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《CMake入门实战》源码

Home Page: http://www.hahack.com/codes/cmake/

CMake 56.70% C++ 40.07% C 3.23%

hahack cmake tutorial

cmake-demo's Introduction

Hi there

🔭 I’m currently working at Tencent.
🌱 I’m currently learning LLM.
📫 How to reach me: @潘伟洲wzpan
⭐️ Want to recommend me to others? Nominate me as a Github Star.

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cmake-demo's Issues

网站502了

大佬，这个网站502了，能看看🐎https://www.hahack.com/codes/cmake/

power function return value not correct.

double power(double base, int exponent) return with int type.
when ./Demo 2.4 2
result is 4
need to change the return type to double.

为什么demo4中， USE_MYMATH默认是ON，编译出来pow使用的标准库的函数

[me@centos Demo4]$ cmake .
-- The C compiler identification is GNU 4.8.5
-- The CXX compiler identification is GNU 4.8.5
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Configuring done
-- Generating done
-- Build files have been written to: /home/me/tmp/cmake-demo/Demo4
[me@centos Demo4]$ make
Scanning dependencies of target MathFunctions
[ 25%] Building CXX object math/CMakeFiles/MathFunctions.dir/MathFunctions.cc.o
[ 50%] Linking CXX static library libMathFunctions.a
[ 50%] Built target MathFunctions
Scanning dependencies of target Demo
[ 75%] Building CXX object CMakeFiles/Demo.dir/main.cc.o
[100%] Linking CXX executable Demo
[100%] Built target Demo
[me@centos Demo4]$ ./Demo 3 4
Now we use the standard library.
3 ^ 4 is 81
[me@centos Demo4]$

事实上，加了message("${USE_MYMATH}")能看到是ON，但是最后的链接结果使用的标准库。只有用ccmake跑一次，设置为ON或者OFF，才会真正链接或者不链接own libarary。直接cmake不知道为什么没有得到预期结果。

Demo2没法生成可执行文件

你好，我在CentOS7上克隆了你的项目，在Demo2目录里执行cmake和make后，没法生成可执行文件，不知道哪里出问题了，您那边可以吗？

demo3，cmake 3.16版本下运行，如果只是单纯将math目录中的.h和.cpp编译成静态链接库，会报 No SOURCES given to target: xxx 的错误

bug fix

Demo 4中的main.cc中的:
include
要改成
include "config"

Demo4中set(EXTRA_LIBS ${EXTRA_LIBS} MathFunctions)看不懂

if(USE_MYMATH)
    include_directories("${PROJECT_SOURCE_DIR}/math")
    add_subdirectory(math)
    set(EXTRA_LIBS ${EXTRA_LIBS} MathFunctions)
endif(USE_MYMATH)

这里面的set(EXTRA_LIBS ${EXTRA_LIBS} MathFunctions)看不懂
set(参数1 [参数2] [参数3] ...)
按理所应该是参数2是值，参数1是变量名
当set设置列表时，后面可以设置多个参数没错，参数1时变量名，参数2~n是值
这里的EXTRA_LIBS和${EXTRA_LIBS}看不懂，${EXTRA_LIBS}没声明过，不应该是空吗？这里写有什么意义？