# FOSDEM 2005 talk
#
# Guillem Jover <guillem@debian.org>, 2005.
#
%deffont "standard"   xfont "Arial.TTF"
%deffont "thick"      xfont "Times.TTF"
%deffont "typewriter" xfont "Cour.TTF"
%default 1 area 90 90, leftfill, size 2, fore "black", back "white", font "thick"
%default 2 size 5.7, vgap 1, prefix " "
%default 3 size 2, bar "black", vgap 10
%default 4 size 4.2, fore "black", vgap 30, prefix " ", font "standard"
%tab 1 size 4.2, vgap 08, prefix "  ", icon box "black" 50
%tab 2 size 4.2, vgap 08, prefix "  ", icon box "black" 0
%tab 3 size 3.5, vgap 08, prefix "      ", icon arc "black" 50
%tab 4 size 3.5, vgap 08, prefix "      ", icon arc "black" 0
%tab 5 size 3, vgap 40, prefix "            ", icon delta3 "black" 40
%page
%nodefault
%fore "black"
%back "white"
%size 9
%center

Porting to Debian GNU variants: Targetting POSIX instead of GNU/Linux
%size 7

%center, size 5


by Guillem Jover
%center, font "typewriter", size 4
<guillem@debian.org>

%page

Overview

	Debian GNU variants
	Build failures
	System detection (Wrong)
	Check for specific functionality (Good)
	Runtime failures
	Ideal interaction with Porters-Debian-Upstream
	Questions

%page

Debian GNU variants

	GNU/Hurd
	GNU/kFreeBSD
	GNU/kNetBSD
	GNU/Linux

%page

Build failures

	ioctls
	Limiting macros
	Optional POSIX features
	Kernel dependencies (linuxisms)
		mount
		linuxthreads abuse
	sys_errlist[] vs. strerror()

%page

System detection (Wrong)

	config.{guess,sub}
	uname
	CPP system macros
	Other system checks ...

%page

Check for specific functionality (Good)

	autoconf

%page

Runtime failures

	/proc
	/sys
	devfs on kBSD
	Missing kernel features (sysv shm)
	Hardcoded values instead of using macros (open())
	Making dirs ending with a slash '/'

%page

Ideal interaction with Porters-Debian-Upstream

	Review the patch on the porters list
	Send it to the BTS
	Wait for the Maintainer to apply the patch, upload and forward it to upstream
	Profit!

%page

Questions





%center
Guillem Jover <guillem@debian.org>