diff options
Diffstat (limited to 'mkspecs/macx-ios-clang/features/qt.prf')
-rw-r--r-- | mkspecs/macx-ios-clang/features/qt.prf | 34 |
1 files changed, 6 insertions, 28 deletions
diff --git a/mkspecs/macx-ios-clang/features/qt.prf b/mkspecs/macx-ios-clang/features/qt.prf index 9e6b486c6e..474a195e4b 100644 --- a/mkspecs/macx-ios-clang/features/qt.prf +++ b/mkspecs/macx-ios-clang/features/qt.prf @@ -19,34 +19,12 @@ equals(TEMPLATE, app):contains(qt_depends, gui(-private)?) { QTPLUGIN.platforms = - !no_main_wrapper { - # We use ld to rename the _main symbol to _qt_main, so that we don't get a symbol clash - # with the _main we provide that calls UIApplicationMain. We need to make a copy of the - # original object file, as ld will not copy over DWARF debug information to the output - # file. Instead, it will inject a reference back to the original object file, so when - # Xcode runs dsymutil to make the final dSYM file it will still find the debug info - # for the object file that provided the original _main. This back-reference has the - # interesting side-effect of the debug information still referring to the original - # symbol name, so stack-traces will show both our wrapper main and the original - # user main as 'main', and adding a symbolic breakpoint for 'main' will break on - # both functions. Although a bit weird, it's a good thing, as the user will still be - # able to add symbolic breakpoints for 'main', not caring that the symbol is actually - # called 'qt_main' now. - - macx-xcode { - objects_dir = "\"${OBJECT_FILE_DIR}-${CURRENT_VARIANT}\"" - archs = "\"${ARCHS}\"" - } else { - isEmpty(OBJECTS_DIR): \ - objects_dir = . - else: \ - objects_dir = $$shell_quote($$OBJECTS_DIR) - archs = $$shell_quote($$QMAKE_IOS_DEVICE_ARCHS $$QMAKE_IOS_SIMULATOR_ARCHS) - } - - !isEmpty(QMAKE_PRE_LINK): \ - QMAKE_PRE_LINK += ";" - - QMAKE_PRE_LINK += $$shell_quote($$QMAKESPEC/rename_main.sh) $$objects_dir $$archs + # The LC_MAIN load command available in iOS 6.0 and above allows dyld to + # directly call the entrypoint instead of going through _start in crt.o. + # Passing -e to the linker changes the entrypoint from _main to our custom + # wrapper that calls UIApplicationMain and dispatches back to main() once + # the application has started up and is ready to initialize QApplication. + QMAKE_LFLAGS += -Wl,-e,_qt_main_wrapper } } |