https://bugs.gentoo.org/726200
--- a/build/aclocal.float.m4
+++ b/build/aclocal.float.m4
@@ -31,10 +31,13 @@ int main() { return 0; }
 
 ]])], [
 
-if strings -a conftest$ac_exeext | grep noonsees >/dev/null ; then
+# allow users to override default 'strings' with 'llvm-strings'
+# or ${CHOST}-strings.
+AC_CHECK_TOOL(STRINGS, strings)
+if $STRINGS -a conftest$ac_exeext | grep noonsees >/dev/null ; then
   ax_cv_c_float_words_bigendian=yes
 fi
-if strings -a conftest$ac_exeext | grep seesnoon >/dev/null ; then
+if $STRINGS -a conftest$ac_exeext | grep seesnoon >/dev/null ; then
   if test "$ax_cv_c_float_words_bigendian" = unknown; then
     ax_cv_c_float_words_bigendian=no
   else