tools build: Provide consistent build options for fixdep

The fixdep binary is being compiled and linked in one step. While the
host linker flags are passed to the compiler the host compiler flags are
missed.

That leads to build errors at least on x86_64, arm64 and s390 as result
of the compiler vs linker flags inconsistency. For example, during RPM
package build redhat-hardened-ld script is provided to gcc, while
redhat-hardened-cc1 script is missed.

Provide both KBUILD_HOSTCFLAGS and KBUILD_HOSTLDFLAGS to avoid that.

Fixes: ea974028a049f2ce ("tools build: Avoid circular .fixdep-in.o.cmd issues")
Closes: https://lore.kernel.org/lkml/99ae0d34-ed76-4ca0-a9fd-c337da33c9f9@leemhuis.info/
Reported-by: Thorsten Leemhuis <linux@leemhuis.info>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Tested-by: Thorsten Leemhuis <linux@leemhuis.info>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20240815072046.1002837-1-agordeev@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/build/Makefile b/tools/build/Makefile
index fea3cf647f5bfe037cc17b79323ba0e6986249a0..18ad131f6ea74aebfc3fd6aa6dddfdc00634b66c 100644 (file)
--- a/tools/build/Makefile
+++ b/tools/build/Makefile
@@ -44,4 +44,4 @@ ifneq ($(wildcard $(TMP_O)),)
 endif
 
 $(OUTPUT)fixdep: $(srctree)/tools/build/fixdep.c
-       $(QUIET_CC)$(HOSTCC) $(KBUILD_HOSTLDFLAGS) -o $@ $<
+       $(QUIET_CC)$(HOSTCC) $(KBUILD_HOSTCFLAGS) $(KBUILD_HOSTLDFLAGS) -o $@ $<