Error Compiling ROOT 6.20/04

ROOT
1

ROOT Version: 6.20/04
Platform: Linux: 64 bit Fedora32 (5.6.18-300.fc32.x86_64)
Compiler: gcc (GCC) 10.1.1 20200507 (Red Hat 10.1.1-1); Python 3.8.3

I am trying to compile Release 6.20/04 - 2020-04-01 on 64 bit Fedora 32 as:
cmake ../root-6.20.04 -DCMAKE_INSTALL_PREFIX=../root_install
and then
cmake --build . -- -j8
But, the compilation fails with the following error:

[ 81%] Built target Geom
In module 'std' imported from input_line_1:1:
/usr/lib/gcc/x86_64-redhat-linux/10/../../../../include/c++/10/bits/unique_ptr.h:207:12: error: 'std::__uniq_ptr_data<ROOT::Experimental::TTaskGroup, std::default_delete<ROOT::Experimental::TTaskGroup>, true, true>' has different
      definitions in different modules; definition in module 'std.condition_variable' is here
    struct __uniq_ptr_data : __uniq_ptr_impl<_Tp, _Dp>
           ^
/usr/lib/gcc/x86_64-redhat-linux/10/../../../../include/c++/10/bits/unique_ptr.h:207:12: note: definition in module 'std.condition_variable' is here
Scanning dependencies of target G__Quadp
[ 81%] Building CXX object math/quadp/CMakeFiles/G__Quadp.dir/G__Quadp.cxx.o
Scanning dependencies of target G__Physics
[ 81%] Building CXX object math/physics/CMakeFiles/G__Physics.dir/G__Physics.cxx.o
Scanning dependencies of target G__Proof
[ 81%] Building CXX object proof/proof/CMakeFiles/G__Proof.dir/G__Proof.cxx.o
Error: Error loading the #pragma extra_include.
gmake[2]: *** [bindings/pyroot/CMakeFiles/G__PyROOT.dir/build.make:105: bindings/pyroot/G__PyROOT.cxx] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:26351: bindings/pyroot/CMakeFiles/G__PyROOT.dir/all] Error 2
gmake[1]: *** Waiting for unfinished jobs....
[ 81%] Built target G__Physics
[ 81%] Built target G__Quadp
[ 81%] Built target G__Proof
[ 81%] Built target G__Hist
gmake: *** [Makefile:172: all] Error 2

Does anyone have any idea about this problem and its solution?

Regards,

Ajay

2

See here:

3

Ok.
Thank you.

4

Does configuring the build with -Druntime_cxxmodules=OFF help?

1 Like
5

I think, -Druntime_cxxmodules is OFF by default. Please check Build Options.

EDIT: Strangely enough, it compiled without complaining!
Please note that - I never set -Druntime_cxxmodules to ON or OFF. By default, it is OFF, and ROOT (6.20/04) doesn’t compile. But, if I manually set it OFF then it compiles! Can you explain this behaviour?

6

I’m happy it worked!

The page you linked to is out of date, the default was changed to ON in v6.20. You can check with git grep ROOT_BUILD_OPT cmake | grep runtime_cxx.

Cheers,
Enrico

8

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