topic ifx, -gen-dep generates incorrect dependencies if -fpp is used in Intel® Fortran Compiler

ifx, -gen-dep generates incorrect dependencies if -fpp is used

Miguel_V_ — Fri, 30 May 2025 18:17:56 GMT

The following minimum example code (example.f):

program example write (*,*) 'Hello world' end

When compiled with:

ifx -c example.f -gen-dep=example.d

generates a correct dependency file:

example.o : \
example.f

But, when compiled with -fpp:

ifx -fpp -c example.f -gen-dep=example.d

Then, the dependency file is incorrect:

example.o : \
/tmp/ifx00788182170K24b3/ifxOJO6SA.i

The version used:

$ ifx --version
ifx (IFX) 2025.1.0 20250317
Copyright (C) 1985-2025 Intel Corporation. All rights reserved.

This error was not present with ifort.

Thanks in advance.

Re:ifx, -gen-dep generates incorrect dependencies if -fpp is used

Ron_Green — Fri, 30 May 2025 22:56:46 GMT

Bug ID is CMPLRLLVM-68142. thank you for sending this to us.

Re: ifx, -gen-dep generates incorrect dependencies if -fpp is used

Miguel_V_ — Sat, 20 Sep 2025 09:13:19 GMT

This issue still exists in 2025.2.1. Do you have a time estimation on when this is going to be fix?

Re: ifx, -gen-dep generates incorrect dependencies if -fpp is used

JohnNichols — Sat, 20 Sep 2025 16:17:57 GMT

The lead cylce time on OneAPI releases appears to be in the order of a year, so like all of use you just wait and see what you get. Just use IFORT and do not throw it away.

Re:ifx, -gen-dep generates incorrect dependencies if -fpp is used

Igor_V_Intel — Thu, 15 Jan 2026 21:57:33 GMT

The bug is fixed in the latest 2025.3 compiler release.