kc3-lang/libffi

diff --git a/m4/libtool.m4 b/m4/libtool.m4
index 56666f0..540e0b4 100644
--- a/m4/libtool.m4
+++ b/m4/libtool.m4
@@ -1324,7 +1324,14 @@ s390*-*linux*|s390*-*tpf*|sparc*-*linux*)
 	    LD="${LD-ld} -m elf_i386_fbsd"
 	    ;;
 	  x86_64-*linux*)
-	    LD="${LD-ld} -m elf_i386"
+	    case `/usr/bin/file conftest.o` in
+	      *x86-64*)
+	         LD="${LD-ld} -m elf32_x86_64"
+	         ;;
+	      *)
+	         LD="${LD-ld} -m elf_i386"
+	         ;;
+	    esac
 	    ;;
 	  ppc64-*linux*|powerpc64-*linux*)
 	    LD="${LD-ld} -m elf32ppclinux"