With iOS 6.0 and above the LC_MAIN load command is available, which allows
dyld to call the application entrypoint directly instead of going through
_start in crt.o. By passing -e to the linker we can change this entrypoint
to our wrapper that sets up the separate stack before entering the native
iOS runloop through UIApplicationMain. As before, we call the user's main()
from applicationDidFinishLaunching.
By using LC_MAIN instead of messing with the object files we open up the
possibility of generating Bitcode instead of object code, which can be
useful for link-time optimizations, either locally or by Apple.
Change-Id: If2153bc919581cd93dfa10fb6ff1c305b3e39a52
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@theqtcompany.com>
The logic failed for cases like QT += core widgets.
Change-Id: Ic49c1a2314a4698b03956acbd6778b658326f3e2
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@theqtcompany.com>
We need to tell Xcode which architectures it should set up pre-link
dependencies for, as well as run the rename script in the root object
file directory. We pass it the current architectures so that we only
rename main() for simulator or device, not both.
Change-Id: I095d7c8a22ff0cb2ce872c9a86c93a070c1fcc65
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@digia.com>
After bbcdccd, a deprecation warning is written to
the console every time you run qmake on iOS.
This change will make use of the new QTPLUGIN.platforms=-
instead if the deprecated CONFIG -= import_qpa_plugin
Change-Id: I51e4f9d18f6abd87512a39b3236b89d5444fd6c1
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Processing the object file with ld strips away debug information for
the main() function, resulting in the debugger not being able to
break on specific lines of the function.
It also causes issues when externing sybols in main's object file.
We revert back to the approach of using the strings in-line in the
object file (which is why we keep the name the same length, 'qtmn').
Task-number: QTBUG-35553
Change-Id: I8b0acee36f48ecfefa2e4fd008a842365713d985
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
When building under Xcode we can limit the object files search to the
current SDK and debug/release configuration.
Change-Id: Ic405f13f46a594e3ed20d82ca6b84e7e67edebfc
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@digia.com>
This approach is similar to the earlier apprach of defining main=qt_main
when building the user's sources, but uses the linker to rename the
symbol instead, which is less fragile than using the preprocessor.
To keep the hybrid usecase unaffected by our wrapper logic we declare
both our main wrapper and a fallback qt_main as weak symbols, which
ensures that when the user's application links in our plugin the
real main/qt_main provided by the user is preferred over our weak
symbols.
Change-Id: Ic76f3ba8932430c4b13a1d3a40b8ed2322fe5eea
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
As they are closely tied to the macx-ios-clang mkspec and can't be shared.
Change-Id: Icb59304cc1e4be12732f50175f3f84be289300c2
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>
