Linux GCC compiles dynamic class libraries (. So) and static class libraries (. a)

Linux GCC compiles dynamic class libraries (. So) and static class libraries (. a)

My compilation environment for Ubuntu desktop 16.04

One: Test code

The test has 3 files: ab.h,ab.c,test.c

//AB.hvoidhello ();//AB.C#include <stdio.h>voidHello () {printf ("Hello from AB.C \ n");}//test.c#include <stdio.h>#include"AB.h"voidMainvoid) {printf ("It is main\n"); Hello ();}

View Code

Using GCC, compile and run to display the results:

[Email protected]:~/desktop/demo$ gcc AB.C test.c
[Email protected]:~/desktop/demo$./a.out
It is main
Hello from AB.C

Second: GCC compiles the static class library. A

//compile point o file[Email protected]:~/desktop/demo$GCC-C AB.C//compile to AB.O file[Email protected]:~/desktop/demo$lsab.c AB.h ab.o a.out test.c//package as. A file[Email protected]:~/desktop/demo$ar-CRV LIBAB.A AB.O a-AB.O//Compile test program, test LIBAB.A[Email protected]:~/desktop/demo$GCC-o testliba test.c libab.a//Test procedure Testliba[Email protected]:~/desktop/demo$lsab.c AB.h ab.o a.out libab.a test.c Testliba//run the test and the output is consistent with the above[Email protected]:~/desktop/demo$./Testliba It is mainhello from AB.C [email protected]:~/desktop/demo$

Three: GCC compiles the dynamic class library. So

//compile AB.C as a dynamic class library libab.so[Email protected]:~/desktop/demo$GCC-shared-o libab.so-FPIC AB.C//View[Email protected]:~/desktop/demo$lsab.c AB.h ab.o a.out libab.a libab.so test.c Testliba//Compile the test program Testso and link the libab.so in the current directory[Email protected]:~/desktop/demo$GCC-O Testso Test.c-lab-L.//set the dynamic class library path[Email protected]:~/desktop/demo$ Export ld_library_path=.: $LD _library_path//run the test program with the results consistent with the above[Email protected]:~/desktop/demo$./Testso It is mainhello from AB.C [email protected]:~/desktop/demo$

External supply, only need to put AB.h and libab.a or libab.so can;

Reference: http://www.cnblogs.com/ymy124/archive/2012/04/13/2446434.html

Linux GCC compiles dynamic class libraries (. So) and static class libraries (. a)