yade-dev team mailing list archive

[Bruno Chareyre <bruno.chareyre@xxxxxxxxxxxxxxx>]

Tu peux ajouter la sortie de cmake a ton message? Pas dispo ce matin.
B

Le jeu. 28 mars. 2019 00:58, François <francois.kneib@xxxxxxxxx> a écrit :

> Thanks for your help. I'm on kubuntu 18.04 (cmake 3.10.2), and maybe our
> versions mismatch is at the origin of the issue (I finally found a
> solution, see the bottom of this message).
> By "installing" ccache I meant in fact "enable/use" ccache, I also
> installed it with "apt install ccache". Of course, I always start from an
> empty build dir.
>
> Now I restarted everything with a clean $PATH, reverting my changes. Using
> export CC and CXX doesn't work:
>
>> export CC="ccache gcc"
>> export CXX="ccache g++"
>> cmake -DCMAKE_INSTALL_PREFIX=../install ../trunk
>> [...]
>> *ccache: error: Could not find compiler "g++" in PATH*
>>
> Somebody had the same issue here:
> https://github.com/bazelbuild/bazel/issues/3642 so I tried unsuccessfully
> :
>
>> rm -r *
>> export CC="ccache /usr/bin/gcc"
>> export CXX="ccache /usr/bin/g++"
>> cmake -DCMAKE_INSTALL_PREFIX=../install ../trunk
>> [...]
>> */usr/bin/ccache: invalid option -- 'd'*
>>
> I didn't found exactly why, but somewhere the "-d" option is passed
> directly to ccache (instead of gcc/g++ I assume), but not in your 16.04
> system.
>
> So I tried two methods to use $PATH instead of $CXX and $CC:
> - the one in ccache documentation, with symlinks :
> https://ccache.samba.org/manual/latest.html#_run_modes
> - the one we can find everywhere with export PATH="/usr/lib/ccache:$PATH"
> But the result is finally the same as above.
>
> *OUTCOME*:
> I feel a bit confused as I spent some time to make it work to finally see
> that cmake handles ccache since version 3.4:
> https://cmake.org/cmake/help/v3.6/release/3.4.html#variables
> Without environment variables nor symlinks, the solution basically is to
> run cmake with "*-DCMAKE_CXX_COMPILER_LAUNCHER=ccache
> -DCMAKE_C_COMPILER_LAUNCHER=ccache*"
> Now ccache is activated, after a successful build I have 720.9 MB in
> cache, yade full build in 30s yeepee :-D
> This solution should also work for ubuntu 16.04 as it carries cmake 3.5,
> but not for ubuntu 14.04.
>
> NB: Interestingly, compiling [yade with python 3] for the first time with
> the full ccache of [yade with python 2.7] took about 5 mins against about
> 30min for a full uncached build.
>
> Cheers,
> François
>
>
>
>
> Le mer. 27 mars 2019 à 20:40, Bruno Chareyre <
> bruno.chareyre@xxxxxxxxxxxxxxx> a écrit :
>
>> I checked your ubuntu 12.04 page again. That's actually about hiding
>> ccache behind normal gcc invocation, and I kind-of dislike the idea.
>> Explicit call to «ccache g++» sounds cleaner to me and it is compatible
>> with mpicxx (for ubuntu 16.04 at least).
>> Better undo what you have done until now in terms of ccache hacks and
>> stick to yade doc's method if you are unsure.
>>
>> «ccache -s» also reports unsupported options on my ubuntu 16.04 but a
>> full rebuild takes 40sec regardless.
>>
>> Bruno
>>
>> Le mer. 27 mars. 2019 19:46, Bruno Chareyre <
>> bruno.chareyre@xxxxxxxxxxxxxxx> a écrit :
>>
>>> Also, did you start from fresh build after exporting CXX?
>>> I mean:
>>> rm -rf ./*
>>> export ...
>>> cmake [options]
>>> make -jN
>>>
>>> Bruno
>>>
>>> Le mer. 27 mars. 2019 18:33, Bruno Chareyre <
>>> bruno.chareyre@xxxxxxxxxxxxxxx> a écrit :
>>>
>>>> Hi François,
>>>>
>>>> Please remember to give your linux version.
>>>>
>>>> On Wed, 27 Mar 2019 at 17:44, François <francois.kneib@xxxxxxxxx>
>>>> wrote:
>>>>
>>>>> export CXX=ccache g++
>>>>>
>>>>>> bash: export: « g++ » : identifiant non valable
>>>>>>
>>>>> Using
>>>>>
>>>>>> export CXX='ccache g++'
>>>>>
>>>>> works
>>>>>
>>>>
>>>> Thanks for pointing that out. I forgot the " indeed, I'll fix it.
>>>> It would be useful to turn your bash to english for pasting errors here
>>>> (also much more efficient when searching online solutions).
>>>>
>>>>
>>>>
>>>>> but it will result in cmake fail while checking cc compiler.
>>>>> Finally, I "installed" ccache thanks to the first answer here:
>>>>> https://askubuntu.com/questions/470545/how-do-i-set-up-ccache and it
>>>>> *kinda* works.
>>>>>
>>>>
>>>> Arguably, using ccache is assuming that it is installed. ;)
>>>> Not sure why you needed that ubuntu 12.04 forum, as far as I remember I
>>>> only had to "apt-get install ccache".
>>>>
>>>>
>>>>>
>>>>>    - the second one, once the install is ok and cmake uses ccache, is
>>>>>    that I only get "unsupported compiler option" when I try *ccache
>>>>>    -s* after a full yade compilation. It results in a almost-empty
>>>>>    cache:
>>>>>
>>>>>
>>>> Does compilation work?
>>>> Could you send cmake output, and some sample of "make VERBOSE=1"?
>>>>
>>>> I have this:
>>>>
>>>> *[ 39%] Building CXX object
>>>> CMakeFiles/yade.dir/pkg/dem/Ig2_Box_Sphere_ScGeom.cpp.o/usr/bin/ccache
>>>> g++  -DBOOST_MATH_DISABLE_FLOAT128=1 -DNDE...*
>>>>
>>>> Cheers
>>>>
>>>> Bruno
>>>>
>>>> _______________________________________________
>> Mailing list: https://launchpad.net/~yade-dev
>> Post to     : yade-dev@xxxxxxxxxxxxxxxxxxx
>> Unsubscribe : https://launchpad.net/~yade-dev
>> More help   : https://help.launchpad.net/ListHelp
>>
> _______________________________________________
> Mailing list: https://launchpad.net/~yade-dev
> Post to     : yade-dev@xxxxxxxxxxxxxxxxxxx
> Unsubscribe : https://launchpad.net/~yade-dev
> More help   : https://help.launchpad.net/ListHelp
>