Hello Martin. Here better explanation of the utility of libX11.so (many thanks Graeme for the infos).
https://unix.stackexchange.com/questions/475/how-do-so-shared-object-numbers-work To resume: libX11.so (and then libx11-dev) is needed for the linker only. Here part of answer of stackexchange: /The reason for the symbolic link is for the linker. When you want to link against libpthread.so directly, you give gcc the flag -lpthread, and it adds on the lib prefix and .so suffix automatically. You can't tell it to add on the .so.0 suffix, so the symbolic link points to the newest version of the lib to faciliate that./ And this explain why libc-dev is not needed : the libc.so is not linked but loaded as "common" library. OK, I was wrong, I admit. But now I am richer (thanks to Graeme), I learn lot things. Fre;D -- View this message in context: http://mseide-msegui-talk.13964.n8.nabble.com/MSEide-MSEgui-talk-MSE-and-XLib-tp5p19.html Sent from the mseide-msegui-talk mailing list archive at Nabble.com. ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ mseide-msegui-talk mailing list mseide-msegui-talk@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mseide-msegui-talk