Skip cmsg tests on s390x and sparc64

Author: asomers

libc-test/build.rs

@@ -6,7 +6,13 @@ extern crate ctest;
 use std::env;
 
 fn do_cc() {
-    #[cfg(unix)] {
+    // Run the cmsg tests on all Unixen, but skip them on platforms that fail
+    // due to suspected QEMU bugs.  Sparc64 gets SIGILL and s390x hangs, both
+    // before executing any test functions.
+    #[cfg(all(unix,
+              not(target_arch = "sparc64"),
+              not(target_arch = "s390x")))]
+    {
         cc::Build::new()
             .file("src/cmsg.c")
             .compile("cmsg");

libc-test/test/cmsg.rs

@@ -5,7 +5,14 @@ extern crate libc;
 use libc::{c_uchar, c_uint, c_void, cmsghdr, msghdr};
 use std::{mem, ptr};
 
-#[cfg(unix)]
+// Run these tests on all Unixen, but skip them on platforms that fail due to
+// suspected QEMU bugs.  Sparc64 gets SIGILL and s390x hangs, both before
+// executing any test functions.
+#[cfg(all(unix,
+          not(target_arch = "sparc64"),
+          not(target_arch = "s390x")))]
+{
+
 extern {
     pub fn cmsg_firsthdr(msgh: *const msghdr) -> *mut cmsghdr;
     pub fn cmsg_nxthdr(mhdr: *const msghdr,
@@ -15,7 +22,6 @@ extern {
     pub fn cmsg_data(cmsg: *const cmsghdr) -> *mut c_uchar;
 }
 
-#[cfg(unix)]
 #[test]
 fn test_cmsg_data() {
     for l in 0..128 {
@@ -26,7 +32,6 @@ fn test_cmsg_data() {
     }
 }
 
-#[cfg(unix)]
 #[test]
 fn test_cmsg_firsthdr() {
     let mut mhdr: msghdr = unsafe{mem::zeroed()};
@@ -40,7 +45,6 @@ fn test_cmsg_firsthdr() {
     }
 }
 
-#[cfg(unix)]
 #[test]
 fn test_cmsg_len() {
     for l in 0..128 {
@@ -50,7 +54,6 @@ fn test_cmsg_len() {
     }
 }
 
-#[cfg(unix)]
 #[test]
 fn test_cmsg_nxthdr() {
     let mut buffer = [0u8; 256];
@@ -83,7 +86,6 @@ fn test_cmsg_nxthdr() {
     }
 }
 
-#[cfg(unix)]
 #[test]
 fn test_cmsg_space() {
     unsafe {
@@ -92,3 +94,5 @@ fn test_cmsg_space() {
         }
     }
 }
+
+}