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
