topic Re: Odd handling of compile options - -warn:all in Intel® Fortran Compiler

Odd handling of compile options - -warn:all

Arjen_Markus — Mon, 02 Feb 2026 08:00:23 GMT

I noticed a peculiar problem with ifx: any unknown option specifed after "-warn:all" (or "-warn all" on LInux) gets ignored. Here is a transcript of the phenomenon:

c:>ifx hello.f90 -warn:all -abcxyz Intel(R) Fortran Compiler for applications running on Intel(R) 64, Version 2025.0.0 Build 20241008 Copyright (C) 1985-2024 Intel Corporation. All rights reserved. Microsoft (R) Incremental Linker Version 14.44.35217.0 Copyright (C) Microsoft Corporation. All rights reserved. -out:hello.exe -subsystem:console hello.obj c:>ifx hello.f90 -check:all -abcxyz Intel(R) Fortran Compiler for applications running on Intel(R) 64, Version 2025.0.0 Build 20241008 Copyright (C) 1985-2024 Intel Corporation. All rights reserved. ifx: command line warning #10006: ignoring unknown option '/abcxyz' Microsoft (R) Incremental Linker Version 14.44.35217.0 Copyright (C) Microsoft Corporation. All rights reserved. -out:hello.exe -subsystem:console hello.obj

No warning or error about the strange option "/abcxyz" after
"-warn:all", but there is one after "-check:all". I noticed this on both Windows and Linux.

Re: Odd handling of compile options - -warn:all

Igor_V_Intel — Tue, 03 Feb 2026 21:42:49 GMT

I don't see this problem on Linux:

$ ifx main.f90 -warn all -aasfdasdf
ifx: command line warning #10006: ignoring unknown option '-aasfdasdf'

$ ifx --version
ifx (IFX) 2025.3.2 20260112

But I can see it with older versions, e.g. 2025.2 or the one you are using (2025.0):

$ ifx main.f90 -warn all -aasfdasdf
$ ifx --version
ifx (IFX) 2025.2.1 20250806

The bug is fixed, please use the latest version.

Re: Odd handling of compile options - -warn:all

Arjen_Markus — Wed, 04 Feb 2026 07:23:17 GMT

Ah, good to know it has been solved. I will have to see that we can move to the latest version.