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-rw-r--r--winsup/mingw/include/unistd.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/winsup/mingw/include/unistd.h b/winsup/mingw/include/unistd.h
index 37682e579..f3a54495e 100644
--- a/winsup/mingw/include/unistd.h
+++ b/winsup/mingw/include/unistd.h
@@ -14,4 +14,20 @@
#include <getopt.h>
#undef __UNISTD_GETOPT__
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* This is defined as a real library function to allow autoconf
+ to verify its existence. */
+int ftruncate(int, off_t);
+__CRT_INLINE int ftruncate(int __fd, off_t __length)
+{
+ return _chsize (__fd, __length);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
#endif /* _UNISTD_H */