Error while installing Qt from source (4.7.4)

[sattu]

Hi everyone,

I am trying to install Qt for windowsXP and MinGW tool chain by compiling it from source. I followed the steps mentioned in the following link:- http://qt-project.org/wiki/Building_...ows_with_MinGW
I did as mentioned, but I am getting a strange error when I do the following step:

c:\qt-4.7.4\qt-everywhere-opensource-src-4.7.4\configure.exe -redo

The error is:-

C:\qt-4.7.4\4.7.4-qt-x86-build/include/QtCore/../../../qt-everywhere-opensource-src-4.7.4/src/corelib/tools/qbytearray.h:48:20: fatal error: string.h: No such file or directory
compilation terminated.
Makefile:306: recipe for target 'project.o' failed
mingw32-make: *** [project.o] Error 1

string.h is located in my C:\MinGW\lib\gcc\mingw32\4.7.2\include\ssp. I tried mentioning this path in configure.exe as follows:-

-I C:\MinGW\lib\gcc\mingw32\4.7.2\include

But still it's not able to find the file. Can someone please guide me as to what changes I need to do to get rid of this error?

[sattu]

This error solved. There was problem with the MinGW package.

[MtJoKe]

Could you describe, what you have changed on your MinGW environment to fix this issue?

Thanks!!

[sattu]

Hi MtJoke,
Since it has been a long time since I posted this so I don't remember the exact nature of errors that I had faced and how I solved all of them. But yes, once I was able to successfully compile Qt from source I had documented the details for my reference so that it may help me in future. Here are the steps that I had documented:-

SDK- Qt
Toolchain - Mingw32
OS - XP (x86)
3rd Party - OpenSSL (My main aim was to include OpenSSL support in Qt)

1) First of all we need to compile the openSSL from source. The best cmd for OpenSSL is MSYS command prompt. To build MSYS cmd, follow the link:-
http://www.mingw.org/wiki/MSYS (don't forget to set the PATH variable as mentioned in the link )
2) Now compile the OpenSSL and set the Env Vars required for linking with Qt during it's compilation. For that refer to :- http://qt-project.org/wiki/Compiling-OpenSSL-with-MinGW
3) Now since both MinGW and OpenSSL are ready as per Qt requirement, refer to the following link for Qt compilation:-
http://qt-project.org/wiki/Building_...ows_with_MinGW

Things to be noted (Before reading the lines below first try compiling once otherwise you will find the below lines confusing):-
While setting OPENSSL_LIBS="-lssl -lcrypto -lgdi32 -luser32" option in your configure.cache file it may throw an error as unrecognised option....for that the best option is to directly configure rather than using the cache file. I mean from the build folder type
C:\qt-4.7.4\qt-everywhere-opensource-src-4.7.4\configure.exe -platform win32-g++ -opensource -debug -debug-and-release -no-phonon -fast -nomake examples -nomake demos -no-dsp -no-vcproj -no-cetest -no-s60 -qt-sql-odbc -qt-sql-sqlite -plugin-sql-odbc -plugin-sql-sqlite -no-qt3support -no-opengl -no-openvg -no-incredibuild-xge -openssl OPENSSL_LIBS="-lssl -lcrypto -lgdi32 -luser32" -I C:\openssl-1.0.1c\dist\include -L C:\openssl-1.0.1c\dist

It should be fine. Also if you got compiling error (while building my app): «cannot find -lQtCore4», «cannot find -lQtGui4». Here is the solution that helped me - edit file "qt-sources-dir/mkspecs/win32-g++/qmake.conf". Set QMAKE_LFLAGS = -static -static-libgcc .

Some more links which may interest you:-
http://sector.ynet.sk/qt4-tutorial/preparations.html
http://code.google.com/p/qt-msvc-ins...locationTricks
http://stackoverflow.com/questions/4...after-building