[PATCH] libtool: fix ABI detection for freebsd-amd64.

Fixes _LT_ENABLE_LOCK.
Untested.

BugLink: https://github.com/libffi/libffi/pull/79
---
 m4/libtool.m4 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/m4/libtool.m4 b/m4/libtool.m4
index ee292aff5bca..d97f20f1ba0b 100644
--- a/m4/libtool.m4
+++ b/m4/libtool.m4
@@ -1369,7 +1369,7 @@ mips64*-*linux*)
   rm -rf conftest*
   ;;
 
-x86_64-*kfreebsd*-gnu|x86_64-*linux*|powerpc*-*linux*| \
+amd64-*-freebsd*|x86_64-*kfreebsd*-gnu|x86_64-*linux*|powerpc*-*linux*| \
 s390*-*linux*|s390*-*tpf*|sparc*-*linux*)
   # Find out what ABI is being produced by ac_compile, and set linker
   # options accordingly.  Note that the listed cases only cover the
-- 
2.9.2