[openmp] Fix enumeration build issue for openmp library

integer value 40962 is outside the valid range of values [0, 31] for this enumeration type [-Wenum-constexpr-conversion]` (Issue #57022)

turn on -Wno-enum-constexpr-conversion to buy some time to fix the more egregious issue in hsa_agent_into_t and hsa_amd_agent_info_t interfaces.

relates to https://reviews.llvm.org/D131307/new/

Differential Revision: https://reviews.llvm.org/D131477

Author: ronlieb

openmp/cmake/HandleOpenMPOptions.cmake

@@ -25,6 +25,7 @@ append_if(OPENMP_HAVE_WIMPLICIT_FALLTHROUGH_FLAG "-Wimplicit-fallthrough" CMAKE_
 append_if(OPENMP_HAVE_WSIGN_COMPARE_FLAG "-Wsign-compare" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
 
 # Warnings that we want to disable because they are too verbose or fragile.
+append_if(OPENMP_HAVE_WNO_ENUM_CONSTEXPR_CONVERSION_FLAG "-Wno-enum-constexpr-conversion" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
 append_if(OPENMP_HAVE_WNO_EXTRA_FLAG "-Wno-extra" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
 append_if(OPENMP_HAVE_WNO_PEDANTIC_FLAG "-Wno-pedantic" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
 append_if(OPENMP_HAVE_WNO_MAYBE_UNINITIALIZED_FLAG "-Wno-maybe-uninitialized" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)

openmp/cmake/config-ix.cmake

@@ -26,6 +26,7 @@ check_cxx_compiler_flag(-Wimplicit-fallthrough OPENMP_HAVE_WIMPLICIT_FALLTHROUGH
 check_cxx_compiler_flag(-Wsign-compare OPENMP_HAVE_WSIGN_COMPARE_FLAG)
 
 # Warnings that we want to disable because they are too verbose or fragile.
+check_cxx_compiler_flag(-Wno-enum-constexpr-conversion OPENMP_HAVE_WNO_ENUM_CONSTEXPR_CONVERSION_FLAG)
 check_cxx_compiler_flag(-Wno-extra OPENMP_HAVE_WNO_EXTRA_FLAG)
 check_cxx_compiler_flag(-Wno-pedantic OPENMP_HAVE_WNO_PEDANTIC_FLAG)
 check_cxx_compiler_flag(-Wno-maybe-uninitialized OPENMP_HAVE_WNO_MAYBE_UNINITIALIZED_FLAG)