--- roms/u-boot-sam460ex/tools/mkimage.c.orig	2021-06-20 14:20:25 UTC
+++ roms/u-boot-sam460ex/tools/mkimage.c
@@ -429,6 +429,7 @@ NXTARG:		;
 #if defined(_POSIX_SYNCHRONIZED_IO) && \
    !defined(__sun__) && \
    !defined(__FreeBSD__) && \
+   !defined(__DragonFly__) && \
    !defined(__APPLE__)
 	(void) fdatasync (ifd);
 #else
@@ -472,6 +473,7 @@ NXTARG:		;
 #if defined(_POSIX_SYNCHRONIZED_IO) && \
    !defined(__sun__) && \
    !defined(__FreeBSD__) && \
+   !defined(__DragonFly__) && \
    !defined(__APPLE__)
 	(void) fdatasync (ifd);
 #else