Can't compile

[仁义_许_]

The legacy project builds and debugs successfully, whereas the new project fails to compile：

error LNK2019:unresolved external symbol WinMain，referenced in function "int __cdecl invoke_main(void)"

visual stuido edtion is 17.14.9 (July 2025) which is updated.

while input ifort --version:

ifort: remark #10448: Intel(R) Fortran Compiler Classic (ifort) is now deprecated and will be discontinued late 2024. Intel recommends that customers transition now to using the LLVM-based Intel(R) Fortran Compiler (ifx) for continued Windows* and Linux* support, new language support, new language features, and optimizations. Use '/Qdiag-disable:10448' to disable this message.
ifort: command line warning #10006: ignoring unknown option '/-version'
ifort: command line error: no files specified; for help type "ifort /help"

I need trasition to using the LLVM-based ifx?  Is this the reason of failure to compile the new projects?

[Arjen_Markus]

It is more likely that your project does not have a proper main program. Could you check that?

[仁义_许_]

I test only a few lines:

program main
implicit none
integer::i=6
write(*,*)i
end

[andrew_4619]

"unresolved external symbol WinMain"  if the project options are for a windows application the entry point is "WinMain" you have a Program statement so the project type needs to be "console program".

[Ron_Green]

make sure you create a Console application:

https://www.intel.com/content/www/us/en/docs/fortran-compiler/developer-guide-reference/2025-2/create-a-new-project.html