From b7544155f79aa293fa6dc5a45d29101ae017f461 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Toke=20H=C3=B8iland-J=C3=B8rgensen?= <toke@toke.dk>
Date: Tue, 6 Oct 2020 15:59:44 +0200
Subject: [PATCH] Add lib/Makefile
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk>
---
 Makefile     |  2 +-
 lib/Makefile | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 49 insertions(+), 1 deletion(-)
 create mode 100644 lib/Makefile

diff --git a/Makefile b/Makefile
index fe17f39..2f7c25b 100644
--- a/Makefile
+++ b/Makefile
@@ -16,7 +16,7 @@ endif
 SUBDIRS := encap-forward
 .PHONY: check_submodule help clobber distclean clean $(SUBDIRS)
 
-all: $(SUBDIRS)
+all: lib $(SUBDIRS)
 
 lib: config.mk check_submodule
 	@echo; echo $@; $(MAKE) -C $@
diff --git a/lib/Makefile b/lib/Makefile
new file mode 100644
index 0000000..19fe565
--- /dev/null
+++ b/lib/Makefile
@@ -0,0 +1,48 @@
+
+LIBBPF_CFLAGS:=$(if $(CFLAGS),$(CFLAGS),-g -O2 -Werror -Wall) -fPIC
+
+LIB_DIR = .
+include defines.mk
+
+SUBDIRS=
+
+all: $(OBJECT_LIBBPF)
+	@set -e; \
+	for i in $(SUBDIRS); \
+	do echo; echo "  $$i"; $(MAKE) -C $$i; done
+
+.PHONY: clean
+clean: libbpf_clean
+	@for i in $(SUBDIRS); \
+	do $(MAKE) -C $$i clean; done
+
+install:
+	install -m 0755 -d $(DESTDIR)$(HDRDIR)
+	$(MAKE) -C libxdp install
+	$(MAKE) -C testing install
+
+libbpf: $(OBJECT_LIBBPF)
+
+# Handle libbpf as git submodule
+ifeq ($(SYSTEM_LIBBPF),n)
+ifeq ($(VERBOSE),0)
+P:= >/dev/null
+endif
+
+# Detect submodule libbpf source file changes
+LIBBPF_SOURCES := $(wildcard libbpf/src/*.[ch])
+
+.PHONY: libbpf_clean
+libbpf/src/libbpf.a: $(LIBBPF_SOURCES)
+	@echo ; echo "  libbpf"
+	$(QUIET_CC)$(MAKE) -C libbpf/src CFLAGS="$(LIBBPF_CFLAGS)" $P
+	$(QUIET_INSTALL)$(MAKE) -C libbpf/src install_headers DESTDIR=root $P
+
+libbpf_clean:
+	$(Q)$(MAKE) -C libbpf/src clean $P
+
+else
+
+libbpf_clean:
+	@echo -n
+endif