--- m4/float_h.m4.orig	2020-06-03 23:04:44.000000000 +1000
+++ m4/float_h.m4	2020-07-31 00:02:22.044386000 +1000
@@ -14,7 +14,7 @@
     aix* | beos* | openbsd* | mirbsd* | irix*)
       FLOAT_H=float.h
       ;;
-    freebsd* | dragonfly*)
+    bsdsunix* | freebsd* | dragonfly*)
       case "$host_cpu" in
 changequote(,)dnl
         i[34567]86 )
@@ -46,7 +46,7 @@
       ;;
   esac
   case "$host_os" in
-    aix* | freebsd* | dragonfly* | linux*)
+    aix* | bsdsunix* | freebsd* | dragonfly* | linux*)
       if test -n "$FLOAT_H"; then
         REPLACE_FLOAT_LDBL=1
       fi