From f61359e16ef911a8fc01e7028942d9cad0bd8a96 Mon Sep 17 00:00:00 2001
From: Tony Ambardar <itugrok@yahoo.com>
Date: Sat, 15 Dec 2018 18:26:48 -0800
Subject: iproute2: support eBFP/XDP object file loading, simplify linking
 libelf

Add build and runtime dependencies on libelf, allowing tc and ip-full
to load BPF and XDP object files respectively.

Define package 'tc' as a singleton package variant, which can be used to
enable additional functionality limited only to tc. Also set ip-tiny
as the default 'ip' variant.

Preserve optionality of libelf by having configuration script follow the
HAVE_ELF environment variable, used similarly to the HAVE_MNL variable.

Signed-off-by: Tony Ambardar <itugrok@yahoo.com>
---
 .../patches/145-keep_libelf_optional.patch         | 11 ++++
 .../patches/190-link-libelf-to-tc-only.patch       | 60 ----------------------
 2 files changed, 11 insertions(+), 60 deletions(-)
 create mode 100644 package/network/utils/iproute2/patches/145-keep_libelf_optional.patch
 delete mode 100644 package/network/utils/iproute2/patches/190-link-libelf-to-tc-only.patch

(limited to 'package/network/utils/iproute2/patches')

diff --git a/package/network/utils/iproute2/patches/145-keep_libelf_optional.patch b/package/network/utils/iproute2/patches/145-keep_libelf_optional.patch
new file mode 100644
index 0000000000..2e3ad18809
--- /dev/null
+++ b/package/network/utils/iproute2/patches/145-keep_libelf_optional.patch
@@ -0,0 +1,11 @@
+--- a/configure
++++ b/configure
+@@ -228,7 +228,7 @@ EOF
+ 
+ check_elf()
+ {
+-    if ${PKG_CONFIG} libelf --exists; then
++    if [ "${HAVE_ELF}" = "y" ] && ${PKG_CONFIG} libelf --exists; then
+ 	echo "HAVE_ELF:=y" >>$CONFIG
+ 	echo "yes"
+ 
diff --git a/package/network/utils/iproute2/patches/190-link-libelf-to-tc-only.patch b/package/network/utils/iproute2/patches/190-link-libelf-to-tc-only.patch
deleted file mode 100644
index 31aacffba8..0000000000
--- a/package/network/utils/iproute2/patches/190-link-libelf-to-tc-only.patch
+++ /dev/null
@@ -1,60 +0,0 @@
---- a/configure
-+++ b/configure
-@@ -231,8 +231,9 @@ check_elf()
- 	echo "HAVE_ELF:=y" >>$CONFIG
- 	echo "yes"
- 
--	echo 'CFLAGS += -DHAVE_ELF' `${PKG_CONFIG} libelf --cflags` >> $CONFIG
--	echo 'LDLIBS += ' `${PKG_CONFIG} libelf --libs` >>$CONFIG
-+	echo 'CFLAGS += -DHAVE_ELF' >> $CONFIG
-+	echo 'ELF_CFLAGS += ' `${PKG_CONFIG} libelf --cflags` >> $CONFIG
-+	echo 'ELF_LDLIBS += ' `${PKG_CONFIG} libelf --libs` >>$CONFIG
-     else
- 	echo "no"
-     fi
---- a/lib/Makefile
-+++ b/lib/Makefile
-@@ -11,9 +11,17 @@ UTILOBJ = utils.o rt_names.o ll_map.o ll
- 	inet_proto.o namespace.o json_writer.o json_print.o \
- 	names.o color.o bpf.o exec.o fs.o
- 
-+ELFOBJ=$(patsubst %.o,%.elf.o,$(UTILOBJ))
-+
- NLOBJ=libgenl.o libnetlink.o
- 
--all: libnetlink.a libutil.a
-+all: libnetlink.a libutil.a libutil-elf.a
-+
-+%.o: %.c
-+	$(QUIET_CC)$(CC) $(CFLAGS) -UHAVE_ELF $(EXTRA_CFLAGS) -c -o $@ $<
-+
-+%.elf.o: %.c
-+	$(QUIET_CC)$(CC) $(CFLAGS) $(ELF_CFLAGS) $(EXTRA_CFLAGS) -c -o $@ $<
- 
- libnetlink.a: $(NLOBJ)
- 	$(QUIET_AR)$(AR) rcs $@ $^
-@@ -21,7 +29,10 @@ libnetlink.a: $(NLOBJ)
- libutil.a: $(UTILOBJ) $(ADDLIB)
- 	$(QUIET_AR)$(AR) rcs $@ $^
- 
-+libutil-elf.a: $(ELFOBJ) $(ADDLIB)
-+	$(QUIET_AR)$(AR) rcs $@ $^
-+
- install:
- 
- clean:
--	rm -f $(NLOBJ) $(UTILOBJ) $(ADDLIB) libnetlink.a libutil.a
-+	rm -f $(NLOBJ) $(UTILOBJ) $(ELFOBJ) $(ADDLIB) libnetlink.a libutil.a libutil-elf.a
---- a/tc/Makefile
-+++ b/tc/Makefile
-@@ -133,8 +133,8 @@ MODDESTDIR := $(DESTDIR)$(LIBDIR)/tc
- 
- all: tc $(TCSO)
- 
--tc: $(TCOBJ) $(LIBNETLINK) libtc.a
--	$(QUIET_LINK)$(CC) $^ $(LDFLAGS) $(LDLIBS) -o $@
-+tc: $(TCOBJ) $(subst libutil.a,libutil-elf.a,$(LIBNETLINK)) libtc.a
-+	$(QUIET_LINK)$(CC) $^ $(LDFLAGS) $(LDLIBS) $(ELF_LDLIBS) -o $@
- 
- libtc.a: $(TCLIB)
- 	$(QUIET_AR)$(AR) rcs $@ $^
-- 
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