1 files changed, 13 insertions, 0 deletions
diff --git a/aclocal.m4 b/aclocal.m4
index 9f8add8..0df5c2f 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -102,3 +102,16 @@ else
 fi
 AC_SUBST($1)])
 
+# Define a conditional.
+
+AC_DEFUN(AM_CONDITIONAL,
+[AC_SUBST($1_TRUE)
+AC_SUBST($1_FALSE)
+if $2; then
+  $1_TRUE=
+  $1_FALSE='#'
+else
+  $1_TRUE='#'
+  $1_FALSE=
+fi])
+