Fix compile on Alpine linux

Author: rsmarples

compat/closefrom.c

@@ -27,6 +27,7 @@
 #endif
 
 #include <fcntl.h>
+#include <limits.h>
 #include <unistd.h>
 
 #if defined(__linux__) && defined(SYS_close_range)

configure

@@ -1218,7 +1218,6 @@ EOF
 	rm -f _rbtree.c _rbtree
 fi
 if [ "$RBTREE" = no ]; then
-	echo "RBTREE_CPPFLAGS=		-DRBLOCAL" >>$CONFIG_MK
 	echo "VENDOR_SRCS+=	vendor/rbtree.c" >>$CONFIG_MK
 	# Tell rbtree.c to #include "rbtree.h" rather than sys/rbtree.h
 	echo "RBTREE_CPPFLAGS+=	-DRBLOCAL" >>$CONFIG_MK

src/dev/Makefile

@@ -5,7 +5,7 @@ include ${TOP}/config.mk
 CFLAGS?=	-O2
 CSTD?=		c99
 CFLAGS+=	-std=${CSTD}
-CPPFLAGS+=	-I${TOP} -I${TOP}/src
+CPPFLAGS+=	-I${TOP} -I${TOP}/src -I${TOP}/vendor
 
 DEVDIR=		${LIBDIR}/dhcpcd/dev
 DSRC=		${DEV_PLUGINS:=.c}

src/if-linux-wext.c

@@ -69,7 +69,7 @@ if_getssid_wext(const char *ifname, uint8_t *ssid)
 	int s, retval;
 	struct iwreq iwr;
 
-	if ((s = xsocket(PF_INET, SOCK_DGRAM, 0)) == -1)
+	if ((s = socket(PF_INET, SOCK_DGRAM, 0)) == -1)
 		return -1;
 	memset(&iwr, 0, sizeof(iwr));
 	strlcpy(iwr.ifr_name, ifname, sizeof(iwr.ifr_name));