diff --git a/mod.zig b/mod.zig
index 3feb042ab2d99abc0c13300e5984dc1290cbb19c..bc0e0d90afb99a2168b32809ebde32c68746f2aa 100644
--- a/mod.zig
+++ b/mod.zig
@@ -1366,6 +1366,26 @@ pub const libc = struct {
     /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/fpathconf.html
     pub extern fn fpathconf(fildes: c_int, name: c_int) c_long;
 
+    /// void free(void *ptr);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/free.html
+    pub extern fn free(ptr: ?*anyopaque) void;
+
+    /// void freelocale(locale_t locobj);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/freelocale.html
+    pub extern fn freelocale(locobj: locale_t) void;
+
+    /// double frexp(double num, int *exp);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/frexp.html
+    pub extern fn frexp(x: f64, exp: *c_int) f64;
+
+    /// float frexpf(float num, int *exp);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/frexpf.html
+    pub extern fn frexpf(x: f32, exp: *c_int) f32;
+
+    /// long double frexpl(long double num, int *exp);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/frexpl.html
+    pub extern fn frexpl(x: c_longdouble, exp: *c_int) c_longdouble;
+
     /// int fstat(int fildes, struct stat *buf);
     /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/fstat.html
     pub extern fn fstat(fd: c_int, buf: *struct_stat) c_int;
@@ -1374,6 +1394,10 @@ pub const libc = struct {
     /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/fstatat.html
     pub extern fn fstatat(fd: c_int, noalias path: [*:0]const u8, noalias buf: *struct_stat, flag: c_int) c_int;
 
+    /// int fsync(int fildes);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/fsync.html
+    pub extern fn fsync(fd: c_int) c_int;
+
     /// int getchar(void);
     /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/getchar.html
     pub extern fn getchar() c_int;
@@ -1402,10 +1426,38 @@ pub const libc = struct {
     /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/getgrent.html
     pub extern fn getgrent() ?*struct_group;
 
+    /// struct group *getgrgid(gid_t gid);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/getgrgid.html
+    pub extern fn getgrgid(gid: gid_t) ?*struct_group;
+
+    /// struct group *getgrnam(const char *name);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/getgrnam.html
+    pub extern fn getgrnam(name: [*:0]const u8) ?*struct_group;
+
+    /// struct hostent *gethostent(void);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/gethostent.html
+    pub extern fn gethostent() ?*struct_hostent;
+
     /// long gethostid(void);
     /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/gethostid.html
     pub extern fn gethostid() c_long;
 
+    /// int gethostname(char *name, size_t namelen);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/gethostname.html
+    pub extern fn gethostname(name: [*:0]u8, len: usize) c_int;
+
+    /// struct netent *getnetbyaddr(uint32_t net, int type);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/getnetbyaddr.html
+    pub extern fn getnetbyaddr(net: u32, type: c_int) ?*struct_netent;
+
+    /// struct netent *getnetbyname(const char *name);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/getnetbyname.html
+    pub extern fn getnetbyname(name: [*:0]const u8) ?*struct_netent;
+
+    /// struct netent *getnetent(void);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/getnetent.html
+    pub extern fn getnetent() ?*struct_netent;
+
     /// pid_t getpgid(pid_t pid);
     /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/getpgid.html
     pub extern fn getpgid(pid: pid_t) pid_t;
@@ -1422,6 +1474,14 @@ pub const libc = struct {
     /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/getppid.html
     pub extern fn getppid() pid_t;
 
+    /// struct protoent *getprotobyname(const char *name);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/getprotobyname.html
+    pub extern fn getprotobyname(name: [*:0]const u8) ?*struct_protoent;
+
+    /// struct protoent *getprotobynumber(int proto);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/getprotobynumber.html
+    pub extern fn getprotobynumber(proto: c_int) ?*struct_protoent;
+
     /// struct protoent *getprotoent(void);
     /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/getprotoent.html
     pub extern fn getprotoent() ?*struct_protoent;
@@ -1430,6 +1490,18 @@ pub const libc = struct {
     /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/getpwent.html
     pub extern fn getpwent() ?*struct_passwd;
 
+    /// struct passwd *getpwnam(const char *name);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/getpwnam.html
+    pub extern fn getpwnam(name: [*:0]const u8) ?*struct_passwd;
+
+    /// struct passwd *getpwuid(uid_t uid);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/getpwuid.html
+    pub extern fn getpwuid(uid: uid_t) ?*struct_passwd;
+
+    /// char *gets(char *s);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/gets.html
+    pub extern fn gets(s: [*]u8) [*:0]u8;
+
     /// struct servent *getservent(void);
     /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/getservent.html
     pub extern fn getservent() ?*struct_servent;
@@ -1442,18 +1514,1014 @@ pub const libc = struct {
     /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/getuid.html
     pub extern fn getuid() uid_t;
 
+    /// struct utmpx *getutxent(void);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/getutxent.html
+    pub extern fn getutxent() ?*struct_utmpx;
+
+    /// wint_t getwchar(void);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/getwchar.html
+    pub extern fn getwchar() wint_t;
+
+    /// int grantpt(int fildes);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/grantpt.html
+    pub extern fn grantpt(fd: c_int) c_int;
+
+    /// void hdestroy(void);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/hdestroy.html
+    pub extern fn hdestroy() void;
+
+    /// uint32_t htonl(uint32_t hostlong);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/htonl.html
+    pub extern fn htonl(hostlong: u32) u32;
+
+    /// uint16_t htons(uint16_t hostshort);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/htons.html
+    pub extern fn htons(hostshort: u16) u16;
+
+    /// double hypot(double x, double y);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/hypot.html
+    pub extern fn hypot(x: f64, y: f64) f64;
+
+    /// float hypotf(float x, float y);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/hypotf.html
+    pub extern fn hypotf(x: f32, y: f32) f32;
+
+    /// long double hypotl(long double x, long double y);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/hypotl.html
+    pub extern fn hypotl(x: c_longdouble, y: c_longdouble) c_longdouble;
+
+    /// void if_freenameindex(struct if_nameindex *ptr);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/if_freenameindex.html
+    pub extern fn if_freenameindex(ptr: *struct_if_nameindex) void;
+
+    /// struct if_nameindex *if_nameindex(void);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/if_nameindex.html
+    pub extern fn if_nameindex() ?*struct_if_nameindex;
+
+    /// unsigned if_nametoindex(const char *ifname);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/if_nametoindex.html
+    pub extern fn if_nametoindex(ifname: [*:0]const u8) c_uint;
+
+    /// int ilogb(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/ilogb.html
+    pub extern fn ilogb(x: f64) c_int;
+
+    /// int ilogbf(float x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/ilogbf.html
+    pub extern fn ilogbf(x: f32) c_int;
+
+    /// int ilogbl(long double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/ilogbl.html
+    pub extern fn ilogbl(x: c_longdouble) c_int;
+
+    /// intmax_t imaxabs(intmax_t j);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/imaxabs.html
+    pub extern fn imaxabs(j: intmax_t) intmax_t;
+
+    /// void insque(void *element, void *pred);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/insque.html
+    pub extern fn insque(elem: *anyopaque, prev: ?*anyopaque) void;
+
+    /// int isalnum(int c);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/isalnum.html
+    pub extern fn isalnum(c: c_int) c_int;
+
+    /// int isalnum_l(int c, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/isalnum_l.html
+    pub extern fn isalnum_l(c: c_int, locale: locale_t) c_int;
+
+    /// int isalpha(int c);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/isalpha.html
+    pub extern fn isalpha(c: c_int) c_int;
+
+    /// int isalpha_l(int c, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/isalpha_l.html
+    pub extern fn isalpha_l(c: c_int, locale: locale_t) c_int;
+
+    /// int isascii(int c);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/isascii.html
+    pub extern fn isascii(c: c_int) c_int;
+
+    /// int isastream(int fildes);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/isastream.html
+    pub extern fn isastream(fd: c_int) c_int;
+
+    /// int isatty(int fildes);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/isatty.html
+    pub extern fn isatty(fd: c_int) c_int;
+
+    /// int isblank(int c);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/isblank.html
+    pub extern fn isblank(c: c_int) c_int;
+
+    /// int isblank_l(int c, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/isblank_l.html
+    pub extern fn isblank_l(c: c_int, locale: locale_t) c_int;
+
+    /// int iscntrl(int c);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iscntrl.html
+    pub extern fn iscntrl(c: c_int) c_int;
+
+    /// int iscntrl_l(int c, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iscntrl_l.html
+    pub extern fn iscntrl_l(c: c_int, locale: locale_t) c_int;
+
+    /// int isdigit(int c);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/isdigit.html
+    pub extern fn isdigit(c: c_int) c_int;
+
+    /// int isdigit_l(int c, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/isdigit_l.html
+    pub extern fn isdigit_l(c: c_int, locale: locale_t) c_int;
+
+    /// int isgraph(int c);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/isgraph.html
+    pub extern fn isgraph(c: c_int) c_int;
+
+    /// int isgraph_l(int c, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/isgraph_l.html
+    pub extern fn isgraph_l(c: c_int, locale: locale_t) c_int;
+
+    /// int islower(int c);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/islower.html
+    pub extern fn islower(c: c_int) c_int;
+
+    /// int islower_l(int c, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/islower_l.html
+    pub extern fn islower_l(c: c_int, locale: locale_t) c_int;
+
+    /// int isprint(int c);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/isprint.html
+    pub extern fn isprint(c: c_int) c_int;
+
+    /// int isprint_l(int c, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/isprint_l.html
+    pub extern fn isprint_l(c: c_int, locale: locale_t) c_int;
+
+    /// int ispunct(int c);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/ispunct.html
+    pub extern fn ispunct(c: c_int) c_int;
+
+    /// int ispunct_l(int c, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/ispunct_l.html
+    pub extern fn ispunct_l(c: c_int, locale: locale_t) c_int;
+
+    /// int isspace(int c);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/isspace.html
+    pub extern fn isspace(c: c_int) c_int;
+
+    /// int isspace_l(int c, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/isspace_l.html
+    pub extern fn isspace_l(c: c_int, locale: locale_t) c_int;
+
+    /// int isupper(int c);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/isupper.html
+    pub extern fn isupper(c: c_int) c_int;
+
+    /// int isupper_l(int c, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/isupper_l.html
+    pub extern fn isupper_l(c: c_int, locale: locale_t) c_int;
+
+    /// int iswalnum(wint_t wc);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iswalnum.html
+    pub extern fn iswalnum(wc: wint_t) c_int;
+
+    /// int iswalnum_l(wint_t wc, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iswalnum_l.html
+    pub extern fn iswalnum_l(wc: wint_t, locale: locale_t) c_int;
+
+    /// int iswalpha(wint_t wc);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iswalpha.html
+    pub extern fn iswalpha(wc: wint_t) c_int;
+
+    /// int iswalpha_l(wint_t wc, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iswalpha_l.html
+    pub extern fn iswalpha_l(wc: wint_t, locale: locale_t) c_int;
+
+    /// int iswblank(wint_t wc);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iswblank.html
+    pub extern fn iswblank(wc: wint_t) c_int;
+
+    /// int iswblank_l(wint_t wc, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iswblank_l.html
+    pub extern fn iswblank_l(wc: wint_t, locale: locale_t) c_int;
+
+    /// int iswcntrl(wint_t wc);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iswcntrl.html
+    pub extern fn iswcntrl(wc: wint_t) c_int;
+
+    /// int iswcntrl_l(wint_t wc, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iswcntrl_l.html
+    pub extern fn iswcntrl_l(wc: wint_t, locale: locale_t) c_int;
+
+    /// int iswdigit(wint_t wc);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iswdigit.html
+    pub extern fn iswdigit(wc: wint_t) c_int;
+
+    /// int iswdigit_l(wint_t wc, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iswdigit_l.html
+    pub extern fn iswdigit_l(wc: wint_t, locale: locale_t) c_int;
+
+    /// int iswgraph(wint_t wc);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iswgraph.html
+    pub extern fn iswgraph(wc: wint_t) c_int;
+
+    /// int iswgraph_l(wint_t wc, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iswgraph_l.html
+    pub extern fn iswgraph_l(wc: wint_t, locale: locale_t) c_int;
+
+    /// int iswlower(wint_t wc);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iswlower.html
+    pub extern fn iswlower(wc: wint_t) c_int;
+
+    /// int iswlower_l(wint_t wc, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iswlower_l.html
+    pub extern fn iswlower_l(wc: wint_t, locale: locale_t) c_int;
+
+    /// int iswprint(wint_t wc);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iswprint.html
+    pub extern fn iswprint(wc: wint_t) c_int;
+
+    /// int iswprint_l(wint_t wc, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iswprint_l.html
+    pub extern fn iswprint_l(wc: wint_t, locale: locale_t) c_int;
+
+    /// int iswpunct(wint_t wc);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iswpunct.html
+    pub extern fn iswpunct(wc: wint_t) c_int;
+
+    /// int iswpunct_l(wint_t wc, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iswpunct_l.html
+    pub extern fn iswpunct_l(wc: wint_t, locale: locale_t) c_int;
+
+    /// int iswspace(wint_t wc);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iswspace.html
+    pub extern fn iswspace(wc: wint_t) c_int;
+
+    /// int iswspace_l(wint_t wc, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iswspace_l.html
+    pub extern fn iswspace_l(wc: wint_t, locale: locale_t) c_int;
+
+    /// int iswupper(wint_t wc);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iswupper.html
+    pub extern fn iswupper(wc: wint_t) c_int;
+
+    /// int iswupper_l(wint_t wc, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iswupper_l.html
+    pub extern fn iswupper_l(wc: wint_t, locale: locale_t) c_int;
+
+    /// int iswxdigit(wint_t wc);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iswxdigit.html
+    pub extern fn iswxdigit(wc: wint_t) c_int;
+
+    /// int iswxdigit_l(wint_t wc, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/iswxdigit_l.html
+    pub extern fn iswxdigit_l(wc: wint_t, locale: locale_t) c_int;
+
+    /// int isxdigit(int c);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/isxdigit.html
+    pub extern fn isxdigit(c: c_int) c_int;
+
+    /// int isxdigit_l(int c, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/isxdigit_l.html
+    pub extern fn isxdigit_l(c: c_int, locale: locale_t) c_int;
+
+    /// double j0(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/j0.html
+    pub extern fn j0(x: f64) f64;
+
+    /// double j1(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/j1.html
+    pub extern fn j1(x: f64) f64;
+
+    /// double jn(int n, double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/jn.html
+    pub extern fn jn(n: c_int, x: f64) f64;
+
+    /// long labs(long i);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/labs.html
+    pub extern fn labs(i: c_long) c_long;
+
+    /// double ldexp(double x, int exp);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/ldexp.html
+    pub extern fn ldexp(x: f64, exp: c_int) f64;
+
+    /// float ldexpf(float x, int exp);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/ldexpf.html
+    pub extern fn ldexpf(x: f32, exp: c_int) f32;
+
+    /// double lgamma(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/lgamma.html
+    pub extern fn lgamma(x: f64) f64;
+
+    /// float lgammaf(float x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/lgammaf.html
+    pub extern fn lgammaf(x: f32) f32;
+
+    /// long double lgammal(long double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/lgammal.html
+    pub extern fn lgammal(x: c_longdouble) c_longdouble;
+
+    /// int listen(int socket, int backlog);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/listen.html
+    pub extern fn listen(socket: c_int, backlog: c_int) c_int;
+
+    /// long long llabs(long long i);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/llabs.html
+    pub extern fn llabs(x: c_longlong) c_longlong;
+
+    /// long long llrint(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/llrint.html
+    pub extern fn llrint(x: f64) c_longlong;
+
+    /// long long llrintf(float x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/llrintf.html
+    pub extern fn llrintf(x: f32) c_longlong;
+
+    /// long long llrintl(long double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/llrintl.html
+    pub extern fn llrintl(x: c_longdouble) c_longlong;
+
+    /// long long llround(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/llround.html
+    pub extern fn llround(x: f64) c_longlong;
+
+    /// long long llroundf(float x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/llroundf.html
+    pub extern fn llroundf(x: f32) c_longlong;
+
+    /// long long llroundl(long double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/llroundl.html
+    pub extern fn llroundl(x: c_longdouble) c_longlong;
+
+    /// struct lconv *localeconv(void);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/localeconv.html
+    pub extern fn localeconv() *struct_lconv;
+
+    /// double log(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/log.html
+    pub extern fn log(x: f64) f64;
+
+    /// double log1p(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/log1p.html
+    pub extern fn log1p(x: f64) f64;
+
+    /// float log1pf(float x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/log1pf.html
+    pub extern fn log1pf(x: f32) f32;
+
+    /// long double log1pl(long double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/log1pl.html
+    pub extern fn log1pl(x: c_longdouble) c_longdouble;
+
+    /// double log2(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/log2.html
+    pub extern fn log2(x: f64) f64;
+
+    /// float log2f(float x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/log2f.html
+    pub extern fn log2f(x: f32) f32;
+
+    /// long double log2l(long double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/log2l.html
+    pub extern fn log2l(x: c_longdouble) c_longdouble;
+
+    /// double log10(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/log10.html
+    pub extern fn log10(x: f64) f64;
+
+    /// float log10f(float x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/log10f.html
+    pub extern fn log10f(x: f32) f32;
+
+    /// long double log10l(long double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/log10l.html
+    pub extern fn log10l(x: c_longdouble) c_longdouble;
+
+    /// double logb(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/logb.html
+    pub extern fn logb(x: f64) f64;
+
+    /// float logbf(float x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/logbf.html
+    pub extern fn logbf(x: f32) f32;
+
+    /// long double logbl(long double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/logbl.html
+    pub extern fn logbl(x: c_longdouble) c_longdouble;
+
+    /// float logf(float x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/logf.html
+    pub extern fn logf(x: f32) f32;
+
+    /// long double logl(long double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/logl.html
+    pub extern fn logl(x: c_longdouble) c_longdouble;
+
+    /// long lrand48(void);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/lrand48.html
+    pub extern fn lrand48() c_long;
+
+    /// long lrint(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/lrint.html
+    pub extern fn lrint(x: f64) c_long;
+
+    /// long lrintf(float x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/lrintf.html
+    pub extern fn lrintf(x: f32) c_long;
+
+    /// long lrintl(long double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/lrintl.html
+    pub extern fn lrintl(x: c_longdouble) c_long;
+
+    /// long lround(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/lround.html
+    pub extern fn lround(x: f64) c_long;
+
+    /// long lroundf(float x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/lroundf.html
+    pub extern fn lroundf(x: f32) c_long;
+
+    /// long lroundl(long double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/lroundl.html
+    pub extern fn lroundl(x: c_longdouble) c_long;
+
+    /// off_t lseek(int fildes, off_t offset, int whence);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/lseek.html
+    pub extern fn lseek(fd: c_int, offset: off_t, whence: c_int) off_t;
+
+    /// void *malloc(size_t size);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/malloc.html
+    pub extern fn malloc(size: usize) ?*anyopaque;
+
+    /// int mkdir(const char *path, mode_t mode);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/mkdir.html
+    pub extern fn mkdir(path: [*:0]const u8, __mode: mode_t) c_int;
+
     /// int mkdirat(int fd, const char *path, mode_t mode);
     /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/mkdirat.html
     pub extern fn mkdirat(fd: c_int, path: [*:0]const u8, mode: mode_t) c_int;
 
+    /// char *mkdtemp(char *template);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/mkdtemp.html
+    pub extern fn mkdtemp(template: [*:0]u8) [*:0]u8;
+
+    /// int mkfifo(const char *path, mode_t mode);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/mkfifo.html
+    pub extern fn mkfifo(path: [*:0]const u8, mode: mode_t) c_int;
+
+    /// int mkfifoat(int fd, const char *path, mode_t mode);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/mkfifoat.html
+    pub extern fn mkfifoat(fd: c_int, path: [*:0]const u8, mode: mode_t) c_int;
+
+    /// int mkstemp(char *template);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/mkstemp.html
+    pub extern fn mkstemp(template: [*:0]u8) c_int;
+
+    /// int mlockall(int flags);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/mlockall.html
+    pub extern fn mlockall(flags: c_int) c_int;
+
+    /// int mq_unlink(const char *name);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/mq_unlink.html
+    pub extern fn mq_unlink(name: [*:0]const u8) c_int;
+
+    /// long mrand48(void);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/mrand48.html
+    pub extern fn mrand48() c_long;
+
+    /// int munlockall(void);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/munlockall.html
+    pub extern fn munlockall() void;
+
+    /// double nearbyint(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/nearbyint.html
+    pub extern fn nearbyint(x: f64) f64;
+
+    /// float nearbyintf(float x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/nearbyintf.html
+    pub extern fn nearbyintf(x: f32) f32;
+
+    /// long double nearbyintl(long double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/nearbyintl.html
+    pub extern fn nearbyintl(x: c_longdouble) c_longdouble;
+
+    /// double nextafter(double x, double y);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/nextafter.html
+    pub extern fn nextafter(x: f64, y: f64) f64;
+
+    /// float nextafterf(float x, float y);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/nextafterf.html
+    pub extern fn nextafterf(x: f32, y: f32) f32;
+
+    /// long double nextafterl(long double x, long double y);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/nextafterl.html
+    pub extern fn nextafterl(x: c_longdouble, y: c_longdouble) c_longdouble;
+
+    /// double nexttoward(double x, long double y);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/nexttoward.html
+    pub extern fn nexttoward(x: f64, y: c_longdouble) f64;
+
+    /// float nexttowardf(float x, long double y);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/nexttowardf.html
+    pub extern fn nexttowardf(x: f32, y: c_longdouble) f32;
+
+    /// long double nexttowardl(long double x, long double y);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/nexttowardl.html
+    pub extern fn nexttowardl(x: c_longdouble, y: c_longdouble) c_longdouble;
+
+    /// int nice(int incr);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/nice.html
+    pub extern fn nice(incr: c_int) c_int;
+
+    /// uint32_t ntohl(uint32_t netlong);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/ntohl.html
+    pub extern fn ntohl(netlong: u32) u32;
+
+    /// uint16_t ntohs(uint16_t netshort);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/ntohs.html
+    pub extern fn ntohs(netshort: u16) u16;
+
     /// int openat(int fd, const char *path, int oflag, ...);
     /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/openat.html
     pub extern fn openat(fd: c_int, file: [*:0]const u8, oflag: c_int, ...) c_int;
 
+    /// int pause(void);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/pause.html
+    pub extern fn pause() c_int;
+
+    /// double pow(double x, double y);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/pow.html
+    pub extern fn pow(x: f64, y: f64) f64;
+
+    /// float powf(float x, float y);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/powf.html
+    pub extern fn powf(x: f32, y: f32) f32;
+
+    /// long double powl(long double x, long double y);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/powl.html
+    pub extern fn powl(x: c_longdouble, y: c_longdouble) c_longdouble;
+
+    /// int pthread_cancel(pthread_t thread);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/pthread_cancel.html
+    pub extern fn pthread_cancel(thread: pthread_t) c_int;
+
+    /// int pthread_detach(pthread_t thread);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/pthread_detach.html
+    pub extern fn pthread_detach(thread: pthread_t) c_int;
+
+    /// int pthread_equal(pthread_t t1, pthread_t t2);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/pthread_equal.html
+    pub extern fn pthread_equal(thread1: pthread_t, thread2: pthread_t) c_int;
+
+    /// int pthread_getconcurrency(void);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/pthread_getconcurrency.html
+    pub extern fn pthread_getconcurrency() c_int;
+
+    /// int pthread_kill(pthread_t thread, int sig);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/pthread_kill.html
+    pub extern fn pthread_kill(thread: pthread_t, sig: c_int) c_int;
+
+    /// pthread_t pthread_self(void);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/pthread_self.html
+    pub extern fn pthread_self() pthread_t;
+
+    /// void pthread_testcancel(void);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/pthread_testcancel.html
+    pub extern fn pthread_testcancel() void;
+
+    /// int putchar(int c);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/putchar.html
+    pub extern fn putchar(c: c_int) c_int;
+
+    /// int putchar_unlocked(int c);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/putchar_unlocked.html
+    pub extern fn putchar_unlocked(c: c_int) c_int;
+
+    /// wint_t putwchar(wchar_t wc);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/putwchar.html
+    pub extern fn putwchar(wc: wchar_t) wint_t;
+
+    /// int raise(int sig);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/raise.html
+    pub extern fn raise(sig: c_int) c_int;
+
+    /// int rand(void);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/rand.html
+    pub extern fn rand() c_int;
+
+    /// long random(void);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/random.html
+    pub extern fn random() c_long;
+
     /// ssize_t read(int fildes, void *buf, size_t nbyte);
     /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/read.html
     pub extern fn read(fd: c_int, buf: [*]u8, count: usize) isize;
 
+    /// double remainder(double x, double y);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/remainder.html
+    pub extern fn remainder(x: f64, y: f64) f64;
+
+    /// float remainderf(float x, float y);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/remainderf.html
+    pub extern fn remainderf(x: f32, y: f32) f32;
+
+    /// long double remainderl(long double x, long double y);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/remainderl.html
+    pub extern fn remainderl(x: c_longdouble, y: c_longdouble) c_longdouble;
+
+    /// double rint(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/rint.html
+    pub extern fn rint(x: f64) f64;
+
+    /// float rintf(float x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/rintf.html
+    pub extern fn rintf(x: f32) f32;
+
+    /// long double rintl(long double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/rintl.html
+    pub extern fn rintl(x: c_longdouble) c_longdouble;
+
+    /// int rmdir(const char *path);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/rmdir.html
+    pub extern fn rmdir(path: [*:0]const u8) c_int;
+
+    /// double round(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/round.html
+    pub extern fn round(x: f64) f64;
+
+    /// float roundf(float x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/roundf.html
+    pub extern fn roundf(x: f32) f32;
+
+    /// long double roundl(long double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/roundl.html
+    pub extern fn roundl(x: c_longdouble) c_longdouble;
+
+    /// double scalbln(double x, long n);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/scalbln.html
+    pub extern fn scalbln(x: f64, n: c_long) f64;
+
+    /// float scalblnf(float x, long n);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/scalblnf.html
+    pub extern fn scalblnf(x: f32, n: c_long) f32;
+
+    /// long double scalblnl(long double x, long n);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/scalblnl.html
+    pub extern fn scalblnl(x: c_longdouble, n: c_long) c_longdouble;
+
+    /// double scalbn(double x, int n);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/scalbn.html
+    pub extern fn scalbn(x: f64, n: c_int) f64;
+
+    /// float scalbnf(float x, int n);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/scalbnf.html
+    pub extern fn scalbnf(x: f32, n: c_int) f32;
+
+    /// long double scalbnl(long double x, int n);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/scalbnl.html
+    pub extern fn scalbnl(x: c_longdouble, n: c_int) c_longdouble;
+
+    /// int sched_get_priority_max(int policy);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/sched_get_priority_max.html
+    pub extern fn sched_get_priority_max(policy: c_int) c_int;
+
+    /// int sched_get_priority_min(int policy);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/sched_get_priority_min.html
+    pub extern fn sched_get_priority_min(policy: c_int) c_int;
+
+    /// int sched_getscheduler(pid_t pid);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/sched_getscheduler.html
+    pub extern fn sched_getscheduler(pid: pid_t) c_int;
+
+    /// int sched_yield(void);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/sched_yield.html
+    pub extern fn sched_yield() c_int;
+
+    /// int sem_unlink(const char *name);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/sem_unlink.html
+    pub extern fn sem_unlink(name: [*:0]const u8) c_int;
+
+    /// int semctl(int semid, int semnum, int cmd, ...);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/semctl.html
+    pub extern fn semctl(semid: c_int, semnum: c_int, cmd: c_int, ...) c_int;
+
+    /// int setegid(gid_t gid);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/setegid.html
+    pub extern fn setegid(gid: gid_t) c_int;
+
+    /// int seteuid(uid_t uid);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/seteuid.html
+    pub extern fn seteuid(uid: uid_t) c_int;
+
+    /// int setgid(gid_t gid);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/setgid.html
+    pub extern fn setgid(gid: gid_t) c_int;
+
+    /// void setgrent(void);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/setgrent.html
+    pub extern fn setgrent() void;
+
+    /// void sethostent(int stayopen);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/sethostent.html
+    pub extern fn sethostent(stayopen: c_int) void;
+
+    /// int setlogmask(int maskpri);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/setlogmask.html
+    pub extern fn setlogmask(maskpri: c_int) c_int;
+
+    /// void setnetent(int stayopen);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/setnetent.html
+    pub extern fn setnetent(stayopen: c_int) void;
+
+    /// pid_t setpgrp(void);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/setpgrp.html
+    pub extern fn setpgrp() pid_t;
+
+    /// void setprotoent(int stayopen);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/setprotoent.html
+    pub extern fn setprotoent(stayopen: c_int) void;
+
+    /// void setpwent(void);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/setpwent.html
+    pub extern fn setpwent() void;
+
+    /// int setregid(gid_t rgid, gid_t egid);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/setregid.html
+    pub extern fn setregid(rgid: gid_t, egid: gid_t) c_int;
+
+    /// int setreuid(uid_t ruid, uid_t euid);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/setreuid.html
+    pub extern fn setreuid(ruid: uid_t, euid: uid_t) c_int;
+
+    /// void setservent(int stayopen);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/setservent.html
+    pub extern fn setservent(stayopen: c_int) void;
+
+    /// pid_t setsid(void);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/setsid.html
+    pub extern fn setsid() pid_t;
+
+    /// int setuid(uid_t uid);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/setuid.html
+    pub extern fn setuid(uid: uid_t) c_int;
+
+    /// void setutxent(void);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/setutxent.html
+    pub extern fn setutxent() void;
+
+    /// int shm_unlink(const char *name);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/shm_unlink.html
+    pub extern fn shm_unlink(name: [*:0]const u8) c_int;
+
+    /// int shutdown(int socket, int how);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/shutdown.html
+    pub extern fn shutdown(socket: c_int, how: c_int) c_int;
+
+    /// int sighold(int sig);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/sighold.html
+    pub extern fn sighold(sig: c_int) c_int;
+
+    /// int sigignore(int sig);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/sigignore.html
+    pub extern fn sigignore(sig: c_int) c_int;
+
+    /// int siginterrupt(int sig, int flag);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/siginterrupt.html
+    pub extern fn siginterrupt(sig: c_int, flag: c_int) c_int;
+
+    /// int sigpause(int sig);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/sigpause.html
+    pub extern fn sigpause(sig: c_int) c_int;
+
+    /// int sigrelse(int sig);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/sigrelse.html
+    pub extern fn sigrelse(sig: c_int) c_int;
+
+    /// double sin(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/sin.html
+    pub extern fn sin(x: f64) f64;
+
+    /// float sinf(float x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/sinf.html
+    pub extern fn sinf(x: f32) f32;
+
+    /// double sinh(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/sinh.html
+    pub extern fn sinh(x: f64) f64;
+
+    /// float sinhf(float x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/sinhf.html
+    pub extern fn sinhf(x: f32) f32;
+
+    /// long double sinhl(long double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/sinhl.html
+    pub extern fn sinhl(x: c_longdouble) c_longdouble;
+
+    /// long double sinl(long double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/sinl.html
+    pub extern fn sinl(x: c_longdouble) c_longdouble;
+
+    /// unsigned sleep(unsigned seconds);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/sleep.html
+    pub extern fn sleep(seconds: c_uint) c_uint;
+
+    /// int sockatmark(int s);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/sockatmark.html
+    pub extern fn sockatmark(s: c_int) c_int;
+
+    /// int socket(int domain, int type, int protocol);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/socket.html
+    pub extern fn socket(domain: c_int, type: c_int, protocol: c_int) c_int;
+
+    /// int socketpair(int domain, int type, int protocol, int socket_vector[2]);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/socketpair.html
+    pub extern fn socketpair(domain: c_int, type: c_int, protocol: c_int, fds: *[2]c_int) c_int;
+
+    /// double sqrt(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/sqrt.html
+    pub extern fn sqrt(x: f64) f64;
+
+    /// float sqrtf(float x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/sqrtf.html
+    pub extern fn sqrtf(x: f32) f32;
+
+    /// long double sqrtl(long double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/sqrtl.html
+    pub extern fn sqrtl(x: c_longdouble) c_longdouble;
+
+    /// void srand(unsigned seed);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/srand.html
+    pub extern fn srand(seed: c_uint) void;
+
+    /// void srand48(long seedval);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/srand48.html
+    pub extern fn srand48(seedval: c_long) void;
+
+    /// void srandom(unsigned seed);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/srandom.html
+    pub extern fn srandom(seed: c_uint) void;
+
+    /// size_t strlen(const char *s);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/strlen.html
+    pub extern fn strlen(s: [*:0]const u8) c_ulong;
+
+    /// void sync(void);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/sync.html
+    pub extern fn sync() void;
+
+    /// long sysconf(int name);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/sysconf.html
+    pub extern fn sysconf(name: c_int) c_long;
+
+    /// double tan(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/tan.html
+    pub extern fn tan(x: f64) f64;
+
+    /// float tanf(float x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/tanf.html
+    pub extern fn tanf(x: f32) f32;
+
+    /// double tanh(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/tanh.html
+    pub extern fn tanh(x: f64) f64;
+
+    /// float tanhf(float x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/tanhf.html
+    pub extern fn tanhf(x: f32) f32;
+
+    /// long double tanhl(long double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/tanhl.html
+    pub extern fn tanhl(x: c_longdouble) c_longdouble;
+
+    /// long double tanl(long double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/tanl.html
+    pub extern fn tanl(x: c_longdouble) c_longdouble;
+
+    /// int tcdrain(int fildes);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/tcdrain.html
+    pub extern fn tcdrain(fd: c_int) c_int;
+
+    /// int tcflow(int fildes, int action);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/tcflow.html
+    pub extern fn tcflow(fd: c_int, action: c_int) c_int;
+
+    /// int tcflush(int fildes, int queue_selector);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/tcflush.html
+    pub extern fn tcflush(fd: c_int, queue_selector: c_int) c_int;
+
+    /// pid_t tcgetpgrp(int fildes);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/tcgetpgrp.html
+    pub extern fn tcgetpgrp(fd: c_int) pid_t;
+
+    /// pid_t tcgetsid(int fildes);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/tcgetsid.html
+    pub extern fn tcgetsid(fd: c_int) pid_t;
+
+    /// int tcsendbreak(int fildes, int duration);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/tcsendbreak.html
+    pub extern fn tcsendbreak(fd: c_int, duration: c_int) c_int;
+
+    /// double tgamma(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/tgamma.html
+    pub extern fn tgamma(x: f64) f64;
+
+    /// float tgammaf(float x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/tgammaf.html
+    pub extern fn tgammaf(x: f32) f32;
+
+    /// long double tgammal(long double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/tgammal.html
+    pub extern fn tgammal(x: c_longdouble) c_longdouble;
+
+    /// int toascii(int c);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/toascii.html
+    pub extern fn toascii(c: c_int) c_int;
+
+    /// int tolower(int c);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/tolower.html
+    pub extern fn tolower(c: c_int) c_int;
+
+    /// int tolower_l(int c, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/tolower_l.html
+    pub extern fn tolower_l(c: c_int, locale: locale_t) c_int;
+
+    /// int toupper(int c);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/toupper.html
+    pub extern fn toupper(c: c_int) c_int;
+
+    /// int toupper_l(int c, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/toupper_l.html
+    pub extern fn toupper_l(c: c_int, locale: locale_t) c_int;
+
+    /// wint_t towlower(wint_t wc);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/towlower.html
+    pub extern fn towlower(wc: wint_t) wint_t;
+
+    /// wint_t towlower_l(wint_t wc, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/towlower_l.html
+    pub extern fn towlower_l(wc: wint_t, locale: locale_t) wint_t;
+
+    /// wint_t towupper(wint_t wc);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/towupper.html
+    pub extern fn towupper(wc: wint_t) wint_t;
+
+    /// wint_t towupper_l(wint_t wc, locale_t locale);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/towupper_l.html
+    pub extern fn towupper_l(wc: wint_t, locale: locale_t) wint_t;
+
+    /// double trunc(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/trunc.html
+    pub extern fn trunc(x: f64) f64;
+
+    /// float truncf(float x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/truncf.html
+    pub extern fn truncf(x: f32) f32;
+
+    /// long double truncl(long double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/truncl.html
+    pub extern fn truncl(x: c_longdouble) c_longdouble;
+
+    /// void tzset(void);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/tzset.html
+    pub extern fn tzset() void;
+
+    /// long ulimit(int cmd, ...);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/ulimit.html
+    pub extern fn ulimit(cmd: c_int, ...) c_long;
+
+    /// mode_t umask(mode_t cmask);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/umask.html
+    pub extern fn umask(cmask: mode_t) mode_t;
+
+    /// int unlockpt(int fildes);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/unlockpt.html
+    pub extern fn unlockpt(fd: c_int) c_int;
+
+    /// locale_t uselocale(locale_t newloc);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/uselocale.html
+    pub extern fn uselocale(newloc: locale_t) locale_t;
+
+    /// int wctob(wint_t c);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/wctob.html
+    pub extern fn wctob(c: wint_t) c_int;
+
+    /// int wcwidth(wchar_t wc);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/wcwidth.html
+    pub extern fn wcwidth(wc: wchar_t) c_int;
+
+    /// double y0(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/y0.html
+    pub extern fn y0(x: f64) f64;
+
+    /// double y1(double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/y1.html
+    pub extern fn y1(x: f64) f64;
+
+    /// double yn(int n, double x);
+    /// https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/yn.html
+    pub extern fn yn(n: c_int, x: f64) f64;
+
     //
     //