message: SCALAR target breaks some builds, make it optional and default to 'OFF'
diff: @@ -62,10 +62,17 @@ ENDMACRO()
  MACRO(OSPRAY_CONFIGURE_ISPC_ISA)
  SET(OSPRAY_BUILD_ISA "ALL" CACHE STRING
  - "Target ISA (SCALAR, SSE4, AVX, AVX2, AVX512KNL, AVX512SKX, or ALL)")
  + "Target ISA (SSE4, AVX, AVX2, AVX512KNL, AVX512SKX, or ALL)")
  STRING(TOUPPER ${OSPRAY_BUILD_ISA} OSPRAY_BUILD_ISA)
  + OPTION(OSPRAY_BUILD_ISA_SCALAR
  + "Include 'SCALAR' target (WARNING: may not work!)" OFF)
  + MARK_AS_ADVANCED(OSPRAY_BUILD_ISA_SCALAR)
  +
  + IF (OSPRAY_BUILD_ISA_SCALAR)
  SET(OSPRAY_SUPPORTED_ISAS SCALAR)
  + ENDIF()
  +
  IF(EMBREE_ISA_SUPPORTS_SSE4)
  SET(OSPRAY_SUPPORTED_ISAS ${OSPRAY_SUPPORTED_ISAS} SSE4)
  ENDIF()
  