--- src/VBox/Devices/PC/ipxe/Makefile.kmk.orig	2024-01-11 12:19:38 UTC
+++ src/VBox/Devices/PC/ipxe/Makefile.kmk
@@ -35,7 +35,7 @@ iPxeBiosBin_CLEAN    = \
 iPxeBiosBin_CLEAN    = \
 	$(iPxeBiosBin_0_OUTDIR)/iPxeBiosBin.c \
 
-if1of ($(KBUILD_TARGET), darwin os2 solaris win)
+if1of ($(KBUILD_TARGET), darwin freebsd os2 solaris win)
  $$(iPxeBiosBin_0_OUTDIR)/iPxeBiosBin.c: $(PATH_SUB_CURRENT)/iPxeBiosBin.rom $(VBOX_BIN2C) | $$(dir $$@)
 	$(call MSG_TOOL,bin2c,iPxeBiosBin,$<,$@)
 	$(QUIET)$(VBOX_BIN2C) -min 32 -max 56 -mask 0x1ff -export NetBiosBinary $< $@
@@ -121,7 +121,7 @@ endif
 	-falign-loops=1 \
 	-Os \
 	-falign-functions=1 \
-	-mpreferred-stack-boundary=2 \
+	-mstack-alignment=2 \
 	-mregparm=3 \
 	-mrtd \
 	-freg-struct-return \
@@ -144,7 +144,7 @@ endif
 	-falign-jumps=1 \
 	-falign-loops=1 \
 	-falign-functions=1 \
-	-mpreferred-stack-boundary=2 \
+	-mstack-alignment=2 \
 	-mregparm=3 \
 	-mrtd \
 	-freg-struct-return \