quadEM-R9-4 Fails to build with GCCversion 11.1.1 20210531

[michel4j]

drvTetrAMM.cpp fails to compile with the following error:

/usr/bin/g++  -D_GNU_SOURCE -D_DEFAULT_SOURCE          -D_X86_64_ -DUNIX  -Dlinux      -O3   -Wall      -mtune=generic     -m64 -fPIC -I. -I../O.Common -I. -I. -I.. -I../../../include/compiler/gcc -I../../../include/os/Linux -I../../../include      -I/home/michel/Applications/epics/synApps/support/quadEM-R9-4/include   -I/home/michel/Applications/epics/synApps/support/ipac-2-16/include         -I/home/michel/Applications/epics/synApps/support/asyn-R4-42/include  -I/home/michel/Applications/epics/synApps/support/areaDetector-R3-11/ADSupport/include/os/Linux -I/home/michel/Applications/epics/synApps/support/areaDetector-R3-11/ADSupport/include   -I/home/michel/Applications/epics/synApps/support/areaDetector-R3-11/ADCore/include  -I/home/michel/Applications/epics/synApps/support/autosave-R5-10-2/include/os/Linux -I/home/michel/Applications/epics/synApps/support/autosave-R5-10-2/include   -I/home/michel/Applications/epics/synApps/support/busy-R1-7-3/include   -I/home/michel/Applications/epics/synApps/support/calc-R3-7-4/include   -I/home/michel/Applications/epics/synApps/support/seq-2-2-9/include   -I/home/michel/Applications/epics/synApps/support/sscan-R2-11-4/include  -I/home/michel/Applications/epics/synApps/support/iocStats-3-1-16/include/os/Linux -I/home/michel/Applications/epics/synApps/support/iocStats-3-1-16/include -I/home/michel/Applications/epics/base-7.0.4.1/include/compiler/gcc -I/home/michel/Applications/epics/base-7.0.4.1/include/os/Linux -I/home/michel/Applications/epics/base-7.0.4.1/include        -c ../drvTetrAMM.cpp
../drvTetrAMM.cpp: In member function ‘void drvTetrAMM::readThread()’:
../drvTetrAMM.cpp:268:22: error: narrowing conversion of ‘18443366386873925631’ from ‘long long unsigned int’ to ‘long long int’ [-Wnarrowing]
  268 |                 case 0xfff40002ffffffffll:
      |                      ^~~~~~~~~~~~~~~~~~~~
../drvTetrAMM.cpp:273:22: error: narrowing conversion of ‘18443366378283991039’ from ‘long long unsigned int’ to ‘long long int’ [-Wnarrowing]
  273 |                 case 0xfff40000ffffffffll:
      |                      ^~~~~~~~~~~~~~~~~~~~
../drvTetrAMM.cpp:283:22: error: narrowing conversion of ‘18443366382578958335’ from ‘long long unsigned int’ to ‘long long int’ [-Wnarrowing]
  283 |                 case 0xfff40001ffffffffll:
      |                      ^~~~~~~~~~~~~~~~~~~~
../drvTetrAMM.cpp:296:22: error: narrowing conversion of ‘18443366391168892927’ from ‘long long unsigned int’ to ‘long long int’ [-Wnarrowing]
  296 |                 case 0xfff40003ffffffffll:
      |                      ^~~~~~~~~~~~~~~~~~~~
make[3]: *** [/home/michel/Applications/epics/base-7.0.4.1/configure/RULES_BUILD:249: drvTetrAMM.o] Error 1

This can be fixed by declaring lastValue as unsigned long long lastValue on line 193 instead of long long lastValue. Not sure what the impact of this change is elsewhere but it compiles without error after that.