EmbLogic's Blog


Static libraries are collection of ordinary object files. For a static library, the actual code is extracted from the library by the linker and used to build the final executable at the point you compile/build your application.
1.Creates .c file, that contains functions in your library and application.
2.Create object file.eg
gcc -c add.c -o add.o
//-c means to create an intermediary object file, rather than an executable.
3.Create static library.This step is to bundle multiple object files in one static library.
ar rcs libststlib.a add.o sub.o
//r means to insert with replacement, c means to create a new archive,
and s means to write an index.
NOTE: A static library must start with ‘lib’ and have the suffix ‘.a’.
4.Making Executable and linking with library.
gcc -o operation operation.o -L. -lststlib
Note: -L. is used to tell that the static library is in current folder or you can provide the path too.
-l searches for the library named library at the time of linking. Linker searches and processes libraries and object files in the order they are specified.
5. Run the program.

1.You can see the list of object files in your library using
ar -t libststlib.a
2.ar is archive is single file holding a collection of other files.
Screenshot from 2014-11-11 04_20_32

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