HPCC-13496 Suppress compilation errors on new version of clang

Some of these need revisiting to fix properly, but that will have to be done
in 6.0 - see HPCC-13522.

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>

cmake_modules/commonSetup.cmake

@@ -211,7 +211,7 @@ IF ("${COMMONSETUP_DONE}" STREQUAL "")
     set ( LIBRARY_OUTPUT_PATH "${CMAKE_BINARY_DIR}/${CMAKE_BUILD_TYPE}/libs" )
 
     if (CMAKE_COMPILER_IS_GNUCXX OR CMAKE_COMPILER_IS_CLANGXX)
-      message ("${CMAKE_CXX_COMPILER_ID}")
+      message ("Using compiler: ${CMAKE_CXX_COMPILER_ID} ${CMAKE_CXX_COMPILER_VERSION}")
       SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -frtti -fPIC -fmessage-length=0 -Wformat -Wformat-security -Wformat-nonliteral -pthread -Wuninitialized")
       SET (CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -rdynamic")
       SET (CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -g -fno-inline-functions")
@@ -249,6 +249,9 @@ IF ("${COMMONSETUP_DONE}" STREQUAL "")
       SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror=logical-op-parentheses -Werror=bool-conversions -Werror=return-type -Werror=comment")
       SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}  -Werror=bitwise-op-parentheses -Werror=tautological-compare")
       SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}  -Wno-switch-enum -Wno-format-zero-length -Wno-switch")
+      if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 4.2.1 OR CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 4.2.1)
+        SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-undefined-bool-conversion -Wno-pointer-bool-conversion -Wno-tautological-compare")
+      endif()
     endif()
     # All of these are defined in platform.h too, but need to be defned before any system header is included
     ADD_DEFINITIONS (-D_LARGEFILE_SOURCE=1 -D_LARGEFILE64_SOURCE=1 -D_FILE_OFFSET_BITS=64 -D__USE_LARGEFILE64=1 -D__USE_FILE_OFFSET64=1)