From: Matthias Maier <tamiko@43-1.org>
Date: Mon, 13 Jun 2022 18:13:29 +0000 (-0500)
Subject: CMake: use full compiler/linker flags for trilinos sanity checks
X-Git-Tag: v9.4.0-rc1~23^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F13969%2Fhead;p=dealii.git

CMake: use full compiler/linker flags for trilinos sanity checks
---

diff --git a/cmake/configure/configure_20_trilinos.cmake b/cmake/configure/configure_20_trilinos.cmake
index 8a9a4a0796..fb391179c5 100644
--- a/cmake/configure/configure_20_trilinos.cmake
+++ b/cmake/configure/configure_20_trilinos.cmake
@@ -220,9 +220,13 @@ MACRO(FEATURE_TRILINOS_FIND_EXTERNAL var)
       LIST(APPEND CMAKE_REQUIRED_INCLUDES ${Trilinos_INCLUDE_DIRS})
       LIST(APPEND CMAKE_REQUIRED_INCLUDES ${MPI_CXX_INCLUDE_PATH})
 
-
       LIST(APPEND CMAKE_REQUIRED_LIBRARIES ${Trilinos_LIBRARIES} ${MPI_LIBRARIES})
 
+      # For the case of Trilinos being compiled with openmp support the
+      # following Tpetra test needs -fopenmp to succeed. Make sure that we
+      # supply the correct compiler and linker flags:
+      ADD_FLAGS(CMAKE_REQUIRED_FLAGS "${DEAL_II_CXX_FLAGS} ${DEAL_II_LINKER_FLAGS}")
+
       CHECK_CXX_SOURCE_COMPILES(
         "
         #include <Tpetra_Vector.hpp>