Index: cmake/GenerateConfigurationFile.cmake
--- cmake/GenerateConfigurationFile.cmake.orig
+++ cmake/GenerateConfigurationFile.cmake
@@ -70,6 +70,9 @@ check_struct_has_member("struct statfs" f_fstypename s
 include(CheckCXXSourceCompiles)
 check_cxx_source_compiles(
   [=[
+    #ifdef __i386__
+    #error XXX knock this out to avoid hitting SIGILL at runtime
+    #endif
     #include <immintrin.h>
     #ifndef _MSC_VER
     __attribute__((target("avx2")))
