Using newer gcc in /opt/netapps
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Gcc-5.2 is in /opt/netapps/gnu/gcc/5.2. In order for you to use it, this may have to be appended to your .profile:
GCCSNIPPET=/opt/netapps/gnu/gcc/5.2/sourceme
[ -r ${GCCSNIPPET} ] && . ${GCCSNIPPET}
Please note: /opt is *NOT* in ld.so.conf, and should not be
After sourcing the sourceme, you can call the newer g++ as
${CXX}
This is what Make commonly does, so projects using Makefiles will automatically use the newer compiler.
Later versions
You may find that still later versions are available. Check /opt/netapps/gnu/gcc, and alter the above script by adjusting the line
GCCBASE="/opt/netapps/gnu/gcc/5.2"