Re: Compile error in latest repository tip

[Daniel J Sebald]

On 03/03/2016 02:44 PM, Mike Miller wrote:
> On Thu, Mar 03, 2016 at 14:38:33 -0600, Daniel J Sebald wrote:
> > [@ build7]# grep -E "^(CXX|CXXFLAGS|XTRA_CXXFLAGS) =" Makefile
> > CXX = g++
> > CXXFLAGS = -g -O2
> > XTRA_CXXFLAGS =  -pthread -fopenmp
>
> Hmm, there should be a -std=something in there. Can you check config.log
> for tests relating to C++11 (or send the whole config.log to me)?

That option apparently fails:

configure:6623: gcc -std=gnu11 -c -g -O2  conftest.c >&5
cc1: error: unrecognized command line option "-std=gnu11"
configure:6623: $? = 1
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME "GNU Octave"
| #define PACKAGE_TARNAME "octave"
| #define PACKAGE_VERSION "4.1.0+"
| #define PACKAGE_STRING "GNU Octave 4.1.0+"
| #define PACKAGE_BUGREPORT "http://octave.org/bugs.html";


> > I must have missed out on a discussion about compiler version.  g++ is the
> > same as gcc installed, but the config.log shows
> >
> > configure:6029: gcc --version>&5
> > gcc (GCC) 4.5.1 20100924 (Red Hat 4.5.1-4)
> > Copyright (C) 2010 Free Software Foundation, Inc.
> > This is free software; see the source for copying conditions.  There is NO
> > warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
> >
> > so I'm guessing 5.0+ is needed.
>
> I have definitely been able to build with gcc 4.4, there are some minor
> nits to fix with gcc 4.6, maybe some different issue with 4.5.
>
> Just curious, what distro are you on that you are using an old
> development branch version of gcc? I know CentOS is 4.4 or 4.8, Ubuntu
> is 4.6 or 4.8.

Version?  Abacus-age, probably.  I might switch from RedHat (14?) to 
Mint, maybe this summer sometime.

Dan