Conflict with other Eigen Dependents Template Libraries

[MehdiN]

I noticed conflict happens when RandEigen is used alongside another library which also uses eigen.
The conflict only happens with the definition of plgamma

<command-line>: note: this is the location of the previous definition
In file included from /usr/include/eigen3/unsupported/Eigen/SpecialFunctions:47,
                 from /usr/include/eigen3/unsupported/Eigen/CXX11/Tensor:30,
                 from /opt/ros/noetic/include/pinocchio/fwd.hpp:31,
                 [...]
/usr/include/eigen3/unsupported/Eigen/src/SpecialFunctions/SpecialFunctionsPacketMath.h:19:8: error: redefinition of ‘template<class Packet> Packet Eigen::internal::plgamma(const Packet&)’
   19 | Packet plgamma(const Packet& a) { using numext::lgamma; return lgamma(a); }
      |        ^~~~~~~
In file included from /usr/local/include/EigenRand/RandUtils.h:15,
                 from /usr/local/include/EigenRand/Core.h:16,
                 from /usr/local/include/EigenRand/EigenRand:17,
                 [...]
/usr/local/include/EigenRand/MorePacketMath.h:181:30: note: ‘template<class Packet> Packet Eigen::internal::plgamma(const Packet&)’ previously declared here
  181 |   EIGEN_STRONG_INLINE Packet plgamma(const Packet& x)
      |                              ^~~~~~~

Once plgamma is commented, it compiles just fine. (Also removing the comments and compiling a second time does not
raise any error. The error comes for the first build or after a make clean).

I tried to avoid circular declaration in my own code, it might be an error from my side but I reported it just in case.

CXX compiler: GNU 9.3.0
cmake version 3.16.3
Eigen 3.3.7
RandEigen version 0.3.2

[bab2min]

Hi @MehdiN,
Thank you for your reporting.
I didn't know there is another plgamma in Eigen's SpecialFunctionsPacketMath.h.
I'll rename my plgamma for preventing conflicts in the next update.

[bab2min]

Solved in version 0.3.3.