Add comments explaining include paths
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/tests/Makefile b/tests/Makefile
index 80c84fa..ffa4812 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -6,6 +6,9 @@
WARNING_CFLAGS ?= -Wall -Wextra
LDFLAGS ?=
+# Include public header files from ../include, test-specific header files
+# from ./include, and private header files (used by some invasive tests)
+# from ../library.
LOCAL_CFLAGS = $(WARNING_CFLAGS) -I./include -I../include -I../library -D_FILE_OFFSET_BITS=64
LOCAL_LDFLAGS = -L../library \
-lmbedtls$(SHARED_SUFFIX) \