iOS: Use in-place string renaming to rename main() instead of ld

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>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/plugins/platforms/ios/qioseventdispatcher.mm b/src/plugins/platforms/ios/qioseventdispatcher.mm
index f93c6cc3a7..821599d113 100644
--- a/src/plugins/platforms/ios/qioseventdispatcher.mm
+++ b/src/plugins/platforms/ios/qioseventdispatcher.mm
@@ -246,7 +246,7 @@ enum SetJumpResult
 // user our main wrapper. Since the symbol is weak, it will not
 // get used or cause a clash in the normal Qt application usecase,
 // where we rename main to qt_main.
-extern "C" int __attribute__((weak)) qt_main(int argc, char *argv[])
+extern "C" int __attribute__((weak)) qtmn(int argc, char *argv[])
 {
     Q_UNUSED(argc);
     Q_UNUSED(argv);
@@ -265,7 +265,7 @@ static void __attribute__((noinline, noreturn)) user_main_trampoline()
         strcpy(argv[i], [arg cStringUsingEncoding:[NSString defaultCStringEncoding]]);
     }
 
-    int exitCode = qt_main(argc, argv);
+    int exitCode = qtmn(argc, argv);
     delete[] argv;
 
     qEventDispatcherDebug() << "Returned from main with exit code " << exitCode;