Index: patches/patch-CMakeLists_txt
===================================================================
RCS file: patches/patch-CMakeLists_txt
diff -N patches/patch-CMakeLists_txt
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ patches/patch-CMakeLists_txt	5 Oct 2021 13:54:22 -0000
@@ -0,0 +1,16 @@
+$OpenBSD$
+
+Index: CMakeLists.txt
+--- CMakeLists.txt.orig
++++ CMakeLists.txt
+@@ -459,7 +459,9 @@ if (CLANG)
+     set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O3 -g -DNDEBUG")
+     set(CMAKE_C_FLAGS_RELWITHDEBINFO  "-O3 -g -DNDEBUG")
+ 
+-    set(SIMD_COMPILER_FLAGS "-msse2 -mfpmath=sse -ftree-vectorize -ftree-slp-vectorize")
++    if (X86 OR X86_64)
++        set(SIMD_COMPILER_FLAGS "-msse2 -mfpmath=sse -ftree-vectorize -ftree-slp-vectorize")
++    endif()
+ endif()
+ 
+ if (ENABLE_OPENMP)