On 17 August 2010 23:25, Almar Klein <almar.kl...@gmail.com> wrote:
>
>
> On 20 July 2010 03:48, Anthony Tuininga <anthony.tuini...@gmail.com>wrote:
>
>> On Mon, Jul 19, 2010 at 4:15 PM, Almar Klein <almar.kl...@gmail.com>
>> wrote:
>> > Thanks for the quick and clear answers so far. I have two more
>> questions:
>>
>> You're welcome.
>>
>> >> >> > I want to distribute an application written in python 3.1 that
>> uses
>> >> >> > the
>> >> >> > PyQt4 widget toolkit. I'd like to make the app available to as
>> many
>> >> >> > people
>> >> >> > as possible (in binary form). I've gotten it to freeze on both
>> >> >> > windows
>> >> >> > and
>> >> >> > linux (I don't own a mac). In my experience the windows-frozen
>> apps
>> >> >> > always
>> >> >> > work on windows machines, but I've no clue how well this works in
>> >> >> > Linux.
>> >> >> > Will the binaries work on *any* Linux distribution? Or only on
>> Debian
>> >> >> > derived Linuxes (I'm running Linux Mint myself)?
>> >> >>
>> >> >> On Linux the main issue is glibc which you need to make sure is "as
>> >> >> old as possible" in order to cover most of the distributions out
>> >> >> there. Glibc is backwards compatible but not forwards compatible so
>> >> >> you need to act accordingly. I generally use CentOS 5.x as that is
>> >> >> fairly old and covers most of the distributions in the past few
>> years.
>> >> >
>> >> > So you mean I'd best build the binaries on an old OS? And does this
>> >> > depend
>> >> > on how much "exotic low level stuff" I use in my application, or only
>> >> > how
>> >> > new the version is that is on my system?
>> >>
>> >> The main issue is glibc. Whatever version you are using everyone else
>> >> who will use your package needs to use that version of glibc or a more
>> >> recent one. Everything links to that library so everything stands or
>> >> falls on what version you happen to have installed. Since that package
>> >> is regularly being improved new distributions generally include newer
>> >> versions of glibc, too.
>> >
>> > Ok, fair enough. Would it also be possible to (temporarily) install an
>> old
>> > version of glibc on my current system?
>>
>> Maybe. But I wouldn't do that personally. A virtual machine is far
>> less likely to cause problems. :-)
>>
>> > You said you use CentOS 5.x since it is fairly old. If I check the
>> website
>> > v5.5 is from may 2010, which I don't consider old. All versions below
>> 5.4
>> > are not available anymore (at least not on the mirror that I checked).
>> Do
>> > you recon that the 5.5 iso old enough or should I download CentOS 4.x?
>>
>> Well, CentOS 5.5 still uses the old version of glibc so even though it
>> was recently released it is still "old". :-) Red Hat is about to
>> release version 6 which will use a newer version of glibc. I don't
>> think version 4 is worth worrying about -- that's WAY too old!
>>
>> Anthony
>>
>>
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>
>
> Just letting you know I followed your suggestion. I now've got a CentOS
> installation running in VirtualBox, with Python3.1, PyQt4 (incl. QScintilla)
> and cx_freeze. I tested the binaries on several Linuxes, and they all
> worked.
>
Just wanted to point out that in order to build an app with nice
anti-aliased fonts and to use the GTK theme in Qt, you need a few extra
things.
(on CentOS 5.5):
- yum install gtk+ gtk+-devel
- yum install gtk2 gtk2-devel
- yum install contconfig fontconfig-devel
- yum install freetype freetype-devel
And compile Qt using "./configure -fontconfig -gtkstyle".
I put a summary of the installation procedure
here<http://code.google.com/p/iep/wiki/Installation?ts=1291642093&updated=Installation#Building_the_requirements_for_IEP_from_source_on_Linux>.
It works for the specific app I'm building, but it might also be useful to
others who want to build apps using PyQt.
Cheers,
Almar
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