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Re: [Discuss-gnuradio] install issue with c++11


From: Jason Matusiak
Subject: Re: [Discuss-gnuradio] install issue with c++11
Date: Tue, 05 Jun 2018 06:07:08 -0700
User-agent: MailAPI

Thanks Dave, but that did not seem to work for me.  Here were the commands I ran (slightly different than recommended, but that was for some different recipe mods that have nothing to do with this issue):

$ export CXXFLAGS="-std=c++11"
$ PREFIX=/opt/gnuradio/v3.7.12.0
$ yes | pybombs prefix init $PREFIX
$ yes | pybombs -p $PREFIX recipes add gr-recipes git+https://github.com/gnuradio/gr-recipes.git
$ source /opt/gnuradio/v3.7.12.0/setup_env.sh
$ pybombs -vvv -p $PREFIX install gnuradio

And currently things keep erroring out at the same place while installing UHD:

[ 43%] Building CXX object lib/CMakeFiles/uhd.dir/usrp/dboard/magnesium/magnesium_radio_ctrl_impl.cpp.o
[ 43%] Building CXX object lib/CMakeFiles/uhd.dir/usrp/dboard/magnesium/magnesium_radio_ctrl_init.cpp.o
c++: internal compiler error: Killed (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://bugzilla.redhat.com/bugzilla> for instructions.
make[2]: *** [lib/CMakeFiles/uhd.dir/usrp/dboard/magnesium/magnesium_radio_ctrl_init.cpp.o] Error 4
make[2]: *** Waiting for unfinished jobs....

I've also tried env CXXFLAGS=-std=c++11, but it had the same issues.

 

Jason,
 
     You can set the CXXFLAGS env variable to "-std=c++11" and any CMake builds you run (assuming the same shell) will check the CXXFLAGS var first.  This assumes that you don't overwrite the value of CMAKE_CXX_FLAGS.  I just tried it in a terminal with `export CXXFLAGS="-std=c++11"`, then `cmake ..`, and finally `VERBOSE=1 make -j 1`.  The verbose make command will show you if your flags are taking or not.
 
-Dave

On Tue, Jun 5, 2018 at 8:00 AM Jason Matusiak <address@hidden> wrote:
I am trying to install gnuradio onto a Centos 7 box and am having more and more issues with packages that use c++11 commands.  For some of the packages, I add the line:
CMAKE_CXX_FLAGS "-std=c++11"
to the module's CMakeLists.txt file.
 
The issue is that that requires a fetch, the mod, and then a rebuild.  This worked OK with it was just gqrx I was doing it for, but now I need it for other modules it appears, and so I am trying to find a more elegant solution that covers everything that is built via a pybombs install gnuradio command (like gr-blocks, which I can't use this trick for).
 
If I understand the problem correctly, Ubuntu uses new enough tools to realize that it needs to use the c++11 version (or newer I assume) to build since it is needed.  It seems like even though Centos 7 has the c++11 capability, it does not smartly trying to use it, and must be directed to for the installs to work.
 
Is there something I can do at an upper level to make things happy on an install?
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