<![CDATA[template parameter is an integral of a size not supported on this platform | Q_STATIC_ASSERT_X | aarch64]]>I'm cross compiling Qt for Debian aarch64.

I installed the compilers using sudo apt install gcc-aarch64-linux-gnu g++-aarch64-linux-gnu

aarch64-linux-gnu-g++ version is 9.3.0

when I run make I encounter this error:

/home/ali/Qt/5.15.2/Src/qtbase/include/QtCore/../../src/corelib/global/qglobal.h:121:63: error: static assertion failed: template parameter is an integral of a size not supported on this platform
  121 | #  define Q_STATIC_ASSERT_X(Condition, Message) static_assert(bool(Condition), Message)
      |                                                               ^~~~~~~~~~~~~~~
/home/ali/Qt/5.15.2/Src/qtbase/include/QtCore/../../src/corelib/thread/qbasicatomic.h:97:5: note: in expansion of macro ‘Q_STATIC_ASSERT_X’
   97 |     Q_STATIC_ASSERT_X(QAtomicOpsSupport<sizeof(T)>::IsSupported, "template parameter is an integral of a size not supported on this platform");
      |     ^~~~~~~~~~~~~~~~~
make[3]: *** [Makefile:23936: .obj/qatomic.o] Error 1

I've tried -std=c++2a but the error persists.

this is my qmake.conf file:

include(../common/linux_device_pre.conf)

QMAKE_LIBS_EGL         += -lEGL
QMAKE_LIBS_OPENGL_ES2  += -lGLESv2 -lEGL

QMAKE_CFLAGS            = -march=armv8-a -mtune=cortex-a72
QMAKE_CXXFLAGS          = $$QMAKE_CFLAGS

DISTRO_OPTS            += aarch64 deb-aarch64

EGLFS_DEVICE_INTEGRATION = eglfs_kms

include(../common/linux_device_post.conf)

load(qt_config)

complete error log:

/home/ali/Qt/5.15.2/Src/qtbase/src/corelib/thread/qatomic.cpp:1747:4: error: #error "Q_ATOMIC_INT64_IS_SUPPORTED must be defined on a 64-bit platform"
 1747 | #  error "Q_ATOMIC_INT64_IS_SUPPORTED must be defined on a 64-bit platform"
      |    ^~~~~
In file included from /home/ali/Qt/5.15.2/Src/qtbase/include/QtCore/qglobal.h:1,
                 from /home/ali/Qt/5.15.2/Src/qtbase/src/corelib/global/qt_pch.h:56:
/home/ali/Qt/5.15.2/Src/qtbase/include/QtCore/../../src/corelib/thread/qbasicatomic.h: In instantiation of ‘class QBasicAtomicInteger<long int>’:
/home/ali/Qt/5.15.2/Src/qtbase/include/QtCore/../../src/corelib/thread/qatomic.h:59:7:   required from ‘class QAtomicInteger<long int>’
/home/ali/Qt/5.15.2/Src/qtbase/src/corelib/thread/qatomic.cpp:1754:1:   required from here
/home/ali/Qt/5.15.2/Src/qtbase/include/QtCore/../../src/corelib/global/qglobal.h:121:63: error: static assertion failed: template parameter is an integral of a size not supported on this platform
  121 |   define Q_STATIC_ASSERT_X(Condition, Message) static_assert(bool(Condition), Message)
      |                                                              ^~~~~~~~~~~~~~~

/home/ali/Qt/5.15.2/Src/qtbase/include/QtCore/../../src/corelib/thread/qbasicatomic.h:97:5: note: in expansion of macro ‘Q_STATIC_ASSERT_X’
   97 |     Q_STATIC_ASSERT_X(QAtomicOpsSupport<sizeof(T)>::IsSupported, "template parameter is an integral of a size not supported on this platform");
      |     ^~~~~~~~~~~~~~~~~
/home/ali/Qt/5.15.2/Src/qtbase/include/QtCore/../../src/corelib/thread/qbasicatomic.h: In instantiation of ‘class QBasicAtomicInteger<long unsigned int>’:
/home/ali/Qt/5.15.2/Src/qtbase/include/QtCore/../../src/corelib/thread/qatomic.h:59:7:   required from ‘class QAtomicInteger<long unsigned int>’
/home/ali/Qt/5.15.2/Src/qtbase/src/corelib/thread/qatomic.cpp:1755:1:   required from here
/home/ali/Qt/5.15.2/Src/qtbase/include/QtCore/../../src/corelib/global/qglobal.h:121:63: error: static assertion failed: template parameter is an integral of a size not supported on this platform
  121 |   define Q_STATIC_ASSERT_X(Condition, Message) static_assert(bool(Condition), Message)
      |                                                              ^~~~~~~~~~~~~~~

/home/ali/Qt/5.15.2/Src/qtbase/include/QtCore/../../src/corelib/thread/qbasicatomic.h:97:5: note: in expansion of macro ‘Q_STATIC_ASSERT_X’
   97 |     Q_STATIC_ASSERT_X(QAtomicOpsSupport<sizeof(T)>::IsSupported, "template parameter is an integral of a size not supported on this platform");
      |     ^~~~~~~~~~~~~~~~~
/home/ali/Qt/5.15.2/Src/qtbase/include/QtCore/../../src/corelib/thread/qbasicatomic.h: In instantiation of ‘class QBasicAtomicInteger<long long unsigned int>’:
/home/ali/Qt/5.15.2/Src/qtbase/include/QtCore/../../src/corelib/thread/qatomic.h:59:7:   required from ‘class QAtomicInteger<long long unsigned int>’
/home/ali/Qt/5.15.2/Src/qtbase/src/corelib/thread/qatomic.cpp:1756:1:   required from here
/home/ali/Qt/5.15.2/Src/qtbase/include/QtCore/../../src/corelib/global/qglobal.h:121:63: error: static assertion failed: template parameter is an integral of a size not supported on this platform
  121 |   define Q_STATIC_ASSERT_X(Condition, Message) static_assert(bool(Condition), Message)
      |                                                              ^~~~~~~~~~~~~~~

/home/ali/Qt/5.15.2/Src/qtbase/include/QtCore/../../src/corelib/thread/qbasicatomic.h:97:5: note: in expansion of macro ‘Q_STATIC_ASSERT_X’
   97 |     Q_STATIC_ASSERT_X(QAtomicOpsSupport<sizeof(T)>::IsSupported, "template parameter is an integral of a size not supported on this platform");
      |     ^~~~~~~~~~~~~~~~~
/home/ali/Qt/5.15.2/Src/qtbase/include/QtCore/../../src/corelib/thread/qbasicatomic.h: In instantiation of ‘class QBasicAtomicInteger<long long int>’:
/home/ali/Qt/5.15.2/Src/qtbase/include/QtCore/../../src/corelib/thread/qatomic.h:59:7:   required from ‘class QAtomicInteger<long long int>’
/home/ali/Qt/5.15.2/Src/qtbase/src/corelib/thread/qatomic.cpp:1757:1:   required from here
/home/ali/Qt/5.15.2/Src/qtbase/include/QtCore/../../src/corelib/global/qglobal.h:121:63: error: static assertion failed: template parameter is an integral of a size not supported on this platform
  121 |   define Q_STATIC_ASSERT_X(Condition, Message) static_assert(bool(Condition), Message)
      |                                                              ^~~~~~~~~~~~~~~

/home/ali/Qt/5.15.2/Src/qtbase/include/QtCore/../../src/corelib/thread/qbasicatomic.h:97:5: note: in expansion of macro ‘Q_STATIC_ASSERT_X’
   97 |     Q_STATIC_ASSERT_X(QAtomicOpsSupport<sizeof(T)>::IsSupported, "template parameter is an integral of a size not supported on this platform");
      |     ^~~~~~~~~~~~~~~~~
make[3]: *** [Makefile:23936: .obj/qatomic.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[3]: Leaving directory '/home/ali/Documents/Qt-CrossCompile-RaspberryPi/raspberrypi4/build/qtbase/src/corelib'
make[2]: *** [Makefile:198: sub-corelib-make_first] Error 2
make[2]: *** Waiting for unfinished jobs....
g++ -Wl,-O1 -Wl,--gc-sections -o ../../../bin/qdbuscpp2xml .obj/moc.o .obj/preprocessor.o .obj/generator.o .obj/parser.o .obj/token.o .obj/collectjson.o .obj/qdbuscpp2xml.o   /home/ali/Documents/Qt-CrossCompile-RaspberryPi/raspberrypi4/build/qtbase/lib/libQt5BootstrapDBus.a /home/ali/Documents/Qt-CrossCompile-RaspberryPi/raspberrypi4/build/qtbase/lib/libQt5Bootstrap.a -lpthread   
make[3]: Leaving directory '/home/ali/Documents/Qt-CrossCompile-RaspberryPi/raspberrypi4/build/qtbase/src/tools/qdbuscpp2xml'
make[2]: Leaving directory '/home/ali/Documents/Qt-CrossCompile-RaspberryPi/raspberrypi4/build/qtbase/src'
make[1]: *** [Makefile:51: sub-src-make_first] Error 2
make[1]: Leaving directory '/home/ali/Documents/Qt-CrossCompile-RaspberryPi/raspberrypi4/build/qtbase'
make: *** [Makefile:86: module-qtbase-make_first] Error 2
]]>https://forum.qt.io/topic/131007/template-parameter-is-an-integral-of-a-size-not-supported-on-this-platform-q_static_assert_x-aarch64RSS for NodeMon, 06 Apr 2026 01:39:01 GMTMon, 11 Oct 2021 06:00:46 GMT60<![CDATA[Reply to template parameter is an integral of a size not supported on this platform | Q_STATIC_ASSERT_X | aarch64 on Wed, 13 Oct 2021 05:53:45 GMT]]>because that's not for aarch64 target

]]>https://forum.qt.io/post/684803https://forum.qt.io/post/684803Wed, 13 Oct 2021 05:53:45 GMT<![CDATA[Reply to template parameter is an integral of a size not supported on this platform | Q_STATIC_ASSERT_X | aarch64 on Tue, 12 Oct 2021 20:40:24 GMT]]>Why not use the linux-rasp-pi4-v3d mkspec ?

]]>https://forum.qt.io/post/684756https://forum.qt.io/post/684756Tue, 12 Oct 2021 20:40:24 GMT<![CDATA[Reply to template parameter is an integral of a size not supported on this platform | Q_STATIC_ASSERT_X | aarch64 on Tue, 12 Oct 2021 08:04:42 GMT]]>@SGaist
Hi Thank you!

~/Qt/5.15.2/Src/configure -release -opengl es2 -eglfs \
-device rpi4-64 -device-option CROSS_COMPILE=/usr/bin/aarch64-linux-gnu- \
-sysroot ~/Documents/Qt-CrossCompile-RaspberryPi/raspberrypi4/sysroot \
-prefix /usr/local/qt5.15.2 -extprefix ~/Documents/Qt-CrossCompile-RaspberryPi/raspberrypi4/qt5.15.2 \
-opensource -confirm-license -skip qtscript -skip qtwayland -skip qtwebengine -nomake tests -make libs -pkg-config -no-use-gold-linker -v -recheck \
-L~/Documents/Qt-CrossCompile-RaspberryPi/raspberrypi4/sysroot/usr/lib/aarch64-linux-gnu \
-I~/Documents/Qt-CrossCompile-RaspberryPi/raspberrypi4/sysroot/usr/include/aarch64-linux-gnu
]]>https://forum.qt.io/post/684623https://forum.qt.io/post/684623Tue, 12 Oct 2021 08:04:42 GMT<![CDATA[Reply to template parameter is an integral of a size not supported on this platform | Q_STATIC_ASSERT_X | aarch64 on Mon, 11 Oct 2021 19:44:12 GMT]]>Hi and welcome to devnet,

Can you share the configure command you use ?

]]>https://forum.qt.io/post/684542https://forum.qt.io/post/684542Mon, 11 Oct 2021 19:44:12 GMT<![CDATA[Reply to template parameter is an integral of a size not supported on this platform | Q_STATIC_ASSERT_X | aarch64 on Mon, 11 Oct 2021 06:48:00 GMT]]>this is the first line of the error log:

#error "Q_ATOMIC_INT64_IS_SUPPORTED must be defined on a 64-bit platform"

there must be a config to tell the Qt that its aarch64, right?

]]>https://forum.qt.io/post/684425https://forum.qt.io/post/684425Mon, 11 Oct 2021 06:48:00 GMT