Embedded Linux Development Using Yocto Project Cookbook - Second Edition

Building a static library

We will build a static library, libhelloworld, from two source files, hello.c and world.c, and use it to build a hello world application. The source files for the library are presented here. The following is the code for the hello.c file:

char * hello (void) 
{ 
  return "Hello"; 
} 

This is the code for the world.c file:

char * world (void) 
{ 
  return "World"; 
} 

To build the library, follow these steps:

1. Configure the build environment:

$ source /opt/poky/2.4/environment-setup-cortexa9hf-neon-poky-linux-gnueabi

2. Compile and link the library:

$ ${CC} -c hello.c world.c$ ${AR} -cvq libhelloworld.a hello.o world.o

3. Verify the contents of the library:

$ ${AR} -t libhelloworld.a

The application source code is presented ...