No gn found for cross-compilation

[Wycer]

Hi, I am trying to compile "qt-everywhere-src-6.6.0" and it fails at QtWebEngine module with the error "No gn found for cross-compilation".
At first I had different errors which just were some missing packages. Now I try installing gn (generate-ninja) package but it didn't seem to solve it, also tried installing some packages I saw people on the internet telling it was required but still no luck.

Here is my cmake code in case it is related:

cmake -GNinja -DCMAKE_BUILD_TYPE=Release -DQT_FEATURE_eglfs_egldevice=ON -DQT_FEATURE_eglfs_gbm=ON -DQT_BUILD_TOOLS_WHEN_CROSSCOMPILING=ON  -DQT_BUILD_EXAMPLES=OFF -DQT_BUILD_TESTS=OFF -DQT_HOST_PATH=/home/speeder/qt6Host -DCMAKE_STAGING_PREFIX=/home/speeder/qt6rpi -DCMAKE_INSTALL_PREFIX=/home/speeder/qt6crosspi -DCMAKE_PREFIX_PATH=/home/speeder/rpi-sdk/sysroot/usr/lib/ -DCMAKE_TOOLCHAIN_FILE=/home/speeder/qt-cross/toolchain.cmake /home/speeder/qt-cross/qt-everywhere-src-6.6.0/

and here is my toolchain.cmake file code:

cmake_minimum_required(VERSION 3.16)
include_guard(GLOBAL)

set(CMAKE_SYSTEM_NAME Linux)

set(CMAKE_SYSTEM_PROCESSOR arm)

set(TARGET_SYSROOT /home/speeder/rpi-sdk/sysroot)

set(CROSS_COMPILER /opt/rpi/rpi-gcc-8.3.0/bin/arm-linux-gnueabihf)

set(CMAKE_SYSROOT ${TARGET_SYSROOT})

set(CMAKE_C_COMPILER ${CROSS_COMPILER}-gcc)
set(CMAKE_CXX_COMPILER ${CROSS_COMPILER}-g++)

set(CMAKE_LIBRARY_ARCHITECTURE arm-linux-gnueabihf)

set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fPIC -Wl,-rpath-link,${CMAKE_SYSROOT}/usr/lib/${CMAKE_LIBRARY_ARCHITECTURE} -L${CMAKE_SYSROOT}/usr/lib/${CMAKE_LIBRARY_ARCHITECTURE}")

set(CMAKE_C_FLAGS "${CMAKE_CXX_FLAGS} -fPIC -Wl,-rpath-link,${CMAKE_SYSROOT}/usr/lib/${CMAKE_LIBRARY_ARCHITECTURE} -L${CMAKE_SYSROOT}/usr/lib/${CMAKE_LIBRARY_ARCHITECTURE}")

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC -Wl,-rpath-link,${CMAKE_SYSROOT}/usr/lib/${CMAKE_LIBRARY_ARCHITECTURE} -L${CMAKE_SYSROOT}/usr/lib/${CMAKE_LIBRARY_ARCHITECTURE}")

set(QT_COMPILER_FLAGS "-march=armv8-a -mfpu=crypto-neon-fp-armv8 -mtune=cortex-a72 -mfloat-abi=hard")
set(QT_COMPILER_FLAGS_RELEASE "-O2 -pipe")
set(QT_LINKER_FLAGS "-Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed")

set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)

set(CMAKE_THREAD_LIBS_INIT "-lpthread")
set(CMAKE_HAVE_THREADS_LIBRARY 1)
set(CMAKE_USE_WIN32_THREADS_INIT 0)
set(CMAKE_USE_PTHREADS_INIT 1)
set(THREADS_PREFER_PTHREAD_FLAG ON)

I am clueless, forgive me if it's a dumb question as I am new to this all. Thank you for reading this far even if you didn't came up with a solution, appreciate the effort!

Edit: if that's relevant I am using a Raspberry Pi 3 Model B+ running Bullseye. Here is the tutorial I used as my main guideline for the whole process

[SamiV123]

gn is a Google build tool used to build the chromium/chrome project.

https://gn.googlesource.com/gn

If you don't need QtWebView it'll be 1000000x easier to just disable QtWebView in the build than start messing with gn and chromium build...

[Wycer]

@SamiV123 I do need, main module of my project.
I googled a lot and eventually found that link too, however I am not sure what to do next. I tried following their install process but still got the error, I tried installing using apt and also didn't work.
If you can guilde me a little more that would be great! And thanks a lot for your time and effort :)

[SamiV123]

@Wycer said in No gn found for cross-compilation:

@SamiV123 I do need, main module of my project.
I googled a lot and eventually found that link too, however I am not sure what to do next. I tried following their install process but still got the error, I tried installing using apt and also didn't work.
If you can guilde me a little more that would be great! And thanks a lot for your time and effort :)

Sorry, all I can offer is try following the chromium build instructions, if you can get your env to a point where you can build the chromium source then it should hopefully work for Qt as well.

https://www.chromium.org/developers/how-tos/get-the-code/