configure: avoid warning with automake 1.12 on Cygwin

With automake 1.12 came a new macro, AM_PROG_AR, which *must* be used if
the archiver (eg. ar on GNU systems) is used, to support exotic archivers
such as the one from Microsoft (lib).

Unfortunately, this macro causes issues on older automake versions, and
thus needs to be conditionalised (if that wasn't a word, it now is ;-) )

Furthermore, this macro *must* be called before we initialise libtool
(with LT_INIT).

Sigh... :-/

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

diff --git a/configure.ac b/configure.ac
index ed223932d1a98d0f0bba7d6cb3fd2604b95ce918..473755d820869dd821b67c1bc9c0a9945db2718f 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -43,6 +43,7 @@ AC_SUBST([SILENT_MAKEFLAGS])
 
 #----------------------------------------
 # Prepare libtool
+m4_ifdef([AM_PROG_AR], [AM_PROG_AR]) dnl Automake, we have a problem...
 LT_PREREQ([2.2.6])
 LT_INIT([disable-static])