Compiling qt 4.8.4 from source - probably cached file somewhere

[mravenca]

Hello,
I have a question regarding compilation of Qt 4.8.4, however I think it is a more general question.

When I run make, the compiler complains:

make
cd /src/tools/bootstrap/ && ( test -e Makefile || /usr/bin/qmake -o Makefile /src/tools/bootstrap/bootstrap.pro ) && make -f Makefile 
Info: creating stash file /src/tools/bootstrap/.qmake.stash
make[1]: Entering directory '/src/tools/bootstrap'
g++ -c -pipe -O2 -fPIC -Wall -Wextra -DQT_BOOTSTRAPPED -DQT_LITE_UNICODE -DQT_NO_CAST_FROM_ASCII -DQT_NO_CAST_TO_ASCII -DQT_NO_CODECS -DQT_NO_DATASTREAM -DQT_NO_GEOM_VARIANT -DQT_NO_LIBRARY -DQT_NO_QOBJECT -DQT_NO_STL -DQT_NO_SYSTEMLOCALE -DQT_NO_TEXTSTREAM -DQT_NO_THREAD -DQT_NO_UNICODETABLES -DQT_NO_USING_NAMESPACE -DQT_NO_DEPRECATED -I. -I/include -I/include/QtCore -I/include/QtXml -I../../3rdparty/zlib -I/usr/lib64/qt6/mkspecs/linux-g++ -o qisciicodec.o ../../corelib/codecs/qisciicodec.cpp
In file included from ../../corelib/codecs/qisciicodec.cpp:41:
../../corelib/codecs/qisciicodec_p.h:56:10: fatal error: QtCore/qtextcodec.h: No such file or directory
   56 | #include "QtCore/qtextcodec.h"
      |          ^~~~~~~~~~~~~~~~~~~~~
compilation terminated.
make[1]: *** [Makefile:446: qisciicodec.o] Error 1
make[1]: Leaving directory '/src/tools/bootstrap'

I edited ../../corelib/codecs/qisciicodec_p.h line 56 and changed it to #include "qtextcodec.h" which should be accessible.
However, when I run make again, it still complains about the same error.

Did I forget to delete some cache files?

Thank you!
Vaclav

[SGaist]

Hi,

One thing that stands out is the build path (/src/tools/bootstrap/), it does not look correct.
Where did you decompress the sources ?
How did you call configure ?
Are you doing an out of source build ?
If the answer to the last question is no, then start from a fresh Qt source and use an out of source build. It will simplify things.
By the way, why do you need Qt 4 ? It has reached end of life almost a decade ago.

[mravenca]

I decompressed the sources to ./qt-everywhere-opensource-src-4.8.4.
I called configure like this: ./configure -platform linux-g++-32.
I am not doing out of source build.
I need Qt 4 for a very old application that is still being used (for work).
The problem is that despite I changed the mentioned source file it seems that compiler doesn't see the change..

[Christian Ehrlicher]

@mravenca said in Compiling qt 4.8.4 from source - probably cached file somewhere:

I called configure like this: ./configure -platform linux-g++-32.
I am not doing out of source build.

Please do an out-of-source build with a fresh source dir.

[ChrisW67]

@mravenca My Ubuntu 24.04 with GCC 13:

$ mkdir Qt4.8.4
$ cd Qt4.8.4
$ tar xzf ~/Downloads/qt-everywhere-opensource-src-4.8.4.tar.gz
$ mkdir build
$ cd build
$ ../qt-everywhere-opensource-src-4.8.4/configure 
...
... lot of warnings about C++17 support for register storage type etc...
...

Qt is now configured for building. Just run 'gmake'.
Once everything is built, you must run 'gmake install'.
Qt will be installed into /usr/local/Trolltech/Qt-4.8.4

To reconfigure, run 'gmake confclean' and 'configure'.

Attempting the same with your -platform linux-g++-32 option requires 32-bit library support not present by default in my environment:

$  sudo apt install gcc-multilib g++-multilib

but still fails because all the other dependencies need to be present in 32-bit also.

[SGaist]

Depending on your distribution, did you consider installing Qt 4 if it still ships it ?