Use parent module includes when used as a submodule
For Makefiles, enable overriding where includes can come from in order to
enable the parent module to set the include path. This allows the parent
module to specify that its config.h should be used, even when the submodule
when built standalone would use a different config.h.
For CMake, always look in the parent's include folder and our own. List the
parent's include folder first, so that preference is given to parent
include files.
diff --git a/library/Makefile b/library/Makefile
index 83afa66..5814ae8 100644
--- a/library/Makefile
+++ b/library/Makefile
@@ -5,7 +5,8 @@
WARNING_CFLAGS ?= -Wall -W -Wdeclaration-after-statement
LDFLAGS ?=
-LOCAL_CFLAGS = $(WARNING_CFLAGS) -I../include -D_FILE_OFFSET_BITS=64
+CRYPTO_INCLUDES ?= -I../include
+LOCAL_CFLAGS = $(WARNING_CFLAGS) $(CRYPTO_INCLUDES) -D_FILE_OFFSET_BITS=64
LOCAL_LDFLAGS =
ifdef DEBUG