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Re: I sent in a bug report and never heard anything back
- From: jeff at jeffunit dot com
- To: cygwin at cygwin dot com
- Date: Fri, 26 Aug 2016 07:30:21 -0700
- Subject: Re: I sent in a bug report and never heard anything back
- Authentication-results: sourceware.org; auth=none
In reference to http://sourceware.org/ml/cygwin/2016-08/msg00261.html
I have a small program that generates an internal compiler error.
This only happens on a new dell notebook with an Intel 3825U pentium .
The code compiles and runs fine on an older xeon and amd processors.
Enclosed is the output of cygcheck.
Here is what happens when I try to compile:
sh-4.3$ gcc bug_f2.c
bug_f2.c: In function 'Round':
bug_f2.c:23:5: internal compiler error: Illegal instruction
return floor(d + 0.5);
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
Here is the source code:
/#include <string.h> /* strlen */
#include <math.h> /* floor */
#include <limits.h> /* INT_MAX, INT_MIN */
#include <assert.h> /* assert */
/*+Input: A double.
Output: Rounded input.
Action: Rounded input. +*/
extern double Round(double d)
return floor(d + 0.5);
Marco Atzeri wrote:
the code compile on both 32bit and 64 bit version of gcc
As it is a not stand alone program
gcc -c bug_f2.c
should be used.
Thanks for noting the code compiles on 32 and 64 bit architectures.
The code is over a decade old, and has compiled and worked on many ersions
and linux. I specifically mentioned it compiled on cygwin with different
That was never in question.
The issue is the internal compiler error coming from gcc on my dell with a
intel processor. An internal compiler error does not mean the source code
has a syntax error,
it means the compiler has a bug (which I suspect is related to the
Based on myexperience, the two most likely possibilities are:
1) somehow my cygwin installation is bad. That is why I included the
output of cygcheck.
2) there is a cpu specific internal compiler error with gcc.
If 1) is the case, it is possible there is a bug with the cygwin
installer. If 2) is the case,
then the bug should be reported to the gcc maintainers. Since the compiler
is a bit old,
I suspect they will say update the compiler, which is likely something
that cygwin should
do ao it may benefit everyone, not just me.
Problem reports: http://cygwin.com/problems.html
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