lwip (inet's alternative) is compiled by default

distrib/sets/lists/minix/mi

@@ -1091,6 +1091,8 @@
 ./usr/lib/libfl.a			minix-sys
 ./usr/lib/libgcc.a			minix-sys
 ./usr/lib/libl.a			minix-sys
+./usr/lib/liblwip.a			minix-sys
+./usr/lib/liblwip_pic.a			minix-sys
 ./usr/lib/liblzma.a			minix-sys
 ./usr/lib/liblzma_pic.a			minix-sys
 ./usr/lib/liblzma.so.0.0		minix-sys
@@ -3798,6 +3800,7 @@
 ./usr/sbin/ipc				minix-sys
 ./usr/sbin/kernel			minix-sys
 ./usr/sbin/log				minix-sys
+./usr/sbin/lwip				minix-sys
 ./usr/sbin/memory			minix-sys
 ./usr/sbin					minix-sys
 ./usr/sbin/mkproto			minix-sys

lib/Makefile

@@ -43,7 +43,11 @@ SUBDIR+= libcompat_minix libblockdriver libchardriver     \
        libexec libdevman libusb libasyn librmt \
        libddekit libminixfs libbdev libelf libminc libcrypt libterminfo \
        libutil libbz2 libprop \
-       libnetsock libpuffs libsffs
+       libpuffs libsffs
+
+.if (${MKLWIP} == "yes")
+SUBDIR += liblwip libnetsock
+.endif
 
 .if (${MACHINE_ARCH} == "i386")
 SUBDIR += libvassert libhgfs libvboxfs libvirtio

servers/Makefile

@@ -16,6 +16,10 @@ SUBDIR=	ds ext2 inet init ipc is iso9660fs \
 SUBDIR+= hgfs vbfs
 .endif
 
+.if ${MKLWIP} == "yes"
+SUBDIR += lwip
+.endif
+
 .endif
 
 .include <bsd.subdir.mk>

share/mk/bsd.own.mk

@@ -931,7 +931,7 @@ _MKVARS.yes+= \
 	MKMCONTEXT MKSYSDEBUG MKLIVEUPDATE MKSTATECTL MKTRACE
 .if (${MACHINE_ARCH} == "i386")
 _MKVARS.yes+= \
-	MKWATCHDOG MKACPI MKAPIC MKDEBUGREG MKINSTALLBOOT MKPCI
+	MKWATCHDOG MKACPI MKAPIC MKDEBUGREG MKINSTALLBOOT MKPCI MKLWIP
 .endif
 
 .for var in ${_MKVARS.yes}