Cross Compilation issue for qt

[raven-worx]

@upendar25 said in Cross Compilation issue for qt:

Yes. I have installed the cross compiler for STM. I am able to cross compile helloworld program and run on Target.
I have one doubt. This method with configure, make, make install, do i have to move the built files to my Target? or it creates cross compiler with qt on host PC?

since you say you are able to run your cross compiled exectuable on the target i dont understand what your second question is about?

[upendar25]

@raven-worx This helloworld program uses GTK module and built by creating a makefile. It works fine. But i am unable to build the same with Qt5. Forthis i need Qt libraries and toolchain to compile qt applications.

@koahnig

I have downloaded the qt source and tried to configure for my device. But got the below error.

Creating qmake...
make: Nothing to be done for 'first'.
Command line: -release -release -opengl es2 -device stlinux-arm-gnueabi-g++ -device-option CROSS_COMPILE=/home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/Developer-Package/SDK/sysroots/x86_64-openstlinux_weston_sdk-linux/usr/bin/arm-openstlinux_weston-linux-gnueabi-gcc -sysroot usr/local -opensource -confirm-license -make libs -nomake tools -nomake examples -nomake tests -skip qt3d -skip qtandroidextras -skip qtcanvas3d -skip qtcharts -skip qtconnectivity -skip qtdatavis3d -skip qtdeclarative -skip qtdoc -skip qtgamepad -skip qtgraphicaleffects -skip qtimageformats -skip qtlocation -skip qtmacextras -skip qtmultimedia -skip qtnetworkauth -skip qtpurchasing -skip qtquickcontrols -skip qtquickcontrols2 -skip qtscript -skip qtscxml -skip qtsensors -skip qtserialbus -skip qtserialport -skip qtspeech -skip qtsvg -skip qttools -skip qttranslations -skip qtvirtualkeyboard -skip qtwayland -skip qtwebchannel -skip qtwebengine -skip qtwebsockets -skip qtwebview -skip qtwinextras -skip qtx11extras -skip qtxmlpatterns -no-feature-texthtmlparser -no-feature-textodfwriter -no-feature-concurrent -no-feature-effects -no-feature-sharedmemory -no-feature-systemsemaphore -no-feature-im -no-feature-process -no-feature-dom -no-feature-filesystemmodel -no-feature-filesystemwatcher -no-feature-graphicsview -no-feature-graphicseffect -no-feature-sizegrip -no-feature-calendarwidget -no-feature-printpreviewwidget -no-feature-keysequenceedit -no-feature-colordialog -no-feature-filedialog -no-feature-fontdialog -no-feature-printpreviewdialog -no-feature-progressdialog -no-feature-inputdialog -no-feature-errormessage -no-feature-wizard -no-feature-datawidgetmapper -no-feature-imageformat_bmp -no-feature-imageformat_ppm -no-feature-imageformat_xbm -no-feature-imageformat_png -no-feature-imageformat_jpeg -no-feature-image_heuristic_mask -no-feature-image_text -no-feature-colornames -no-feature-cups -no-feature-paint_debug -no-feature-freetype -no-feature-translation -no-feature-codecs -no-feature-big_codecs -no-feature-iconv -no-feature-ftp -no-feature-udpsocket -no-feature-networkproxy -no-feature-socks5 -no-feature-networkdiskcache -no-feature-bearermanagement -no-feature-completer -no-feature-fscompleter -no-feature-desktopservices -no-feature-mimetype -no-feature-systemtrayicon -no-feature-undocommand -no-feature-undostack -no-feature-undogroup -no-feature-undoview -no-feature-statemachine -no-feature-gestures -no-feature-dbus -v
Project ERROR: Cannot run target compiler 'arm-linux-gnueabi-g++'. Output:

===================
Maybe you forgot to setup the environment?

[0_1556909255290_qmake.conf](Uploading 100%)

[raven-worx]

@upendar25 said in Cross Compilation issue for qt:

-device stlinux-arm-gnueabi-g++

there is no such device available?
Did you add it a mkspec for it yourself? If so please show it.

CROSS_COMPILE=/home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/Developer-Package/SDK/sysroots/x86_64-openstlinux_weston_sdk-linux/usr/bin/arm-openstlinux_weston-linux-gnueabi-gcc

should actually look like
CROSS_COMPILE=/home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/Developer-Package/SDK/sysroots/x86_64-openstlinux_weston_sdk-linux/usr/bin/arm-openstlinux_weston-linux-gnueabi-

-sysroot usr/local

are you sure this is your sysroot? If so it shouldn't it be -sysroot /usr/local?

also you may want to specify something like -prefix /usr/lib/myqt -hostprefix /home/upendar/myqt. After make install copy everything from /home/upendar/myqt (local) to /usr/lib/myqt (on the target device)

[upendar25]

@raven-worx Thank you for the detailed reply.

I am not sure of sysroot. How to find it for a device?

and I ran the configure command with the changes you specified. I got the following error.

• arm-openstlinux_weston-linux-gnueabi-g++ -dumpmachine

arm-openstlinux_weston-linux-gnueabi
Checking for valid makespec...

• cd /home/upendar/Data/Qt5/qt-everywhere-src-5.12.3/config.tests/verifyspec && /home/upendar/Data/Qt5/qt-everywhere-src-5.12.3/qtbase/bin/qmake "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += shared warn_off console single_arch" "QMAKE_CFLAGS += --sysroot=/usr/local" "QMAKE_CXXFLAGS += --sysroot=/usr/local" "QMAKE_LFLAGS += --sysroot=/usr/local" -early "CONFIG += cross_compile" /home/upendar/Data/Qt5/qt-everywhere-src-5.12.3/qtbase/config.tests/verifyspec
• cd /home/upendar/Data/Qt5/qt-everywhere-src-5.12.3/config.tests/verifyspec && MAKEFLAGS= /usr/bin/make clean && MAKEFLAGS= /usr/bin/make

rm -f verifyspec.o
rm -f *~ core *.core
arm-openstlinux_weston-linux-gnueabi-g++ -c -pipe --sysroot=/usr/local -O2 -w -fPIC -I/home/upendar/Data/Qt5/qt-everywhere-src-5.12.3/qtbase/config.tests/verifyspec -I. -I/home/upendar/Data/Qt5/qt-everywhere-src-5.12.3/qtbase/mkspecs/devices/stlinux-arm-gnueabi-g++ -o verifyspec.o /home/upendar/Data/Qt5/qt-everywhere-src-5.12.3/qtbase/config.tests/verifyspec/verifyspec.cpp
arm-openstlinux_weston-linux-gnueabi-g++ --sysroot=/usr/local -Wl,-O1 -o verifyspec verifyspec.o
/home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/Developer-Package/SDK/sysroots/x86_64-openstlinux_weston_sdk-linux/usr/libexec/arm-openstlinux_weston-linux-gnueabi/gcc/arm-openstlinux_weston-linux-gnueabi/8.2.0/real-ld: warning: library search path "/usr/local/lib" is unsafe for cross-compilation
/home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/Developer-Package/SDK/sysroots/x86_64-openstlinux_weston_sdk-linux/usr/libexec/arm-openstlinux_weston-linux-gnueabi/gcc/arm-openstlinux_weston-linux-gnueabi/8.2.0/real-ld: cannot find crt1.o: No such file or directory
/home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/Developer-Package/SDK/sysroots/x86_64-openstlinux_weston_sdk-linux/usr/libexec/arm-openstlinux_weston-linux-gnueabi/gcc/arm-openstlinux_weston-linux-gnueabi/8.2.0/real-ld: cannot find crti.o: No such file or directory
/home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/Developer-Package/SDK/sysroots/x86_64-openstlinux_weston_sdk-linux/usr/libexec/arm-openstlinux_weston-linux-gnueabi/gcc/arm-openstlinux_weston-linux-gnueabi/8.2.0/real-ld: cannot find crtbegin.o: No such file or directory
/home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/Developer-Package/SDK/sysroots/x86_64-openstlinux_weston_sdk-linux/usr/libexec/arm-openstlinux_weston-linux-gnueabi/gcc/arm-openstlinux_weston-linux-gnueabi/8.2.0/real-ld: cannot find -lstdc++
/home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/Developer-Package/SDK/sysroots/x86_64-openstlinux_weston_sdk-linux/usr/libexec/arm-openstlinux_weston-linux-gnueabi/gcc/arm-openstlinux_weston-linux-gnueabi/8.2.0/real-ld: cannot find -lm
/home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/Developer-Package/SDK/sysroots/x86_64-openstlinux_weston_sdk-linux/usr/libexec/arm-openstlinux_weston-linux-gnueabi/gcc/arm-openstlinux_weston-linux-gnueabi/8.2.0/real-ld: cannot find -lgcc_s
/home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/Developer-Package/SDK/sysroots/x86_64-openstlinux_weston_sdk-linux/usr/libexec/arm-openstlinux_weston-linux-gnueabi/gcc/arm-openstlinux_weston-linux-gnueabi/8.2.0/real-ld: cannot find -lgcc
/home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/Developer-Package/SDK/sysroots/x86_64-openstlinux_weston_sdk-linux/usr/libexec/arm-openstlinux_weston-linux-gnueabi/gcc/arm-openstlinux_weston-linux-gnueabi/8.2.0/real-ld: cannot find -lc
/home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/Developer-Package/SDK/sysroots/x86_64-openstlinux_weston_sdk-linux/usr/libexec/arm-openstlinux_weston-linux-gnueabi/gcc/arm-openstlinux_weston-linux-gnueabi/8.2.0/real-ld: cannot find -lgcc_s
/home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/Developer-Package/SDK/sysroots/x86_64-openstlinux_weston_sdk-linux/usr/libexec/arm-openstlinux_weston-linux-gnueabi/gcc/arm-openstlinux_weston-linux-gnueabi/8.2.0/real-ld: cannot find -lgcc
/home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/Developer-Package/SDK/sysroots/x86_64-openstlinux_weston_sdk-linux/usr/libexec/arm-openstlinux_weston-linux-gnueabi/gcc/arm-openstlinux_weston-linux-gnueabi/8.2.0/real-ld: cannot find crtend.o: No such file or directory
/home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/Developer-Package/SDK/sysroots/x86_64-openstlinux_weston_sdk-linux/usr/libexec/arm-openstlinux_weston-linux-gnueabi/gcc/arm-openstlinux_weston-linux-gnueabi/8.2.0/real-ld: cannot find crtn.o: No such file or directory
collect2: error: ld returned 1 exit status
Makefile:68: 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.

My Mkspec file:

qmake configuration for building with arm-openstlinux_weston-linux-gnueabi-g++

MAKEFILE_GENERATOR = UNIX
CONFIG += incremental
QMAKE_INCREMENTAL_STYLE = sublib

include(../common/linux.conf)
include(../common/gcc-base-unix.conf)
include(../common/g++-unix.conf)

modifications to g++.conf

QMAKE_CC = arm-openstlinux_weston-linux-gnueabi-gcc
QMAKE_CXX = arm-openstlinux_weston-linux-gnueabi-g++
QMAKE_LINK = arm-openstlinux_weston-linux-gnueabi-g++
QMAKE_LINK_SHLIB = arm-openstlinux_weston-linux-gnueabi-g++

modifications to linux.conf

QMAKE_AR = arm-openstlinux_weston-linux-gnueabi-ar cqs
QMAKE_OBJCOPY = arm-openstlinux_weston-linux-gnueabi-objcopy
QMAKE_NM = arm-openstlinux_weston-linux-gnueabi-nm -P
QMAKE_STRIP = arm-openstlinux_weston-linux-gnueabi-strip
load(qt_config).

This i created using a generic file in qtbase/devices. I am not sure its correct but i am going with it.

[raven-worx]

@upendar25 said in Cross Compilation issue for qt:

I am not sure of sysroot. How to find it for a device?

a sysroot is a directory structure, similiar to a separate Linux root / structure. Normally this comes along with the cross compiler. It contains the libs for the traget platform the cross-compiler should link against.

modifications to g++.conf
modifications to g++.conf

you are overwriting the compilers. Are those really globally accessible?

linux_device_pre.conf already contains:

QMAKE_CC                = $${CROSS_COMPILE}gcc
QMAKE_CXX               = $${CROSS_COMPILE}g++
QMAKE_LINK              = $${QMAKE_CXX}
QMAKE_LINK_SHLIB        = $${QMAKE_CXX}

Which already produces the calls you need with the CROSS_COMPILE variable i suggested.

I dont know if the cross compiler needs any special parameters/flags? If so only define those within this minimal device:

include(../common/linux_device_pre.conf)

# QMAKE VARIABLE MODIFICATIONS HERE

include(../common/linux_arm_device_post.conf)

load(qt_config)

Make sure you set the CROSS_COMPILE variable (like you already do).

[upendar25]

@raven-worx Hi..

I did these changes. But still there seems to be a problem with configure options.

./configure -release -opengl es2 -opensource -confirm-license -device stlinux-arm-gnueabi-g++ -device-option CROSS_COMPILE=/home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/sysroots/x86_64-openstlinux_weston_sdk-linux/usr/bin/arm-openstlinux_weston-linux-gnueabi/arm-openstlinux_weston-linux-gnueabi- -sysroot /home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/Developer-Package/SDK/sysroots/cortexa7t2hf-neon-vfpv4-openstlinux_weston-linux-gnueabi -v

• cd qtbase
• /home/upendar/STM32MPU_workspace/qt-everywhere-src-5.12.3/qtbase/configure -top-level -release -opengl es2 -opensource -confirm-license -device stlinux-arm-gnueabi-g++ -device-option CROSS_COMPILE=/home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/sysroots/x86_64-openstlinux_weston_sdk-linux/usr/bin/arm-openstlinux_weston-linux-gnueabi/arm-openstlinux_weston-linux-gnueabi- -sysroot /home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/Developer-Package/SDK/sysroots/cortexa7t2hf-neon-vfpv4-openstlinux_weston-linux-gnueabi -v
  Creating qmake...
  make: Nothing to be done for 'first'.
  Command line: -release -opengl es2 -opensource -confirm-license -device stlinux-arm-gnueabi-g++ -device-option CROSS_COMPILE=/home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/sysroots/x86_64-openstlinux_weston_sdk-linux/usr/bin/arm-openstlinux_weston-linux-gnueabi/arm-openstlinux_weston-linux-gnueabi- -sysroot /home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/Developer-Package/SDK/sysroots/cortexa7t2hf-neon-vfpv4-openstlinux_weston-linux-gnueabi -v
  Project ERROR: Cannot run target compiler '/home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/sysroots/x86_64-openstlinux_weston_sdk-linux/usr/bin/arm-openstlinux_weston-linux-gnueabi/arm-openstlinux_weston-linux-gnueabi-g++'. Output:
  ===================
  ===================
  Maybe you forgot to setup the environment?
  .

---

echo $CROSS_COMPILE
arm-openstlinux_weston-linux-gnueabi-

CROSS_COMPILE is set. Still its not being recognized.

[raven-worx]

@upendar25 said in Cross Compilation issue for qt:

Project ERROR: Cannot run target compiler '/home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/sysroots/x86_64-openstlinux_weston_sdk-linux/usr/bin/arm-openstlinux_weston-linux-gnueabi/arm-openstlinux_weston-linux-gnueabi-g++'.

can you run it?

[upendar25]

@raven-worx Surprisingly no. It says no file or directory. But i have that file in that location. I have reinstalled the cross compiler SDK.

I am able to cross compile using a makefile running it in the SDK environment. But separately with this g++, i am unable to compile a cpp file.

[raven-worx]

@upendar25 said in Cross Compilation issue for qt:

Surprisingly no. It says no file or directory. But i have that file in that location.

for sure you are overseeing something here

[upendar25]

@raven-worx I think so. But i am unable to figure it out.

I have done the following steps.

Hardware: STM32MP157c-DK2 with Cortex A7 and M4

SDK is installed : https://wiki.st.com/stm32mpu/index.php/STM32MP1_Developer_Package#Installing_the_SDK

Qt12.3 : https://download.qt.io/archive/qt/5.12/5.12.3/single/qt-everywhere-src-5.12.3.tar.xz

Configure command: ./configure -release -opengl es2 -opensource -confirm-license -device stlinux-arm-gnueabi-g++ -device-option CROSS_COMPILE=/home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/sysroots/x86_64-openstlinux_weston_sdk-linux/usr/bin/arm-openstlinux_weston-linux-gnueabi/arm-openstlinux_weston-linux-gnueabi- -sysroot home/upendar/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/sysroots/x86_64-openstlinux_weston_sdk-linux -v
.

if someone can point my mistake, it would help me a lot.

Thank you!

[raven-worx]

@upendar25
i mean the path is obviously wrong when you can't execute it.
Check it directory by directory and you will find the mistake. Once you found it adapt the CROSS_COMPILE parameter accordingly.