[PATCH] D75001: [OpenMP][cmake] ignore warning on unknown CUDA version

[Kelvin Li via Phabricator via cfe-commits]

kkwli0 created this revision.
kkwli0 added reviewers: tra, ABataev, JonChesterfield, jdoerfert, ye-luo.
Herald added subscribers: guansong, mgorny.

With CUDA 10.2 installed on the system, the compiler issues a warning about unknown CUDA version.  The warning message makes the `LIBOMP_HAVE_VERSION_SCRIPT_FLAG` test returns false.  As a result, building libomp fails.

  /opt/rh/devtoolset-8/root/usr/lib/gcc/ppc64le-redhat-linux/8/../../../../bin/ld: ../../../../lib/libomp.so: version node not found for symbol omp_get_num_places_@@VERSION
  /opt/rh/devtoolset-8/root/usr/lib/gcc/ppc64le-redhat-linux/8/../../../../bin/ld: failed to set dynamic section sizes: Bad value

This patch is to make the `libomp_check_linker_flag` function called in the `LIBOMP_HAVE_VERSION_SCRIPT_FLAG` test more tolerable with the warning message.


https://reviews.llvm.org/D75001

Files:
  openmp/runtime/cmake/LibompCheckLinkerFlag.cmake


Index: openmp/runtime/cmake/LibompCheckLinkerFlag.cmake
===================================================================
--- openmp/runtime/cmake/LibompCheckLinkerFlag.cmake
+++ openmp/runtime/cmake/LibompCheckLinkerFlag.cmake
@@ -38,7 +38,8 @@
 
   if(try_compile_result)
     foreach(regex IN LISTS failed_regexes)
-      if("${OUTPUT}" MATCHES ${regex})
+      # Ignore the warning about the newer or unknown CUDA version.
+      if(("${OUTPUT}" MATCHES ${regex}) AND NOT ("${OUTPUT}" MATCHES "Unknown CUDA version"))
         set(retval FALSE)
       endif()
     endforeach()


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