improved cross compilation detection (#252)

diff --git a/configure.ac b/configure.ac
index fbdd17d834d20fbc418b40244e5a8972e594e157..9e7338cfce2516bcc24d04be8d49255f8094a4f1 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -264,7 +264,7 @@ if test x"$enable_simd" != x"no"; then
     # For x86-64 SIMD, g++ >=5 or clang++ >=7 is required
     if test x"$host_cpu" = x"x86_64" || test x"$host_cpu" = x"amd64"; then
        AC_LANG(C++)
-       if test x"$host_cpu" = x"$build_cpu"; then
+       if test x"$host" = x"$build"; then
            AC_RUN_IFELSE([AC_LANG_PROGRAM([SIMD_X86_64_TEST],[[if (test_ssse3(42) != 42 || test_sse2(42) != 42 || test_avx2(42) != 42) exit(1);]])],
                [CXX_OK=yes],[CXX_OK=no])
        else