From: Ben Hutchings <benh@debian.org>
Date: Sat, 13 May 2023 13:03:26 +0200
Subject: fixdep: Allow overriding HOSTCC and HOSTLD
Forwarded: not-needed

objtool always uses HOSTCC, HOSTLD, and HOSTAR, so we need to override
these on the command line for cross-builds of linux-kbuild.  But it
also builds fixdep which still needs to be native in a cross-build.
Add support for REALHOSTCC and REALHOSTLD variables which, if set,
override HOSTCC and HOSTLD for fixdep only.

---
--- a/tools/build/Makefile.include
+++ b/tools/build/Makefile.include
@@ -12,7 +12,10 @@ else
 endif
 
 fixdep:
-	$(SILENT_MAKE) -C $(srctree)/tools/build $(OUTPUT)fixdep
+	$(SILENT_MAKE) -C $(srctree)/tools/build \
+		$(if $(REALHOSTCC),HOSTCC=$(REALHOSTCC) KBUILD_HOSTCFLAGS=) \
+		$(if $(REALHOSTLD),HOSTLD=$(REALHOSTLD) KBUILD_HOSTLDFLAGS=) \
+		$(OUTPUT)fixdep
 
 fixdep-clean:
 	$(Q)$(MAKE) -C $(srctree)/tools/build clean