[PATCH] config-daemon.ac: detect host AR

[Sergei Trofimovich <slyfox@inbox.ru>]

The problem is seen when we try to use explicit host:

    ./configure --prefix=/usr --localstatedir=/var/lib --host=x86_64-pc-linux-gnu
    make V=1

Before the change:
    ar cru libstore.a nix/libstore/libstore_a-gc.o
After the change:
    x86_64-pc-linux-gnu-ar cru libstore.a

* config-daemon.ac: use AM_PROG_AR to detect host AR

Signed-off-by: Sergei Trofimovich <slyfox@inbox.ru>
---
 config-daemon.ac | 1 +
 1 file changed, 1 insertion(+)

diff --git a/config-daemon.ac b/config-daemon.ac
index 056c939e3..42b59819d 100644
--- a/config-daemon.ac
+++ b/config-daemon.ac
@@ -5,6 +5,7 @@ AC_MSG_RESULT([$guix_build_daemon])
 
 dnl C++ environment.  This macro must be used unconditionnaly.
 AC_PROG_CXX
+AM_PROG_AR
 AC_LANG([C++])
 
 if test "x$guix_build_daemon" = "xyes"; then
-- 
2.11.1