Experimental Physics and
Industrial Control System

From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Pierrick M Hanlet via Tech-talk <tech-talk at aps.anl.gov>
Sent: Friday, July 7, 2023 1:12 PM
To: tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Subject: External: changing compiler versions

Greetings all,
I'd like to build our EPICS software (starting on an Alma Linux 9 platform) for
C++17 or even C++20.  I'm presently building with C++11 by adding
-std=c++11 to the USR_CXXFLAGS in  configure/CONFIG_COMMON.  However,
when I tried c++20/c++17/c++14 and it failed in every case with:

• g++: error: unrecognized command line option ‘-std=c++20’

somewhere in the middle of building libcom - after the compilation call to
resourceLib.

A colleague of mine played with the configure/CONFIG.gnuCommon and
had a different level of success and failure.

Any help, even pointing me to the correct documentation would be
greatly appreciated.
Cheers,
Pierrick

-- 
Pierrick Hanlet
Fermi National Accelerator
Accelerator Front End Controls
+1-630-840-5555 -- lab
+1-312-687-4980 -- mobile

"Whether you think you can or think you can't, you're right" -- Henry Ford