Rebuilding Android Qt with Linaro GCC 4.6.2.

[BogDan]

Hey,

Fixed : http://commits.kde.org/android-qt/b28ef4d8223c46cd3cb6e0f39ccd5adc958eece7

Cheers,
BogDan.



>________________________________
> From: mingw android <mingw.android at gmail.com>
>To: necessitas-devel at kde.org 
>Sent: Tuesday, December 6, 2011 3:01 PM
>Subject: Rebuilding Android Qt with Linaro GCC 4.6.2.
> 
>Hi guys,
>
>I sent this email to BogDan, but really, this list is a more
>appropriate place for it (and Gmail and Yahoo don't like talking to
>each other sometimes, so I don't think he's getting my emails
>delivered promptly).
>
>Sorry this is a bit long-winded! I managed to track down (on Linux)why
>Qt Android doesn't build correctly with Linaro GCC 4.6.2 finally (btw
>I released to the ndk mailing list the newest versions with
>important neon fixes)... It's important that I get the 4.6.2 build
>working and tested as neon will probably never work properly in 4.4.3,
>plus 4.6.2 brings all sorts of other niceness (Cloog/Graphite + auto
>parallelism).
>
>On Ubuntu Linux GCC 4.6.1 Host Qt build works, here's a snippet of the commands:
>pushd /usr/nec/shared-build/src/corelib
>rm .moc/release-shared/moc_qabstractanimation.cpp
>make
>
>...executes...
>
>/usr/nec/shared-build/bin/moc -DQT_SHARED -DQT_BUILD_CORE_LIB
>-DQT_NO_USING_NAMESPACE -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS
>-DQT_MOC_COMPAT -DQT_USE_FAST_OPERATOR_PLUS
>-DQT_USE_FAST_CONCATENATION -DELF_INTERPRETER=\"/lib/ld-linux.so.2\"
>-DQLIBRARYINFO_EPOCROOT -DHB_EXPORT=Q_CORE_EXPORT -DQT_NO_DEBUG
>-DQT_HAVE_MMX -DQT_HAVE_3DNOW -DQT_HAVE_SSE -DQT_HAVE_MMXEXT
>-DQT_HAVE_SSE2 -DQT_HAVE_SSE3 -DQT_HAVE_SSSE3 -DQT_HAVE_SSE4_1
>-DQT_HAVE_SSE4_2 -DQT_HAVE_AVX -D_LARGEFILE64_SOURCE
>-D_LARGEFILE_SOURCE -I/usr/nec/qt-src/mkspecs/linux-g++
>-I/usr/nec/qt-src/src/corelib -I../../include -I../../include/QtCore
>-I.rcc/release-shared -Iglobal -I/usr/nec/qt-src/tools/shared
>-I/usr/nec/qt-src/src/3rdparty/harfbuzz/src
>-I/usr/nec/qt-src/src/3rdparty/md5 -I/usr/nec/qt-src/src/3rdparty/md4
>-I.moc/release-shared -I.
>/usr/nec/qt-src/src/corelib/animation/qabstractanimation.h -o
>.moc/release-shared/moc_qabstractanimation.cpp
>
>
>
>Android Linaro 4.6.2 Qt build fails:
>pushd /usr/nec/unstable/Android/Qt/480/build-armeabi/src/corelib
>rm .moc/release-shared/moc_qabstractanimation.cpp
>make
>
>...executes...
>
>/usr/nec/unstable/Android/Qt/480/build-armeabi/bin/moc -DQT_SHARED
>-DQT_NO_CORESERVICES -DQT_BUILD_CORE_LIB -DQT_NO_USING_NAMESPACE
>-DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT_MOC_COMPAT
>-DQT_USE_QSTRINGBUILDER -DQLIBRARYINFO_EPOCROOT
>-DHB_EXPORT=Q_CORE_EXPORT -DQT_NO_DEBUG
>-I/usr/nec/unstable/Android/Qt/480/qt-src/mkspecs/android-g++
>-I/usr/nec/unstable/Android/Qt/480/qt-src/src/corelib -I../../include
>-I../../include/QtCore -I.rcc/release-shared -Iglobal
>-I/usr/nec/unstable/Android/Qt/480/qt-src/tools/shared
>-I/usr/nec/unstable/Android/Qt/480/qt-src/src/3rdparty/harfbuzz/src
>-I/usr/nec/unstable/Android/Qt/480/qt-src/src/3rdparty/md5
>-I/usr/nec/unstable/Android/Qt/480/qt-src/src/3rdparty/md4
>-I.moc/release-shared
>-I/usr/nec/unstable/Android/Qt/480/build-armeabi/src/corelib/.rcc/release-shared
>-I/usr/nec/android-ndk-r6b/platforms/android-5/arch-arm/usr/include
>-I/usr/nec/android-ndk-r6b/sources/cxx-stl-4.6.2/gnu-libstdc++/include
>-I/usr/nec/android-ndk-r6b/sources/cxx-stl-4.6.2/gnu-libstdc++/libs/armeabi/include
>-I. /usr/nec/unstable/Android/Qt/480/qt-src/src/corelib/animation/qabstractanimation.h
>-o .moc/release-shared/moc_qabstractanimation.cpp
>...and fails...
>usr/nec/android-ndk-r6b/sources/cxx-stl-4.6.2/gnu-libstdc++/include/bits/stl_relops.:68:
>Parse error at "std"
>make: *** [.moc/release-shared/moc_qabstractanimation.cpp] Error 1
>
>...I examined the moc command lines in detail and the difference is
>that we explicitly add the gnulibstdc++ includes path(s):
>"-I/usr/nec/android-ndk-r6b/sources/cxx-stl-4.6.2/gnu-libstdc++/include
>-I/usr/nec/android-ndk-r6b/sources/cxx-stl-4.6.2/gnu-libstdc++/libs/armeabi/include"
>
>So I tested adding the equivalent (-I/usr/include/c++/4.6.1) to Ubuntu:
>/usr/nec/shared-build/bin/moc -I/usr/include/c++/4.6.1 ...etc...
>etc... /usr/nec/qt-src/src/corelib/animation/qabstractanimation.h -o
>.moc/release-shared/moc_qabstractanimation.cpp
>and it fails in much the same way:
>usr/include/c++/4.6/bits/stringfwd.:43: Parse error at "std"
>
>Which is good as it identifies that this is the problem. Moc can't
>handle very recent libstdc++ headers (because it doesn't do macro
>expansion).
>
>For us, the problem obviously because in qmake.conf we've got:
>ANDROID_SOURCES_CXX_STL_INCDIR =
>$$NDK_ROOT/sources/cxx-stl-$$ANDROID_CXXSTL_SUFFIX/gnu-libstdc++/include
>$$ANDROID_SOURCES_CXX_STL_LIBDIR/include
>QMAKE_INCDIR            = $$ANDROID_PLATFORM_PATH/include
>$$ANDROID_SOURCES_CXX_STL_INCDIR
>
>So I guess we need to not add this when mocc'ing, but I'm not sure how
>best to achieve this.
>
>I guess we could have QMAKE_INCDIR_MOC which doesn't get these things
>added or something like that? If anyone's got any thoughts then please
>shout.
>
>Cheers,
>
>Ray.
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>
>
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