Unable to build pd extension

[dvzrv]

Hi! When building the pd extension from the 0.5.0 sources for Arch Linux I have to apply a few fixes, as the build fails otherwise:

/build/marsyas/src/marsyas-0.5.0/src/marsyas_pd/ibt_pd.cpp: In function ‘void* ibt_pd_new(t_symbol*, int, t_atom*)’:
/build/marsyas/src/marsyas-0.5.0/src/marsyas_pd/ibt_pd.cpp:200:48: error: invalid conversion from ‘const char*’ to ‘char*’ [-fpermissive]
  200 |       x->outPathName = atom_getsymbol(argv+1)->s_name;
      |                        ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~
      |                                                |
      |                                                const char*

If this is cast, there's still a problem with the cmake setup:

[ 91%] Linking CXX shared library ../../lib/ibt_pd.pd_linux
cd /build/marsyas/src/marsyas-0.5.0/build/src/marsyas_pd && /usr/bin/cmake -E cmake_link_script CMakeFiles/ibt_pd.dir/link.txt --verbose=1
/usr/bin/c++ -fPIC -std=c++11 -Wall -Wextra -fPIC -O3 -DNDEBUG -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -shared -Wl,-soname,ibt_pd.pd_linux -o ../../lib/ibt_pd.pd_linux CMakeFiles/ibt_pd.dir/ibt_pd.cpp.o CMakeFiles/ibt_pd.dir/IBT.cpp.o  ../../lib/libmarsyas.so --export-dynamic -shared -lmad -logg -lvorbis -lv
orbisfile -lvorbisenc -ljack -lasound -lpthread -lrt -lmad ../../lib/liboscpack.a -lmp3lame -logg -lvorbis -lvorbisfile -lvorbisenc
c++: error: unrecognized command-line option ‘--export-dynamic’; did you mean ‘-export-dynamic’?
make[2]: *** [src/marsyas_pd/CMakeFiles/ibt_pd.dir/build.make:133: lib/ibt_pd.pd_linux] Error 1
make[2]: Leaving directory '/build/marsyas/src/marsyas-0.5.0/build'
make[1]: *** [CMakeFiles/Makefile2:2653: src/marsyas_pd/CMakeFiles/ibt_pd.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....