Build error with ifx on Windows

[LaplaceSoda]

Description

After updating stdlib, the following error occurs when compiling to stdlib_system.c using fpm run --compiler ifx --flag "-Qmkl":

stdlib_system.c(174,38): error: call to undeclared function 'S_ISREG'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
  174 |     return _stat(path, &buf) == 0 && S_ISREG(buf.st_mode);
      |                                      ^

Environment

Windows + Intel oneAPI 2024.2 + fpm 0.11.0

Intel(R) Fortran Compiler for applications running on Intel(R) 64, Version 2024.2.0 Build 20240602
Copyright (C) 1985-2024 Intel Corporation. All rights reserved.

Version

fpm will fetch the latest version from the stdlib-fpm branch

[dependencies]
openmp = "*"
stdlib = { git = "https://github.com/fortran-lang/stdlib", branch = "stdlib-fpm", preprocess.cpp.macros = [
    "STDLIB_EXTERNAL_BLAS",
    "STDLIB_EXTERNAL_LAPACK",
] }

Expected Behaviour

Compile normally like the previous versions

Version of stdlib

latest

Platform and Architecture

Windows

Additional Information

No response

[Romendakil]

This is a C compiler error, and has to do with the fact that the function S_ISREG has not been declared in stdlib_system.c.
It should have been defined by the inclusion of <sys/stat.h>, so maybe the usage is incorrect (i.e. incorrect type of the argument)?

[LaplaceSoda]

the function S_ISREG has not been declared in stdlib_system.c. It should have been defined by the inclusion of <sys/stat.h>

I don't think so... It seems that <sys/stat.h> from the MSVC/UCRT does not provide the POSIX-style S_ISREG macros just like the discussion.

[LaplaceSoda]

I've created a Pull Request to address this: #1061