Re: Bug#729876: aghermann: FTBFS on ia64, powerpc, s390x, sparc, ppc64, sh4: configure: error: g++ >= 4.7 is required

[Hiroyuki Yamamoto <yama1066@gmail.com>]

Hi,

Thanks for a patch , Andrei.

However, with considering of happiness for all package maintainers,
maybe it is good that gcc-defaults shifts using unified version of gcc on all architectures,
e.g. dealing with c++11.

Matthias Klose posted a plan of updating default gcc,
but since applied only some architectures, there is no change recently.
http://lists.debian.org/debian-devel-announce/2013/05/msg00005.html
http://lists.debian.org/debian-devel/2013/05/msg00259.html

Unfortunately, on sh4, gcc-4.8 has not succeeded to build yet,
but the other architectures have ever succeeded. 
http://buildd.debian-ports.org/status/logs.php?pkg=gcc-defaults&arch=sh4

Best regards,
-- 
Hiroyuki Yamamoto
A75D B285 7050 4BF9 AEDA  91AC 3A10 59C6 5203 04DC

andrei zavada wrote:
> Hi,
> 
> I added to debian/rules a small amount of bash code which selects the best
> available g++ (trying first g++-4.8 then 4.7, both of which are known to
> work) and assigns it to CXX.  After that, ./configure will use $CXX (not
> whatever g++ happens to be), and therein lieth the fix.
> 
> This is the relevant part:
> 
>  %:
> 	for v in 4.8 4.7; do \
> 	  g=`which g++-$$v`; \
> 	  if test -n "$$g"; then \
> 	    $$g >/dev/null 2>&1; \
> 	    if [ $$? != 127 ]; then export CXX=`which g++-$$v`; break; fi \
> 	  fi \
> 	done; \
> 	dh $@ --with autoreconf
> 
> The check for exit code 127 is required to detect the case of /usr/bin/g++-4.x
> existing (as a symlink) without g++-4.x actually installed.  This is actually
> the case with g++-4.9:
> 
>  $ g++-4.9
>  /usr/bin/g++-4.9: not found (maybe g++-4.9 is not installed?)
>  $ echo $?
>  127
> 
> Unless anyone suggests a better solution, I would ask my trusty sponsor
> Yaroslav to proceed with upload from
> http://johnhommer.com/academic/code/aghermann/source/deb/aghermann_1.0-2.dsc.
> 
> Thanks
> Andrei
> 
> On Mon, 18 Nov 2013 23:34:17 +0900
> Hiroyuki Yamamoto <yama1066@gmail.com> wrote:
> 
>> Source: aghermann
>> Version: 1.0-1
>> Severity: serious
>> Justification: FTBFS by unsatisfiable build-dependency
>>
>> aghermann cannot be built on ia64, powerpc, s390x, sparc, ppc64, sh4,
>> which use gcc-4.6 designated by gcc-defaults_1.123,
>> so, maybe on alpha, too.
>>
>> https://buildd.debian.org/status/package.php?p=aghermann&suite=sid
>> http://buildd.debian-ports.org/status/package.php?p=aghermann&suite=sid
>>
>>> configure: error: g++ >= 4.7 is required to build aghermann as we must
>>> use -std=c++11 features your compiler doesn't seem to support checking
>>> whether g++ has all required c++11 features... no
>>
>> On powerpcspe, its sbuild may not be maintained as clean-build environment,
>> and all of g++-4.6, g++-4.7, g++-4.8 are installed, so building succeeded.
>>
>> Regards,
>