Problems with clang under MacOS

[Torsten Bögershausen via Tech-talk <tech-talk at aps.anl.gov>]

Hej Experts,
after problems with C++ code I needed to re-install the
xcode command line tools here.

However, trying to compile a motor driver didn't work very well:


c++              -DUNIX  -Ddarwin      -O3 -g   -Wall       -arch x86_64 
   -fno-common  -fPIC -I. -I../O.Common -I. -I. -I.. 
-I.../epics/MCAG_setupMotionDemo.smaract/epics/modules/motor/include/compiler/clang 
-I.../epics/MCAG_setupMotionDemo.smaract/epics/modules/motor/include/os/Darwin 
-I.../epics/MCAG_setupMotionDemo.smaract/epics/modules/motor/include 
-I.../epics/MCAG_setupMotionDemo.smaract/epics/modules/motor/include 
-I.../epics/MCAG_setupMotionDemo.smaract/epics/base/../modules/asyn/include 
-I.../epics/MCAG_setupMotionDemo.smaract/epics/base/include/compiler/clang 
-I.../epics/MCAG_setupMotionDemo.smaract/epics/base/include/os/Darwin 
-I.../epics/MCAG_setupMotionDemo.smaract/epics/base/include           -c 
../smarActMCS2MotorDriver.cpp
../smarActMCS2MotorDriver.cpp:147:10: error: integer value 8 is outside 
the valid range of
      values [0, 7] for the enumeration type 'asynStatus' 
[-Wenum-constexpr-conversion]
  147 |     case asynParamWrongType:
      |          ^
.../epics/MCAG_setupMotionDemo.smaract/epics/base/../modules/asyn/include/paramErrors.h:16:32: 
note:
      expanded from macro 'asynParamWrongType'
   16 | #define asynParamWrongType     (asynStatus)(asynDisabled + 3)
      |                                ^
../smarActMCS2MotorDriver.cpp:149:10: error: integer value 9 is outside 
the valid range of
      values [0, 7] for the enumeration type 'asynStatus' 
[-Wenum-constexpr-conversion]
  149 |     case asynParamBadIndex:
      |          ^
.../epics/MCAG_setupMotionDemo.smaract/epics/base/../modules/asyn/include/paramErrors.h:17:32: 
note:
      expanded from macro 'asynParamBadIndex'
   17 | #define asynParamBadIndex      (asynStatus)(asynDisabled + 4)
      |                                ^
../smarActMCS2MotorDriver.cpp:151:10: error: integer value 10 is outside 
the valid range of
      values [0, 7] for the enumeration type 'asynStatus' 
[-Wenum-constexpr-conversion]
  151 |     case asynParamUndefined:
      |          ^
.../epics/MCAG_setupMotionDemo.smaract/epics/base/../modules/asyn/include/paramErrors.h:18:32: 
note:
      expanded from macro 'asynParamUndefined'
   18 | #define asynParamUndefined     (asynStatus)(asynDisabled + 5)
      |                                ^
3 errors generated.

with
=========================
 c++ --version
Apple clang version 17.0.0 (clang-1700.6.3.2)
Target: x86_64-apple-darwin24.6.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin

A hot-fix for this was to add this line
OP_SYS_CPPFLAGS += -Wno-error=enum-constexpr-conversion
into
epics/base/configure/os/CONFIG.darwinCommon.darwinCommon

... which turns the error into a warning.

Are there any better suggestions ?