Failure when building ROOT 6.12.04 on Ubuntu 17.10

[pleskot]

Dear experts,

I am trying to build ROOT 6.12.04 on Ubuntu 17.10. I did the following steps suggested at https://root.cern.ch/building-root:

1. sudo apt-get install git dpkg-dev cmake g++ gcc binutils libx11-dev libxpm-dev
   libxft-dev libxext-dev
2. mkdir build; cd build
3. cmake …/root-6.12.04/
4. cmake --build .

I got the following error message:

[ 91%] Linking CXX shared library ../../lib/libASImage.so
/usr/bin/ld: cannot find -l/usr/lib/x86_64-linux-gnu/libX11.so
collect2: error: ld returned 1 exit status
graf2d/asimage/CMakeFiles/ASImage.dir/build.make:179: recipe for target
'lib/libASImage.so' failed
make[2]: *** [lib/libASImage.so] Error 1
CMakeFiles/Makefile2:22299: recipe for target
'graf2d/asimage/CMakeFiles/ASImage.dir/all' failed
make[1]: *** [graf2d/asimage/CMakeFiles/ASImage.dir/all] Error 2
Makefile:151: recipe for target 'all' failed
make: *** [all] Error 2

Of course, I checked that /usr/lib/x86_64-linux-gnu/libX11.so existed - it is a symlink to an existing library.
Could you help me to solve the problem, please?
Best regards

Vojtech

[couet]

may be try to activate -Dbuiltin_afterimage=ON

[pleskot]

Thank you very much, it helped.
Btw. I also checked that installing the package libafterimage-dev would help as well (without turning the builtin_afterimage on).
Best regards
Vojtech