From: Matthias Maier <tamiko@43-1.org>
Date: Mon, 13 Jun 2022 02:20:19 +0000 (-0500)
Subject: CMake: Use -Wno-pass-failed for clang
X-Git-Tag: v9.4.0-rc1~31^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F13963%2Fhead;p=dealii.git

CMake: Use -Wno-pass-failed for clang
---

diff --git a/cmake/setup_compiler_flags_gnu.cmake b/cmake/setup_compiler_flags_gnu.cmake
index df9df4f3ec..2a2315bac5 100644
--- a/cmake/setup_compiler_flags_gnu.cmake
+++ b/cmake/setup_compiler_flags_gnu.cmake
@@ -152,6 +152,19 @@ IF(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
         CMAKE_CXX_COMPILER_VERSION VERSION_LESS "6.3") )
     ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-Wno-unused-function")
   ENDIF()
+
+  #
+  # Clang-14.0.5 complaines loudly about not being able to vectorize some
+  # of our loops that we have annotated with DEAL_II_OPENMP_SIMD:
+  #
+  #     warning: loop not vectorized: the optimizer was unable to perform
+  #     the requested transformation; the transformation might be disabled
+  #     or specified as part of an unsupported transformation ordering
+  #     [-Wpass-failed=transform-warning]
+  #
+  # Let us simply disable the warning for now.
+  #
+  ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-Wno-pass-failed")
 ENDIF()