Q_ATOMIC_INT64_IS_SUPPORTED: Qt Compile errors on macOS

patrickkidd · wrote on 22 Jun 2019, 18:21

I and one other from the qt-interest email list have seen the following compile errors when building a fresh qt source tarball on the latest macOS. Qt-version doesn't seem to matter.

What is strange is that clearing config.cache and then reconfiguring (using ./config.status) and building seems to succeed reliably. Does anyone have any idea what could be causing this? I am using a couple of build scripts to build qt and it would be nice if it didn't fail.

The only thing I noticed in my config.log is that it reported that it could not find libatomic the first time around and that it could find lib atomic the second time around. This is very strange. Seems like a bug in the qt build system since nothing changed on my system between configure runs.

/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -c -include.pch/Qt5Core/c++_x86_64 -pipe -stdlib=libc++ -O3 -fPIC -std=c++1y -fapplication-extension  -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk -mmacosx-version-min=10.12 -fvisibility=hidden -fvisibility-inlines-hidden -ffunction-sections -fdata-sections -Wall -W -Wobjc-interface-ivars -Wobjc-method-access -Wobjc-multiple-method-names -DQT_NO_USING_NAMESPACE -DQT_NO_FOREACH -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_BUILD_CORE_LIB -DQT_BUILDING_QT -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT_MOC_COMPAT -DQT_USE_QSTRINGBUILDER -DQT_DEPRECATED_WARNINGS -DQT_DISABLE_DEPRECATED_BEFORE=0x050000 -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_NO_DEBUG -DPCRE2_CODE_UNIT_WIDTH=16 -I. -I../3rdparty/zlib/src -Iglobal -I../3rdparty/harfbuzz/src -I../3rdparty/md5 -I../3rdparty/md4 -I../3rdparty/sha3 -I../3rdparty -I../3rdparty/double-conversion/include -I../3rdparty/double-conversion/include/double-conversion -I../3rdparty/forkfd -I../3rdparty/tinycbor/src -I../../include -I../../include/QtCore -I../../include/QtCore/5.13.0 -I../../include/QtCore/5.13.0/QtCore -I.moc -I.tracegen -I../3rdparty/pcre2/src -I/Users/patrick/dev/vendor/sysroot-masos-64/include -I../../mkspecs/macx-clang -o .obj/qatomic.o thread/qatomic.cpp
thread/qatomic.cpp:1624:4: error: "Q_ATOMIC_INT64_IS_SUPPORTED must be defined on a 64-bit platform"
#  error "Q_ATOMIC_INT64_IS_SUPPORTED must be defined on a 64-bit platform"
  ^
In file included from thread/qatomic.cpp:1:
In file included from /Users/patrick/dev/vendor/sysroot-masos-64/build/qt-everywhere-src-5.13.0/qtbase/src/corelib/global/qt_pch.h:56:
In file included from ../../include/QtCore/../../src/corelib/global/qglobal.h:1224:
In file included from /Users/patrick/dev/vendor/sysroot-masos-64/build/qt-everywhere-src-5.13.0/qtbase/src/corelib/../../include/QtCore/qatomic.h:1:
In file included from thread/qatomic.h:46:
In file included from /Users/patrick/dev/vendor/sysroot-masos-64/build/qt-everywhere-src-5.13.0/qtbase/src/corelib/../../include/QtCore/qbasicatomic.h:1:
/Users/patrick/dev/vendor/sysroot-masos-64/build/qt-everywhere-src-5.13.0/qtbase/src/corelib/../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:97:5: error: static_assert failed due to requirement 'bool(QAtomicOpsSupport<sizeof(long)>::IsSupported)' "template parameter is an integral of a size not supported on this platform"
   Q_STATIC_ASSERT_X(QAtomicOpsSupport<sizeof(T)>::IsSupported, "template parameter is an integral of a size not supported on this platform");
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../include/QtCore/../../src/corelib/global/qglobal.h:121:49: note: expanded from macro 'Q_STATIC_ASSERT_X'
#  define Q_STATIC_ASSERT_X(Condition, Message) static_assert(bool(Condition), Message)
                                               ^             ~~~~~~~~~~~~~~~
thread/qatomic.h:55:31: note: in instantiation of template class 'QBasicAtomicInteger<long>' requested here
class QAtomicInteger : public QBasicAtomicInteger<T>
                             ^
thread/qatomic.cpp:1631:17: note: in instantiation of template class 'QAtomicInteger<long>' requested here
Q_STATIC_ASSERT(sizeof(QAtomicInteger<long>));
               ^
In file included from thread/qatomic.cpp:1:
In file included from /Users/patrick/dev/vendor/sysroot-masos-64/build/qt-everywhere-src-5.13.0/qtbase/src/corelib/global/qt_pch.h:56:
In file included from ../../include/QtCore/../../src/corelib/global/qglobal.h:1224:
In file included from /Users/patrick/dev/vendor/sysroot-masos-64/build/qt-everywhere-src-5.13.0/qtbase/src/corelib/../../include/QtCore/qatomic.h:1:
In file included from thread/qatomic.h:46:
In file included from /Users/patrick/dev/vendor/sysroot-masos-64/build/qt-everywhere-src-5.13.0/qtbase/src/corelib/../../include/QtCore/qbasicatomic.h:1:
/Users/patrick/dev/vendor/sysroot-masos-64/build/qt-everywhere-src-5.13.0/qtbase/src/corelib/../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:97:5: error: static_assert failed due to requirement 'bool(QAtomicOpsSupport<sizeof(unsigned long)>::IsSupported)' "template parameter is an integral of a size not supported on this platform"
   Q_STATIC_ASSERT_X(QAtomicOpsSupport<sizeof(T)>::IsSupported, "template parameter is an integral of a size not supported on this platform");
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../include/QtCore/../../src/corelib/global/qglobal.h:121:49: note: expanded from macro 'Q_STATIC_ASSERT_X'
#  define Q_STATIC_ASSERT_X(Condition, Message) static_assert(bool(Condition), Message)
                                               ^             ~~~~~~~~~~~~~~~
thread/qatomic.h:55:31: note: in instantiation of template class 'QBasicAtomicInteger<unsigned long>' requested here
class QAtomicInteger : public QBasicAtomicInteger<T>
                             ^
thread/qatomic.cpp:1632:17: note: in instantiation of template class 'QAtomicInteger<unsigned long>' requested here
Q_STATIC_ASSERT(sizeof(QAtomicInteger<unsigned long>));
               ^

SGaist · 22 Jun 2019, 18:48

Hi,

What do you mean by latest macOS ?
What version of Xcode are you using ?

patrickkidd · S SGaist 22 Jun 2019, 18:38

@SGaist Latest stable macOS (10.14.5) and Xcode (10.2.1).

SGaist · 25 Jun 2019, 21:13

Do you have any rogue .qmake.conf file lying in or around your build folder ?

patrickkidd · S SGaist 25 Jun 2019, 18:51

@SGaist said in Q_ATOMIC_INT64_IS_SUPPORTED: Qt Compile errors on macOS:

Do you have any rogue .qmake.conf file lying in or around your build folder ?

Shoot, you know I had a .qmake.stash file three folders up. I deleted that and now it totally works. I very vaguely remember something about this. Do you know how these files work???

SGaist · wrote on 26 Jun 2019, 18:57

And it was the .stash file that I was thinking about.

AFAIK, they keep track of some configuration like the macOS SDK configured for building Qt however I haven't search precisely how and when that file is generated.