Check for and use chsize instead of ftruncate if present.
diff --git a/include/config.h.in b/include/config.h.in
index 4f1b63e..12f6cd8 100644
--- a/include/config.h.in
+++ b/include/config.h.in
@@ -32,6 +32,9 @@
/* Define to use .string instead of .ascii */
#undef HAVE_ASM_STRING
+/* Define to 1 if you have the `chsize' function. */
+#undef HAVE_CHSIZE
+
/* Define to 1 if you have the `clone' function. */
#undef HAVE_CLONE
@@ -101,6 +104,9 @@
/* Define to 1 if you have the <freetype/tttables.h> header file. */
#undef HAVE_FREETYPE_TTTABLES_H
+/* Define to 1 if you have the `ftruncate' function. */
+#undef HAVE_FTRUNCATE
+
/* Define to 1 if you have the `ftruncate64' function. */
#undef HAVE_FTRUNCATE64
