Unknown type name 'uint8_t' after update Xcode

[BushyAxis793]

@jsulm I deleted my debug folder and try build again. I got the same error.

[BushyAxis793]

@hskoglund Yes I got the same problem after upgrade Xcode to 16.0.

[SGaist]

Do you have the same issue if you create a new project ?

[BushyAxis793]

@SGaist Yes, I have.

[hskoglund]

I just checked on my Mac running Xcode 16.0 (Sonoma 14.6.1) the definition for uint8_t comes from this file:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/_types/_uint8_t.h

The file contains a single typedef:
typedef unsigned char uint8_t;

[artwaw]

EDIT:
Errors are gone after two steps:

1. Added set(CMAKE_OSX_SYSROOT "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX15.sdk") to top-level CMakeLists.txt;
2. In build configuration (Project options) changed value of WrapOpenGL_AGL to point to the right SDK (15 instead of 14.5).

I presume those would not be necessary once the proper update to Qt comes in, with support for the new SDK?

EDIT ENDS.

Weird errors after the update:

/Qt/Tools/CMake/CMake.app/Contents/share/cmake-3.29/Modules/Platform/Darwin-Initialize.cmake:308 (message):
  Ignoring CMAKE_OSX_SYSROOT value:

   /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.5.sdk

  because the directory does not exist.

and

In file included from /Users/artwaw/Qt/6.7.2/macos/lib/QtSql.framework/Headers/QSqlRelationalTableModel:1:
In file included from /Users/artwaw/Qt/6.7.2/macos/lib/QtSql.framework/Headers/qsqlrelationaltablemodel.h:7:
In file included from /Users/artwaw/Qt/6.7.2/macos/lib/QtSql.framework/Headers/qtsqlglobal.h:11:
/Users/artwaw/Qt/6.7.2/macos/lib/QtCore.framework/Headers/qglobal.h:13:12: fatal error: 'type_traits' file not found
   13 | #  include <type_traits>```

[BushyAxis793]

@artwaw Thanks for reply! I followed your steps but still got an error.

[BushyAxis793]

@hskoglund I confirm.

[jsulm]

@BushyAxis793 said in Unknown type name 'uint8_t' after update Xcode:

but still got an error

Please post the error...

[BushyAxis793]

@jsulm Thanks for reply! Error below:

[BushyAxis793]

This post is deleted!

[BushyAxis793]

I got a few new errors

[SGaist]

At this point, you should try to build a dummy basic hello world using uint8_t without anything Qt in it to ensure that your setup is working.

[BushyAxis793]

@SGaist After created new project I got notification about new update available. I updated everything. I reopen my project and I have no more errors!

Thanks everyone for help!
Have a good day

[SGaist]

Great !

Then please mark the thread as solved so other forum users may know a solution has been found :-)