internal error with -fno-rounding-math

[tp5]

$ icc -fno-rounding-math
icc: internal error: Assertion failed (shared/driver/options.c, line 1684)
$ icc --version
icc (ICC) 14.0.2 20140120

[TimP]

This setting presumably is the default one (maybe not capable of alteration) for icc.  Of course, internal error is a reportable bug.

[pbkenned1]

It's unusual to see a compiler internal error with no input file specified (I can also reproduce the same error by providing one).  Thanks for reporting this, I'll file a defect report with the developers.

Patrick

[pbkenned1]

Reported to the developers, tracking ID #DPD200254960.  I'll keep this thread updated with any news.

Patrick

[Jeff_Arnold]

The same error occurs on Mac OS as well.

[pbkenned1]

Thanks for the feedback Jeff, I'll add Mac as an effected OS to the developer's problem report.

Apparently icc-14 is the first version to attempt to support -f[no-]rounding-math.  icc-13.x just reports it as an 'unknown option'.

At least -frounding-math does work in icc-14:

$ icc -V -frounding-math fp_mantissa.c && ./a.out
Intel(R) C Intel(R) 64 Compiler XE for applications running on Intel(R) 64, Version 14.0.2.144 Build 20140120
Copyright (C) 1985-2014 Intel Corporation.  All rights reserved.

Edison Design Group C/C++ Front End, version 4.6 (Jan 20 2014 19:26:22)
Copyright 1988-2013 Edison Design Group, Inc.

GNU ld version 2.20.51.0.2-5.28.el6 20091009
mantissa:53
$

Patrick