Merge pull request #1174 from tklauser/mfd-hugetlb

Add MFD_HUGETLB const for linux

Author: alexcrichton

libc-test/build.rs

@@ -652,6 +652,10 @@ fn main() {
             "BOTHER" => true,
 
             "MFD_CLOEXEC" | "MFD_ALLOW_SEALING" if !mips && musl => true,
+            // MFD_HUGETLB is not available in some older libc versions on the CI builders. On the
+            // x86_64 and i686 builders it seems to be available for all targets, so at least test
+            // it there.
+            "MFD_HUGETLB" if !(x86_64 || i686) || musl => true,
 
             "DT_FIFO" | "DT_CHR" | "DT_DIR" | "DT_BLK" | "DT_REG"
             | "DT_LNK" | "DT_SOCK"

src/unix/notbsd/android/mod.rs

@@ -1056,6 +1056,7 @@ pub const O_TMPFILE: ::c_int = 0o20000000 | O_DIRECTORY;
 
 pub const MFD_CLOEXEC: ::c_uint = 0x0001;
 pub const MFD_ALLOW_SEALING: ::c_uint = 0x0002;
+pub const MFD_HUGETLB: ::c_uint = 0x0004;
 
 // linux/netfilter.h
 pub const NF_DROP: ::c_int = 0;

src/unix/notbsd/linux/mod.rs

@@ -1320,6 +1320,7 @@ pub const CMSPAR: ::tcflag_t = 0o10000000000;
 
 pub const MFD_CLOEXEC: ::c_uint = 0x0001;
 pub const MFD_ALLOW_SEALING: ::c_uint = 0x0002;
+pub const MFD_HUGETLB: ::c_uint = 0x0004;
 
 // these are used in the p_type field of Elf32_Phdr and Elf64_Phdr, which has
 // the type Elf32Word and Elf64Word respectively. Luckily, both of those are u32