The method of compiling and executing c Program in Linux Environment
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.
