Fix non-Linux builds

Various tools are Linuxish and should thus only attempted to build on
Linux only. Some features are also Linux-only.

Also, libresolv is used on all GNU platforms, notably GNU/Hurd and
GNU/kfreeBSD.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

12 files changed, 20 insertions, 0 deletions

diff --git a/networking/arp.c b/networking/arp.c
index 16783ab95..6519f8156 100644
--- a/networking/arp.c
+++ b/networking/arp.c
@@ -15,6 +15,7 @@
 //config:config ARP
 //config:	bool "arp (10 kb)"
 //config:	default y
+//config:	select PLATFORM_LINUX
 //config:	help
 //config:	Manipulate the system ARP cache.
 
diff --git a/networking/arping.c b/networking/arping.c
index 86f0221ed..fd0e1b276 100644
--- a/networking/arping.c
+++ b/networking/arping.c
@@ -8,6 +8,7 @@
 //config:config ARPING
 //config:	bool "arping (9 kb)"
 //config:	default y
+//config:	select PLATFORM_LINUX
 //config:	help
 //config:	Ping hosts by ARP packets.
 
diff --git a/networking/brctl.c b/networking/brctl.c
index 956bd91f3..b353210d7 100644
--- a/networking/brctl.c
+++ b/networking/brctl.c
@@ -12,6 +12,7 @@
 //config:config BRCTL
 //config:	bool "brctl (4.7 kb)"
 //config:	default y
+//config:	select PLATFORM_LINUX
 //config:	help
 //config:	Manage ethernet bridges.
 //config:	Supports addbr/delbr and addif/delif.
diff --git a/networking/ifconfig.c b/networking/ifconfig.c
index 9ee232a66..4090959b8 100644
--- a/networking/ifconfig.c
+++ b/networking/ifconfig.c
@@ -27,6 +27,7 @@
 //config:config IFCONFIG
 //config:	bool "ifconfig (12 kb)"
 //config:	default y
+//config:	select PLATFORM_LINUX
 //config:	help
 //config:	Ifconfig is used to configure the kernel-resident network interfaces.
 //config:
diff --git a/networking/ifplugd.c b/networking/ifplugd.c
index 0b55bf4e5..bc4303ef0 100644
--- a/networking/ifplugd.c
+++ b/networking/ifplugd.c
@@ -9,6 +9,7 @@
 //config:config IFPLUGD
 //config:	bool "ifplugd (10 kb)"
 //config:	default y
+//config:	select PLATFORM_LINUX
 //config:	help
 //config:	Network interface plug detection daemon.
 
diff --git a/networking/ip.c b/networking/ip.c
index 7c3208699..23ee7d24b 100644
--- a/networking/ip.c
+++ b/networking/ip.c
@@ -11,6 +11,7 @@
 //config:config IP
 //config:	bool "ip (35 kb)"
 //config:	default y
+//config:	select PLATFORM_LINUX
 //config:	help
 //config:	The "ip" applet is a TCP/IP interface configuration and routing
 //config:	utility.
@@ -21,6 +22,7 @@
 //config:config IPADDR
 //config:	bool "ipaddr (14 kb)"
 //config:	default y
+//config:	select PLATFORM_LINUX
 //config:	select FEATURE_IP_ADDRESS
 //config:	help
 //config:	Short form of "ip addr"
@@ -28,6 +30,7 @@
 //config:config IPLINK
 //config:	bool "iplink (17 kb)"
 //config:	default y
+//config:	select PLATFORM_LINUX
 //config:	select FEATURE_IP_LINK
 //config:	help
 //config:	Short form of "ip link"
@@ -35,6 +38,7 @@
 //config:config IPROUTE
 //config:	bool "iproute (15 kb)"
 //config:	default y
+//config:	select PLATFORM_LINUX
 //config:	select FEATURE_IP_ROUTE
 //config:	help
 //config:	Short form of "ip route"
@@ -49,6 +53,7 @@
 //config:config IPRULE
 //config:	bool "iprule (10 kb)"
 //config:	default y
+//config:	select PLATFORM_LINUX
 //config:	select FEATURE_IP_RULE
 //config:	help
 //config:	Short form of "ip rule"
@@ -56,6 +61,7 @@
 //config:config IPNEIGH
 //config:	bool "ipneigh (8.3 kb)"
 //config:	default y
+//config:	select PLATFORM_LINUX
 //config:	select FEATURE_IP_NEIGH
 //config:	help
 //config:	Short form of "ip neigh"
diff --git a/networking/nameif.c b/networking/nameif.c
index 66e042688..3ccd935b8 100644
--- a/networking/nameif.c
+++ b/networking/nameif.c
@@ -12,6 +12,7 @@
 //config:config NAMEIF
 //config:	bool "nameif (6.6 kb)"
 //config:	default y
+//config:	select PLATFORM_LINUX
 //config:	select FEATURE_SYSLOG
 //config:	help
 //config:	nameif is used to rename network interface by its MAC address.
diff --git a/networking/route.c b/networking/route.c
index 26146f8e9..616572814 100644
--- a/networking/route.c
+++ b/networking/route.c
@@ -27,6 +27,7 @@
 //config:config ROUTE
 //config:	bool "route (8.7 kb)"
 //config:	default y
+//config:	select PLATFORM_LINUX
 //config:	help
 //config:	Route displays or manipulates the kernel's IP routing tables.
 
diff --git a/networking/tc.c b/networking/tc.c
index 43187f7ee..1f4bcce2b 100644
--- a/networking/tc.c
+++ b/networking/tc.c
@@ -9,6 +9,7 @@
 //config:config TC
 //config:	bool "tc (8.3 kb)"
 //config:	default y
+//config:	select PLATFORM_LINUX
 //config:	help
 //config:	Show / manipulate traffic control settings
 //config:
diff --git a/networking/traceroute.c b/networking/traceroute.c
index 4bbe1ab8e..2ba990fd0 100644
--- a/networking/traceroute.c
+++ b/networking/traceroute.c
@@ -963,8 +963,10 @@ traceroute_init(int op, char **argv)
 	if (af == AF_INET) {
 		xmove_fd(xsocket(AF_INET, SOCK_RAW, IPPROTO_ICMP), rcvsock);
 #if ENABLE_FEATURE_TRACEROUTE_VERBOSE
+# ifdef IP_PKTINFO
 		/* want recvmsg to report target local address (for -v) */
 		setsockopt_1(rcvsock, IPPROTO_IP, IP_PKTINFO);
+# endif
 #endif
 	}
 #if ENABLE_TRACEROUTE6
diff --git a/networking/tunctl.c b/networking/tunctl.c
index 97e6917aa..59cae331c 100644
--- a/networking/tunctl.c
+++ b/networking/tunctl.c
@@ -12,6 +12,7 @@
 //config:config TUNCTL
 //config:	bool "tunctl (6.2 kb)"
 //config:	default y
+//config:	select PLATFORM_LINUX
 //config:	help
 //config:	tunctl creates or deletes tun devices.
 //config:
diff --git a/networking/udhcp/Config.src b/networking/udhcp/Config.src
index 8c8c11c26..23e2b40d8 100644
--- a/networking/udhcp/Config.src
+++ b/networking/udhcp/Config.src
@@ -6,6 +6,7 @@
 config UDHCPD
 	bool "udhcpd (21 kb)"
 	default y
+	select PLATFORM_LINUX
 	help
 	udhcpd is a DHCP server geared primarily toward embedded systems,
 	while striving to be fully functional and RFC compliant.
@@ -53,6 +54,7 @@ config DUMPLEASES
 config DHCPRELAY
 	bool "dhcprelay (5.2 kb)"
 	default y
+	select PLATFORM_LINUX
 	help
 	dhcprelay listens for DHCP requests on one or more interfaces
 	and forwards these requests to a different interface or DHCP
@@ -61,6 +63,7 @@ config DHCPRELAY
 config UDHCPC
 	bool "udhcpc (24 kb)"
 	default y
+	select PLATFORM_LINUX
 	help
 	udhcpc is a DHCP client geared primarily toward embedded systems,
 	while striving to be fully functional and RFC compliant.