Constify CMSG_LEN for all targets.

src/fuchsia/mod.rs

@@ -3271,7 +3271,7 @@ f! {
             as ::c_uint
     }
 
-    pub fn CMSG_LEN(len: ::c_uint) -> ::c_uint {
+    pub {const} fn CMSG_LEN(len: ::c_uint) -> ::c_uint {
         (CMSG_ALIGN(::mem::size_of::<cmsghdr>()) + len as ::size_t) as ::c_uint
     }
 }

src/unix/aix/mod.rs

@@ -2551,7 +2551,7 @@ f! {
         (cmsg as *mut ::c_uchar).offset(::mem::size_of::<::cmsghdr>() as isize)
     }
 
-    pub fn CMSG_LEN(length: ::c_uint) -> ::c_uint {
+    pub {const} fn CMSG_LEN(length: ::c_uint) -> ::c_uint {
         ::mem::size_of::<::cmsghdr>() as ::c_uint + length
     }
 

src/unix/bsd/apple/mod.rs

@@ -5107,7 +5107,7 @@ f! {
             as ::c_uint
     }
 
-    pub fn CMSG_LEN(length: ::c_uint) -> ::c_uint {
+    pub {const} fn CMSG_LEN(length: ::c_uint) -> ::c_uint {
         (__DARWIN_ALIGN32(::mem::size_of::<::cmsghdr>()) + length as usize)
             as ::c_uint
     }

src/unix/bsd/freebsdlike/dragonfly/mod.rs

@@ -1534,7 +1534,7 @@ f! {
             .offset(_CMSG_ALIGN(::mem::size_of::<::cmsghdr>()) as isize)
     }
 
-    pub fn CMSG_LEN(length: ::c_uint) -> ::c_uint {
+    pub {const} fn CMSG_LEN(length: ::c_uint) -> ::c_uint {
         (_CMSG_ALIGN(::mem::size_of::<::cmsghdr>()) + length as usize)
             as ::c_uint
     }

src/unix/bsd/freebsdlike/freebsd/mod.rs

@@ -4717,7 +4717,7 @@ f! {
             .offset(_ALIGN(::mem::size_of::<::cmsghdr>()) as isize)
     }
 
-    pub fn CMSG_LEN(length: ::c_uint) -> ::c_uint {
+    pub {const} fn CMSG_LEN(length: ::c_uint) -> ::c_uint {
         _ALIGN(::mem::size_of::<::cmsghdr>()) as ::c_uint + length
     }
 

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

@@ -2422,7 +2422,7 @@ f! {
             .offset(_ALIGN(::mem::size_of::<::cmsghdr>()) as isize)
     }
 
-    pub fn CMSG_LEN(length: ::c_uint) -> ::c_uint {
+    pub {const} fn CMSG_LEN(length: ::c_uint) -> ::c_uint {
         _ALIGN(::mem::size_of::<::cmsghdr>()) as ::c_uint + length
     }
 

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

@@ -1705,7 +1705,7 @@ f! {
             .offset(_ALIGN(::mem::size_of::<::cmsghdr>()) as isize)
     }
 
-    pub fn CMSG_LEN(length: ::c_uint) -> ::c_uint {
+    pub {const} fn CMSG_LEN(length: ::c_uint) -> ::c_uint {
         _ALIGN(::mem::size_of::<::cmsghdr>()) as ::c_uint + length
     }
 

src/unix/haiku/mod.rs

@@ -1504,7 +1504,7 @@ f! {
             as ::c_uint
     }
 
-    pub fn CMSG_LEN(length: ::c_uint) -> ::c_uint {
+    pub {const} fn CMSG_LEN(length: ::c_uint) -> ::c_uint {
         CMSG_ALIGN(::mem::size_of::<cmsghdr>()) as ::c_uint + length
     }
 

src/unix/linux_like/mod.rs

@@ -1557,7 +1557,7 @@ f! {
             as ::c_uint
     }
 
-    pub fn CMSG_LEN(length: ::c_uint) -> ::c_uint {
+    pub {const} fn CMSG_LEN(length: ::c_uint) -> ::c_uint {
         CMSG_ALIGN(::mem::size_of::<cmsghdr>()) as ::c_uint + length
     }
 

src/unix/nto/mod.rs

@@ -2539,7 +2539,7 @@ f! {
             .offset(_CMSG_ALIGN(::mem::size_of::<::cmsghdr>()) as isize)
     }
 
-    pub fn CMSG_LEN(length: ::c_uint) -> ::c_uint {
+    pub {const} fn CMSG_LEN(length: ::c_uint) -> ::c_uint {
         _CMSG_ALIGN(::mem::size_of::<::cmsghdr>()) as ::c_uint + length
     }
 

src/unix/solarish/mod.rs

@@ -2601,7 +2601,7 @@ f! {
         _CMSG_DATA_ALIGN(cmsg.offset(1) as usize) as *mut ::c_uchar
     }
 
-    pub fn CMSG_LEN(length: ::c_uint) -> ::c_uint {
+    pub {const} fn CMSG_LEN(length: ::c_uint) -> ::c_uint {
         _CMSG_DATA_ALIGN(::mem::size_of::<::cmsghdr>()) as ::c_uint + length
     }
 

src/vxworks/mod.rs

@@ -1072,7 +1072,7 @@ f! {
             as ::c_uint
     }
 
-    pub fn CMSG_LEN(length: ::c_uint) -> ::c_uint {
+    pub {const} fn CMSG_LEN(length: ::c_uint) -> ::c_uint {
         CMSG_ALIGN(::mem::size_of::<cmsghdr>()) as ::c_uint + length
     }
 }