configure: Check if AM_PROG_AR is defined.

It's not defined when using old versions of automake.
sysdb · May 31, 2014 · 761120d · 761120d
1 parent 0741548
commit 761120d
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/configure.ac b/configure.ac
@@ -48,7 +48,7 @@ AC_PROG_CPP
 AC_PROG_INSTALL
 AC_PROG_LN_S
 AC_PROG_MAKE_SET
-AM_PROG_AR
+m4_ifdef([AM_PROG_AR],[AM_PROG_AR],[])
 
 AM_PROG_CC_C_O
 AM_PROG_LEX