Add a "fork" of musl as //fusl.

fusl/include/resolv.h

+#ifndef _RESOLV_H
+#define _RESOLV_H
+
+#include <stdint.h>
+#include <arpa/nameser.h>
+#include <netinet/in.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define MAXNS                   3
+#define MAXDFLSRCH              3
+#define MAXDNSRCH               6
+#define LOCALDOMAINPARTS        2
+
+#define RES_TIMEOUT             5
+#define MAXRESOLVSORT           10
+#define RES_MAXNDOTS            15
+#define RES_MAXRETRANS          30
+#define RES_MAXRETRY            5
+#define RES_DFLRETRY            2
+#define RES_MAXTIME             65535
+
+/* unused; purely for broken apps */
+typedef struct __res_state {
+        int retrans;
+        int retry;
+        unsigned long options;
+        int nscount;
+        struct sockaddr_in nsaddr_list[MAXNS];
+# define nsaddr nsaddr_list[0]
+        unsigned short id;
+        char *dnsrch[MAXDNSRCH+1];
+        char defdname[256];
+        unsigned long pfcode;
+        unsigned ndots:4;
+        unsigned nsort:4;
+        unsigned ipv6_unavail:1;
+        unsigned unused:23;
+        struct {
+                struct in_addr addr;
+                uint32_t mask;
+        } sort_list[MAXRESOLVSORT];
+        void *qhook;
+        void *rhook;
+        int res_h_errno;
+        int _vcsock;
+        unsigned _flags;
+        union {
+                char pad[52];
+                struct {
+                        uint16_t                nscount;
+                        uint16_t                nsmap[MAXNS];
+                        int                     nssocks[MAXNS];
+                        uint16_t                nscount6;
+                        uint16_t                nsinit;
+                        struct sockaddr_in6     *nsaddrs[MAXNS];
+                        unsigned int            _initstamp[2];
+                } _ext;
+        } _u;
+} *res_state;
+
+#define __RES   19991006
+
+#ifndef _PATH_RESCONF
+#define _PATH_RESCONF        "/etc/resolv.conf"
+#endif
+
+struct res_sym {
+        int number;
+        char *name;
+        char *humanname;
+};
+
+#define RES_F_VC        0x00000001
+#define RES_F_CONN      0x00000002
+#define RES_F_EDNS0ERR  0x00000004
+
+#define RES_EXHAUSTIVE  0x00000001
+
+#define RES_INIT        0x00000001
+#define RES_DEBUG       0x00000002
+#define RES_AAONLY      0x00000004
+#define RES_USEVC       0x00000008
+#define RES_PRIMARY     0x00000010
+#define RES_IGNTC       0x00000020
+#define RES_RECURSE     0x00000040
+#define RES_DEFNAMES    0x00000080
+#define RES_STAYOPEN    0x00000100
+#define RES_DNSRCH      0x00000200
+#define RES_INSECURE1   0x00000400
+#define RES_INSECURE2   0x00000800
+#define RES_NOALIASES   0x00001000
+#define RES_USE_INET6   0x00002000
+#define RES_ROTATE      0x00004000
+#define RES_NOCHECKNAME 0x00008000
+#define RES_KEEPTSIG    0x00010000
+#define RES_BLAST       0x00020000
+#define RES_USEBSTRING  0x00040000
+#define RES_NOIP6DOTINT 0x00080000
+#define RES_USE_EDNS0   0x00100000
+#define RES_SNGLKUP     0x00200000
+#define RES_SNGLKUPREOP 0x00400000
+#define RES_USE_DNSSEC  0x00800000
+
+#define RES_DEFAULT     (RES_RECURSE|RES_DEFNAMES|RES_DNSRCH|RES_NOIP6DOTINT)
+
+#define RES_PRF_STATS   0x00000001
+#define RES_PRF_UPDATE  0x00000002
+#define RES_PRF_CLASS   0x00000004
+#define RES_PRF_CMD     0x00000008
+#define RES_PRF_QUES    0x00000010
+#define RES_PRF_ANS     0x00000020
+#define RES_PRF_AUTH    0x00000040
+#define RES_PRF_ADD     0x00000080
+#define RES_PRF_HEAD1   0x00000100
+#define RES_PRF_HEAD2   0x00000200
+#define RES_PRF_TTLID   0x00000400
+#define RES_PRF_HEADX   0x00000800
+#define RES_PRF_QUERY   0x00001000
+#define RES_PRF_REPLY   0x00002000
+#define RES_PRF_INIT    0x00004000
+
+struct __res_state *__res_state(void);
+#define _res (*__res_state())
+
+int res_init(void);
+int res_query(const char *, int, int, unsigned char *, int);
+int res_querydomain(const char *, const char *, int, int, unsigned char *, int);
+int res_search(const char *, int, int, unsigned char *, int);
+int res_mkquery(int, const char *, int, int, const unsigned char *, int, const unsigned char*, unsigned char *, int);
+int res_send(const unsigned char *, int, unsigned char *, int);
+int dn_comp(const char *, unsigned char *, int, unsigned char **, unsigned char **);
+int dn_expand(const unsigned char *, const unsigned char *, const unsigned char *, char *, int);
+int dn_skipname(const unsigned char *, const unsigned char *);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif