Install SIP

Download corresponding sip package from here

Create and edit C file add.c


/* File : add.c */
int add(int x, int y) 
{  
	int g;  
	g = x + y;
	return g;
}

Create and edit SIP file add.sip

/* add.sip */
/* Define the SIP wrapper to the add library. */
%Module(name=add, language="C")
int add(int x, int y);

Compile C file to .a or .so library

# For .a library
gcc -c add.c
ar -r libadd.a add.o

# For .so library
gcc add.c -shared -fPIC -o libadd.so

Create and edit python file configure.py

import os
import sipconfig
 
# The name of the SIP build file generated by SIP and used by the build
# system.
build_file = "add.sbf"
 
# Get the SIP configuration information.
config = sipconfig.Configuration()
 
# Run SIP to generate the code.
os.system(" ".join([config.sip_bin, "-c", ".", "-b", build_file, "add.sip"]))
 
# Create the Makefile.
makefile = sipconfig.SIPModuleMakefile(config, build_file)
 
# Add the library we are wrapping.  The name doesn't include any platform
# specific prefixes or extensions (e.g. the "lib" prefix on UNIX, or the
# ".dll" extension on Windows).
makefile.extra_libs = ["add"]
 
# Generate the Makefile itself.

Generate file add.sbf and Makefile

python3 configure.py
  • Note: the Makefile should be modified for adapt dynamic and static library
  • For static library, we should set LIBS variable to full name of the library.
  • For dynamic library, we shoud add -L . at the front of the -ladd to LIBS variable

Compile and test

  • For compile: 
    make
sudo make install
  • for test, we just test it in python shell. 
    import add
add.add(2,3)
  • Done.