Installation problem root 6.06.02 mixmax.h

[guido.fantini]

Dear Experts,

I am trying to install ROOT 6.06.02 from source on a virtual machine running Ubuntu 16.10 x64.
At some point during the installation I get this error message:

guido@guido-VM:~/root-6.06.02$ make install
g++ -O2 -DNDEBUG -pipe -m64 -std=c++11 -Wshadow -Wall -W -Woverloaded-virtual -fPIC -Iinclude -Wno-deprecated-declarations -pthread -DUSE_ROOT_ERROR -MMD -MP -o math/mathcore/src/MixMaxEngine.o -c /home/guido/root-6.06.02/math/mathcore/src/MixMaxEngine.cxx
In file included from /home/guido/root-6.06.02/math/mathcore/src/MixMaxEngine.cxx:19:0:
/home/guido/root-6.06.02/math/mathcore/src/mixmax.h:137:23: error: exponent has no digits
#define INV_MERSBASE (0x1p-61)
^
/home/guido/root-6.06.02/math/mathcore/src/mixmax.h:211:17: note: in expansion of macro ‘INV_MERSBASE’
return Z*INV_MERSBASE;
^~~~~~~~~~~~
Makefile:655: set di istruzioni per l’obiettivo “math/mathcore/src/MixMaxEngine.o” non riuscito
make: *** [math/mathcore/src/MixMaxEngine.o] Errore 1

Can someone help me out please?

I thank you very much
Guido

[Axel]

Hi Guido,

This was fixed in subsequent versions to read:

#define INV_MERSBASE (0.4336808689942017736029811203479766845703E-18)

You should be able to simply edit the file and continue the build from there.

Cheers, Axel.

[guido.fantini]

Thank you very much, I implemented it and the problem was solved.

Cheers,
Guido