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-rw-r--r--tools/build/Build2
-rw-r--r--tools/build/Makefile23
2 files changed, 23 insertions, 2 deletions
diff --git a/tools/build/Build b/tools/build/Build
new file mode 100644
index 000000000000..1c7e598e9f59
--- /dev/null
+++ b/tools/build/Build
@@ -0,0 +1,2 @@
+hostprogs := fixdep
+fixdep-y := fixdep.o
diff --git a/tools/build/Makefile b/tools/build/Makefile
index 63ef21878761..a5b3c29b8d70 100644
--- a/tools/build/Makefile
+++ b/tools/build/Makefile
@@ -37,5 +37,24 @@ ifneq ($(wildcard $(TMP_O)),)
$(Q)$(MAKE) -C feature OUTPUT=$(TMP_O) clean >/dev/null
endif
-$(OUTPUT)fixdep: $(srctree)/tools/build/fixdep.c
- $(QUIET_CC)$(HOSTCC) $(KBUILD_HOSTCFLAGS) $(KBUILD_HOSTLDFLAGS) -o $@ $<
+include $(srctree)/tools/build/Makefile.include
+
+FIXDEP := $(OUTPUT)fixdep
+FIXDEP_IN := $(OUTPUT)fixdep-in.o
+
+# To track fixdep's dependencies properly, fixdep needs to run on itself.
+# Build it twice the first time.
+$(FIXDEP_IN): FORCE
+ $(Q)if [ ! -f $(FIXDEP) ]; then \
+ $(MAKE) $(build)=fixdep HOSTCFLAGS="$(KBUILD_HOSTCFLAGS)"; \
+ rm -f $(FIXDEP).o; \
+ fi
+ $(Q)$(MAKE) $(build)=fixdep HOSTCFLAGS="$(KBUILD_HOSTCFLAGS)"
+
+
+$(FIXDEP): $(FIXDEP_IN)
+ $(QUIET_LINK)$(HOSTCC) $(FIXDEP_IN) $(KBUILD_HOSTLDFLAGS) -o $@
+
+FORCE:
+
+.PHONY: FORCE