Building Qt 4.8.0 on Redhat linux

vivek.narvekar

Hi,
I am trying to build Qt4.8.0 on Redhat linux5.4.

I get following error, while building. It seems that it is related to webkit

cd JavaScriptCore/ && gmake -f Makefile.WebKit
gmake[2]: Entering directory /scratch/vnarveka/Qt_built/qt-everywhere-opensource-src-4.8.0/src/3rdparty/webkit/Source/JavaScriptCore' g++ -c -m64 -pipe -Wall -Wextra -Wreturn-type -fno-strict-aliasing -Wcast-align -Wchar-subscripts -Wformat-security -Wreturn-type -Wno-unused-parameter -Wno-sign-compare -Wno-switch -Wno-switch-enum -Wundef -Wmissing-noreturn -Winit-self -Werror -fno-stack-protector -O3 -fvisibility=hidden -fvisibility-inlines-hidden -fPIC -D_REENTRANT -DNDEBUG -DBUILDING_QT__=1 -DNDEBUG -DQT_ASCII_CAST_WARNINGS -DBUILDING_JavaScriptCore -DBUILDING_WTF -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_NO_DEBUG -DQT_CORE_LIB -DQT_HAVE_MMX -DQT_HAVE_3DNOW -DQT_HAVE_SSE -DQT_HAVE_MMXEXT -DQT_HAVE_SSE2 -DQT_HAVE_SSE3 -DQT_HAVE_SSSE3 -DQT_SHARED -I../../../../../mkspecs/linux-g++-64 -I. -I../../../../../include/QtCore -I../../../../../include -I. -I../../Source -I../ThirdParty -Iassembler -Ibytecode -Ibytecompiler -Iheap -Idfg -Idebugger -Iinterpreter -Ijit -Iparser -Iprofiler -Iruntime -Iwtf -Iwtf/gobject -I/scratch/vnarveka/Qt_built/qt-everywhere-opensource-src-4.8.0/src/3rdparty/webkit/Source/JavaScriptCore/wtf/symbian -Iwtf/unicode -Iyarr -IAPI -IForwardingHeaders -Igenerated -I../../Source -I../../include -I/include/QtWebKit -I/include -I.moc/release-static -o .obj/release-static/YarrInterpreter.o yarr/YarrInterpreter.cpp cc1plus: warnings being treated as errors ./wtf/PassOwnPtr.h: In instantiation of 'WTF::PassOwnPtr<JSC::Yarr::ByteDisjunction>': yarr/YarrInterpreter.h:328: instantiated from here ./wtf/PassOwnPtr.h:81: warning: lowering visibility of 'WTF::PassOwnPtr<U> WTF::adoptPtr(U*) [with U = U, T = JSC::Yarr::ByteDisjunction]' to match its type ./wtf/PassOwnPtr.h: In instantiation of 'WTF::PassOwnPtr<JSC::Yarr::BytecodePattern>': yarr/YarrInterpreter.cpp:1451: instantiated from here ./wtf/PassOwnPtr.h:81: warning: lowering visibility of 'WTF::PassOwnPtr<U> WTF::adoptPtr(U*) [with U = U, T = JSC::Yarr::BytecodePattern]' to match its type gmake[2]: *** [.obj/release-static/YarrInterpreter.o] Error 1 gmake[2]: Leaving directory /scratch/vnarveka/Qt_built/qt-everywhere-opensource-src-4.8.0/src/3rdparty/webkit/Source/JavaScriptCore'
gmake[1]: *** [sub-JavaScriptCore-JavaScriptCore-pro-make_default-ordered] Error 2
gmake[1]: Leaving directory `/scratch/vnarveka/Qt_built/qt-everywhere-opensource-src-4.8.0/src/3rdparty/webkit/Source'
gmake: *** [sub-webkit-make_default-ordered] Error 2

Has anyone faced such a problem ? I had also tried building Qt4.6.4, which builds properly without any error.

Thank you for any help

Regards
vivek

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 ;)