Das GNU Build SystemAutotools

Roman LeshchinskyDavid Schulz, Shaoke Wu

History of autotools

1980s

Multible variants of Unix

Varios differences (even with POSIX)

Familiarity for software developers with all differences

-> more organized approach needed

Goal: Easy distribution of source code programs

SourceCode

System V

Linux

BSD

Solaris HP-UXAIX

History (2)

1992

Metaconfig, configure, GNU autoconf, Imake

Building process in two steps

Configuration - generates Makefile's

build step – using UNIX make

1994

Autoconf solid framework

But creation of large Makefile.in's nesseccary

Automake was developed

Autoconf Konzept

Probleme

configure

Konfiguration

Computer

Test

Automatische Konfiguration von Programmen

Was macht autoconf

Autoconf erzeugt configure

Input: configure.ac (oder configure.in bei aelteren Versionen )

configure.ac enthaelt Aufruf von Makros

Autoconf benutzt m4

aclocal.m4 definiert eigene Makros

configure.in

aclocla.m4

autoconfconfigure

Aufbau von configure.ac

Reihenfolge egal

AC_INIT

Source-Katalog finden

Kommando Zeilenargumente

AC_OUTPUT

Dateien generieren

AC_INIT(helloworld.c). . . AC_OUTPUT(Makefile)

Welche Tests gibt es?

Programs

Files

Library Files

Types

System Services

./configure Optionen

--prefix=<install-path> --help: alle Optionen auflisten --version: autoconf Version anzeigen

LDFLAGS: linker flags, e.g. -L<lib dir> CFLAGS C compiler flags

Shell Umgebungsvariable:

Automake

Goal: create Makefile.in Remove burden of Makefile maintenance from

individual Developer (put it on automake maintainer)

Input: Makefile.am Only make sence with autoconf Reads configure.in contents Needs perl

(configure.in)

Makefile.am automakeMakefile.in

Makefile.am

Easy to create by developer Syntax: prefix+primary Primarys: PROGRAMS, LIBRARIES, SCRIPTS Arbitrary code ## Automake comment

bin_PROGRAMS = hellohello_SOURCES = hello.c hello.h

SUBDIRS = src

Automake options

--add-missing: create some files automaticly

--copy: dont create links

--foreign: lower strictness level

--help: show options

--verbose: show files being read

--version: show automake version

Makefile.in

Created by automake out of Makefile.am

Makefile conforms with make syntax

Tags to be substituted by configure script

Overview

Create configure.ac and Makefile.am

aclocal

autoconf

Automake --add-missing

./configure

make

make install