regex: also remove dependency on HAVE_WCSCOLL

[gnulib.git] / lib / isapipe.h

diff --git a/lib/isapipe.h b/lib/isapipe.h
index 187527a..c108e30 100644 (file)
--- a/lib/isapipe.h
+++ b/lib/isapipe.h
@@ -1 +1,6 @@
-int isapipe (int);
+/* Whether pipes are FIFOs; -1 if not known.  */
+#ifndef HAVE_FIFO_PIPES
+# define HAVE_FIFO_PIPES (-1)
+#endif
+
+int isapipe (int fd);