fdt: Ensure that libfdt_env.h comes from U-Boot
When building host utilities, we include libfdt.h from the host, not from
U-Boot. This in turn brings in libfdt_env.h from the host, which can mess
up the types and cause a build failure, depending on the host environment.
To fix this, force inclusion of U-Boot's libfdt_env.h so that the types
are correct.
Another way to fix this is to use -nostdinc and -idirafter to ensure that
system includes are included after U-Boot ones. Unfortunately this means
that U-Boot's errno.h gets included instead of the system one. This in
turn requires a hack to errno.h to redirect things, so all in all the
solution in this patch is probably cleaner.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/Makefile b/tools/Makefile
index c5952fc..889c897 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -164,7 +164,8 @@
# Use native tools and options
# Define __KERNEL_STRICT_NAMES to prevent typedef overlaps
#
-HOSTCPPFLAGS = -idirafter $(SRCTREE)/include \
+HOSTCPPFLAGS = -include $(SRCTREE)/include/libfdt_env.h \
+ -idirafter $(SRCTREE)/include \
-idirafter $(OBJTREE)/include2 \
-idirafter $(OBJTREE)/include \
-I $(SRCTREE)/lib/libfdt \