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-rw-r--r--scripts/dtc/Makefile34
1 files changed, 15 insertions, 19 deletions
diff --git a/scripts/dtc/Makefile b/scripts/dtc/Makefile
index 2a48022c41e7..b47f4daa4515 100644
--- a/scripts/dtc/Makefile
+++ b/scripts/dtc/Makefile
@@ -1,31 +1,27 @@
+# SPDX-License-Identifier: GPL-2.0
# scripts/dtc makefile
-hostprogs-y := dtc
-always := $(hostprogs-y)
+# *** Also keep .gitignore in sync when changing ***
+hostprogs-always-$(CONFIG_DTC) += dtc fdtoverlay
+hostprogs-always-$(CHECK_DTBS) += dtc
dtc-objs := dtc.o flattree.o fstree.o data.o livetree.o treesource.o \
srcpos.o checks.o util.o
dtc-objs += dtc-lexer.lex.o dtc-parser.tab.o
-# Source files need to get at the userspace version of libfdt_env.h to compile
-
-HOSTCFLAGS_DTC := -I$(src) -I$(src)/libfdt
+# The upstream project builds libfdt as a separate library. We are choosing to
+# instead directly link the libfdt object files into fdtoverlay.
+libfdt-objs := fdt.o fdt_ro.o fdt_wip.o fdt_sw.o fdt_rw.o fdt_strerror.o fdt_empty_tree.o fdt_addresses.o fdt_overlay.o
+libfdt = $(addprefix libfdt/,$(libfdt-objs))
+fdtoverlay-objs := $(libfdt) fdtoverlay.o util.o
-HOSTCFLAGS_checks.o := $(HOSTCFLAGS_DTC)
-HOSTCFLAGS_data.o := $(HOSTCFLAGS_DTC)
-HOSTCFLAGS_dtc.o := $(HOSTCFLAGS_DTC)
-HOSTCFLAGS_flattree.o := $(HOSTCFLAGS_DTC)
-HOSTCFLAGS_fstree.o := $(HOSTCFLAGS_DTC)
-HOSTCFLAGS_livetree.o := $(HOSTCFLAGS_DTC)
-HOSTCFLAGS_srcpos.o := $(HOSTCFLAGS_DTC)
-HOSTCFLAGS_treesource.o := $(HOSTCFLAGS_DTC)
-HOSTCFLAGS_util.o := $(HOSTCFLAGS_DTC)
+# Source files need to get at the userspace version of libfdt_env.h to compile
+HOST_EXTRACFLAGS += -I $(src)/libfdt
+HOST_EXTRACFLAGS += -DNO_YAML
-HOSTCFLAGS_dtc-lexer.lex.o := $(HOSTCFLAGS_DTC)
-HOSTCFLAGS_dtc-parser.tab.o := $(HOSTCFLAGS_DTC)
+# Generated files need one more search path to include headers in source tree
+HOSTCFLAGS_dtc-lexer.lex.o := -I $(src)
+HOSTCFLAGS_dtc-parser.tab.o := -I $(src)
# dependencies on generated files need to be listed explicitly
$(obj)/dtc-lexer.lex.o: $(obj)/dtc-parser.tab.h
-
-# generated files need to be cleaned explicitly
-clean-files := dtc-lexer.lex.c dtc-parser.tab.c dtc-parser.tab.h