OK, here we go straight from the begining:
Its a quick guide how i TRIED to build proper lazarus on newest nightlies [and how i failed miserably in half way :/]. I need some help with haiku quirks before i’ll give up on haiku completely. I think it is my last attempt… 
I used latest nightly gcc2h [10 may 2015 - hrev49160] and installed additional gcc + qt4 + qt4 dev using pkgman required to compile LAZARUS
1). I downloaded ftp://gd.tuwien.ac.at/languages/pascal/fpc/dist/2.6.4/i386-haiku/fpc-2.6.4.i386-haiku.tar
2). Unpacked and from terminal and started ./install.sh from terminal
3). When asked i selected /boot/home/config/non-packaged and installed with all options
here i tested that fpc is fully working: i typed ppc386 and get positive answer.
4). Downloaded from http://users.telenet.be/Jan.Van.hijfte/qtforfpc/fpcqt4.html
file: http://users.telenet.be/Jan.Van.hijfte/qtforfpc/V2.5/qt4pas-V2.5_Qt4.5.3.tar.gz and unpacked it
5). To build qt4pas i needed to switch arch’s to gcc4 by using: “setarch x86” from terminal
6). Then i i typed from terminal in qt4pas dir: “qmake” and "make"
7) I created libQt4pas.so.* libraries [because i used gcc4 these libs are for gcc4h/gcc4/gcc2h architectures]
and now i’m on the crossroads because:
I tried to create a hpkg lib to use with qt’s libs while compilation but:
i failed to make a hpkg’s for qt4pas. eg. i think i properly created the package using .packageInfo with this content:
//
name qt4pas
version 2.5-1
architecture x86
summary "qt4pas"
description "The Free Pascal Qt4 binding allows Free Pascal to interface with the C++ Library Qt."
packager "StreaK str@go2.pl"
vendor "Haiku Project"
licenses {
“MIT”
}
copyrights {
“Copyright © 2015 by Jan Van Hijfte test@example.com”
}
provides {
qt4pas = 2.5-1
lib:qt4pas = 2.5-1
}
requires {
haiku >= r1~alpha4_pm_hrev46213-1
}
urls {
“http://users.telenet.be/Jan.Van.hijfte/qtforfpc/fpcqt4.html/”
}
source-urls {
“Download http://users.telenet.be/Jan.Van.hijfte/qtforfpc/V2.5/qt4pas-V2.5_Qt4.5.3.tar.gz”
}
and with this dir structure:
> develop
--> lib
----> x86
------> libQt4pas.so
------> libQt4pas.so.5
------> libQt4pas.so.5.2
------> libQt4pas.so.5.2.5
.PackageInfo
and using this command: package create -C qt4pas-release qt4pas-2.5-1-x86.hpkg
When i try to install it into system im getting info: that this hpkg cant be installed on this system 
image: http://oi58.tinypic.com/180n80.jpg
EDIT 1:
After puckipedia suggestions i modified the .packageInfo file with:
name qt4pas
version 2.5-1
architecture x86_gcc2
summary "qt4pas"
description "The Free Pascal Qt4 binding allows Free Pascal to interface with the C++ Library Qt."
packager "StreaK "
vendor "Haiku Project"
licenses {
"MIT"
}
copyrights {
"Copyright (C) 2015 by Jan Van Hijfte "
}
provides {
qt4pas_x86 = 2.5-1
lib:qt4pas_x86 = 2.5-1
}
requires {
haiku >= r1~alpha4_pm_hrev46213-1
}
urls {
"http://users.telenet.be/Jan.Van.hijfte/qtforfpc/fpcqt4.html/"
}
source-urls {
"Download "
}
[the hpkg here: http://www9.zippyshare.com/v/M5BYInXC/file.html ]
[ the content of hpkg on screenshot: http://oi60.tinypic.com/t56rgi.jpg ]
- i downloaded a src lazarus version that i was sure it will be working on haiku because i compiled it on pre-PM haiku a year and half ago:
“http://sourceforge.net/projects/lazarus/files/Lazarus%20Zip%20_%20GZip/Old%20releases/Lazarus%201.0.10/lazarus-1.0.10-0.tar.gz/download”
and compiled lazarus by using these commands:
setarch x86
make LCL_PLATFORM=qt
it compiled successfull with -lQt4pas but after clicking on lazarus it complains missing qt4pas lib.
image: http://oi59.tinypic.com/34ta26p.jpg
how it can be possible if i installed this lib with hpkg and even compiled lazarus using it. Without qt4pas lib i cant build lazarus , so i have no idea what’s going on 