Building Qt 4.8.0 on Redhat linux

ludde

Do you need WebKit? If not, you can add the configure flag -no-webkit, and Qt will be compiled without WebKit, hopefully avoiding the problem.

AcerExtensa

bq. cc1plus: warnings being treated as errors

You can try to delete -Werror flag from Makefile in /scratchvnarveka/Qt_built/qt-everywhere-opensource-src-4.8.0/src/3rdparty/webkitSource/JavaScriptCore folder

vivek.narvekar

Hello ludde and AcerExtensa,

Thanks a lot for responding.

@ ludde - I have already tried with -no-webkit option, while I was waiting for someone to reply here, and the builds were successful. I was just wondering If I am missing some prerequisites, because of which, I am getting build error in the standard Qt package.

@AcerExtensa -i will definitely give a try, to your suggestion

Weilly

Dear all,

I have the same problem. However, I need webkit. How do I do to past the error? I can not find -Werror in /scratchvnarveka/Qt_built/qt-everywhere-opensource-src-4.8.0/src/3rdparty/webkitSource/JavaScriptCore folder.

Thanks all

AcerExtensa

bq. cc1plus: warnings being treated as errors

It's definitely Werror flag somewhere. search for it:
@grep -r "Werror" /path/to/qt/3rdpart/webkit/dir@

You also can try to disable this warning:

bq. warning: lowering visibility of

add -fpermessive to Project Makefile. or a better way, add
@QMAKE_CXXFLAGS = -fpermissive@
to Qt project.pro... you also need to clean config and rerun configure.

Where is many way to diagnose and switch warnings in gcc. Read "this":http://gcc.gnu.org/onlinedocs/gcc-4.6.2/gcc/Warning-Options.html

Weilly

Dear AcerExtensa,

Thanks! I will try it

Best regards,
Weilly

Weilly

Dear AcerExtensa,

I search for it using
grep -r "Werror" ./src/3rdparty/webkit

I just found QMAKE_CXXFLAGS += -Werror in Wenkit.pri .I remove it to configure and make. I got the errror as http://developer.qt.nokia.com/forums/viewthread/14542/

So, is there anything I miss?

AcerExtensa

Which version of gcc do you have?

can you post output of following cmd:
@gcc -v@

AcerExtensa

Are you cross-compiling QT for mobile device?

bq. ./wtf/MathExtras.h:252: error: ‘std::isfinite’ has not been declared

Problem can be old gcc version, or <cmath> is not included.

Weilly

Yes. I use cross-compiling Qt for arm device.

My Deshtop PC OS:Ubuntu 10.10
Toolchian: arm-2007q1-10-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar
I modify qt-everywhere-opensource-arc-4.8.0/mkspecs/qws/linux-arm-g++/qmake.conf as below:
================================================

#qmake configuration for building with arm-linux-g++

include(../../common/linux.conf)
include(../../common/gcc-base-unix.conf)
include(../../common/g++-unix.conf)
include(../../common/qws.conf)
#modifications to g++.conf
QMAKE_CC = /usr/local/toolchain/arm-2007q1/bin/arm-none-linux-gnueabi-gcc
QMAKE_CXX = /usr/local/toolchain/arm-2007q1/bin/arm-none-linux-gnueabi-g++
QMAKE_LFLAGS = -Wl,-rpath=/home/tslib/lib
QMAKE_LINK = /usr/local/toolchain/arm-2007q1/bin/arm-none-linux-gnueabi-g++
QMAKE_LINK_SHLIB = /usr/local/toolchain/arm-2007q1/bin/arm-none-linux-guneabi-g++
#modifications to linux.conf
QMAKE_AR = /usr/local/toolchain/arm-2007q1/bin/arm-none-linux-gnueabi-ar cqs
QMAKE_OBJCOPY = /usr/local/toolchain/arm-2007q1/bin/arm-none-linux-gnueabi-objcopy
QMAKE_STRIP = /usr/local/toolchain/arm-2007q1/bin/arm-none-linux-gnueabi-strip

QMAKE_INCDIR = /home/tslib/include
QMAKE_LIBDIR = /home/tslib/lib

load(qt_config)

qt4.8.0 download from http://qt.nokia.com/downloads/embedded-linux-cpp
My configure line: ./configure -prefix PATH -embedded arm -make tools -xplatform qws/linux-arm-g++ -v -qt-mouse-tslib -I’tslib PATH’/include -L’tslib PATH’/lib -qt-gfx-vnc
gcc -v shows
gcc version 4.4.5 (Ubuntu/Linaro 4.4.4-14ubuntu5)

Thank you!

AcerExtensa

Ok, what does following cmd says:
bq. /usr/local/toolchain/arm-2007q1/bin/arm-none-linux-gnueabi-gcc -v

cross-compiling Qt is always tricky...

look in wtf/MathExtras.h file in webkit dir and ensure what <cmath> is included if not include it
@#include <cmath>@

recompile and post next compiler error...

Weilly

/usr/local/toolchain/arm-2007q1/bin/arm-none-linux-gnueabi-gcc -v
shows 4.2.0 20070413 (prerelease) (CodeSourcery Sourcery G++ Lite 2007q1-10)

Yes. wtf/MathExtras.h has already included
#include <cmath>

AcerExtensa

can you try to compile it with at least 4.5.2 cross compiled gcc version?

Weilly

Dear AcerExtensa,

I'm trying it. Wish i works.

Thanks

Regards,
Weilly

Weilly

Dear AcerExtensa,

I use arm-none-linux-gnueabi-gcc -v 4.6.1. I works. Thank you so much.

Regards,
Weilly

AcerExtensa

Happy for you :) , have fun ;)