From f7f3d8987ad501583031f0e1d5290370542cc1f3 Mon Sep 17 00:00:00 2001
From: Eisuke Kawashima <15070-e-kwsm@users.noreply.gitlab.com>
Date: Tue, 10 Nov 2020 12:05:29 +0900
Subject: FindBLAS: Add dependency of OpenBLAS on OpenMP for BLA_STATIC

Fixes: #16221
---
 Modules/FindBLAS.cmake | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Modules/FindBLAS.cmake b/Modules/FindBLAS.cmake
index e4353df..715049b 100644
--- a/Modules/FindBLAS.cmake
+++ b/Modules/FindBLAS.cmake
@@ -586,16 +586,22 @@ if(BLA_VENDOR STREQUAL "OpenBLAS" OR BLA_VENDOR STREQUAL "All")
     else()
       find_package(Threads REQUIRED)
     endif()
+    set(_threadlibs "${CMAKE_THREAD_LIBS_INIT}")
+    if(BLA_STATIC)
+      find_package(OpenMP COMPONENTS C)
+      list(PREPEND _threadlibs "${OpenMP_C_LIBRARIES}")
+    endif()
     check_blas_libraries(
       BLAS_LIBRARIES
       BLAS
       sgemm
       ""
       "openblas"
-      "${CMAKE_THREAD_LIBS_INIT}"
+      "${_threadlibs}"
       ""
       ""
       )
+    unset(_threadlibs)
   endif()
 endif()
 
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