- Qt 6.8
- Building Qt for Qualcomm Snapdragon 8155P Board on Ubuntu
- Qt 6.8.3 Reference Documentation

Build Qt with Ubuntu host ◦ Building a monolith project

# Building Qt for Qualcomm Snapdragon 8155P Board on Ubuntu

Having Green Hills INTEGRITY and Qualcomm development environments setup is a required before proceeding. See Installing Platform Dependencies.

## Creating a set environment shell script

To set up the development environment for Qt for INTEGRITY, build Qt from the sources for the Qualcomm Snapdragon 8155P board. Before building Qt for INTEGRITY, set up build environment. Here a batch script to automate that, as it needs to be done before each build.

Create a new shell script setEnvironment.sh, and save it under your home folder. Add the following export commands to the script:

     export PATH=$PATH:/work/ghs/sa8155/es7/es7_dev_env/hlos_dev_boot/apps/ghs_apps_proc/comp
     export INTEGRITY_DIR=/work/ghs/sa8155/es7/es7_dev_env/hlos_dev_boot/apps/ghs_apps_proc/integrity
     export INTEGRITY_BSP=platform-sa8155
     export INTEGRITY_BUILD_TARGET=chk
     export QC_MULTIMEDIA_INC_DIR=/work/ghs/sa8155/es7/es7_dev_env/hlos_dev_boot/apps/ghs_apps_proc/qc_bsp/include/amss/multimedia
     export GL_INC_DIR=/work/ghs/sa8155/es7/es7_dev_env/hlos_dev_boot/apps/ghs_apps_proc/qc_bsp/AMSS/multimedia/graphics/include/public
     export GL_LIB_DIR=/work/ghs/sa8155/es7/es7_dev_env/hlos_dev_boot/apps/ghs_apps_proc/qc_bsp/out/rel/libs/base:/work/ghs/sa8155/es7/es7_dev_env/hlos_dev_boot/apps/ghs_apps_proc/qc_bsp/out/rel/libs/multimedia/display:/work/ghs/sa8155/es7/es7_dev_env/hlos_dev_boot/apps/ghs_apps_proc/qc_bsp/out/rel/libs/multimedia/graphics:/work/ghs/sa8155/es7/es7_dev_env/hlos_dev_boot/apps/ghs_apps_proc/qc_bsp/out/rel/libs/platform/:/work/ghs/sa8155/es7/es7_dev_env/hlos_dev_boot/apps/ghs_apps_proc/qc_bsp/AMSS/multimedia/graphics/opengl/esx/build/integrity/prebuilt/

These export paths assume you have used the `/work/ghs/*` installation directories while installing the MULTI IDE and INTEGRITY (see Installing Platform Dependencies). If you have not used the default directories, adjust the export paths accordingly.

To initialize your build environment, run the following command in a terminal:

     source ~/setEnvironment.sh

Note: Run this command in your terminal every time you build Qt, or use the `qmake` or `CMake` build systems.

## Getting Qt sources

You can download the Qt source code from your Qt Account.

You can also get the Qt sources from the Git repo, see Getting source code.

Note: Qt sources version must be 6.2 or later.

Note: Qt modules supported by Qt for INTEGRITY are listed in Supported Qt Modules.

## Building Qt Desktop for cross-compiling tools usage

The cross-compiling Qt requires a host build of Qt being available. During the build, tools such as moc, rcc, qmlcachegen, qsb, and others, are invoked from there. For more detailed information please read Cross-compiling Qt.

Run the following commands:

     mkdir hostbuild
     cd hostbuild/
     ../qt5/configure -nomake tests -nomake examples -release -prefix /work/ghs/hostbuild
     cmake --build . --parallel 6
     cmake --install .

Note: configure always uses the Ninja generator and build tool if a `ninja` executable is available. Ninja is cross-platform, feature-rich, performant, and recommended on all platforms. The use of other generators might work but is not officially supported.

## Creating a toolchain file for INTEGRITY

To cross-compile a project with CMake, one must specify a toolchain file. This CMake-language file sets the right values for the platform name, the compiler/linker used, and a whole bunch of other toolchain-specific things. For Integrity build on Ubuntu create a toolchain.cmake file with content:

     # Copyright (C) 2022 The Qt Company Ltd.
     # SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause

     set(TARGET_ROOT_PATH "/work/ghs/sa8155/es7/es7_dev_env/hlos_dev_boot")
     set(CMAKE_BUILD_TYPE "Release")

     set(CMAKE_C_COMPILER cxintarm64)
     set(CMAKE_CXX_COMPILER cxintarm64)
     set(CMAKE_ASM_COMPILER cxintarm64)

     #generic
     set(CMAKE_SYSTEM_NAME Integrity)
     set(CMAKE_SYSTEM_PROCESSOR arm)
     set(CMAKE_CROSSCOMPILING True)

     set(EGL_FOUND True)
     set(UNIX True)

     set (CMAKE_C_COMPILE_FEATURES c_std_99)
     set (CMAKE_CXX_COMPILE_FEATURES
     cxx_alias_templates
     cxx_alignas
     cxx_alignof
     cxx_attributes
     cxx_auto_type
     cxx_constexp
     cxx_decltype
     cxx_delegating_constructors
     cxx_explicit_conversions
     cxx_extern_templates
     cxx_inheriting_constructors
     cxx_lambdas
     cxx_noexcept
     cxx_nonstatic_member_init
     cxx_nullptr
     cxx_override
     cxx_range_for
     cxx_raw_string_literals
     cxx_reference_qualified_functions
     cxx_rvalue_references
     cxx_static_assert
     cxx_std_17
     cxx_thread_local
     cxx_unicode_literals
     cxx_uniform_initialization
     cxx_unrestricted_unions
     cxx_variadic_macros
     cxx_variadic_templates)

     #graphical lib paths
     set(EGL_LIBRARY_GRAPHIC_PATH ${TARGET_ROOT_PATH}/apps/ghs_apps_proc/qc_bsp/out/chk/libs/multimedia/graphics)
     set(EGL_LIBRARY_PLATFORM_PATH ${TARGET_ROOT_PATH}/apps/ghs_apps_proc/qc_bsp/out/chk/libs/platform)
     set(EGL_LIBRARY_BASE_PATH ${TARGET_ROOT_PATH}/apps/ghs_apps_proc/qc_bsp/out/chk/libs/base)
     set(EGL_LIBRARY_CHK_PATH ${TARGET_ROOT_PATH}/apps/ghs_apps_proc/integrity/libs/arm64/chk)
     set(EGL_LIBRARY_PREBUILD_PATH ${TARGET_ROOT_PATH}/apps/ghs_apps_proc/qc_bsp/AMSS/multimedia/graphics/opengl/esx/build/integrity/prebuilt)
     set(EGL_LIBRARY_OPENWFD_PATH ${TARGET_ROOT_PATH}/apps/ghs_apps_proc/qc_bsp/out/chk/libs/multimedia/display)

     #base
     set(CMAKE_C_FLAGS  "-bsp $ENV{INTEGRITY_BSP} -os_dir $ENV{INTEGRITY_DIR} -non_shared -startfile_dir=$ENV{INTEGRITY_DIR}/libs/$ENV{INTEGRITY_BSP}/$ENV{INTEGRITY_BUILD_TARGET} --rtos_library_directory=libs/$ENV{INTEGRITY_BSP}/$ENV{INTEGRITY_BUILD_TARGET} --rtos_library_directory=libs/arm64/$ENV{INTEGRITY_BUILD_TARGET} -bigswitch -DINTEGRITY -llibposix.a")
     set(CMAKE_C_FLAGS_DEBUG "-g -Omaxdebug")
     set(CMAKE_C_FLAGS_RELEASE "-Ospeed -Olink -Omax -no_uvfd")
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} --signed_fields --diag_suppress=1,82,228,236,381,611,961,997,1795,1931,1974,3148 --c++17 --thread_local_storage --exceptions --defer_parse_function_templates")
     set(CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS} -frigor=accurate --signed_fields --no_implicit_include --link_once_templates -non_shared --new_outside_of_constructor --commons -I $ENV{QC_MULTIMEDIA_INC_DIR}")
     set(CMAKE_CXX_FLAGS_DEBUG ${CMAKE_C_FLAGS_DEBUG})
     set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE}")
     set(CMAKE_FIND_LIBRARY_PREFIXES "lib")
     set(CMAKE_FIND_LIBRARY_SUFFIXES ".a")
     set(BUILD_SHARED_LIBS OFF)
     set(QT_CFLAGS_OPTIMIZE_FULL "-Ospeed -Olink -Omax -no_uvfd")
     set(GLSLANG_OSDEP_PATH ../3rdparty/glslang/glslang/OSDependent/Unix)
     set(GL_INC_DIR ${TARGET_ROOT_PATH}/apps/ghs_apps_proc/qc_bsp/AMSS/multimedia/graphics/include/public)
     set(PKG_EGL_LIBRARY_DIRS ${TARGET_ROOT_PATH})

     set(EGL_INCLUDE_DIR ${GL_INC_DIR})
     set(EGL_LIBRARY "${EGL_LIBRARY_GRAPHIC_PATH}/libESXEGL_Adreno.a")

     set(GLESv2_INCLUDE_DIR ${GL_INC_DIR})
     set(GLESv2_LIBRARY "${EGL_LIBRARY_GRAPHIC_PATH}/libESXGLESv2_Adreno.a")

     set(IntegrityPlatformGraphics_INCLUDE_DIR ${GL_INC_DIR})
     set(IntegrityPlatformGraphics_LIBRARY "${EGL_LIBRARY_GRAPHIC_PATH}/libadreno_utils.a")
     set(IntegrityPlatformGraphics_LIBRARIES_PACK
         "${EGL_LIBRARY_BASE_PATH}/libplanedef.a"
         "${EGL_LIBRARY_BASE_PATH}/libmmosalfile.a"
         "${EGL_LIBRARY_BASE_PATH}/libOSAbstraction.a"
         "${EGL_LIBRARY_OPENWFD_PATH}/libopenwfd.a"
         "${EGL_LIBRARY_GRAPHIC_PATH}/libOSUser.a"
         "${EGL_LIBRARY_GRAPHIC_PATH}/libpanel.a"
         "${EGL_LIBRARY_GRAPHIC_PATH}/libGSLUser.a"
         "${EGL_LIBRARY_PREBUILD_PATH}/libglnext-llvm.a"
         "${EGL_LIBRARY_PLATFORM_PATH}/libpmem.a"
         "${EGL_LIBRARY_CHK_PATH}/libposix.a"
         "${EGL_LIBRARY_CHK_PATH}/libivfs.a"
     )

     list(APPEND _qt_igy_gui_libs
         "${GLESv2_LIBRARY}"
         "${IntegrityPlatformGraphics_LIBRARY}"
         "${IntegrityPlatformGraphics_LIBRARIES_PACK}")

     set(OPENGL_INCLUDE_DIR ${GL_INC_DIR})
     set(OPENGL_opengl_LIBRARY ${EGL_LIBRARY})

## Configuring Qt for INTEGRITY

Configure Qt for the Qualcomm Snapdragon 8155P board using these following commands:

     cd /work/ghs/targetbuild // Path to Qt installation directory
     cmake ../qt5/ -DQT_HOST_PATH=/work/ghs/hostbuild/qtbase
     -DCMAKE_TOOLCHAIN_FILE=/work/ghs/sa8155/es7/es7_dev_env/hlos_dev_boot/apps/ghs_apps_proc/toolchain_integrity.cmake
     -DQT_QMAKE_TARGET_MKSPEC=devices/integrity-armv8-SA8155P -DBUILD_qtdoc=OFF
     -DBUILD_qttranslations=OFF -DFEATURE_printdialog=OFF --debug-trycompile -DFEATURE_dbus=OFF
     -GNinja -DUNIX=ON
     -DEGL_LIBRARY=/work/ghs/sa8155/es7/es7_dev_env/hlos_dev_boot/libeglmegapack.a
     -DEGL_INCLUDE_DIR=/work/ghs/sa8155/es7/es7_dev_env/hlos_dev_boot/apps/ghs_apps_proc/qc_bsp/AMSS/multimedia/graphics/include/public
     -DFEATURE_dnslookup=OFF -DFEATURE_glib=OFF -DFEATURE_libudev=OFF -DFEATURE_system_pcre2=OFF -DFEATURE_sql_mysql=OFF
     -DCMAKE_INSTALL_PREFIX=/work/ghs/targetbuild

Note: INTEGRITY supports only static Qt builds.

Note: `QT_HOST_PATH` variable introduced in Qt 6. When cross-compiling, this must be set to the install location of Qt for the host platform. It is used to locate tools to be run on the host (moc, rcc, androiddeployqt, and so on).

## Building Qt for INTEGRITY

Build Qt by calling `cmake` in the terminal. You can run `cmake` with as many cores on your host machine as you desire. In our example we use six cores:

     cmake --build . --parallel 6

## Installing Qt

If you have not used the configure option `-prefix $PWD/qtbase` in Configuring Qt, run the following commands in a terminal:

     cd <Qt installation directory>
     cmake --install .

If you have used the configure option `-prefix $PWD/qtbase`, you can use Qt from the build directory, without running the `cmake install` command.

Qt is now configured and built for the sa8155 board.

Build Qt with Ubuntu host ◦ Building a monolith project