https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79974
Bug ID: 79974
Summary: First line of file is printed with unrecognized -mtune
x86 option
Product: gcc
Version: 5.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: driver
Assignee: unassigned at gcc dot gnu.org
Reporter: noloader at gmail dot com
Target Milestone: ---
I'm working on a VIA C7-D processor. GCC version is 5.4.0 from Ubuntu. I'm
attempting to use GCC's -mtune=c7 option
(https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html):
$ cat test.cxx
// Test file
int main(int argc, char* argv[])
{
return 0;
}
Attempting to compile results in:
$ g++ -march=native -mtune=c7 test.cxx -o test.exe
test.cxx:1:0: error: bad value (c7) for -mtune= switch
// Test file
^
Flagging line 0 of the file seems unusual, especially since its just a comment.
It seems like the -mtune error should be printed and nothing more because the
comment has nothing to do with the issue.
I recall seeing the unusual output on Cygwin when using -fPIC. The Cygwin
behavior was fixed, IIRC.
**********
$ gcc --version
gcc (Ubuntu 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609
Copyright (C) 2015 Free Software Foundation, Inc.
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.2 LTS
Release: 16.04
Codename: xenial
