[kvm-unit-tests GIT PULL 04/14] s390x/Makefile: refactor CPPFLAGS

[Nico Boehr <nrb@linux.ibm.com>]

From: Marc Hartmayer <mhartmay@linux.ibm.com>

This change makes it easier to reuse them. While at it, add a comment
why the `lib` include path is required.

Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Link: https://lore.kernel.org/r/20230331082709.35955-1-mhartmay@linux.ibm.com
[ nrb: remove trailing space after INCLUDE_PATHS ]
Signed-off-by: Nico Boehr <nrb@linux.ibm.com>
Reviewed-by: Nico Boehr <nrb@linux.ibm.com>
Tested-by: Nico Boehr <nrb@linux.ibm.com>
---
 s390x/Makefile | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/s390x/Makefile b/s390x/Makefile
index 71e6563..50171f3 100644
--- a/s390x/Makefile
+++ b/s390x/Makefile
@@ -63,9 +63,14 @@ test_cases: $(tests)
 test_cases_binary: $(tests_binary)
 test_cases_pv: $(tests_pv_binary)
 
+INCLUDE_PATHS = $(SRCDIR)/lib $(SRCDIR)/lib/s390x
+# Include generated header files (e.g. in case of out-of-source builds)
+INCLUDE_PATHS += lib
+CPPFLAGS = $(addprefix -I,$(INCLUDE_PATHS))
+
 CFLAGS += -std=gnu99
 CFLAGS += -ffreestanding
-CFLAGS += -I $(SRCDIR)/lib -I $(SRCDIR)/lib/s390x -I lib
+CFLAGS += $(CPPFLAGS)
 CFLAGS += -O2
 CFLAGS += -march=zEC12
 CFLAGS += -mbackchain
-- 
2.39.2