Setting up a development environment ...

[sunda]

Originally Posted by KevinShort

You just need to install gettext. This command will install the stuff you need to compile Qt for Kobo:

sudo apt-get install gettext autoconf libglib2.0-dev build-essential libtool libdbus-1-dev

If you're using firmware 2.4, then Qt 4.6 is the right version. In the file 'build/scripts/qt.sh', at the end of the ./configure line, make sure to add -D QT_NO_QWS_CURSOR.

YES!
thanks KevinShort that worked, finally the line "succesfully...".

I can compile all, except the Sketch!? The error is:
warning: libpng12.so.0 needed by .../qt/lib/libQtGui.so, not found (try using -rpath or -rpath-link)
and the then writes several error with:
.../qt/lib/libQtGui.so: undefined reference to 'png_read_info@PNG12_0

ending with:
collect2: ld returned 1 exit status
make: *** [CppQtExample20] Error1

Any idea how to install/link/add the missing so?

[KevinShort]

Originally Posted by sunda

YES!
thanks KevinShort that worked, finally the line "succesfully...".

I can compile all, except the Sketch!? The error is:
warning: libpng12.so.0 needed by .../qt/lib/libQtGui.so, not found (try using -rpath or -rpath-link)
and the then writes several error with:
.../qt/lib/libQtGui.so: undefined reference to 'png_read_info@PNG12_0

ending with:
collect2: ld returned 1 exit status
make: *** [CppQtExample20] Error1

Any idea how to install/link/add the missing so?

I think you can fix that by installing libpng12-dev with apt-get.

Also, I think that I was wrong in stating that firmware 2.4 uses Qt 4.6. I believe that firmware 2.0 and beyond all use Qt 4.8. I don't know if this will affect what you're trying to do, I just wanted to clarify that.

[sunda]

Originally Posted by KevinShort

I think you can fix that by installing libpng12-dev with apt-get.

Also, I think that I was wrong in stating that firmware 2.4 uses Qt 4.6. I believe that firmware 2.0 and beyond all use Qt 4.8. I don't know if this will affect what you're trying to do, I just wanted to clarify that.

I made the install but it did not help. I get the same error message. I noticed that the libpng12 is in the .../kobo/tmp/libpng-1.2.43/.libs/ and in .../kobo/fs/lib/.

Any suggestions please?
If Qt 4.8 caused, how can I upgrade it from 4.6?

[KevinShort]

Originally Posted by sunda

I made the install but it did not help. I get the same error message. I noticed that the libpng12 is in the .../kobo/tmp/libpng-1.2.43/.libs/ and in .../kobo/fs/lib/.

Any suggestions please?
If Qt 4.8 caused, how can I upgrade it from 4.6?

To get Qt 4.8 to compile, change the Qt version in build/scripts/qt.sh from 4.6.2 to 4.8.0, and add to the ./configure line in build/scripts/qt.sh:

-no-webkit -D QT_NO_QWS_CURSOR -D QT_NO_QWS_QPF2

I also had to remove the following options from qt.sh:

-qt-gif
-qt-gfx-qvfb
-qt-gfx-transformed
-qt-gfx-linuxfb
-no-mouse-pc
-no mouse-linuxtp
-no mouse-linuxinput
-no mouse-tslib
-no mouse-qvfb
-no mouse-qnx

The only thing I've used Qt for is to compile the tweaks plugin. What is this sketch program that you're trying to compile?

[sunda]

I recompiled over again (it takes time...) now with Qt4.8 but it did not help

The libQtGui.so is present in:
.../kobo/qt/lib/
so why this error message, do I miss a reference!?

I just wanted to see if I can compile the Sketch and even try to do something myself, but its hard....

[stefjan]

are you still referring to this?

Originally Posted by sunda

.../qt/lib/libQtGui.so: undefined reference to 'png_read_info@PNG12_0

the problem is that libQtGui.so refers to symbols which are defined in the libpng12.so.0

try adding this to the .pro file (of your sketch application?).

LIBS_PRIVATE += -lpng12

[sunda]

Originally Posted by stefjan

are you still referring to this?



the problem is that libQtGui.so refers to symbols which are defined in the libpng12.so.0

try adding this to the .pro file (of your sketch application?).

LIBS_PRIVATE += -lpng12

Hi stefjan,

I get this error message during Qt compiling time when calling
~/kobo/KoboLabs/build/build-all.sh
The sketch file is in the description by tonyv (I still need to get Qt compiled...).
Somehow the libpng12.so.0 is in the "fs" folder but not in the "Qt" folder

[stefjan]

Originally Posted by sunda

Somehow the libpng12.so.0 is in the "fs" folder but not in the "Qt" folder

that's "normal", everything (apart from qt) gets installed into fs (which matches the filesystem of your kobo), but qt installs itself in Qt (and on your kobo that matches with the /usr/local/Trolltech/... - or something like that, i do not have my kobo at hand)

how about adding this to the offending .pro file (you should be able to find out which one it is by looking at the output from make and cd into those directories)

LIBS_PRIVATE += -lpng12 -Wl,-rpath,<path to your fs directory>/lib -L<path to your fs directory>/lib

something like that did the trick for me.

[sunda]

Hi stefjan
Ok, that helped thanks!

[Lucas Malor]

Do you think there's a way to run the Kobo OS and programs on a virtual machine like Virtualbox directly?

[norbusan]

Hi everyone,

[FORGET THAT QUESTION - I FOUND IT MYSELF linaro ...]

<del>I would like to compile some programs (in particular openssl which is broken on the Kobo GLO since 2.6 firmware) without GUI. What do I have to do on a Debian/amd64 system.</del>

BTW, on firmware 2.10.0 the glibc has changed:
GNU C Library (Ubuntu EGLIBC 2.15-0ubuntu10) stable release version 2.15, by Roland McGrath et al.

Thanks for any pointers

Norbert

[gargo]

From the first page

Originally Posted by tonyv

A guide for kobo touch from memory
......snip....
My system is ubuntu 10.04 64bit
on kobo
>strings /lib/libc.so.6 | grep ourcery
this is what i got
GNU C Library (Sourcery G++ Lite 2010q1-202) stable release version 2.11.1, by Roland McGrath et al.
if you have a different compiler you can flash to 1.9.17 or
download your version from mentor could try
site:sourcery.mentor.com "your version" in google

And as I've found too

Originally Posted by norbusan

BTW, on firmware 2.10.0 the glibc has changed:
GNU C Library (Ubuntu EGLIBC 2.15-0ubuntu10) stable release version 2.15, by Roland McGrath et al.
Norbert

On my Kobo (bought early 2014) I get:

strings /lib/libc.so.6 | grep GNU
  GNU C Library (Ubuntu EGLIBC 2.15-0ubuntu10) stable release version 2.15,
by Roland McGrath et al.
  Compiled by GNU CC version 4.6.3. 
  GNU Libidn by Simon Josefsson

cat /proc/version
  Linux version 2.6.35.3-850-gbc67621+ (gallen@gallen-P5KPL-AM-BM) 
  (gcc version 4.4.4 (4.4.4_09.06.2010) ) 
  #617 PREEMPT Mon Apr 22 11:07:47 CST 2013

I'm wanting to compile the g_serial and g_hid modules so allow the Kobo to simulate a serial port and/or an HID through the USB port.
I've compiled for other devices before but I'm never had to setup my own development envioment before, hence the question:

To make a Development envioment for the newer C library :-
What from the first page do change, due to the different C library, do I install the EGLIBC 2.15-0ubuntu10 package, on a ubuntu 12.04LTS virtual machine and continue with the instructions at the start of this thread?
Thanks Gavin.

[FredG]

Hello,

I would like to develop an application that gets information through wifi from another PC and displays it on my Kobo Aura 6". I understand that Qt is the best choice. Could you indicate which version of QT I can use to develop from a Windows 7 PC.

Thanks for your help.