[Linux 教學] make file link with dynamic and static libraries

轉載自 這裡 
* to build static library 

% gcc -c libtest.c -o libtest.o
% ar rcs libtest.a libtest.o

* to build dynamic library 
-fPIC option tells gcc to create position independant code which is necessary for shared libraries 

% gcc -c -fPIC libtest.c -o libtest.o
% gcc -shared -o libtest.so libtest.o

* to use static library 
% gcc -static main.c -L. -ltest -o testStatic 

* to use dynamic library 
% gcc main.c -L. -ltest -o testDynamic 

the source file of application who uses the library ltest, sould be located before -l options 

-L (no spacing after -L)
-o

-l (no spacing after -l)

@. in static link, library name is lib.a ex: libtest.a libcheckitout.a or libxxxx.a 
@. in dynamic link, library start with lib ex: libtest or libtest.so or lib…. 
gcc [options] -o 

補充說明 : 
@. 用 gcc 自製 Library