS_DEBUG})message(STATUS "CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL = " ${CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL})message(STATUS "CMAKE_SHARED_LINKER_FLAGS_RELEASE = " ${CMAKE_SHARED_LINKER_FLAGS_RELEASE})message(STATUS "CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO = " ${CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO})message(STATUS "CMAKE_STATIC_LINKER_FLAGS = " ${CMAKE_STATIC_LINKER_FLAGS})message(STATUS "CMAKE_STATIC_LINKER_FLAGS_DEBUG = " ${CMAKE_STATIC_LINKER_FLAGS_DEBUG})message(STATUS "CMAKE_STATIC_LINKER_FLAGS_MINSIZEREL = " ${CMAKE_STATIC_LINKER_FLAGS_MINSIZEREL})message(STATUS "CMAKE_STATIC_LINKER_FLAGS_RELEASE = " ${CMAKE_STATIC_LINKER_FLAGS_RELEASE})message(STATUS "CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO = " ${CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO})

CMake显示gcc/g++的详细编译信息

`12`	`make的时候, 使用如下命令:make VERBOSE=1`

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.so 依赖目录 cmake_cmake浅析