--- roms/u-boot/tools/mkimage.c.orig	2021-06-20 14:24:31 UTC
+++ roms/u-boot/tools/mkimage.c
@@ -577,6 +577,7 @@ int main(int argc, char **argv)
 #if defined(_POSIX_SYNCHRONIZED_IO) && \
    !defined(__sun__) && \
    !defined(__FreeBSD__) && \
+   !defined(__DragonFly__) && \
    !defined(__OpenBSD__) && \
    !defined(__APPLE__)
 	(void) fdatasync (ifd);
@@ -622,6 +623,7 @@ int main(int argc, char **argv)
 #if defined(_POSIX_SYNCHRONIZED_IO) && \
    !defined(__sun__) && \
    !defined(__FreeBSD__) && \
+   !defined(__DragonFly__) && \
    !defined(__OpenBSD__) && \
    !defined(__APPLE__)
 	(void) fdatasync (ifd);