GNU Build System

关于GNU Build System的大致介绍： GNU Build System on Wiki

GNU Build的standard targets (e.g. install/clean):   GNU make standard targets

Automake的详细描述：Automake

下面是一个使用GNU Build System创建portable package的过程例子。

Create a portable package

=================

See  Automake man docs to learn more about the format of Makefile.am and GNU build systems.

Create a source tree like below

------------------------------------

.
|-- Makefile.am
|-- scripts
|   |-- Makefile.am
|   `-- hello.sh
`-- src
    |-- Makefile.am
    `-- main.c

$ cat Makefile.am

AUTOMAKE_OPTIONS = foreign
SUBDIRS = src scripts

$ cat scripts/Makefile.am

bin_SCRIPTS = hello.sh

$ cat scripts/hello.sh

#!/bin/bash
echo "hello"

$ cat src/Makefile.am

CFLAGS = -Wall -O2
LDFLAGS = -lpthread

bin_PROGRAMS = main

main_SOURCES = main.c
 
    
 
    
 
   

Run autoscan

---------------

Autoscan scans the source files and Makefile.am, it does:

1. check which libraries are required

2. check which header files are required

Move the generated configure.scan to configure.ac and add the following lines after AC_INIT (also revise AC_INIT).

AC_INIT([hello], [0.1], [[email protected]])
AM_INIT_AUTOMAKE(hello, 0.1)

Run aclocal

-------------

It generates aclocal.m4 and autom4te.cache from configure.ac

Run autoheader

------------------

It generates config.h.in from configure.ac

Run automake

----------------

$ automake --add-missing

It generates Makefile.in from Makefile.am and config.h.in

RUn autoconf

---------------

It generates script @configure from autom4te.cache?

Compile the program

------------------------

$./configure && make

When running ./configure, config.status is generated. Actually ./configure invokes config.status to generate Makefile, so you can run config.status to re-create Makefiles.