After pulling the current master branch, this error is occurring when compiling my projects.

[gamboajorge49]

Occurring in the unit: ..\JEDI_JCL_CLONE\jcl\source\common\JclSynch.pas

After pulling the current master branch, this error is occurring when compiling my projects.

[dcc32 Error] JclSynch.pas(1084): E2010 Incompatible types: 'Cardinal' and 'Boolean'
[dcc32 Fatal Error] JclMath.pas(3904): F2063 Could not compile used unit 'JclSynch.pas'

In the funcion JclWin32.CreateMutex the parameter InitialOwner is cardinal, although the value is boolean.

constructor TJclMutex.Create(SecAttr: PSecurityAttributes; InitialOwner: Boolean; const Name: string);
begin
  inherited Create;
  FName := Name;
  FHandle := JclWin32.CreateMutex(SecAttr, InitialOwner, PChar(Name));
  if FHandle = 0 then
    raise EJclMutexError.CreateRes(@RsSynchCreateMutex);
  FExisted := GetLastError = ERROR_ALREADY_EXISTS;
end;

[obones]

From what I see here the second parameter is typed BOOL which should be compatible with Boolean.

It may not be the case if you have aliased BOOL to something else, or if you have not updated properly your working copy because the last change to all this was back in 2015:
d624fd2

Are you sure you don't have remnants of a very old install?

[gamboajorge49]

I just cloned the master branch, is that correct? Or should I clone a specific tag?
I'm using Delphi 10.1 Berlin, compiling for 32 bits.

[obones]

That's the expected thing to do. However, if you have an outdated JclWin32 file on your machine, it will break.
Just to be clear, the JCL builds for all targets: https://github.com/project-jedi/tools/blob/master/build_results/jcl.md

[gamboajorge49]

Analyzing the JclWin32 unit here, I saw that it is correct, expecting the BOOL parameter, but in the IDE when I open the function to analyze internally it opens this WinBase.int file.

Is this correct or is there a problem with my installation or with the IDE?

[obones]

This is definitely an issue with your installation, WinBase.int the prototype from which other files are generated, you should never reference it. In particular, you should never have any of the source\prototypes folders in your search path.

[gamboajorge49]

Okay, it worked, that was it, thank you!!!