Solved

Sample Make file for Solaris gcc shared library

Posted on 2001-07-10
7
774 Views
Last Modified: 2013-12-05
I am looking for simple working example of a sample makefile which will compile a simple c file into a shared library using the gcc compiler on solaris. using ELF format


// sample program to create a libary

#include <stdio.h>

void ExecuteRequest(void)
{
    printf("Invoked application exported function\n");
}

thanks
Matthew
0
Comment
Question by:MJUNG
  • 4
  • 3
7 Comments
 
LVL 5

Expert Comment

by:garboua
ID: 6270447
all:
<tab> gcc -c ExeccuteRequest.c
<tab> ar -cr libYourLibName.a ExeccuteRequest.o

this is a very simple makefile to create LibYourLibName.a
the first "lib" in library name is a Must.
you can use the following if you have more than one file to populate the library.

FILES = one.c \
         two.c \
         three.c \
         another.c
OBJS = (FILES.c=.o)

.c.o:
<tab> gcc -c $< -o $@
then you can
ar -cr libYourLibName.a $(OBJS)
which will take all you object files and stick em into the library.  now OBJS is build depending on FILES. and the .c.o: will know how to produce each obj.  
0
 

Author Comment

by:MJUNG
ID: 6270462
Hello Garboua

I am look ing for one that produces a shared library
using the -fPIC ELF format ? Do I still need to use the ar ?
Matthew

0
 
LVL 5

Expert Comment

by:garboua
ID: 6270537
NO,
you do this
"gcc -shared -fPIC ExeccuteRequest.c -o libMySTUFF.so"
sorry should have read better.
0
Master Your Team's Linux and Cloud Stack

Come see why top tech companies like Mailchimp and Media Temple use Linux Academy to build their employee training programs.

 

Author Comment

by:MJUNG
ID: 6270557
Another Question

You stated that the name of the library must begin with the literal lib. Why is this ?
0
 
LVL 5

Accepted Solution

by:
garboua earned 200 total points
ID: 6270627
when you link you will do something like this
"gcc mainDriver.o -lMySTUFF -o OUTPUT"
and the linker knows to look for something that begins with lib-MySTUFF-.extension ".a .so"
so there is no Way around that, it is just the way of the Penguins :-)
Take a look under /lib and /usr/lib and you will see all libraries begin with "lib" and then the extension.
CIAO
0
 

Author Comment

by:MJUNG
ID: 6270636
Ok thanks for your help
I will do some more reading
but your help is greatly apprciated!
0
 
LVL 5

Expert Comment

by:garboua
ID: 6270706
:-)
"man ld" will give you libraries option and how to include them, the difference between "-L" and "-l" etc etc
the Most single Important Document that you can have is
http://www.linuxguru.com/docs/howto/GCC-HOWTO
search for ELF and you will find TONS of info, more than you might need. it also include info about other stuff. a very good document.  short sweet to the points.
0

Featured Post

Master Your Team's Linux and Cloud Stack!

The average business loses $13.5M per year to ineffective training (per 1,000 employees). Keep ahead of the competition and combine in-person quality with online cost and flexibility by training with Linux Academy.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Attention: This article will no longer be maintained. If you have any questions, please feel free to mail me. jgh@FreeBSD.org Please see http://www.freebsd.org/doc/en_US.ISO8859-1/articles/freebsd-update-server/ for the updated article. It is avail…
The purpose of this article is to fix the unknown display problem in Linux Mint operating system. After installing the OS if you see Display monitor is not recognized then we can install "MESA" utilities to fix this problem or we can install additio…
Learn how to get help with Linux/Unix bash shell commands. Use help to read help documents for built in bash shell commands.: Use man to interface with the online reference manuals for shell commands.: Use man to search man pages for unknown command…
Learn how to navigate the file tree with the shell. Use pwd to print the current working directory: Use ls to list a directory's contents: Use cd to change to a new directory: Use wildcards instead of typing out long directory names: Use ../ to move…

778 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question