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-rw-r--r--arch/sandbox/cpu/Makefile6
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/sandbox/cpu/Makefile b/arch/sandbox/cpu/Makefile
index 404ff67..58c2537 100644
--- a/arch/sandbox/cpu/Makefile
+++ b/arch/sandbox/cpu/Makefile
@@ -10,5 +10,7 @@
obj-y := cpu.o os.o start.o state.o
# os.c is build in the system environment, so needs standard includes
-$(obj)os.o: ALL_CFLAGS := $(filter-out -nostdinc,$(ALL_CFLAGS))
-$(obj).depend.os: CPPFLAGS := $(filter-out -nostdinc,$(CPPFLAGS))
+$(obj)os.o: ALL_CFLAGS := $(BASE_CPPFLAGS) \
+ $(patsubst %, -idirafter %, $(BASE_INCLUDE_DIRS))
+$(obj).depend.os: CPPFLAGS := $(BASE_CPPFLAGS) \
+ $(patsubst %, -idirafter %, $(BASE_INCLUDE_DIRS))