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macOS
When building the 5.8 beta sources (and current 5.8 branch), the build fails because Q_OS_MAC isn't defined while moc parses source code. That is caused by moc not receiving all the paths it needs from qmake.
The error is:
Undefined symbols for architecture x86_64:
"QMacStyle::staticMetaObject", referenced from:
showToolTip(QHelpEvent*, QWidget*, QStyleOptionComplex const&, QStyle::ComplexControl, QStyle::SubControl) in qmdisubwindow.o
QMdiSubWindowPrivate::updateCursor() in qmdisubwindow.o
QMdiSubWindowPrivate::getRegion(QMdiSubWindowPrivate::Operation) const in qmdisubwindow.o
QMdiSubWindowPrivate::processClickedSubControl() in qmdisubwindow.o
QMdiSubWindowPrivate::setSizeGrip(QSizeGrip*) in qmdisubwindow.o
QMdiSubWindow::event(QEvent*) in qmdisubwindow.o
QMdiSubWindow::showEvent(QShowEvent*) in qmdisubwindow.o
...
"vtable for QMacStyle", referenced from:
QMacStyle::QMacStyle() in qmacstyle_mac.o
QMacStyle::~QMacStyle() in qmacstyle_mac.o
NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[3]: *** [../../lib/QtWidgets.framework/QtWidgets] Error 1
make[2]: *** [release-all] Error 2
make[1]: *** [sub-widgets-make_first] Error 2
make: *** [sub-src-make_first] Error 2
With an earlier warning from moc:
/private/tmp/qtbase-opensource-src-5.8.0-beta/bin/moc -DQT_NO_USING_NAMESPACE -DQT_NO_STYLE_WINDOWSVISTA -DQT_NO_STYLE_WINDOWSXP -DQT_NO_STYLE_ANDROID -DQT_BUILD_WIDGETS_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 -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_GUI_LIB -DQT_CORE_LIB --include .moc/debug/moc_predefs.h -I/private/tmp/qtbase-opensource-src-5.8.0-beta/mkspecs/macx-clang -I/private/tmp/qtbase-opensource-src-5.8.0-beta/src/widgets -I/private/tmp/qtbase-opensource-src-5.8.0-beta/src/widgets/dialogs -I/private/tmp/qtbase-opensource-src-5.8.0-beta/include -I/private/tmp/qtbase-opensource-src-5.8.0-beta/include/QtWidgets -I/private/tmp/qtbase-opensource-src-5.8.0-beta/include/QtWidgets/5.8.0 -I/private/tmp/qtbase-opensource-src-5.8.0-beta/include/QtWidgets/5.8.0/QtWidgets -I/private/tmp/qtbase-opensource-src-5.8.0-beta/src/widgets/.uic -I/private/tmp/qtbase-opensource-src-5.8.0-beta/include/QtGui/5.8.0 -I/private/tmp/qtbase-opensource-src-5.8.0-beta/include/QtGui/5.8.0/QtGui -I/private/tmp/qtbase-opensource-src-5.8.0-beta/include/QtCore/5.8.0 -I/private/tmp/qtbase-opensource-src-5.8.0-beta/include/QtCore/5.8.0/QtCore -I/private/tmp/qtbase-opensource-src-5.8.0-beta/include/QtGui -I/private/tmp/qtbase-opensource-src-5.8.0-beta/include/QtCore -I/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1 -I/usr/local/include -I/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/8.0.0/include -I/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include -F/private/tmp/qtbase-opensource-src-5.8.0-beta/lib styles/qmacstyle_mac_p.h -o .moc/debug/moc_qmacstyle_mac_p.cpp styles/qmacstyle_mac_p.h:0: Note: No relevant classes found. No output generated.
The class in question (QMacStyle) is defined as:
qmacstyle_p.h
#if defined(Q_OS_MAC) && !defined(QT_NO_STYLE_MAC) class QPalette; class QPushButton; class QStyleOptionButton; class QMacStylePrivate; class QMacStyle : public QCommonStyle { Q_OBJECT
In turn, Q_OS_MAC is defined as:
qsystemdetection.h
#if defined(__APPLE__) && (defined(__GNUC__) || defined(__xlC__) || defined(__xlc__)) # include <TargetConditionals.h> # if defined(TARGET_OS_MAC) && TARGET_OS_MAC # define Q_OS_DARWIN
And the file TargetConditionals.h is found at:
$ locate TargetConditionals.h /Applications/Xcode.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS.sdk/usr/include/TargetConditionals.h /Applications/Xcode.app/Contents/Developer/Platforms/AppleTVSimulator.platform/Developer/SDKs/AppleTVSimulator.sdk/usr/include/TargetConditionals.h /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/Kernel.framework/Versions/A/Headers/TargetConditionals.h /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/TargetConditionals.h /Applications/Xcode.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS.sdk/usr/include/TargetConditionals.h /Applications/Xcode.app/Contents/Developer/Platforms/WatchSimulator.platform/Developer/SDKs/WatchSimulator.sdk/usr/include/TargetConditionals.h /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include/TargetConditionals.h /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/include/TargetConditionals.h /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift-migrator/sdks/AppleTVOS.sdk/usr/include/TargetConditionals.h /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift-migrator/sdks/AppleTVSimulator.sdk/usr/include/TargetConditionals.h /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift-migrator/sdks/MacOSX.sdk/usr/include/TargetConditionals.h /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift-migrator/sdks/WatchOS.sdk/usr/include/TargetConditionals.h /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift-migrator/sdks/WatchSimulator.sdk/usr/include/TargetConditionals.h /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift-migrator/sdks/iPhoneOS.sdk/usr/include/TargetConditionals.h /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift-migrator/sdks/iPhoneSimulator.sdk/usr/include/TargetConditionals.h
As can be seen, none of the paths where this file can be found were passed to moc by qmake. That means moc could not find TargetConditionals.h, which means TARGET_OS_MAC was not defined, which means Q_OS_DARWIN was not defined, which means Q_OS_MAC was not defined, which means the class QMacStyle was #ifdef'ed out, which means the output file was blank and no meta object was generated.
$ cat .qmake.stash
QMAKE_DEFAULT_INCDIRS = \
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1 \
/usr/local/include \
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/8.0.0/include \
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include
QMAKE_DEFAULT_LIBDIRS = \
/lib \
/usr/lib
QMAKE_XCODE_DEVELOPER_PATH = /Applications/Xcode.app/Contents/Developer
QMAKE_XCODE_VERSION = 8.0
QMAKE_MAC_SDK.macosx.Path = /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk
QMAKE_MAC_SDK.macosx.PlatformPath = /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform
QMAKE_MAC_SDK.macosx.SDKVersion = 10.12
QMAKE_MAC_SDK.macx-clang.macosx.QMAKE_CC = /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
QMAKE_MAC_SDK.macx-clang.macosx.QMAKE_CXX = /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++
QMAKE_MAC_SDK.macx-clang.macosx.QMAKE_FIX_RPATH = \
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/install_name_tool \
-id
QMAKE_MAC_SDK.macx-clang.macosx.QMAKE_AR = \
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar \
cq
QMAKE_MAC_SDK.macx-clang.macosx.QMAKE_RANLIB = \
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib \
-s
QMAKE_MAC_SDK.macx-clang.macosx.QMAKE_LINK = /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++
QMAKE_MAC_SDK.macx-clang.macosx.QMAKE_LINK_SHLIB = /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++
The path wasn't found by qmake. That was found via:
mkspecs/features/default_post.prf
output = $$system("$$cmd_prefix $$QMAKE_CXX $$QMAKE_CXXFLAGS -xc++ -E -v - 2>&1 $$cmd_suffix", lines)
Which is incorrect, since that doesn't run the compiler that the build actually uses. It needs to run the correct compiler (which is found by sdk.prf).
- duplicates
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QTBUG-56144 Re-apply "fix QMAKE_DEFAULT_*DIRS resolution with apple SDK" in 5.8
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- Closed
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