Qt5 for imx6

r3d9u11

Hi. I'm trying to cross-compile Qt 5.12.0, but compilation was excepted with message:

In file included from ../../../include/QtCore/qglobal.h:1:0,
                 from ../../../mkspecs/linux-g++/qplatformdefs.h:45,
                 from ../../corelib/io/qfsfileengine_p.h:54,
                 from ../../corelib/io/qfsfileengine.cpp:41:
../../../include/QtCore/../../src/corelib/global/qglobal.h:121:49: error: static assertion failed: Unsupported: read/write return a type with different size as the len parameter
 #  define Q_STATIC_ASSERT_X(Condition, Message) static_assert(bool(Condition), Message)
                                                 ^
../../corelib/io/qfsfileengine.cpp:88:1: note: in expansion of macro ‘Q_STATIC_ASSERT_X’
 Q_STATIC_ASSERT_X(sizeof(SignedIOType) == sizeof(UnsignedIOType),

here is my config parameters:

-opensource -confirm-license    \
    -device imx6                    \
    -device-option CROSS_COMPILE=arm-linux-gnueabihf- \
    -sysroot /home/eugene/qt5/sysroot \
    -prefix /                       \
    -release                        \
    -shared                         \
    -no-gcc-sysroot                 \
    -no-opengl                      \
    -no-xcb                         \
    -nomake tools                   \
    -nomake tests                   \
    -nomake examples                \
    -no-use-gold-linker             \
    -v

Any ideas?
Thanks!

SGaist

Hi,

What version of gcc are you using to build Qt ?

r3d9u11

@SGaist arm-linux-gnueabihf-g++ 5.4.0 20160609 (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.9)

r3d9u11

@SGaist I tried just now another toolchain: gcc-arm-none-eabi-7-2018-q2-update
But I had got excepted configuration process:

> /home/eugene/qt5/cache/gcc-arm-none-eabi-7-2018-q2-update/bin/../lib/gcc/arm-none-eabi/7.3.1/../../../../arm-none-eabi/lib/hard/libc.a(lib_a-exit.o): In function `exit':
> exit.c:(.text.exit+0x2c): undefined reference to `_exit'

I tried to do workaround:

export QMAKE_LFLAGS="--specs=nosys.specs"

but without success (nothing changes)

SGaist

At which point do you get that error ?

r3d9u11

This post is deleted!

r3d9u11

@SGaist Well, I removed and deleted all packages and arm-toolchains. Then I did install toolchain, again: sudo apt install g++-miltilib-arm-linux-gnueabi, and it solved configuration process.

But the topic (excepted compilation) is still yet:

=5 -DQT_VERSION_MINOR=12 -DQT_VERSION_PATCH=0 -DQT_BUILD_QMAKE -DQT_BOOTSTRAPPED -DPROEVALUATOR_FULL -DQT_NO_FOREACH /mnt/data/LinuxHome/Software/qt5/cache/qt-everywhere-src-5.12.0/qtbase/src/corelib/io/qfsfileengine.cpp
In file included from /mnt/data/LinuxHome/Software/qt5/cache/qt-everywhere-src-5.12.0/qtbase/include/QtCore/qglobal.h:1:0,
                 from /mnt/data/LinuxHome/Software/qt5/cache/qt-everywhere-src-5.12.0/qtbase/mkspecs/linux-g++/qplatformdefs.h:45,
                 from /mnt/data/LinuxHome/Software/qt5/cache/qt-everywhere-src-5.12.0/qtbase/src/corelib/io/qfsfileengine_p.h:54,
                 from /mnt/data/LinuxHome/Software/qt5/cache/qt-everywhere-src-5.12.0/qtbase/src/corelib/io/qfsfileengine.cpp:41:
/mnt/data/LinuxHome/Software/qt5/cache/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/global/qglobal.h:121:49: error: static assertion failed: Unsupported: read/write return a type with different size as the len parameter
 #  define Q_STATIC_ASSERT_X(Condition, Message) static_assert(bool(Condition), Message)
                                                 ^
/mnt/data/LinuxHome/Software/qt5/cache/qt-everywhere-src-5.12.0/qtbase/src/corelib/io/qfsfileengine.cpp:88:1: note: in expansion of macro ‘Q_STATIC_ASSERT_X’
 Q_STATIC_ASSERT_X(sizeof(SignedIOType) == sizeof(UnsignedIOType),
 ^
Makefile:439: recipe for target 'qfsfileengine.o' failed
make: *** [qfsfileengine.o] Error 1

compiler:

$ arm-linux-gnueabi-g++ -v
Using built-in specs.
COLLECT_GCC=arm-linux-gnueabi-g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc-cross/arm-linux-gnueabi/5/lto-wrapper
Target: arm-linux-gnueabi
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.9' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs --enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-5 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-libitm --disable-libquadmath --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-armel-cross/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-armel-cross --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-armel-cross --with-arch-directory=arm --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libgcj --enable-objc-gc --enable-multiarch --enable-multilib --disable-sjlj-exceptions --with-arch=armv5t --with-float=soft --disable-werror --enable-multilib --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=arm-linux-gnueabi --program-prefix=arm-linux-gnueabi- --includedir=/usr/arm-linux-gnueabi/include
Thread model: posix
gcc version 5.4.0 20160609 (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.9)

Qt configuration:

-opensource -confirm-license 
-device imx6 
-device-option CROSS_COMPILE=arm-linux-gnueabi- 
-sysroot /home/eugene/Desktop/Qt5-imx.6/sysroot 
-prefix / 
-release 
-shared
-no-opengl 
-no-cups 
-no-xcb 
-no-pch
 -skip qtactiveqt 
-skip qtconnectivity
 -skip qtgraphicaleffects 
-skip qtimageformats 
-skip qtlocation 
-skip qtsensors
 -skip qtsvg
 -skip qtdoc 
-nomake tools
 -nomake tests
 -nomake examples 
-v

I'm on Linux Mint 18.3 x64

SGaist

It seems you are back to an older version of gcc. Do I see correctly ?

r3d9u11

@SGaist No, from beginning I tried to use this version. I don't know, maybe it is older version, but this is the current version in Ubuntu 16.04 (or Mint 18.3) repos

r3d9u11

This post is deleted!

r3d9u11

@SGaist Finally I got latest compiler:

wget https://releases.linaro.org/components/toolchain/binaries/latest-7/arm-linux-gnueabi/gcc-linaro-7.3.1-2018.05-x86_64_arm-linux-gnueabi.tar.xz

and Qt config:

./configure            \
    -opensource        \
    -confirm-license   \
    -device imx6       \
    -device-option CROSS_COMPILE=/home/eugene/Desktop/QtBuilder/cache/gcc-linaro-7.3.1-2018.05-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi- \
    -sysroot /home/eugene/Desktop/QtBuilder/sysroot                \
    -prefix /                        \
    -no-gcc-sysroot                  \
    -no-use-gold-linker              \
    -no-opengl                       \
    -nomake tools                    \
    -nomake tests                    \
    -nomake examples                 \
    -v

and excepted configuration process:

...
Command line: -opensource -confirm-license -device imx6 -device-option CROSS_COMPILE=/home/eugene/Desktop/QtBuilder/cache/gcc-linaro-7.3.1-2018.05-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi- -sysroot /home/eugene/Desktop/QtBuilder/sysroot -prefix / -no-gcc-sysroot -no-use-gold-linker -no-opengl -nomake tools -nomake tests -nomake examples -v
Info: creating stash file /mnt/data/LinuxHome/Software/QtBuilder/cache/qt-everywhere-opensource-src-5.9.7/.qmake.stash

This is the Qt Open Source Edition.

You have already accepted the terms of the Open Source license.

Running configuration tests...
Checking for machine tuple... 
+ /home/eugene/Desktop/QtBuilder/cache/gcc-linaro-7.3.1-2018.05-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi-g++ -dumpmachine
> arm-linux-gnueabi
test config.qtbase.tests.machineTuple succeeded
Checking for valid makespec... 
+ cd /mnt/data/LinuxHome/Software/QtBuilder/cache/qt-everywhere-opensource-src-5.9.7/config.tests/verifyspec && /mnt/data/LinuxHome/Software/QtBuilder/cache/qt-everywhere-opensource-src-5.9.7/qtbase/bin/qmake "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += shared warn_off console single_arch" -early "CONFIG += cross_compile" /mnt/data/LinuxHome/Software/QtBuilder/cache/qt-everywhere-opensource-src-5.9.7/qtbase/config.tests/verifyspec
+ cd /mnt/data/LinuxHome/Software/QtBuilder/cache/qt-everywhere-opensource-src-5.9.7/config.tests/verifyspec && MAKEFLAGS= /usr/bin/make
> /home/eugene/Desktop/QtBuilder/cache/gcc-linaro-7.3.1-2018.05-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi-g++ -c -pipe -march=armv7-a -mfpu=neon -DLINUX=1 -DEGL_API_FB=1 -mfloat-abi=hard -O2 -w -fPIC  -I/mnt/data/LinuxHome/Software/QtBuilder/cache/qt-everywhere-opensource-src-5.9.7/qtbase/config.tests/verifyspec -I. -I/mnt/data/LinuxHome/Software/QtBuilder/cache/qt-everywhere-opensource-src-5.9.7/qtbase/mkspecs/devices/linux-imx6-g++ -o verifyspec.o /mnt/data/LinuxHome/Software/QtBuilder/cache/qt-everywhere-opensource-src-5.9.7/qtbase/config.tests/verifyspec/verifyspec.cpp
> /home/eugene/Desktop/QtBuilder/cache/gcc-linaro-7.3.1-2018.05-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi-g++ -mfloat-abi=hard -Wl,-O1 -o verifyspec verifyspec.o    
> /mnt/data/LinuxHome/Software/QtBuilder/cache/gcc-linaro-7.3.1-2018.05-x86_64_arm-linux-gnueabi/bin/../lib/gcc/arm-linux-gnueabi/7.3.1/../../../../arm-linux-gnueabi/bin/ld: error: verifyspec.o uses VFP register arguments, verifyspec does not
> /mnt/data/LinuxHome/Software/QtBuilder/cache/gcc-linaro-7.3.1-2018.05-x86_64_arm-linux-gnueabi/bin/../lib/gcc/arm-linux-gnueabi/7.3.1/../../../../arm-linux-gnueabi/bin/ld: failed to merge target specific data of file verifyspec.o
> collect2: error: ld returned 1 exit status
> Makefile:66: recipe for target 'verifyspec' failed
> make: *** [verifyspec] Error 1
Note: Also available for Linux: linux-clang linux-icc

ERROR: Cannot compile a minimal program. The toolchain or QMakeSpec is broken.

r3d9u11

@SGaist Seems that I have got a success with it. All manuals which I read (included nxp forum) told me about *-gnueabi compiler, but I tried to compile Qt for device imx6 with gcc-arm-8.2-2018.11-x86_64-arm-linux-gnueabihf (hard float). As result configuration and compilation was done without troubles.

SGaist

Glad you succeeded and thanks for sharing !

Any chances that you had a sysroot that was mismatching with your compiler ?

r3d9u11

@SGaist Well, I think no (if I understand your question right), because all paths to the compiler was setted right. Currently I'm trying to do a clean sysroot on my PC x86_64 (just a Qt+glib+gstreamer) with needed libraries (one question with pkg-config and Qt no resolved for me, yet) for the cross-compilation of target apps. As result I will produce a bash-script for a building an arm-sandbox to cross-compile from x86-64 machine to the ARM (specially imx6) and publish it here.

Also thank you for your leading questions (because really currently available in the Ubuntu repos version of compiler is deprecated, I think)!