iproute2: avoid unneeded compiles to speed building

Skip building Makefile targets that aren't packaged: tipc, dcb, ifstat,
rtacct, lnstat, and man. Also, only compile targets needed for the current
build variant i.e. don't compile 'tc' when building an 'ip' variant and
vice versa.

These changes reduce typical build times by over 30%:
  $ make package/iproute2/clean && time make -j8 package/iproute2/compile
  (old)
  ...
  real    2m24.985s
  user    3m12.537s
  sys     0m26.677s

  (new)
  ...
  real    1m36.945s
  user    2m8.734s
  sys     0m20.046s

Signed-off-by: Tony Ambardar <itugrok@yahoo.com>

4 files changed, 31 insertions, 3 deletions

diff --git a/package/network/utils/iproute2/Makefile b/package/network/utils/iproute2/Makefile
index d7a7b3ed0f..54165636c7 100644
--- a/package/network/utils/iproute2/Makefile
+++ b/package/network/utils/iproute2/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=iproute2
 PKG_VERSION:=5.11.0
-PKG_RELEASE:=3
+PKG_RELEASE:=4
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=@KERNEL/linux/utils/net/iproute2
@@ -153,6 +153,7 @@ MAKE_FLAGS += \
 	KERNEL_INCLUDE="$(LINUX_DIR)/user_headers/include" \
 	SHARED_LIBS=$(SHARED_LIBS) \
 	IP_CONFIG_TINY=$(IP_CONFIG_TINY) \
+	BUILD_VARIANT=$(BUILD_VARIANT) \
 	LIBBPF_FORCE=$(LIBBPF_FORCE) \
 	HAVE_ELF=$(HAVE_ELF) \
 	HAVE_MNL=$(HAVE_MNL) \
diff --git a/package/network/utils/iproute2/patches/120-no_arpd.patch b/package/network/utils/iproute2/patches/120-no_arpd_ifstat_rtacct_lnstat.patch
index 772398140b..bb6a8d0180 100644
--- a/package/network/utils/iproute2/patches/120-no_arpd.patch
+++ b/package/network/utils/iproute2/patches/120-no_arpd_ifstat_rtacct_lnstat.patch
@@ -1,6 +1,11 @@
 --- a/misc/Makefile
 +++ b/misc/Makefile
-@@ -6,9 +6,9 @@ TARGETS=ss nstat ifstat rtacct lnstat
+@@ -2,13 +2,13 @@
+ SSOBJ=ss.o ssfilter_check.o ssfilter.tab.o
+ LNSTATOBJ=lnstat.o lnstat_util.o
+ 
+-TARGETS=ss nstat ifstat rtacct lnstat
++TARGETS=ss nstat
  
  include ../config.mk
  
diff --git a/package/network/utils/iproute2/patches/130-no_netem.patch b/package/network/utils/iproute2/patches/130-no_netem_tipc_dcb_man.patch
index 7d2fa03945..e3faee0d8f 100644
--- a/package/network/utils/iproute2/patches/130-no_netem.patch
+++ b/package/network/utils/iproute2/patches/130-no_netem_tipc_dcb_man.patch
@@ -5,7 +5,7 @@
  YACCFLAGS = -d -t -v
  
 -SUBDIRS=lib ip tc bridge misc netem genl tipc devlink rdma dcb man
-+SUBDIRS=lib ip tc bridge misc genl tipc devlink rdma dcb man
++SUBDIRS=lib ip tc bridge misc genl devlink rdma
  
  LIBNETLINK=../lib/libutil.a ../lib/libnetlink.a
  LDLIBS += $(LIBNETLINK)
diff --git a/package/network/utils/iproute2/patches/195-build_variant_ip_tc.patch b/package/network/utils/iproute2/patches/195-build_variant_ip_tc.patch
new file mode 100644
index 0000000000..13418662ee
--- /dev/null
+++ b/package/network/utils/iproute2/patches/195-build_variant_ip_tc.patch
@@ -0,0 +1,22 @@
+--- a/ip/Makefile
++++ b/ip/Makefile
+@@ -26,7 +26,7 @@ STATIC_SYM_SOURCES:=$(filter-out $(STATI
+ 
+ ALLOBJ=$(IPOBJ) $(RTMONOBJ)
+ SCRIPTS=ifcfg rtpr routel routef
+-TARGETS=ip rtmon
++TARGETS=$(findstring ip,$(BUILD_VARIANT)) rtmon
+ 
+ all: $(TARGETS) $(SCRIPTS)
+ 
+--- a/tc/Makefile
++++ b/tc/Makefile
+@@ -141,7 +141,7 @@ MODDESTDIR := $(DESTDIR)$(LIBDIR)/tc
+ 	$(QUIET_CC)$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -shared -fpic $< -o $@
+ 
+ 
+-all: tc $(TCSO)
++all: $(findstring tc,$(BUILD_VARIANT)) $(TCSO)
+ 
+ tc: $(TCOBJ) $(LIBNETLINK) libtc.a
+ 	$(QUIET_LINK)$(CC) $(filter-out dynsyms.list, $^) $(LDFLAGS) $(LDLIBS) -o $@