On 23/6/23 22:16, Henry Skoglund wrote:
On 2023-06-23 07:15, Hamish Moffatt via Interest wrote:
If I add the linker flag /ENTRY:mainCRTStartup then it builds. What's
the correct Qt solution for this though?
The fact that adding /ENTRY:mainCRTStartup helped implies that you're
linking with /SUBSYSTEM:CONSOLE and not /SUBSYSTEM:WINDOWS, i.e.
defaulting to console flavor.
Maybe you forgot "QT += widgets" in the .pro file (just guessing :-)
That wasn't it (widgets were including and linking fine), but what I
figured out is that the magic helper in Qt5 qtmain is now the library
Qt6EntryPoint, and for some reason that wasn't being linked. Reading the
qmake debug logs, the entrypoint-private module gets added to QT_PRIVATE
during processing but then vanishes before it's used. In a test
application, the entrypoint-private module then adds
entrypoint-implementation which links the library and all is good.
I have no idea why entrypoint-private is disappearing from QT_PRIVATE,
but I just added entrypoint-implementation to QT directly and I'll live
with that for now.
Hamish
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