Request to remove RTTI requirement

[nirvedhmeshram]

Currently some parts of the XRT C++ API require use of RTTI which down stream projects may have disabled. To see the issue you may build this snippet.

https://gist.github.com/nirvedhmeshram/eb051397606439aa50016780ead8cf00

With the following compile command

clang++ -fno-rtti test.cpp -o test.exe -I/opt/xilinx/xrt/include -L/opt/xilinx/xrt/lib -lxrt_coreutil

We will have a runtime error with

./test.exe 
terminate called after throwing an instance of 'boost::wrapexcept<boost::bad_any_cast>'
  what():  boost::bad_any_cast: failed conversion using boost::any_cast
Aborted (core dumped)

if you remove -fno-rtti flag then it works but down stream projects may choose to not use rtti in which case we have problems.

[keryell]

I guess you need to compile XRT without RTTI at the first place to have it to work.

[stsoe]

XRT is built with rtti enabled which is the default in modern C++. I don't understand the aversion to building an application with rtti enabled, but regardless you don't have to, but you just can't use the info API which requires rtti. No other APIs rely on rtti being enabled.