You cmake logs says: > qmake: could not exec '/usr/lib/x86_64-linux-gnu/qt4/bin/qmake': No such file or directory > -- Found unsuitable Qt version "" from NOTFOUND
I discovered that yesterday to. I'm really not sure it is related to the ccache problem but it is strange. Try "sudo apt install qt5-default"? It fixes the problem partly on 16.04. I noticed the -DCMAKE_CXX_COMPILER_LAUNCHER indeed, but to me that's just another way, not the unique way, since ccache is supposed to be used even without cmake. It is suprising that "ccache g++" can't find g++ while g++ is available system-wide, but... yes maybe a 18.04 feature... Cheers Bruno On Thu, 28 Mar 2019 at 07:48, François <francois.kn...@gmail.com> wrote: > Here attached is the full cmake output when I did: > >> rm -r * >> export CC="ccache /usr/bin/gcc" >> export CXX="ccache /usr/bin/g++" >> cmake -DCMAKE_INSTALL_PREFIX=../install ../trunk >> > > > Le jeu. 28 mars 2019 à 06:48, Bruno Chareyre < > bruno.chare...@3sr-grenoble.fr> a écrit : > >> Tu peux ajouter la sortie de cmake a ton message? Pas dispo ce matin. >> B >> >> Le jeu. 28 mars. 2019 00:58, François <francois.kn...@gmail.com> 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.chare...@3sr-grenoble.fr> 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.chare...@3sr-grenoble.fr> 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.chare...@3sr-grenoble.fr> a écrit : >>>>> >>>>>> Hi François, >>>>>> >>>>>> Please remember to give your linux version. >>>>>> >>>>>> On Wed, 27 Mar 2019 at 17:44, François <francois.kn...@gmail.com> >>>>>> 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@lists.launchpad.net >>>> Unsubscribe : https://launchpad.net/~yade-dev >>>> More help : https://help.launchpad.net/ListHelp >>>> >>> _______________________________________________ >>> Mailing list: https://launchpad.net/~yade-dev >>> Post to : yade-dev@lists.launchpad.net >>> Unsubscribe : https://launchpad.net/~yade-dev >>> More help : https://help.launchpad.net/ListHelp >>> >> _______________________________________________ > Mailing list: https://launchpad.net/~yade-dev > Post to : yade-dev@lists.launchpad.net > Unsubscribe : https://launchpad.net/~yade-dev > More help : https://help.launchpad.net/ListHelp > -- -- _______________ Bruno Chareyre Associate Professor ENSE³ - Grenoble INP Lab. 3SR BP 53 38041 Grenoble cedex 9 Tél : +33 4 56 52 86 21 Fax : +33 4 76 82 70 43 ________________ Email too brief? 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