Auto merge of #967 - semarie:openbsd-sigstksz, r=alexcrichton

openbsd: SIGSTKSZ has been reduced

On OpenBSD 6.3, `SIGSTKSZ` value has changed.
openbsd/src@e211c58

Author: bors

src/unix/bsd/netbsdlike/mod.rs

@@ -177,7 +177,6 @@ pub const SIGSEGV : ::c_int = 11;
 pub const SIGPIPE : ::c_int = 13;
 pub const SIGALRM : ::c_int = 14;
 pub const SIGTERM : ::c_int = 15;
-pub const SIGSTKSZ : ::size_t = 40960;
 
 pub const PROT_NONE : ::c_int = 0;
 pub const PROT_READ : ::c_int = 1;

src/unix/bsd/netbsdlike/netbsd/mod.rs

@@ -947,6 +947,8 @@ pub const CHWFLOW: ::tcflag_t = ::MDMBUF | ::CRTSCTS | ::CDTRCTS;
 pub const SOCK_CLOEXEC: ::c_int = 0x10000000;
 pub const SOCK_NONBLOCK: ::c_int = 0x20000000;
 
+pub const SIGSTKSZ : ::size_t = 40960;
+
 // dirfd() is a macro on netbsd to access
 // the first field of the struct where dirp points to:
 // http://cvsweb.netbsd.org/bsdweb.cgi/src/include/dirent.h?rev=1.36

src/unix/bsd/netbsdlike/openbsdlike/bitrig/mod.rs

@@ -83,6 +83,8 @@ pub const IFF_LINK1: ::c_int = 0x2000; // per link layer defined bit
 pub const IFF_LINK2: ::c_int = 0x4000; // per link layer defined bit
 pub const IFF_MULTICAST: ::c_int = 0x8000; // supports multicast
 
+pub const SIGSTKSZ : ::size_t = 40960;
+
 extern {
     pub fn nl_langinfo_l(item: ::nl_item, locale: ::locale_t) -> *mut ::c_char;
     pub fn duplocale(base: ::locale_t) -> ::locale_t;

src/unix/bsd/netbsdlike/openbsdlike/openbsd/mod.rs

@@ -47,6 +47,8 @@ pub const IFF_LINK1: ::c_int = 0x2000; // per link layer defined bit
 pub const IFF_LINK2: ::c_int = 0x4000; // per link layer defined bit
 pub const IFF_MULTICAST: ::c_int = 0x8000; // supports multicast
 
+pub const SIGSTKSZ : ::size_t = 24576;
+
 extern {
     pub fn accept4(s: ::c_int, addr: *mut ::sockaddr,
                    addrlen: *mut ::socklen_t, flags: ::c_int) -> ::c_int;