g++: Command not found

g++ is installed, but still got this error

+ make -j3
g++ -std=c++11 -c rquery.cpp
make: g++: Command not found
make: *** [rquery.o] Error 127
error: Bad exit status from /var/tmp/rpm-tmp.rAdgjR (%build)
RPM build errors:
    Bad exit status from /var/tmp/rpm-tmp.rAdgjR (%build)
Error: action failed with error: Error: The process '/usr/bin/rpmbuild' failed with exit code 1
