Thanks! I also needed to set sudo update-alternatives --install /usr/bin/cpp cpp /usr/bin/cpp-7 7 sudo update-alternatives --install /usr/bin/cpp cpp /usr/bin/cpp-8 8
for a successful build. I still have warnings "MPFR header version 4.0.1 differs from library version 4.0.2-p6" which I would like to understand but at least I now have a running gnuradio 3.9 to work with. Rick On 2021-08-16 6:06 p.m., Ron Economos wrote: > You can use update-alternatives to select the C/C++ compiler version. > > First, you set up each version. > > sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-7 7 > --slave /usr/bin/g++ g++ /usr/bin/g++-7 > > sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 8 > --slave /usr/bin/g++ g++ /usr/bin/g++-8 > > Then you select which one is the system default. > > sudo update-alternatives --config gcc > > Ron > > On 8/16/21 3:17 PM, Aardric wrote: >> Hail, >> What is the recommended method to set the gcc compiler used by >> PyBOMBS in building with gnuradio.lwr (gitbranch: maint-3.9)? >> I am trying to trace back problems but first should use 8.2.1 (installed >> as /usr/bin/gcc-8) as opposed to the system gcc which is 7.5.0. I >> assume that CMAKE_CXX_COMPILER_VERSION must be defined somewhere. >> >> Rick >> >> >> >>
