Cmake case of multiple files in a single directory

Reference: https://www.hahack.com/codes/cmake/#

There are three source files: main.cpp, MathFunctions.h, MathFunctions.cpp

File contents are as follows:

main.cpp

 1 #include <stdio.h>
 2 #include <stdlib.h>
 3 #include "MathFunctions.h"
 4 
 5 int main(int argc, char *argv[])
 6 {
 7     if (argc < 3){
 8         printf("Usage: %s base exponent \n", argv[0]);
 9         return 1;
10     }
11     double base = atof(argv[1]);
12     int exponent = atoi(argv[2]);
13     double result = power(base, exponent);
14     printf("%g ^ %d is %g\n", base, exponent, result);
15     return 0;
16 }

MathFunctions.h

1 #ifndef POWER_H
2 #define POWER_H
3 
4 extern double power(double base, int exponent);
5 
6 #endif

MathFunctions.cpp

 1  /**
 2  * power - Calculate the power of number.
 3  * @param base: Base value.
 4  * @param exponent: Exponent value.
 5  *
 6  * @return base raised to the power exponent.
 7  */
 8 double power(double base, int exponent)
 9 {
10     int result = base;
11     int i;
12 
13     if (exponent == 0) {
14         return 1;
15     }
16     
17     for(i = 1; i < exponent; ++i){
18         result = result * base;
19     }
20 
21     return result;
22 }

CMakeLists.txt reads as follows:

# CMake minimum version requirements 
cmake_minimum_required (VERSION 2.8 ) 

# Project Information 
Project (Demo2) 

# find all files in the source directory 
# and name to save DIR_SRCS variable 
aux_source_directory (. DIR_SRCS) 

# generate specified target 
add_executable (Demo $ {DIR_SRCS} )

Here need to learn is to use a variable to obtain a directory of all the source files:

aux_source_directory (. DIR_SRCS)

# Specify generate a target
add_executable (Demo $ {DIR_SRCS})

Compilation and execution results are as follows:

wmz@ubuntu:~/Desktop/testcmake1$ cmake .
-- The C compiler identification is GNU 5.4.0
-- The CXX compiler identification is GNU 5.4.0
-- 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/wmz/Desktop/testcmake1
wmz@ubuntu:~/Desktop/testcmake1$ make 
Scanning dependencies of target Demo
[ 33%] Building CXX object CMakeFiles/Demo.dir/MatnFunctions.cpp.o
[ 66%] Building CXX object CMakeFiles/Demo.dir/main.cpp.o
[100%] Linking CXX executable Demo
[100%] Built target Demo
wmz@ubuntu:~/Desktop/testcmake1$ ls
CMakeCache.txt       CMakeLists.txt  Makefile
CMakeFiles           Demo            MathFunctions.h
cmake_install.cmake  main.cpp        MatnFunctions.cpp
wmz@ubuntu:~/Desktop/testcmake1$ ./Demo 2 3
2 ^ 3 is 8

Cmake case of multiple files in a single directory

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