A script to create shared lib

   A good script to create shared lib

   From: http://anaturb.net/create_shared.htm

   1. With root privileges: create directories /usr/local/lib and /usr/local/include (if not exist)

   2. add pass for /usr/local/lib in file /etc/ld.so.conf (if not exists)

   3. run script: create_shared_lib.sh (text below)

      f.e. you have money.c file that is prepared for creating library "money".

      $sh create_shared_lib money

   4. copy your money.h to /usr/local/include

   5. to use your library:

      include money.h in global area of your program (#include &ltmoney.h>)

      gcc -Wall -g -o my_prog.exe my_prog.c -I/usr/local/include -lmoney

   1. Without root privileges: create directory lib and include in your $HOME directory

   2. change script's line 'mv "$libname".* /usr/local/lib/' for 'mv "$libname".* ~/lib/'

   3. comment line 'ldconfig &'

   4. run script (as I explained above)

   5. copy your header file into ~/include directory

   6. to use your library:

      include money.h in global area of your program (#include &ltmoney.h>)

      gcc -Wall -g -o my_prog.exe my_prog.c -I$HOME/include -L$HOME/lib -lmoney

create_shared_lib.sh

#!/bin/bash

ARG=1

BADARG=65

if [ "$#" -ne "$ARG" ] 

then

echo -e "\t\tUsages: `basename $0` name_of_shared_library"

exit $BADARG

fi

libname=lib"$1"

##########################################################################

# uncomment next 2 lines and comment 3-4 lines if you create C++ library #

##########################################################################

#g++ -fPIC -c "$1".cpp          

#g++ -shared -Wl,-soname,"$libname".so.1 -o "$libname".so.1.0 "$1".o

gcc -fPIC -c "$1".c

gcc -shared -Wl,-soname,"$libname".so.1 -o "$libname".so.1.0 "$1".o

ln -s "$libname".so.1.0 "$libname".so.1

ln -s "$libname".so.1 "$libname".so

echo -e "\t\tSHARED LIBRARY $libname IS CREATED"

echo -e "\t\t==================================\n"

echo

mv "$libname".* /usr/local/lib/

echo -e "\t\tldconfig is working"

ldconfig &

exit 0