diff --git a/libc/calls/calls.mk b/libc/calls/calls.mk
index 0e31c8da9..003d04fef 100644
--- a/libc/calls/calls.mk
+++ b/libc/calls/calls.mk
@@ -83,6 +83,12 @@ o/$(MODE)/libc/calls/mkntenvblock.o:			\
 		OVERRIDE_CPPFLAGS +=			\
 			-DSTACK_FRAME_UNLIMITED
 
+o/$(MODE)/libc/calls/ioctl-siocgifconf.o		\
+o/$(MODE)/libc/calls/ioctl-siocgifconf-nt.o:		\
+		OVERRIDE_COPTS +=			\
+			-ffunction-sections		\
+			-fdata-sections
+
 LIBC_CALLS_LIBS = $(foreach x,$(LIBC_CALLS_ARTIFACTS),$($(x)))
 LIBC_CALLS_SRCS = $(foreach x,$(LIBC_CALLS_ARTIFACTS),$($(x)_SRCS))
 LIBC_CALLS_HDRS = $(foreach x,$(LIBC_CALLS_ARTIFACTS),$($(x)_HDRS))
diff --git a/libc/calls/ioctl-default.c b/libc/calls/ioctl_default.c
similarity index 100%
rename from libc/calls/ioctl-default.c
rename to libc/calls/ioctl_default.c
diff --git a/libc/calls/ioctl-siocgifconf-nt.c b/libc/calls/ioctl_siocgifconf-nt.c
similarity index 67%
rename from libc/calls/ioctl-siocgifconf-nt.c
rename to libc/calls/ioctl_siocgifconf-nt.c
index 76101b94c..3a1e4cede 100644
--- a/libc/calls/ioctl-siocgifconf-nt.c
+++ b/libc/calls/ioctl_siocgifconf-nt.c
@@ -16,45 +16,45 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/assert.h"
+#include "libc/bits/weaken.h"
 #include "libc/calls/calls.h"
 #include "libc/calls/internal.h"
-#include "libc/sysv/consts/o.h"
-#include "libc/sysv/consts/af.h"
-#include "libc/sock/sock.h"
-#include "libc/sock/internal.h"
-#include "libc/sysv/errfuns.h"
-#include "libc/sysv/consts/iff.h"
-#include "libc/nt/winsock.h"
 #include "libc/nt/errors.h"
 #include "libc/nt/iphlpapi.h"
+#include "libc/nt/runtime.h"
 #include "libc/nt/struct/ipadapteraddresses.h"
-#include "libc/bits/weaken.h"
+#include "libc/nt/winsock.h"
+#include "libc/sock/internal.h"
+#include "libc/sock/sock.h"
 #include "libc/str/str.h"
-#include "libc/assert.h"
-//#include "libc/nt/windows.h"        /* Needed for WideCharToMultiByte */
+#include "libc/sysv/consts/af.h"
+#include "libc/sysv/consts/iff.h"
+#include "libc/sysv/consts/o.h"
+#include "libc/sysv/errfuns.h"
 
 /* Maximum number of unicast addresses handled for each interface */
-#define MAX_UNICAST_ADDR    32
-#define MAX_NAME_CLASH      ((int)('z'-'a'))      /* Allow a..z */
-
-static int insertAdapterName(NtIpAdapterAddresses *aa);
+#define MAX_UNICAST_ADDR 32
+#define MAX_NAME_CLASH   ((int)('z' - 'a')) /* Allow a..z */
 
 struct HostAdapterInfoNode {
-  struct HostAdapterInfoNode * next;
-  char name[IFNAMSIZ];    /* Obtained from FriendlyName */
+  struct HostAdapterInfoNode *next;
+  char name[IFNAMSIZ]; /* Obtained from FriendlyName */
   struct sockaddr unicast;
   struct sockaddr netmask;
   struct sockaddr broadcast;
   short flags;
-} *__hostInfo;
+} * __hostInfo;
 
 /* Frees all the nodes of the _hostInfo */
-static void freeHostInfo() {
+static void freeHostInfo(void) {
   struct HostAdapterInfoNode *next, *node = __hostInfo;
-  while(node) {
-    next = node->next;
-    weaken(free)(node);
-    node = next;
+  if (weaken(free)) {
+    while (node) {
+      next = node->next;
+      weaken(free)(node);
+      node = next;
+    }
   }
   __hostInfo = NULL;
 }
@@ -65,14 +65,12 @@ static void freeHostInfo() {
  */
 static struct HostAdapterInfoNode *findAdapterByName(const char *name) {
   struct HostAdapterInfoNode *node = __hostInfo;
-  while(node) {
+  while (node) {
     if (!strncmp(name, node->name, IFNAMSIZ)) {
-      /* Found */
       return node;
     }
-    node=node->next;
+    node = node->next;
   }
-  /* Not found */
   return NULL;
 }
 
@@ -86,19 +84,22 @@ static struct HostAdapterInfoNode *findAdapterByName(const char *name) {
  */
 struct HostAdapterInfoNode *appendHostInfo(
     struct HostAdapterInfoNode *parentInfoNode,
-    const char *baseName,               /* Max length = IFNAMSIZ-1 */
-    const NtIpAdapterAddresses *aa,     /* Top level adapter object being processed */
-    NtIpAdapterUnicastAddress **ptrUA,  /* Ptr to ptr to unicast address list node */
-    NtIpAdapterPrefix **ptrAP,          /* Ptr to ptr to Adapter prefix list node */
-    int count) {                        /* count is used to create a unique name in case of alias */
+    const char *baseName, /* Max length = IFNAMSIZ-1 */
+    const struct NtIpAdapterAddresses
+        *aa, /* Top level adapter object being processed */
+    struct NtIpAdapterUnicastAddress *
+        *ptrUA, /* Ptr to ptr to unicast address list node */
+    struct NtIpAdapterPrefix *
+        *ptrAP,  /* Ptr to ptr to Adapter prefix list node */
+    int count) { /* count is used to create a unique name in case of alias */
 
   struct HostAdapterInfoNode *temp;
   struct HostAdapterInfoNode *node;
-  struct sockaddr_in tempAddr;
+  uint32_t ip, netmask, broadcast;
+  struct sockaddr_in *a;
   int attemptNum;
 
-  node = weaken(calloc)(1, sizeof(*node));
-  if (!node) {
+  if (!weaken(calloc) || !(node = weaken(calloc)(1, sizeof(*node)))) {
     errno = ENOMEM;
     return NULL;
   }
@@ -109,37 +110,38 @@ struct HostAdapterInfoNode *appendHostInfo(
   if (count > 0 || ((*ptrUA)->Next != NULL)) {
     /* Yes, compose it using <baseName>:<count> */
     size_t nameLen = strlen(node->name);
-    if (nameLen+2 > IFNAMSIZ-2) {
+    if (nameLen + 2 > IFNAMSIZ - 2) {
       /* Appending the ":x" will exceed the size, need to chop the end */
       nameLen -= 2;
     }
-    node->name[nameLen-2] = ':';
-    node->name[nameLen-1] = '0'+count;
+    node->name[nameLen - 2] = ':';
+    node->name[nameLen - 1] = '0' + count;
     node->name[nameLen] = '\0';
   }
 
   /* Is there a name clash with other interfaces? */
-  for (attemptNum=0; attemptNum < MAX_NAME_CLASH; ++attemptNum) {
+  for (attemptNum = 0; attemptNum < MAX_NAME_CLASH; ++attemptNum) {
     temp = findAdapterByName(node->name);
     if (!temp) {
       break;
-
     } else {
-      /* Yes, this name has been already used, append an extra 
+      /* Yes, this name has been already used, append an extra
        * character to resolve conflict. Note since the max length
        * of the string now is IFNAMSIZ-2, we have just enough space for this.
        * E.g. 'Ethernet_1' -> 'Ethernet_1a'
        */
-
       size_t pos = strlen(node->name);
       node->name[pos] = 'a' + attemptNum;
-      node->name[pos+1] = '\0';
+      node->name[pos + 1] = '\0';
       /* Try again */
     }
   }
+
   if (attemptNum == MAX_NAME_CLASH) {
     /* Cannot resolve the conflict */
-    weaken(free)(node);
+    if (weaken(free)) {
+      weaken(free)(node);
+    }
     errno = EEXIST;
     return NULL;
   }
@@ -161,28 +163,47 @@ struct HostAdapterInfoNode *appendHostInfo(
     flags = 0;
     if (aa->OperStatus == kNtIfOperStatusUp) flags |= IFF_UP | IFF_RUNNING;
     if (aa->IfType == kNtIfTypePpp) flags |= IFF_POINTOPOINT;
-    //if (aa->TunnelType != TUNNEL_TYPE_NONE) flags |= IFF_POINTOPOINT;
-    if (aa->NoMulticast == 0) flags |= IFF_MULTICAST;
+    if (!(aa->Flags & kNtIpAdapterNoMulticast)) flags |= IFF_MULTICAST;
     if (aa->IfType == kNtIfTypeSoftwareLoopback) flags |= IFF_LOOPBACK;
-    if (aa->FirstPrefix != NULL) flags |= IFF_BROADCAST;
+    if (aa->FirstPrefix) flags |= IFF_BROADCAST;
     node->flags = flags;
   } else {
     /* Copy from previous node */
     node->flags = parentInfoNode->flags;
   }
 
+  ip = ntohl(
+      ((struct sockaddr_in *)(*ptrUA)->Address.lpSockaddr)->sin_addr.s_addr);
+  netmask = (uint32_t)-1 << (32 - (*ptrUA)->OnLinkPrefixLength);
+  broadcast = (ip & netmask) | (~netmask & -1);
+
+  a = (struct sockaddr_in *)&node->netmask;
+  a->sin_family = AF_INET;
+  a->sin_addr.s_addr = htonl(netmask);
+
+  a = (struct sockaddr_in *)&node->broadcast;
+  a->sin_family = AF_INET;
+  a->sin_addr.s_addr = htonl(broadcast);
+
   /* Process the prefix and extract the netmask and broadcast */
   /* According to the doc:
-   *  ... On Windows Vista and later, the linked IP_ADAPTER_PREFIX structures pointed to 
-   *  by the FirstPrefix member include three IP adapter prefixes for each IP address 
-   *  assigned to the adapter. These include the host IP address prefix, the subnet IP 
-   *  address prefix, and the subnet broadcast IP address prefix. In addition, for each 
-   *  adapter there is a multicast address prefix and a broadcast address prefix.
+   *
+   *     On Windows Vista and later, the linked IP_ADAPTER_PREFIX
+   *     structures pointed to by the FirstPrefix member include three
+   *     IP adapter prefixes for each IP address assigned to the
+   *     adapter. These include the host IP address prefix, the subnet
+   *     IP address prefix, and the subnet broadcast IP address prefix.
+   *     In addition, for each adapter there is a multicast address
+   *     prefix and a broadcast address prefix.
+   *                   -Source: MSDN on IP_ADAPTER_ADDRESSES_LH
    *
    * For example, interface "Ethernet", with 2 unicast addresses:
-   *  - 192.168.1.84 
+   *
+   *  - 192.168.1.84
    *  - 192.168.5.99
+   *
    * The Prefix list has 8 elements:
+   *
    *  #1: 192.168.1.0/24      <- Network, use the PrefixLength for netmask
    *  #2: 192.168.1.84/32     <- Host IP
    *  #3: 192.168.1.255/32    <- Subnet broadcast
@@ -195,20 +216,16 @@ struct HostAdapterInfoNode *appendHostInfo(
    *  #8: 255.255.255.255/32  <- Broadcast
    */
 
-  /* Netmask */
-  memset(&tempAddr, 0, sizeof(tempAddr));
-  tempAddr.sin_family = AF_INET;
-  tempAddr.sin_addr.s_addr = (uint32_t)((1LLU << (*ptrAP)->PrefixLength) - 1LLU);
-  memcpy(&node->netmask, &tempAddr, sizeof(tempAddr));
+  if (ptrAP && *ptrAP) {
+    *ptrAP = (*ptrAP)->Next; /* skip net ip */
+    if (*ptrAP) {
+      *ptrAP = (*ptrAP)->Next; /* skip host ip */
+      if (*ptrAP) {
+        node->broadcast = *((*ptrAP)->Address.lpSockaddr);
+      }
+    }
+  }
 
-  *ptrAP = (*ptrAP)->Next;
-  *ptrAP = (*ptrAP)->Next;    /* Skip over Host IP */
-
-  /* Broadcast */
-  node->broadcast = *((*ptrAP)->Address.lpSockaddr);
-  *ptrAP = (*ptrAP)->Next;
-
-  /* Move pointer to Unicast Address record */
   *ptrUA = (*ptrUA)->Next;
 
   /* Append this node to the last node (if any) */
@@ -221,10 +238,10 @@ struct HostAdapterInfoNode *appendHostInfo(
 }
 
 /* Returns -1 in case of failure */
-static int createHostInfo(NtIpAdapterAddresses *firstAdapter) {
-  NtIpAdapterAddresses *aa;
-  NtIpAdapterUnicastAddress *ua;
-  NtIpAdapterPrefix *ap;
+static int createHostInfo(struct NtIpAdapterAddresses *firstAdapter) {
+  struct NtIpAdapterAddresses *aa;
+  struct NtIpAdapterUnicastAddress *ua;
+  struct NtIpAdapterPrefix *ap;
   struct HostAdapterInfoNode *node = NULL;
   char baseName[IFNAMSIZ];
   char name[IFNAMSIZ];
@@ -232,34 +249,31 @@ static int createHostInfo(NtIpAdapterAddresses *firstAdapter) {
 
   /* __hostInfo must be empty */
   assert(__hostInfo == NULL);
-  assert(weaken(tprecode16to8));
 
   for (aa = firstAdapter; aa; aa = aa->Next) {
-    /* Skip all the interfaces with no address and the ones that are not AF_INET */
-    if (!aa->FirstUnicastAddress || 
+    /* Skip all the interfaces with no address and the ones that are not AF_INET
+     */
+    if (!aa->FirstUnicastAddress ||
         aa->FirstUnicastAddress->Address.lpSockaddr->sa_family != AF_INET) {
       continue;
     }
 
     /* Use max IFNAMSIZ-1 chars, leave the last char for eventual conficts */
-    tprecode16to8(baseName, IFNAMSIZ-1, aa->FriendlyName);
-    baseName[IFNAMSIZ-2] = '\0';
+    tprecode16to8(baseName, IFNAMSIZ - 1, aa->FriendlyName);
+    baseName[IFNAMSIZ - 2] = '\0';
     /* Replace any space with a '_' */
-    for (i = 0; i < IFNAMSIZ-2; ++i) {
+    for (i = 0; i < IFNAMSIZ - 2; ++i) {
       if (baseName[i] == ' ') baseName[i] = '_';
       if (!baseName[i]) break;
     }
-    for (count = 0, ua = aa->FirstUnicastAddress, ap = aa->FirstPrefix; 
-        (ua != NULL) && (count < MAX_UNICAST_ADDR); 
-        ++count) {
+    for (count = 0, ua = aa->FirstUnicastAddress, ap = aa->FirstPrefix;
+         (ua != NULL) && (count < MAX_UNICAST_ADDR); ++count) {
       node = appendHostInfo(node, baseName, aa, &ua, &ap, count);
-      if (!node) {
-        goto err;
-      }
+      if (!node) goto err;
       if (!__hostInfo) __hostInfo = node;
     }
 
-    /* Note: do we need to process the remaining adapter prefix? 
+    /* Note: do we need to process the remaining adapter prefix?
      *      ap       - points to broadcast addr
      *      ap->Next - points to interface multicast addr
      * Ignoring them for now
@@ -268,55 +282,57 @@ static int createHostInfo(NtIpAdapterAddresses *firstAdapter) {
   return 0;
 
 err:
-  freeHostInfo(__hostInfo);
+  freeHostInfo();
   return -1;
 }
 
 static int readAdapterAddresses(void) {
   uint32_t size, rc;
-  NtIpAdapterAddresses * aa = NULL;
-
-  assert(weaken(GetAdaptersAddresses));
+  struct NtIpAdapterAddresses *aa = NULL;
 
   /* Calculate the required data size
-   * Note: alternatively you can use AF_UNSPEC to also return IPv6 interfaces 
+   * Note: alternatively you can use AF_UNSPEC to also return IPv6 interfaces
    */
-  rc = weaken(GetAdaptersAddresses)(AF_INET,  
-      kNtGaaFlagSkipAnycast | kNtGaaFlagSkipMulticast | kNtGaaFlagSkipDnsServer | kNtGaaFlagIncludePrefix,
-      NULL,  /* Reserved */
-      NULL,  /* Ptr */
-      &size);
+  rc = GetAdaptersAddresses(AF_INET,
+                            kNtGaaFlagSkipAnycast | kNtGaaFlagSkipMulticast |
+                                kNtGaaFlagSkipDnsServer |
+                                kNtGaaFlagIncludePrefix,
+                            NULL, /* Reserved */
+                            NULL, /* Ptr */
+                            &size);
   if (rc != kNtErrorBufferOverflow) {
     ebadf();
     goto err;
   }
 
-  aa = (NtIpAdapterAddresses *)weaken(malloc)(size);
-  if (!aa) {
+  if (!weaken(malloc) ||
+      !(aa = (struct NtIpAdapterAddresses *)weaken(malloc)(size))) {
     enomem();
     goto err;
   }
 
   /* Re-run GetAdaptersAddresses this time with a valid buffer */
-  rc = weaken(GetAdaptersAddresses)(AF_INET, 
-      kNtGaaFlagSkipAnycast | kNtGaaFlagSkipMulticast | kNtGaaFlagSkipDnsServer | kNtGaaFlagIncludePrefix,
-      //kNtGaaFlagIncludePrefix,
-      NULL, 
-      aa, 
-      &size);
+  rc = GetAdaptersAddresses(AF_INET,
+                            kNtGaaFlagSkipAnycast | kNtGaaFlagSkipMulticast |
+                                kNtGaaFlagSkipDnsServer |
+                                kNtGaaFlagIncludePrefix,
+                            // kNtGaaFlagIncludePrefix,
+                            NULL, aa, &size);
   if (rc != kNtErrorSuccess) {
-    efault();
+    errno = GetLastError();
     goto err;
   }
   if (createHostInfo(aa) == -1) {
     goto err;
   }
 
-  weaken(free)(aa);
+  if (weaken(free)) {
+    weaken(free)(aa);
+  }
   return 0;
 
 err:
-  if (aa) {
+  if (weaken(free)) {
     weaken(free)(aa);
   }
   freeHostInfo();
@@ -324,7 +340,7 @@ err:
 }
 
 textwindows int ioctl_siocgifconf_nt(int fd, struct ifconf *ifc) {
-  NtIpAdapterAddresses *aa;
+  struct NtIpAdapterAddresses *aa;
   struct HostAdapterInfoNode *node;
   struct ifreq *ptr;
 
@@ -337,8 +353,8 @@ textwindows int ioctl_siocgifconf_nt(int fd, struct ifconf *ifc) {
   }
 
   for (ptr = ifc->ifc_req, node = __hostInfo;
-      (((char *)(ptr+1) - ifc->ifc_buf) < ifc->ifc_len) && node;
-      ptr++, node = node->next) {
+       (((char *)(ptr + 1) - ifc->ifc_buf) < ifc->ifc_len) && node;
+       ptr++, node = node->next) {
     memcpy(ptr->ifr_name, node->name, IFNAMSIZ);
     memcpy(&ptr->ifr_addr, &node->unicast, sizeof(struct sockaddr));
   }
@@ -347,14 +363,13 @@ textwindows int ioctl_siocgifconf_nt(int fd, struct ifconf *ifc) {
   return 0;
 }
 
-/* Performs the SIOCGIFADDR operation */
+/**
+ * Returns unicast addresses.
+ */
 int ioctl_siocgifaddr_nt(int fd, struct ifreq *ifr) {
   struct HostAdapterInfoNode *node;
-
   node = findAdapterByName(ifr->ifr_name);
-  if (!node) {
-    return ebadf();
-  }
+  if (!node) return ebadf();
   memcpy(&ifr->ifr_addr, &node->unicast, sizeof(struct sockaddr));
   return 0;
 }
@@ -362,37 +377,28 @@ int ioctl_siocgifaddr_nt(int fd, struct ifreq *ifr) {
 /* Performs the SIOCGIFFLAGS operation */
 int ioctl_siocgifflags_nt(int fd, struct ifreq *ifr) {
   struct HostAdapterInfoNode *node;
-
   node = findAdapterByName(ifr->ifr_name);
-  if (!node) {
-    return ebadf();
-  }
+  if (!node) return ebadf();
   ifr->ifr_flags = node->flags;
   return 0;
 }
 
-
 /* Performs the SIOCGIFNETMASK operation */
 int ioctl_siocgifnetmask_nt(int fd, struct ifreq *ifr) {
   struct HostAdapterInfoNode *node;
-
   node = findAdapterByName(ifr->ifr_name);
-  if (!node) {
-    return ebadf();
-  }
+  if (!node) return ebadf();
   memcpy(&ifr->ifr_netmask, &node->netmask, sizeof(struct sockaddr));
   return 0;
 }
 
-/* Performs the SIOCGIFBRDADDR operation */
+/**
+ * Returns broadcast address.
+ */
 int ioctl_siocgifbrdaddr_nt(int fd, struct ifreq *ifr) {
   struct HostAdapterInfoNode *node;
-
   node = findAdapterByName(ifr->ifr_name);
-  if (!node) {
-    return ebadf();
-  }
+  if (!node) return ebadf();
   memcpy(&ifr->ifr_broadaddr, &node->broadcast, sizeof(struct sockaddr));
   return 0;
 }
-
diff --git a/libc/calls/ioctl-siocgifconf.c b/libc/calls/ioctl_siocgifconf.c
similarity index 70%
rename from libc/calls/ioctl-siocgifconf.c
rename to libc/calls/ioctl_siocgifconf.c
index 5bcc144e6..427a4dd74 100644
--- a/libc/calls/ioctl-siocgifconf.c
+++ b/libc/calls/ioctl_siocgifconf.c
@@ -16,12 +16,15 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/assert.h"
 #include "libc/bits/weaken.h"
-#include "libc/sysv/errfuns.h"
 #include "libc/calls/internal.h"
-#include "libc/sock/sock.h"
 #include "libc/sock/internal.h"
+#include "libc/sock/sock.h"
+#include "libc/str/str.h"
+#include "libc/sysv/consts/af.h"
 #include "libc/sysv/consts/sio.h"
+#include "libc/sysv/errfuns.h"
 
 /* SIOCGIFCONF:
  * Takes an struct ifconf object of a given size
@@ -29,7 +32,7 @@
  *  - ifc_len: set it to the number of valid ifreq structures representing
  *    the interfaces
  *  - ifc_ifcu.ifcu_req: sets the name of the interface for each interface
- * The ifc_len is an input/output parameter: set it to the total size of 
+ * The ifc_len is an input/output parameter: set it to the total size of
  * the ifcu_buf (ifcu_req) buffer on input.
  */
 int ioctl_default(int, uint64_t, void *) hidden;
@@ -40,79 +43,59 @@ int ioctl_siocgifnetmask_nt(int, struct ifreq *) hidden;
 int ioctl_siocgifbrdaddr_nt(int, struct ifreq *) hidden;
 
 static int ioctl_siocgifconf_sysv(int fd, struct ifconf *ifc) {
-  if (IsBsd()) {
-    /* BSD uses a slightly different memory structure where:
-     * - sizeof(struct ifreq) is 32 bytes instead of 40 bytes
-     * - ifc.ifc_len is uint32_t instead of uint64_t
-     * - struct ifconf is #pragma pack(4) (instead of the default pack(8))
-     */
-    int i;
-    char *buf;      /* Temporary buffer to store ifreq */
-    char *pBsdReq;  /* Scan through buf records */
-    char *pBsdEnd;  /* End of the ifreq */
-
-    struct ifconf_bsd ifc_bsd;
-    struct ifreq_bsd *bsdReq;
-    struct ifreq *req;
-    size_t numReq = ifc->ifc_len / sizeof(struct ifreq);
-
-    if (!weaken(malloc)) {
-      return enomem();
-    } 
-    ifc_bsd.ifc_len = numReq * sizeof(struct ifreq_bsd);
-    buf = weaken(malloc)(ifc_bsd.ifc_len);
-    if (!buf) {
-      return enomem();
-    }
-    ifc_bsd.ifc_buf = buf;
-
-    if ((i = sys_ioctl(fd, SIOCGIFCONF, &ifc_bsd)) < 0) {
-      weaken(free)(buf);
-      return -1;
-    }
-
-    /* On BSD the size of the struct ifreq is different than Linux.
-     * On Linux is fixed (40 bytes), but on BSD the struct sockaddr
+  /*
+   * We're 100% compatible with Linux.
+   * BSD ABIs mainly differ by having sockaddr::sa_len
+   * XNU uses a 32-bit length in a struct that's packed!
+   */
+  int i, rc, fam;
+  char *b, *p, *e;
+  char ifcBsd[16];
+  struct ifreq *req;
+  struct ifreq *end;
+  uint32_t bufLen, ip;
+  size_t numReq, bufMax;
+  if (IsLinux()) return sys_ioctl(fd, SIOCGIFCONF, ifc);
+  if (!weaken(malloc)) return enomem();
+  bufMax = 15000; /* conservative guesstimate */
+  if (!(b = weaken(malloc)(bufMax))) return enomem();
+  memcpy(ifcBsd, &bufMax, 8);                /* ifc_len */
+  memcpy(ifcBsd + (IsXnu() ? 4 : 8), &b, 8); /* ifc_buf */
+  if ((rc = sys_ioctl(fd, SIOCGIFCONF, &ifcBsd)) != -1) {
+    /*
+     * On XNU the size of the struct ifreq is different than Linux.
+     * On Linux is fixed (40 bytes), but on XNU the struct sockaddr
      * has variable length, making the whole struct ifreq a variable
      * sized record.
      */
-    for (pBsdReq = buf, pBsdEnd = buf + ifc_bsd.ifc_len, req = ifc->ifc_req;
-        pBsdReq < pBsdEnd;
-        ++req) {
-      bsdReq = (struct ifreq_bsd *)pBsdReq;
-      memcpy(req->ifr_name, bsdReq->ifr_name, IFNAMSIZ);
-      memcpy(&req->ifr_addr, &bsdReq->ifr_addr, sizeof(struct sockaddr_bsd));
-      sockaddr2linux(&req->ifr_addr);
-
-      pBsdReq += IFNAMSIZ + bsdReq->ifr_addr.sa_len;
+    memcpy(&bufLen, b, 4);
+    req = ifc->ifc_req;
+    end = req + ifc->ifc_len / sizeof(*req);
+    for (p = b, e = p + MIN(bufMax, READ32LE(ifcBsd)); p + 16 + 16 <= e;
+         p += IsBsd() ? 16 + MAX(16, p[16] & 255) : 40) {
+      fam = p[IsBsd() ? 17 : 16] & 255;
+      if (fam != AF_INET) continue;
+      ip = READ32BE(p + 20);
+      memset(req, 0, sizeof(*req));
+      memcpy(req->ifr_name, p, 16);
+      memcpy(&req->ifr_addr, p + 16, 16);
+      req->ifr_addr.sa_family = fam;
+      ((struct sockaddr_in *)&req->ifr_addr)->sin_addr.s_addr = htonl(ip);
+      ++req;
     }
-
-    /* Adjust len */
-    ifc->ifc_len = (size_t)((char *)req - ifc->ifc_buf);
-    weaken(free)(buf);
-    return 0;
-
-  } else {
-    /* 100% compatible with Linux */
-    return sys_ioctl(fd, SIOCGIFCONF, ifc);
+    ifc->ifc_len = (char *)req - ifc->ifc_buf; /* Adjust len */
   }
+  if (weaken(free)) weaken(free)(b);
+  return rc;
 }
 
 /* Used for all the ioctl that returns sockaddr structure that
- * requires adjustment between Linux and BSD
+ * requires adjustment between Linux and XNU
  */
 static int ioctl_siocgifaddr_sysv(int fd, uint64_t op, struct ifreq *ifr) {
-  int i;
-
-  if (IsBsd()) {
-    sockaddr2bsd(&ifr->ifr_addr);
-  }
-  if ((i = sys_ioctl(fd, op, ifr)) < 0) {
-    return -1;
-  }
-  if (IsBsd()) {
-    sockaddr2linux(&ifr->ifr_addr);
-  }
+  if (IsBsd()) sockaddr2bsd(&ifr->ifr_addr);
+  if (sys_ioctl(fd, op, ifr) == -1) return -1;
+  if (IsBsd()) sockaddr2linux(&ifr->ifr_addr);
   return 0;
 }
 
@@ -163,14 +146,13 @@ int ioctl_siocgifdstaddr(int fd, void *ifr) {
      * GetAdaptersAddresses function
      *
     return ioctl_siocgifbrdaddr_nt(fd, ifc);
-
      */
   }
 }
 
 int ioctl_siocgifflags(int fd, void *ifr) {
   if (!IsWindows()) {
-    /* Both BSD and Linux are for once compatible here... */
+    /* Both XNU and Linux are for once compatible here... */
     return ioctl_default(fd, SIOCGIFFLAGS, ifr);
   } else {
     return ioctl_siocgifflags_nt(fd, (struct ifreq *)ifr);
diff --git a/libc/calls/ioctl-tcgets-nt.c b/libc/calls/ioctl_tcgets-nt.c
similarity index 100%
rename from libc/calls/ioctl-tcgets-nt.c
rename to libc/calls/ioctl_tcgets-nt.c
diff --git a/libc/calls/ioctl-tcgets.c b/libc/calls/ioctl_tcgets.c
similarity index 100%
rename from libc/calls/ioctl-tcgets.c
rename to libc/calls/ioctl_tcgets.c
diff --git a/libc/calls/ioctl-tcsets-nt.c b/libc/calls/ioctl_tcsets-nt.c
similarity index 100%
rename from libc/calls/ioctl-tcsets-nt.c
rename to libc/calls/ioctl_tcsets-nt.c
diff --git a/libc/calls/ioctl-tcsets.c b/libc/calls/ioctl_tcsets.c
similarity index 100%
rename from libc/calls/ioctl-tcsets.c
rename to libc/calls/ioctl_tcsets.c
diff --git a/libc/calls/ioctl-tiocgwinsz-nt.c b/libc/calls/ioctl_tiocgwinsz-nt.c
similarity index 100%
rename from libc/calls/ioctl-tiocgwinsz-nt.c
rename to libc/calls/ioctl_tiocgwinsz-nt.c
diff --git a/libc/calls/ioctl-tiocgwinsz.c b/libc/calls/ioctl_tiocgwinsz.c
similarity index 100%
rename from libc/calls/ioctl-tiocgwinsz.c
rename to libc/calls/ioctl_tiocgwinsz.c
diff --git a/libc/calls/ioctl-tiocswinsz-nt.c b/libc/calls/ioctl_tiocswinsz-nt.c
similarity index 100%
rename from libc/calls/ioctl-tiocswinsz-nt.c
rename to libc/calls/ioctl_tiocswinsz-nt.c
diff --git a/libc/calls/ioctl-tiocswinsz.c b/libc/calls/ioctl_tiocswinsz.c
similarity index 100%
rename from libc/calls/ioctl-tiocswinsz.c
rename to libc/calls/ioctl_tiocswinsz.c
diff --git a/libc/calls/struct/sockaddr6.h b/libc/calls/struct/sockaddr6.h
new file mode 100644
index 000000000..333135def
--- /dev/null
+++ b/libc/calls/struct/sockaddr6.h
@@ -0,0 +1,22 @@
+#ifndef COSMOPOLITAN_LIBC_CALLS_STRUCT_SOCKADDR6_H_
+#define COSMOPOLITAN_LIBC_CALLS_STRUCT_SOCKADDR6_H_
+#if !(__ASSEMBLER__ + __LINKER__ + 0)
+
+struct in6_addr {
+  union {
+    uint8_t s6_addr[16];
+    uint16_t s6_addr16[8];
+    uint32_t s6_addr32[4];
+  };
+};
+
+struct sockaddr_in6 { /* Linux+NT ABI */
+  uint16_t sin6_family;
+  uint16_t sin6_port;
+  uint32_t sin6_flowinfo;
+  struct in6_addr sin6_addr;
+  uint32_t sin6_scope_id; /* rfc2553 */
+};
+
+#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
+#endif /* COSMOPOLITAN_LIBC_CALLS_STRUCT_SOCKADDR6_H_ */
diff --git a/libc/dns/getnameinfo.c b/libc/dns/getnameinfo.c
index ef8af10d8..3cbbc860c 100644
--- a/libc/dns/getnameinfo.c
+++ b/libc/dns/getnameinfo.c
@@ -33,6 +33,7 @@
 #include "libc/dns/resolvconf.h"
 #include "libc/fmt/conv.h"
 #include "libc/fmt/fmt.h"
+#include "libc/fmt/itoa.h"
 #include "libc/mem/mem.h"
 #include "libc/sock/sock.h"
 #include "libc/str/str.h"
@@ -56,7 +57,7 @@
 int getnameinfo(const struct sockaddr *addr, socklen_t addrlen, char *name,
                 socklen_t namelen, char *service, socklen_t servicelen,
                 int flags) {
-  char rdomain[1 + sizeof "255.255.255.255.in-addr.arpa"];
+  char *p, rdomain[1 + sizeof "255.255.255.255.in-addr.arpa"];
   char info[512];
   int rc, port;
   uint8_t *ip;
@@ -71,7 +72,11 @@ int getnameinfo(const struct sockaddr *addr, socklen_t addrlen, char *name,
     return EAI_FAMILY;
 
   ip = (uint8_t *)&(((struct sockaddr_in *)addr)->sin_addr);
-  sprintf(rdomain, "%d.%d.%d.%d.in-addr.arpa", ip[3], ip[2], ip[1], ip[0]);
+  p = rdomain;
+  p += int64toarray_radix10(ip[3], p), *p++ = '.';
+  p += int64toarray_radix10(ip[2], p), *p++ = '.';
+  p += int64toarray_radix10(ip[1], p), *p++ = '.';
+  p += int64toarray_radix10(ip[0], p), stpcpy(p, ".in-addr.arpa");
   info[0] = '\0';
   if (name != NULL && namelen != 0) {
     if ((flags & NI_NUMERICHOST) && (flags & NI_NAMEREQD)) return EAI_NONAME;
diff --git a/libc/dns/resolvehostsreverse.c b/libc/dns/resolvehostsreverse.c
index c0eaf69e9..4fb77306e 100644
--- a/libc/dns/resolvehostsreverse.c
+++ b/libc/dns/resolvehostsreverse.c
@@ -44,8 +44,9 @@ int ResolveHostsReverse(const struct HostsTxt *ht, int af, const uint8_t *ip,
   if (af != AF_INET && af != AF_UNSPEC) return eafnosupport();
   for (i = 0; i < ht->entries.i; ++i) {
     if (READ32LE(ip) == READ32LE(ht->entries.p[i].ip)) {
-      snprintf(buf, bufsize, "%s", ht->strings.p + ht->entries.p[i].name);
-      return 1;
+      if (memccpy(buf, ht->strings.p + ht->entries.p[i].name, '\0', bufsize)) {
+        return 1;
+      }
     }
   }
   return 0;
diff --git a/libc/nt/iphlpapi.h b/libc/nt/iphlpapi.h
index ce9c31a6d..4b55fe345 100644
--- a/libc/nt/iphlpapi.h
+++ b/libc/nt/iphlpapi.h
@@ -29,7 +29,7 @@ COSMOPOLITAN_C_START_
 ╚────────────────────────────────────────────────────────────────────────────│*/
 
 uint32_t GetAdaptersAddresses(uint32_t Family, uint32_t Flags, void *Reserved,
-                              NtIpAdapterAddresses *AdapterAddresses,
+                              struct NtIpAdapterAddresses *AdapterAddresses,
                               uint32_t *SizePointer);
 
 COSMOPOLITAN_C_END_
diff --git a/libc/nt/struct/ipadapteraddresses.h b/libc/nt/struct/ipadapteraddresses.h
index a8d169ac5..2c5cc448d 100644
--- a/libc/nt/struct/ipadapteraddresses.h
+++ b/libc/nt/struct/ipadapteraddresses.h
@@ -1,10 +1,10 @@
 #ifndef COSMOPOLITAN_LIBC_NT_STRUCT_IP_ADAPTER_ADDRESSES_H_
 #define COSMOPOLITAN_LIBC_NT_STRUCT_IP_ADAPTER_ADDRESSES_H_
+#include "libc/nt/struct/guid.h"
 #include "libc/nt/winsock.h"
-#if !(__ASSEMBLER__ + __LINKER__ + 0)
-COSMOPOLITAN_C_START_
 
 /* Constants ----------------------------------------------------------- */
+
 #define kNtMaxAdapterAddressLength  8
 #define kNtMaxDnsSuffixStringLength 256
 #define kNtMaxDhcpv6DuidLength      130
@@ -37,245 +37,167 @@ COSMOPOLITAN_C_START_
 #define kNtIfTypeTunnel            131
 #define kNtIfTypeIeee1394          144 /* firewire */
 
-/* Enums --------------------------------------------------------------- */
-typedef enum {
-  kNtIpPrefixOriginOther,
-  kNtIpPrefixOriginManual,
-  kNtIpPrefixOriginWellKnown,
-  kNtIpPrefixOriginDhcp,
-  kNtIpPrefixOriginRouterAdvertisement,
-  kNtIpPrefixOriginUnchanged
-} NtPrefixOrigin;
+#define kNtIpAdapterDdnsEnabled             0x0001
+#define kNtIpAdapterRegisterAdapterSuffix   0x0002
+#define kNtIpAdapterDhcpv4Enabled           0x0004
+#define kNtIpAdapterReceiveOnly             0x0008
+#define kNtIpAdapterNoMulticast             0x0010
+#define kNtIpAdapterIpv6OtherStatefulConfig 0x0020
+#define kNtIpAdapterNetbiosOverTcpipEnabled 0x0040
+#define kNtIpAdapterIpv4Enabled             0x0080
+#define kNtIpAdapterIpv6Enabled             0x0100
+#define kNtIpAdapterIpv6Managed             0x0200
 
-typedef enum {
-  kNtNlsoOther,
-  kNtNlsoManual,
-  kNtNlsoWellKnown,
-  kNtNlsoDhcp,
-  kNtNlsoLinkLayerAddress,
-  kNtNlsoRandom,
-  kNtIpSuffixOriginOther,
-  kNtIpSuffixOriginManual,
-  kNtIpSuffixOriginWellKnown,
-  kNtIpSuffixOriginDhcp,
-  kNtIpSuffixOriginLinkLayerAddress,
-  kNtIpSuffixOriginRandom,
-  kNtIpSuffixOriginUnchanged
-} NtSuffixOrigin;
+#define kNtIpPrefixOriginOther               0
+#define kNtIpPrefixOriginManual              1
+#define kNtIpPrefixOriginWellKnown           2
+#define kNtIpPrefixOriginDhcp                3
+#define kNtIpPrefixOriginRouterAdvertisement 4
+#define kNtIpPrefixOriginUnchanged           16
 
-typedef enum {
-  kNtNldsInvalid,
-  kNtNldsTentative,
-  kNtNldsDuplicate,
-  kNtNldsDeprecated,
-  kNtNldsPreferred,
-  kNtIpDadStateInvalid,
-  kNtIpDadStateTentative,
-  kNtIpDadStateDuplicate,
-  kNtIpDadStateDeprecated,
-  kNtIpDadStatePreferred
-} NtDadState;
+#define kNtIpSuffixOriginOther            0
+#define kNtIpSuffixOriginManual           1
+#define kNtIpSuffixOriginWellKnown        2
+#define kNtIpSuffixOriginDhcp             3
+#define kNtIpSuffixOriginLinkLayerAddress 4
+#define kNtIpSuffixOriginRandom           5
+#define kNtIpSuffixOriginUnchanged        16
 
-typedef enum {
-  kNtIfOperStatusUp = 1,
-  kNtIfOperStatusDown,
-  kNtIfOperStatusTesting,
-  kNtIfOperStatusUnknown,
-  kNtIfOperStatusDormant,
-  kNtIfOperStatusNotPresent,
-  kNtIfOperStatusLowerLayerDown
-} NtIfOperStatus;
+#define kNtIpDadStateInvalid    0
+#define kNtIpDadStateTentative  1
+#define kNtIpDadStateDuplicate  2
+#define kNtIpDadStateDeprecated 3
+#define kNtIpDadStatePreferred  4
 
-typedef enum {
-  kNtNetIfConnectionDedicated = 1,
-  kNtNetIfConnectionPassive = 2,
-  kNtNetIfConnectionDemand = 3,
-  kNtNetIfConnectionMaximum = 4
-} NtNetIfConnectionType;
+#define kNtIfOperStatusUp             1
+#define kNtIfOperStatusDown           2
+#define kNtIfOperStatusTesting        3
+#define kNtIfOperStatusUnknown        4
+#define kNtIfOperStatusDormant        5
+#define kNtIfOperStatusNotPresent     6
+#define kNtIfOperStatusLowerLayerDown 7
 
-typedef enum {
-  kNtTunnelTypeNone = 0,
-  kNtTunnelTypeOther = 1,
-  kNtTunnelTypeDirect = 2,
-  kNtTunnelType6to4 = 11,
-  kNtTunnelTypeIsatap = 13,
-  kNtTunnelTypeTeredo = 14,
-  kNtTunnelTypeIphttps = 15
-} NtTunnelType;
+#define kNtNetIfConnectionDedicated 1
+#define kNtNetIfConnectionPassive   2
+#define kNtNetIfConnectionDemand    3
+#define kNtNetIfConnectionMaximum   4
+
+#define kNtTunnelTypeNone    0
+#define kNtTunnelTypeOther   1
+#define kNtTunnelTypeDirect  2
+#define kNtTunnelType6to4    11
+#define kNtTunnelTypeIsatap  13
+#define kNtTunnelTypeTeredo  14
+#define kNtTunnelTypeIphttps 15
+
+#if !(__ASSEMBLER__ + __LINKER__ + 0)
+COSMOPOLITAN_C_START_
 
 /* Inner Types --------------------------------------------------------- */
-typedef struct _NtIpAdapterUnicastAddress {
-  union {
-    uint64_t Alignment;
-    struct {
-      uint32_t Length;
-      uint32_t Flags;
-    };
-  };
-  struct _NtIpAdapterUnicastAddress *Next;
+
+struct NtIpAdapterUnicastAddress {
+  uint32_t Length;
+  uint32_t Flags;
+  struct NtIpAdapterUnicastAddress *Next;
   struct NtSocketAddress Address;
-  NtPrefixOrigin PrefixOrigin;
-  NtSuffixOrigin SuffixOrigin;
-  NtDadState DadState;
+  uint32_t PrefixOrigin; /* kNtIpPrefixOrigin... */
+  uint32_t SuffixOrigin; /* kNtIpSuffixOrigin... */
+  uint32_t DadState;     /* kNtIpDadState... */
   uint32_t ValidLifetime;
   uint32_t PreferredLifetime;
   uint32_t LeaseLifetime;
   uint8_t OnLinkPrefixLength;
-} NtIpAdapterUnicastAddress;
+};
 
-typedef struct NtIpAdapterAnycastAddress {
-  union {
-    uint64_t Alignment;
-    struct {
-      uint32_t Length;
-      uint32_t Flags;
-    };
-  };
-  struct _NtIpAdapterAnycastAddress *Next;
+struct NtIpAdapterAnycastAddress {
+  uint32_t Length;
+  uint32_t Flags;
+  struct NtIpAdapterAnycastAddress *Next;
   struct NtSocketAddress Address;
-} NtIpAdapterAnycastAddress;
+};
 
-typedef struct NtIpAdapterMulticastAddress {
-  union {
-    uint64_t Alignment;
-    struct {
-      uint32_t Length;
-      uint32_t Flags;
-    };
-  };
-  struct _NtIpAdapterMulticastAddress *Next;
+struct NtIpAdapterMulticastAddress {
+  uint32_t Length;
+  uint32_t Flags;
+  struct NtIpAdapterMulticastAddress *Next;
   struct NtSocketAddress Address;
-} NtIpAdapterMulticastAddress;
+};
 
-typedef struct _NtIpAdapterDnsServerAddress {
-  union {
-    uint64_t Alignment;
-    struct {
-      uint32_t Length;
-      uint32_t Reserved;
-    };
-  };
-  struct _NtIpAdapterDnsServerAddress *Next;
+struct NtIpAdapterDnsServerAddress {
+  uint32_t Length;
+  uint32_t Reserved;
+  struct NtIpAdapterDnsServerAddress *Next;
   struct NtSocketAddress Address;
-} NtIpAdapterDnsServerAddress;
+};
 
-typedef struct _NtIpAdapterPrefix {
-  union {
-    uint64_t Alignment;
-    struct {
-      uint32_t Length;
-      uint32_t Flags;
-    };
-  };
-  struct _NtIpAdapterPrefix *Next;
+struct NtIpAdapterPrefix {
+  uint32_t Length;
+  uint32_t Flags;
+  struct NtIpAdapterPrefix *Next;
   struct NtSocketAddress Address;
   uint32_t PrefixLength;
-} NtIpAdapterPrefix;
+};
 
-typedef struct _NtIpAdapterWinsServerAddress {
-  union {
-    uint64_t Alignment;
-    struct {
-      uint32_t Length;
-      uint32_t Reserved;
-    };
-  };
-  struct _NtIpAdapterWinsServerAddress *Next;
+struct NtIpAdapterWinsServerAddress {
+  uint32_t Length;
+  uint32_t Reserved;
+  struct NtIpAdapterWinsServerAddress *Next;
   struct NtSocketAddress Address;
-} NtIpAdapterWinsServerAddress;
+};
 
-typedef struct _NtIpAdapterGatewayAddress {
-  union {
-    uint64_t Alignment;
-    struct {
-      uint32_t Length;
-      uint32_t Reserved;
-    };
-  };
-  struct _NtIpAdapterGatewayAddress *Next;
+struct NtIpAdapterGatewayAddress {
+  uint32_t Length;
+  uint32_t Reserved;
+  struct NtIpAdapterGatewayAddress *Next;
   struct NtSocketAddress Address;
-} NtIpAdapterGatewayAddress;
+};
 
-typedef struct _NtGUID {
-  uint32_t Data1;
-  uint16_t Data2;
-  uint16_t Data3;
-  uint8_t Data4[8];
-} NtGUID;
-
-typedef union _NtNetLUID {
-  uint64_t Value;
-  struct {
-    uint64_t Reserved : 24;
-    uint64_t NetLuidIndex : 24;
-    uint64_t IfType : 16;
-  } Info;
-} NtNetLUID;
-
-typedef struct _NtIpAdapterDnsSuffix {
-  struct _NtIpAdapterDnsSuffix *Next;
+struct NtIpAdapterDnsSuffix {
+  struct NtIpAdapterDnsSuffix *Next;
   uint16_t String[kNtMaxDnsSuffixStringLength];
-} NtIpAdapterDnsSuffix;
+};
 
 /* Top level ----------------------------------------------------------- */
-typedef struct _NtIpAdapterAddresses {
-  union {
-    uint64_t Alignment;
-    struct {
-      uint32_t Length;
-      uint32_t IfIndex;
-    };
-  };
-  struct _NtIpAdapterAddresses *Next;
+
+struct NtIpAdapterAddresses {
+  uint32_t Length;
+  uint32_t IfIndex;
+  struct NtIpAdapterAddresses *Next;
   char *AdapterName;
-  NtIpAdapterUnicastAddress *FirstUnicastAddress;
-  NtIpAdapterAnycastAddress *FirstAnycastAddress;
-  NtIpAdapterMulticastAddress *FirstMulticastAddress;
-  NtIpAdapterDnsServerAddress *FirstDnsServerAddress;
+  struct NtIpAdapterUnicastAddress *FirstUnicastAddress;
+  struct NtIpAdapterAnycastAddress *FirstAnycastAddress;
+  struct NtIpAdapterMulticastAddress *FirstMulticastAddress;
+  struct NtIpAdapterDnsServerAddress *FirstDnsServerAddress;
   uint16_t *DnsSuffix;
   uint16_t *Description;
   uint16_t *FriendlyName;
   uint8_t PhysicalAddress[kNtMaxAdapterAddressLength];
   uint32_t PhysicalAddressLength;
-  union {
-    uint32_t Flags;
-    struct {
-      uint32_t DdnsEnabled : 1;
-      uint32_t RegisterAdapterSuffix : 1;
-      uint32_t Dhcpv4Enabled : 1;
-      uint32_t ReceiveOnly : 1;
-      uint32_t NoMulticast : 1;
-      uint32_t Ipv6OtherStatefulConfig : 1;
-      uint32_t NetbiosOverTcpipEnabled : 1;
-      uint32_t Ipv4Enabled : 1;
-      uint32_t Ipv6Enabled : 1;
-      uint32_t Ipv6ManagedAddressConfigurationSupported : 1;
-    };
-  };
+  uint32_t Flags; /* kNtIpAdapter... */
   uint32_t Mtu;
-  uint32_t IfType;
-  NtIfOperStatus OperStatus;
+  uint32_t IfType;     /* kNtIfType... */
+  uint32_t OperStatus; /* kNtIfOperStatus... */
   uint32_t Ipv6IfIndex;
   uint32_t ZoneIndices[16];
-  NtIpAdapterPrefix *FirstPrefix;
+  struct NtIpAdapterPrefix *FirstPrefix;
   uint64_t TransmitLinkSpeed;
   uint64_t ReceiveLinkSpeed;
-  NtIpAdapterWinsServerAddress *FirstWinsServerAddress;
-  NtIpAdapterGatewayAddress *FirstGatewayAddress;
+  struct NtIpAdapterWinsServerAddress *FirstWinsServerAddress;
+  struct NtIpAdapterGatewayAddress *FirstGatewayAddress;
   uint32_t Ipv4Metric;
   uint32_t Ipv6Metric;
-  NtNetLUID Luid;
+  uint64_t Luid; /* reserved(24bits),NetLuidIndex(24b),IfType(16b) */
   struct NtSocketAddress Dhcpv4Server;
   uint32_t CompartmentId;
-  NtGUID NetworkGuid;
-  NtNetIfConnectionType ConnectionType;
-  NtTunnelType TunnelType;
+  struct NtGuid NetworkGuid;
+  uint32_t ConnectionType; /* kNtNetIfConnection... */
+  uint32_t TunnelType;     /* kNtTunnelType... */
   struct NtSocketAddress Dhcpv6Server;
   uint8_t Dhcpv6ClientDuid[kNtMaxDhcpv6DuidLength];
   uint32_t Dhcpv6ClientDuidLength;
   uint32_t Dhcpv6Iaid;
-  NtIpAdapterDnsSuffix *FirstDnsSuffix;
-} NtIpAdapterAddresses;
+  struct NtIpAdapterDnsSuffix *FirstDnsSuffix;
+};
 
 COSMOPOLITAN_C_END_
 #endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
diff --git a/libc/sock/gethostips.c b/libc/sock/gethostips.c
index dd85e9a23..f0fa33a4a 100644
--- a/libc/sock/gethostips.c
+++ b/libc/sock/gethostips.c
@@ -59,8 +59,8 @@ static uint32_t *GetUnixIps(void) {
 
 static textwindows uint32_t *GetWindowsIps(void) {
   uint32_t i, z, n, rc, *a;
-  NtIpAdapterUnicastAddress *u;
-  NtIpAdapterAddresses *p, *ifaces;
+  struct NtIpAdapterUnicastAddress *u;
+  struct NtIpAdapterAddresses *p, *ifaces;
   i = 0;
   z = 15000;
   do {
diff --git a/libc/sock/internal.h b/libc/sock/internal.h
index 94ae89e19..49b3442de 100644
--- a/libc/sock/internal.h
+++ b/libc/sock/internal.h
@@ -53,45 +53,8 @@ struct sockaddr_un_bsd {
   char sun_path[108];
 };
 
-/* -----------------------------------------------------------------------------------
- * ioctl SIOCGIFCONF & others:
- *
- * BSD has a different structure. All the ioctl will adjust to use
- * the ifreq with the ifreq_bsd
- */
-struct ifreq_bsd {
-  union {
-    char ifrn_name[IFNAMSIZ];
-  } ifr_ifrn;
-
-  union {
-    /* Right now we only list the structures used by the few ioctl that are
-     * supported by Cosmopolitan. Add your own definition here if you need
-     * a particular ioctl that requires polyfill for BSD
-     */
-    struct  sockaddr_bsd ifru_addr;
-    struct  sockaddr_bsd ifru_netmask;
-    struct  sockaddr_bsd ifru_dstaddr;
-    struct  sockaddr_bsd ifru_broadaddr;
-    short   ifru_flags;
-    char    ifru_pad[16];   /* used as padding */
-  } ifr_ifru;
-};
-
-#pragma pack(4)
-struct ifconf_bsd {
-  uint32_t ifc_len;            /* size of buffer   */
-  union {
-    char *ifcu_buf;
-    struct ifreq_bsd *ifcu_req;
-  } ifc_ifcu;
-};
-#pragma pack()
-
-
 /* ------------------------------------------------------------------------------------*/
 
-
 struct SockFd {
   int family;
   int type;
diff --git a/libc/sock/sock.h b/libc/sock/sock.h
index c196ae08c..6eb96b9ca 100644
--- a/libc/sock/sock.h
+++ b/libc/sock/sock.h
@@ -102,11 +102,11 @@ struct ifconf {
 #define IFHWADDRLEN 6
 #define IF_NAMESIZE 16
 #define IFNAMSIZ    IF_NAMESIZE
+
 struct ifreq {
   union {
     char ifrn_name[IFNAMSIZ]; /* Interface name, e.g. "en0".  */
   } ifr_ifrn;
-
   union {
     struct sockaddr ifru_addr;      /* SIOCGIFADDR */
     struct sockaddr ifru_dstaddr;   /* SIOCGIFDSTADDR */
@@ -128,8 +128,6 @@ struct ifreq {
 #define _IOT_ifreq_short _IOT(_IOTS(char), IFNAMSIZ, _IOTS(short), 1, 0, 0)
 #define _IOT_ifreq_int   _IOT(_IOTS(char), IFNAMSIZ, _IOTS(int), 1, 0, 0)
 
-#define IFF_UP (1 << 0)
-
 const char *inet_ntop(int, const void *, char *, uint32_t);
 int inet_aton(const char *, struct in_addr *);
 int inet_pton(int, const char *, void *);
diff --git a/libc/sysv/consts.sh b/libc/sysv/consts.sh
index 8ec8a2c76..c5723fd34 100755
--- a/libc/sysv/consts.sh
+++ b/libc/sysv/consts.sh
@@ -1497,14 +1497,18 @@ syscon	modem	TIOCMODG				0			0x40047403		0			0x4004746a		0x4004746a		-1			# wut
 syscon	modem	TIOCMODS				0			0x80047404		0			0x8004746d		0x8004746d		-1			# wut
 syscon	modem	TIOCMSDTRWAIT				0			0x8004745b		0x8004745b		0			0			-1			# wut
 
-syscon	iff	IFF_BROADCAST				2			2			2			2			2			2			# consensus
-syscon	iff	IFF_LOOPBACK				8			8			8			8			8			4			# unix consensus
-syscon	iff	IFF_MULTICAST				0x1000			0x8000			0x8000			0x8000			0x8000			0x10			# bsd consensus
-syscon	iff	IFF_ALLMULTI				0x0200			0x0200			0x0200			0x0200			0x0200			0			# unix consensus
-syscon	iff	IFF_DEBUG				4			4			4			4			4			0			# unix consensus
-syscon	iff	IFF_NOARP				0x80			0x80			0x80			0x80			0x80			0			# unix consensus
-syscon	iff	IFF_POINTOPOINT				0x10			0x10			0x10			0x10			0x10			0			# unix consensus
-syscon	iff	IFF_PROIFF				0x0100			0x0100			0x0100			0x0100			0x0100			0			# unix consensus
+#	ioctl(SIOCGIFFLAGS) Network Interface Flags
+#
+#	group	name					GNU/Systemd		XNU's Not UNIX!		FreeBSD			OpenBSD			NetBSD			The New Technology	Commentary
+syscon	iff	IFF_UP					1			1			1			1			1			1			# unix consensus
+syscon	iff	IFF_BROADCAST				2			2			2			2			2			2			# valid broadcast address set; consensus
+syscon	iff	IFF_DEBUG				4			4			4			4			4			4			# faked nt; consensus
+syscon	iff	IFF_LOOPBACK				8			8			8			8			8			4			# is loopback device; consensus
+syscon	iff	IFF_MULTICAST				0x1000			0x8000			0x8000			0x8000			0x8000			0x1000			# supports multicast; faked nt; bsd consensus
+syscon	iff	IFF_ALLMULTI				0x0200			0x0200			0x0200			0x0200			0x0200			0x0200			# receive all multicast packets; faked nt; unix consensus
+syscon	iff	IFF_NOARP				0x80			0x80			0x80			0x80			0x80			0x80			# faked nt as linux; unix consensus
+syscon	iff	IFF_POINTOPOINT				0x10			0x10			0x10			0x10			0x10			0x10			# point-to-point; faked nt as linux; unix consensus
+syscon	iff	IFF_PROMISC				0x100			0x100			0x100			0x100			0x100			0			# in packet capture mode; unix consensus
 syscon	iff	IFF_RUNNING				0x40			0x40			0x40			0x40			0x40			0			# unix consensus
 syscon	iff	IFF_NOTRAILERS				0x20			0x20			0			0			0			0
 syscon	iff	IFF_AUTOMEDIA				0x4000			0			0			0			0			0
diff --git a/libc/sysv/consts/IFF_ALLMULTI.S b/libc/sysv/consts/IFF_ALLMULTI.S
index c9f5b9b6b..2857d6be1 100644
--- a/libc/sysv/consts/IFF_ALLMULTI.S
+++ b/libc/sysv/consts/IFF_ALLMULTI.S
@@ -1,2 +1,2 @@
 #include "libc/sysv/consts/syscon.internal.h"
-.syscon iff,IFF_ALLMULTI,0x0200,0x0200,0x0200,0x0200,0x0200,0
+.syscon iff,IFF_ALLMULTI,0x0200,0x0200,0x0200,0x0200,0x0200,0x0200
diff --git a/libc/sysv/consts/IFF_DEBUG.S b/libc/sysv/consts/IFF_DEBUG.S
index 687689aea..0e811d455 100644
--- a/libc/sysv/consts/IFF_DEBUG.S
+++ b/libc/sysv/consts/IFF_DEBUG.S
@@ -1,2 +1,2 @@
 #include "libc/sysv/consts/syscon.internal.h"
-.syscon iff,IFF_DEBUG,4,4,4,4,4,0
+.syscon iff,IFF_DEBUG,4,4,4,4,4,4
diff --git a/libc/sysv/consts/IFF_MULTICAST.S b/libc/sysv/consts/IFF_MULTICAST.S
index 75cecbeca..8f158e689 100644
--- a/libc/sysv/consts/IFF_MULTICAST.S
+++ b/libc/sysv/consts/IFF_MULTICAST.S
@@ -1,2 +1,2 @@
 #include "libc/sysv/consts/syscon.internal.h"
-.syscon iff,IFF_MULTICAST,0x1000,0x8000,0x8000,0x8000,0x8000,0x10
+.syscon iff,IFF_MULTICAST,0x1000,0x8000,0x8000,0x8000,0x8000,0x1000
diff --git a/libc/sysv/consts/IFF_NOARP.S b/libc/sysv/consts/IFF_NOARP.S
index 3a5ff841f..bffe6175c 100644
--- a/libc/sysv/consts/IFF_NOARP.S
+++ b/libc/sysv/consts/IFF_NOARP.S
@@ -1,2 +1,2 @@
 #include "libc/sysv/consts/syscon.internal.h"
-.syscon iff,IFF_NOARP,0x80,0x80,0x80,0x80,0x80,0
+.syscon iff,IFF_NOARP,0x80,0x80,0x80,0x80,0x80,0x80
diff --git a/libc/sysv/consts/IFF_POINTOPOINT.S b/libc/sysv/consts/IFF_POINTOPOINT.S
index 6924ed6ac..894fe8d56 100644
--- a/libc/sysv/consts/IFF_POINTOPOINT.S
+++ b/libc/sysv/consts/IFF_POINTOPOINT.S
@@ -1,2 +1,2 @@
 #include "libc/sysv/consts/syscon.internal.h"
-.syscon iff,IFF_POINTOPOINT,0x10,0x10,0x10,0x10,0x10,0
+.syscon iff,IFF_POINTOPOINT,0x10,0x10,0x10,0x10,0x10,0x10
diff --git a/libc/sysv/consts/IFF_PROIFF.S b/libc/sysv/consts/IFF_PROIFF.S
deleted file mode 100644
index 1aad79521..000000000
--- a/libc/sysv/consts/IFF_PROIFF.S
+++ /dev/null
@@ -1,2 +0,0 @@
-#include "libc/sysv/consts/syscon.internal.h"
-.syscon iff,IFF_PROIFF,0x0100,0x0100,0x0100,0x0100,0x0100,0
diff --git a/libc/sysv/consts/IFF_PROMISC.S b/libc/sysv/consts/IFF_PROMISC.S
new file mode 100644
index 000000000..be1f05540
--- /dev/null
+++ b/libc/sysv/consts/IFF_PROMISC.S
@@ -0,0 +1,2 @@
+#include "libc/sysv/consts/syscon.internal.h"
+.syscon iff,IFF_PROMISC,0x100,0x100,0x100,0x100,0x100,0
diff --git a/libc/sysv/consts/IFF_UP.S b/libc/sysv/consts/IFF_UP.S
new file mode 100644
index 000000000..f58b798fe
--- /dev/null
+++ b/libc/sysv/consts/IFF_UP.S
@@ -0,0 +1,2 @@
+#include "libc/sysv/consts/syscon.internal.h"
+.syscon iff,IFF_UP,1,1,1,1,1,1
diff --git a/libc/sysv/consts/iff.h b/libc/sysv/consts/iff.h
index da4f17c03..22d3fa5f8 100644
--- a/libc/sysv/consts/iff.h
+++ b/libc/sysv/consts/iff.h
@@ -1,26 +1,9 @@
 #ifndef COSMOPOLITAN_LIBC_SYSV_CONSTS_IFF_H_
 #define COSMOPOLITAN_LIBC_SYSV_CONSTS_IFF_H_
-#include "libc/runtime/symbolic.h"
-
-#define IFF_ALLMULTI SYMBOLIC(IFF_ALLMULTI)
-#define IFF_AUTOMEDIA SYMBOLIC(IFF_AUTOMEDIA)
-#define IFF_BROADCAST SYMBOLIC(IFF_BROADCAST)
-#define IFF_DEBUG SYMBOLIC(IFF_DEBUG)
-#define IFF_DYNAMIC SYMBOLIC(IFF_DYNAMIC)
-#define IFF_LOOPBACK SYMBOLIC(IFF_LOOPBACK)
-#define IFF_MASTER SYMBOLIC(IFF_MASTER)
-#define IFF_MULTICAST SYMBOLIC(IFF_MULTICAST)
-#define IFF_NOARP SYMBOLIC(IFF_NOARP)
-#define IFF_NOTRAILERS SYMBOLIC(IFF_NOTRAILERS)
-#define IFF_POINTOPOINT SYMBOLIC(IFF_POINTOPOINT)
-#define IFF_PORTSEL SYMBOLIC(IFF_PORTSEL)
-#define IFF_PROMISC SYMBOLIC(IFF_PROMISC)
-#define IFF_RUNNING SYMBOLIC(IFF_RUNNING)
-#define IFF_SLAVE SYMBOLIC(IFF_SLAVE)
-
 #if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 
+extern const long IFF_UP;
 extern const long IFF_ALLMULTI;
 extern const long IFF_AUTOMEDIA;
 extern const long IFF_BROADCAST;
@@ -39,4 +22,22 @@ extern const long IFF_SLAVE;
 
 COSMOPOLITAN_C_END_
 #endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
+
+#define IFF_UP          1
+#define IFF_BROADCAST   2
+#define IFF_DEBUG       4
+#define IFF_LOOPBACK    8
+#define IFF_ALLMULTI    IFF_ALLMULTI
+#define IFF_AUTOMEDIA   IFF_AUTOMEDIA
+#define IFF_DYNAMIC     IFF_DYNAMIC
+#define IFF_MASTER      IFF_MASTER
+#define IFF_MULTICAST   IFF_MULTICAST
+#define IFF_NOARP       IFF_NOARP
+#define IFF_NOTRAILERS  IFF_NOTRAILERS
+#define IFF_POINTOPOINT IFF_POINTOPOINT
+#define IFF_PORTSEL     IFF_PORTSEL
+#define IFF_PROMISC     IFF_PROMISC
+#define IFF_RUNNING     IFF_RUNNING
+#define IFF_SLAVE       IFF_SLAVE
+
 #endif /* COSMOPOLITAN_LIBC_SYSV_CONSTS_IFF_H_ */
diff --git a/test/libc/calls/ioctl_siocgifconf_test.c b/test/libc/calls/ioctl_siocgifconf_test.c
new file mode 100644
index 000000000..15c3b5358
--- /dev/null
+++ b/test/libc/calls/ioctl_siocgifconf_test.c
@@ -0,0 +1,70 @@
+/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
+│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
+╞══════════════════════════════════════════════════════════════════════════════╡
+│ Copyright 2021 Justine Alexandra Roberts Tunney                              │
+│                                                                              │
+│ Permission to use, copy, modify, and/or distribute this software for         │
+│ any purpose with or without fee is hereby granted, provided that the         │
+│ above copyright notice and this permission notice appear in all copies.      │
+│                                                                              │
+│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
+│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
+│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
+│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
+│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
+│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
+│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
+│ PERFORMANCE OF THIS SOFTWARE.                                                │
+╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/bits/bits.h"
+#include "libc/calls/calls.h"
+#include "libc/calls/internal.h"
+#include "libc/calls/ioctl.h"
+#include "libc/log/check.h"
+#include "libc/log/log.h"
+#include "libc/mem/mem.h"
+#include "libc/runtime/gc.internal.h"
+#include "libc/sock/sock.h"
+#include "libc/stdio/stdio.h"
+#include "libc/sysv/consts/af.h"
+#include "libc/sysv/consts/ipproto.h"
+#include "libc/sysv/consts/sio.h"
+#include "libc/sysv/consts/sock.h"
+#include "libc/testlib/testlib.h"
+
+TEST(ioctl_siocgifconf, test) {
+  size_t n;
+  char *data;
+  int socketfd;
+  struct ifreq *ifr;
+  struct ifconf conf;
+  char addrbuf[1024];
+  uint32_t ip, netmask;
+  bool foundloopback = false;
+  data = gc(malloc((n = 4096)));
+  ASSERT_NE(-1, (socketfd = socket(AF_INET, SOCK_DGRAM, 0)));
+  conf.ifc_buf = data;
+  conf.ifc_len = n;
+  ASSERT_NE(-1, ioctl(socketfd, SIOCGIFCONF, &conf));
+  for (ifr = (struct ifreq *)data; (char *)ifr < data + conf.ifc_len; ++ifr) {
+    if (ifr->ifr_addr.sa_family != AF_INET) continue;
+    ip = ntohl(((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr.s_addr);
+    EXPECT_NE(-1, ioctl(socketfd, SIOCGIFNETMASK, ifr));
+    netmask = ntohl(((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr.s_addr);
+#if 0
+    fprintf(stderr,
+            "%s %x %d\n"
+            "  ip      %hhu.%hhu.%hhu.%hhu\n"
+            "  netmask %hhu.%hhu.%hhu.%hhu\n"
+            "\n",
+            ifr->ifr_name, ip, ifr->ifr_addr.sa_family, ip >> 24, ip >> 16,
+            ip >> 8, ip, netmask >> 24, netmask >> 16, netmask >> 8, netmask);
+#endif
+    if (ip == 0x7f000001) {
+      foundloopback = true;
+      EXPECT_EQ(0xFF000000, netmask);
+    }
+  }
+  EXPECT_TRUE(foundloopback);
+  ASSERT_NE(-1, close(socketfd));
+}
diff --git a/test/libc/calls/test.mk b/test/libc/calls/test.mk
index 9e24ded53..0ac4572fe 100644
--- a/test/libc/calls/test.mk
+++ b/test/libc/calls/test.mk
@@ -25,6 +25,7 @@ TEST_LIBC_CALLS_CHECKS =				\
 
 TEST_LIBC_CALLS_DIRECTDEPS =				\
 	LIBC_CALLS					\
+	LIBC_SOCK					\
 	LIBC_FMT					\
 	LIBC_INTRIN					\
 	LIBC_LOG					\
@@ -32,6 +33,7 @@ TEST_LIBC_CALLS_DIRECTDEPS =				\
 	LIBC_NEXGEN32E					\
 	LIBC_RAND					\
 	LIBC_STDIO					\
+	LIBC_SYSV_CALLS					\
 	LIBC_RUNTIME					\
 	LIBC_STR					\
 	LIBC_STUBS					\
diff --git a/test/libc/release/clang.sh b/test/libc/release/clang.sh
index 0c891383e..5cb899b4e 100755
--- a/test/libc/release/clang.sh
+++ b/test/libc/release/clang.sh
@@ -12,6 +12,7 @@ if CLANG=$(command -v clang); then
       -fno-pie                                        \
       -nostdlib                                       \
       -nostdinc                                       \
+      -fuse-ld=lld                                    \
       -mno-red-zone                                   \
       -Wl,-T,o/$MODE/ape/ape.lds                      \
       -include o/cosmopolitan.h                       \
diff --git a/test/libc/release/lld.sh b/test/libc/release/lld.sh
new file mode 100755
index 000000000..c6656f433
--- /dev/null
+++ b/test/libc/release/lld.sh
@@ -0,0 +1,27 @@
+#!/bin/sh
+#-*-mode:sh;indent-tabs-mode:nil;tab-width:2;coding:utf-8-*-┐
+#───vi: set net ft=sh ts=2 sts=2 fenc=utf-8 :vi─────────────┘
+
+# TODO(jart): implement me
+
+if CLANG=$(command -v clang); then
+  $CLANG                                              \
+      -o o/$MODE/test/libc/release/smokeclang.com.dbg \
+      -Os                                             \
+      -Wall                                           \
+      -Werror                                         \
+      -static                                         \
+      -fno-pie                                        \
+      -nostdlib                                       \
+      -nostdinc                                       \
+      -mno-red-zone                                   \
+      -Wl,-T,o/$MODE/ape/ape.lds                      \
+      -include o/cosmopolitan.h                       \
+      test/libc/release/smoke.c                       \
+      o/$MODE/libc/crt/crt.o                          \
+      o/$MODE/ape/ape.o                               \
+      o/$MODE/cosmopolitan.a || exit
+  o/$MODE/test/libc/release/smokeclang.com.dbg || exit
+fi
+
+touch o/$MODE/test/libc/release/clang.ok
diff --git a/test/libc/release/test.mk b/test/libc/release/test.mk
index 872f9395d..b8b295cb2 100644
--- a/test/libc/release/test.mk
+++ b/test/libc/release/test.mk
@@ -125,6 +125,16 @@ o/$(MODE)/test/libc/release/clang.ok:				\
 		o/$(MODE)/cosmopolitan.a
 	@$(COMPILE) -ASHTEST -T$< $<
 
+o/$(MODE)/test/libc/release/lld.ok:				\
+		test/libc/release/lld.sh			\
+		test/libc/release/smoke.c			\
+		o/cosmopolitan.h				\
+		o/$(MODE)/ape/ape.lds				\
+		o/$(MODE)/libc/crt/crt.o			\
+		o/$(MODE)/ape/ape.o				\
+		o/$(MODE)/cosmopolitan.a
+	@$(COMPILE) -ASHTEST -T$< $<
+
 o/$(MODE)/test/libc/release/metal.ok:				\
 		test/libc/release/metal.sh			\
 		o/$(MODE)/examples/hello.com			\
@@ -148,5 +158,6 @@ o/$(MODE)/test/libc/release:					\
 		o/$(MODE)/test/libc/release/smokeansi.com	\
 		o/$(MODE)/test/libc/release/smokeansi.com.runs	\
 		o/$(MODE)/test/libc/release/clang.ok		\
+		o/$(MODE)/test/libc/release/lld.ok		\
 		o/$(MODE)/test/libc/release/emulate.ok		\
 		o/$(MODE)/test/libc/release/metal.ok
diff --git a/third_party/infozip/zip/zip.c b/third_party/infozip/zip/zip.c
index 216059129..86e526010 100644
--- a/third_party/infozip/zip/zip.c
+++ b/third_party/infozip/zip/zip.c
@@ -1433,7 +1433,7 @@ local void check_zipfile(zipname, zippath)
   int result;
 
   /* Tell picky compilers to shut up about unused variables */
-  zippath = zippath;
+  (void)zippath;
 
   if (unzip_path) {
     /* user gave us a path to some unzip (may not be UnZip) */
@@ -1798,7 +1798,7 @@ ZCONST char *zfn;
     char *prompt;
 
     /* Tell picky compilers to shut up about unused variables */
-    zfn = zfn;
+    (void)zfn;
 
     prompt = (modeflag == ZP_PW_VERIFY) ?
               "Verify password: " : "Enter password: ";
@@ -1817,7 +1817,7 @@ int size;
 ZCONST char *zfn;
 {
     /* Tell picky compilers to shut up about unused variables */
-    modeflag = modeflag; pwbuf = pwbuf; size = size; zfn = zfn;
+    (void)modeflag; (void)pwbuf; (void)size; (void)zfn;
 
     return ZE_LOGIC;    /* This function should never be called! */
 }
diff --git a/third_party/infozip/zip/zipfile.c b/third_party/infozip/zip/zipfile.c
index b4b22c825..81587071a 100644
--- a/third_party/infozip/zip/zipfile.c
+++ b/third_party/infozip/zip/zipfile.c
@@ -29,7 +29,9 @@
 #include "libc/str/str.h"
 #include "libc/fmt/fmt.h"
 
+#if defined(__GNUC__) && !defined(__llvm__)
 #pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#endif
 
 #ifdef VMS
 #  include "vms/vms.h"
diff --git a/third_party/mbedtls/getalertdescription.c b/third_party/mbedtls/getalertdescription.c
index d77149186..641418494 100644
--- a/third_party/mbedtls/getalertdescription.c
+++ b/third_party/mbedtls/getalertdescription.c
@@ -25,7 +25,7 @@
  * @see RFC5246 §7.2
  */
 const char *GetAlertDescription(unsigned char x) {
-  static char buf[4];
+  static char buf[21];
   switch (x) {
     case MBEDTLS_SSL_ALERT_MSG_CLOSE_NOTIFY: /* 0 */
       return "close_notify";
diff --git a/third_party/sqlite3/btree.c b/third_party/sqlite3/btree.c
index d5e9e0544..8a5f79d63 100644
--- a/third_party/sqlite3/btree.c
+++ b/third_party/sqlite3/btree.c
@@ -14,7 +14,10 @@
 ** Including a description of file format and an overview of operation.
 */
 #include "third_party/sqlite3/btreeInt.inc"
+
+#if defined(__GNUC__) && !defined(__llvm__)
 #pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#endif
 
 /* clang-format off */
 
diff --git a/third_party/sqlite3/sqlite3session.c b/third_party/sqlite3/sqlite3session.c
index 81edc3789..095cb12c8 100644
--- a/third_party/sqlite3/sqlite3session.c
+++ b/third_party/sqlite3/sqlite3session.c
@@ -3,7 +3,10 @@
 #include "libc/assert.h"
 #include "libc/str/str.h"
 #include "third_party/sqlite3/sqlite3session.inc"
+
+#if defined(__GNUC__) && !defined(__llvm__)
 #pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#endif
 
 #ifndef SQLITE_AMALGAMATION
 #include "third_party/sqlite3/sqliteInt.inc"
diff --git a/tool/net/redbean.c b/tool/net/redbean.c
index d4ead725e..dc5993ebf 100644
--- a/tool/net/redbean.c
+++ b/tool/net/redbean.c
@@ -646,11 +646,6 @@ static long FindRedirect(const char *s, size_t n) {
   return -1;
 }
 
-static wontreturn void CrashCertificate(const char *name, const char *path) {
-  fprintf(stderr, "error: failed to load %s: %s\n", name, path);
-  exit(1);
-}
-
 static void LogCertificate(const char *msg, mbedtls_x509_crt *cert) {
   char *s;
   size_t n;