Cross Compilation issue for qt

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.