Add new sendfile flags for FreeBSD
diff --git a/libc-test/build.rs b/libc-test/build.rs
index 1262eea..82491bb 100644
--- a/libc-test/build.rs
+++ b/libc-test/build.rs
@@ -521,6 +521,9 @@
"EVFILT_PROCDESC" | "EVFILT_SENDFILE" | "EVFILT_EMPTY" |
"PD_CLOEXEC" | "PD_ALLOWED_AT_FORK" if freebsd => true,
+ // These constants were added in FreeBSD 12
+ "SF_USER_READAHEAD" if freebsd => true,
+
// These OSX constants are removed in Sierra.
// https://developer.apple.com/library/content/releasenotes/General/APIDiffsMacOS10_12/Swift/Darwin.html
"KERN_KDENABLE_BG_TRACE" if apple => true,
diff --git a/src/unix/bsd/freebsdlike/freebsd/mod.rs b/src/unix/bsd/freebsdlike/freebsd/mod.rs
index a2a6d69..def81df 100644
--- a/src/unix/bsd/freebsdlike/freebsd/mod.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/mod.rs
@@ -168,6 +168,8 @@
pub const SF_NODISKIO: ::c_int = 0x00000001;
pub const SF_MNOWAIT: ::c_int = 0x00000002;
pub const SF_SYNC: ::c_int = 0x00000004;
+pub const SF_USER_READAHEAD: ::c_int = 0x00000008;
+pub const SF_NOCACHE: ::c_int = 0x00000010;
pub const O_CLOEXEC: ::c_int = 0x00100000;
pub const O_DIRECTORY: ::c_int = 0x00020000;
pub const O_EXEC: ::c_int = 0x00040000;