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This article will explain in detail the methods of compiling and executing c programs under the Linux environment. The editor feels that it is very practical, so I share it with you for reference. I hope you can get something after reading this article.

1 compilation and execution of a single file

Create a main.c file as follows:

# include # include int main (void) {printf ("Hello world!\ n"); return 0;}

Compile:

Gcc-o main main.o

Execute:

Root@ubuntu:/ybg/python#. / mainInput an integer:10sum=55

2 compilation and execution of multiple files

Create a sum.c file as follows:

# include # include int sum (int x) {int I, result=0;for (iTuno; I 100) exit (- 1); return result;}

Create a main.c file as follows:

# include # include int main (void) {int xboarprintf ("Input an integer:\ n"); scanf ("% d", & x); printf ("sum=%d\ n", sum (x)); return 0;}

Compile

Gcc-c sum.c-fPIC-o sum.ogcc-c main.c-fPIC-o main.o

Generate an executable file named main

Gcc-o main sum.o main.o

Executive program

. / main

The execution result is the same as above.

3 using dynamic link library

Generate dynamic link library

Gcc sum.o-shared-o sum.so

Generate an executable file named main

Gcc-o main sum.o main.o

Execution

. / main

If the following error is reported, the newly generated sum.so was not found under the default dynamic link library path.

. / main: error while loading shared libraries: sum.so: cannot open shared object file: No such file or directory

Execute the following command to add the current directory to the dynamic link library to find the path environment variable

Export LD_LIBRARY_PATH=pwd:$LD_LIBRARY_PATH

Execute again

. / main

The execution result is the same as above.

4 python calls .so dynamic link library

Create a test.py file as follows:

Import ctypesso = ctypes.CDLL ('. / sum.so') print "so.sum (50) =% d"% so.sum (50)

Execution

Root@ubuntu:/ybg/python# python test.py so.sum (50) = 1275 the method of compiling and executing c program under Linux environment is shared here. I hope the above content can be helpful to everyone and learn more knowledge. If you think the article is good, you can share it for more people to see.

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