Is it possible to compile Qt 4.7.1 on Linux using gcc 3.3.3?

[hochl]

Reading the compiler website of Qt, I thought I might give compilation of Qt on my ancient Linux system a try. The gcc version is 3.3.3. After disabling QtConcurrent and WebKit in the `configure' script by setting

canBuildWebKit="no"
canBuildQtConcurrent="no"

canBuildWebKit="no"
canBuildQtConcurrent="no"

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I ran

./configure -prefix /opt/qt-embedded-lgpl-4.7.1 -prefix-install -embedded x86 -nomake examples -nomake demos && make

./configure -prefix /opt/qt-embedded-lgpl-4.7.1 -prefix-install -embedded x86 -nomake examples -nomake demos && make

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and got the following errors:

g++ -c -pipe -fno-exceptions -pthread -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -O2 -Wall -W -D_REENTRANT -fPIC -DQT_SHARED -DQT_BUILD_CORE_LIB -DQT_NO_USING_NAMESPACE -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT3_SUPPORT -DQT_MOC_COMPAT -DQT_USE_FAST_OPERATOR_PLUS -DQT_USE_FAST_CONCATENATION -DELF_INTERPRETER=\"/lib/ld-linux.so.2\" -DHB_EXPORT=Q_CORE_EXPORT -DQT_NO_DEBUG -DQT_HAVE_MMX -DQT_HAVE_SSE -DQT_HAVE_MMXEXT -DQT_HAVE_SSE2 -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -I../../mkspecs/qws/linux-x86-g++ -I. -I../../include -I../../include/QtCore -I.rcc/release-shared-emb-x86 -Iglobal -I../3rdparty/harfbuzz/src -I../3rdparty/md5 -I../3rdparty/md4 -I.moc/release-shared-emb-x86 -o .obj/release-shared-emb-x86/qregexp.o tools/qregexp.cpp
../../src/corelib/tools/qmap.h: In member function `QMap<Key, T>::iterator 
   QMap<Key, T>::insert(const Key&, const T&) [with Key = int, T = int]':
tools/qregexp.cpp:1547:   instantiated from here
../../src/corelib/tools/qmap.h:561: error: template-argument `
   QMapData::<anonymous enum>' uses anonymous type
../../src/corelib/tools/qmap.h: In member function `QMap<Key, T>::iterator 
   QMap<Key, T>::insertMulti(const Key&, const T&) [with Key = int, T = int]':
tools/qregexp.cpp:629:   instantiated from here
../../src/corelib/tools/qmap.h:597: error: template-argument `
   QMapData::<anonymous enum>' uses anonymous type
../../src/corelib/tools/qmap.h: In member function `void QMap<Key, 
   T>::detach_helper() [with Key = int, T = int]':
../../src/corelib/tools/qmap.h:202:   instantiated from `void QMap<Key, T>::detach() [with Key = int, T = int]'
tools/qregexp.cpp:559:   instantiated from here
../../src/corelib/tools/qmap.h:754: error: template-argument `
   QMapData::<anonymous enum>' uses anonymous type
../../src/corelib/tools/qmap.h: In member function `QMap<Key, T>::iterator 
   QMap<Key, T>::erase(QMap<Key, T>::iterator) [with Key = int, T = int]':
tools/qregexp.cpp:3454:   instantiated from here
../../src/corelib/tools/qmap.h:715: error: template-argument `
   QMapData::<anonymous enum>' uses anonymous type
make[1]: *** [.obj/release-shared-emb-x86/qregexp.o] Error 1
make[1]: Leaving directory `/src/qt/free/qt-everywhere-opensource-src-4.7.1/src/corelib'
make: *** [sub-corelib-make_default-ordered] Error 2

g++ -c -pipe -fno-exceptions -pthread -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -O2 -Wall -W -D_REENTRANT -fPIC -DQT_SHARED -DQT_BUILD_CORE_LIB -DQT_NO_USING_NAMESPACE -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT3_SUPPORT -DQT_MOC_COMPAT -DQT_USE_FAST_OPERATOR_PLUS -DQT_USE_FAST_CONCATENATION -DELF_INTERPRETER=\"/lib/ld-linux.so.2\" -DHB_EXPORT=Q_CORE_EXPORT -DQT_NO_DEBUG -DQT_HAVE_MMX -DQT_HAVE_SSE -DQT_HAVE_MMXEXT -DQT_HAVE_SSE2 -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -I../../mkspecs/qws/linux-x86-g++ -I. -I../../include -I../../include/QtCore -I.rcc/release-shared-emb-x86 -Iglobal -I../3rdparty/harfbuzz/src -I../3rdparty/md5 -I../3rdparty/md4 -I.moc/release-shared-emb-x86 -o .obj/release-shared-emb-x86/qregexp.o tools/qregexp.cpp
../../src/corelib/tools/qmap.h: In member function `QMap<Key, T>::iterator 
   QMap<Key, T>::insert(const Key&, const T&) [with Key = int, T = int]':
tools/qregexp.cpp:1547:   instantiated from here
../../src/corelib/tools/qmap.h:561: error: template-argument `
   QMapData::<anonymous enum>' uses anonymous type
../../src/corelib/tools/qmap.h: In member function `QMap<Key, T>::iterator 
   QMap<Key, T>::insertMulti(const Key&, const T&) [with Key = int, T = int]':
tools/qregexp.cpp:629:   instantiated from here
../../src/corelib/tools/qmap.h:597: error: template-argument `
   QMapData::<anonymous enum>' uses anonymous type
../../src/corelib/tools/qmap.h: In member function `void QMap<Key, 
   T>::detach_helper() [with Key = int, T = int]':
../../src/corelib/tools/qmap.h:202:   instantiated from `void QMap<Key, T>::detach() [with Key = int, T = int]'
tools/qregexp.cpp:559:   instantiated from here
../../src/corelib/tools/qmap.h:754: error: template-argument `
   QMapData::<anonymous enum>' uses anonymous type
../../src/corelib/tools/qmap.h: In member function `QMap<Key, T>::iterator 
   QMap<Key, T>::erase(QMap<Key, T>::iterator) [with Key = int, T = int]':
tools/qregexp.cpp:3454:   instantiated from here
../../src/corelib/tools/qmap.h:715: error: template-argument `
   QMapData::<anonymous enum>' uses anonymous type
make[1]: *** [.obj/release-shared-emb-x86/qregexp.o] Error 1
make[1]: Leaving directory `/src/qt/free/qt-everywhere-opensource-src-4.7.1/src/corelib'
make: *** [sub-corelib-make_default-ordered] Error 2

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Can anyone please tell me how I can successfully compile using gcc 3.3.3? Specifically I need to link against libstdc++.so.5 because of other system components, and a newer version like gcc 3.4.6 does already ship with libstdc++.so.6. (it works with 3.4.6, but I then get the warning

/usr/bin/ld: warning: libstdc++.so.6, needed by /opt/qt-embedded-lgpl-4.7.1/lib/libQtGui.so, may conflict with libstdc++.so.5

/usr/bin/ld: warning: libstdc++.so.6, needed by /opt/qt-embedded-lgpl-4.7.1/lib/libQtGui.so, may conflict with libstdc++.so.5

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--tst.

[SixDegrees]

You can try falling back to a much earlier version of Qt; version 3x might work with such an old compiler. But I have my doubts.

A much, much better approach would be to upgrade your system and compiler.

[vishwajeet.dusane]

I think it should work, do let us know the result and need of it

[hochl]

Thanks for the helpful remark Other suggestions?

[jotheberlock]

I'm running into this too since I'm building Qt for a QNX system where I only have gcc 3.3 available. You can fix this in the source by making sure the enumerations referenced by the compiler error are named types. For QMap I changed

'enum { LastLevel = 11, Sparseness = 3 };'

to

'enum StupidGCC3 { LastLevel = 11, Sparseness = 3 };'

in qmap.h to get it to compile. There'll probably be other occurrences of the same problem - I just found one in qchar.cpp for the enumeration containing Hangul_SBase and so on, for example.