octave-image needs a compiler with c++0x support

[someuser12]

Build of octave-image under Mac OS 10.6 with Xcode 3.2.6 fails because the default compiler (/usr/bin/c++ == i686-apple-darwin10-g++-4.2.1) doesn't support the --std=cxx0 option.

Error message:

--->  Configuring octave-image
mkdir (/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_math_octave-image/octave-image/work/.tmp/oct-CC0QoM)
untar (/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_math_octave-image/octave-image/work/.tmp/image.tar.gz, /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_math_octave-image/octave-image/work/.tmp/oct-CC0QoM)
checking whether the C++ compiler works... no
configure: error: in `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_math_octave-image/octave-image/work/.tmp/oct-CC0QoM/image/src':
configure: error: C++ compiler cannot create executables
See `config.log' for more details

pkg: error running the configure script for image.
error: called from 'configure_make' in file /opt/local/share/octave/3.8.1/m/pkg/private/configure_make.m near line 72, column 9
error: called from:
error:   /opt/local/share/octave/3.8.1/m/pkg/private/install.m at line 199, column 5
error:   /opt/local/share/octave/3.8.1/m/pkg/private/build.m at line 50, column 3
error:   /opt/local/share/octave/3.8.1/m/pkg/pkg.m at line 516, column 7
Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_math_octave-image/octave-image/work/image" && /opt/local/bin/octave -q -f --eval 'pkg build -verbose -nodeps /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_math_octave-image/octave-image/work/image /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_math_octave-image/octave-image/work/.tmp/image.tar.gz'

Attached is a very crude patch which selects gcc-mp-4.8 under Mac OS 10.6 (what about earlier?). It would probably be better to just specify that a c++ compiler with c++11 support is needed, but I don't know how to express it. If anybody can help... Thanks!

[someuser12]

Patch to the portfile of octave-image

[ryandesign (Ryan Carsten Schmidt)]

We don't have a syntax for expressing that a C++11 compiler is needed. Ports that require a C++11 compiler basically require OS X 10.9 or later at this point.

[MarcusCalhoun-Lopez (Marcus Calhoun-Lopez)]

I think this ticket can safely be closed.
The octave PG now ​ensures that a C++11 compiler is used.