diff --git a/build.rs b/build.rs
index ee0d86edecb81..5945799d2423d 100644
--- a/build.rs
+++ b/build.rs
@@ -1,7 +1,6 @@
 use std::env;
 use std::process::Command;
 use std::str;
-use std::string::String;
 
 // List of cfgs this build script is allowed to set. The list is needed to support check-cfg, as we
 // need to know all the possible cfgs that this script will set. If you need to set another cfg
diff --git a/libc-test/semver/android.txt b/libc-test/semver/android.txt
index 9722b6e361f30..0bf7f422a2f49 100644
--- a/libc-test/semver/android.txt
+++ b/libc-test/semver/android.txt
@@ -2033,6 +2033,7 @@ RTLD_LAZY
 RTLD_LOCAL
 RTLD_NOLOAD
 RTLD_NOW
+RTLD_NODELETE
 TCA_UNSPEC
 TCA_KIND
 TCA_OPTIONS
diff --git a/libc-test/semver/solarish.txt b/libc-test/semver/solarish.txt
new file mode 100644
index 0000000000000..069508925c8ef
--- /dev/null
+++ b/libc-test/semver/solarish.txt
@@ -0,0 +1 @@
+PIPE_BUF
diff --git a/src/unix/haiku/mod.rs b/src/unix/haiku/mod.rs
index 0e60a1c6e267b..4dc931cd047d9 100644
--- a/src/unix/haiku/mod.rs
+++ b/src/unix/haiku/mod.rs
@@ -1791,6 +1791,7 @@ extern "C" {
         lock: *mut pthread_mutex_t,
         abstime: *const ::timespec,
     ) -> ::c_int;
+    pub fn pthread_sigqueue(thread: ::pthread_t, sig: ::c_int, value: ::sigval) -> ::c_int;
     pub fn pthread_spin_init(lock: *mut ::pthread_spinlock_t, pshared: ::c_int) -> ::c_int;
     pub fn pthread_spin_destroy(lock: *mut ::pthread_spinlock_t) -> ::c_int;
     pub fn pthread_spin_lock(lock: *mut ::pthread_spinlock_t) -> ::c_int;
diff --git a/src/unix/linux_like/android/mod.rs b/src/unix/linux_like/android/mod.rs
index c2e7ddf2fc8be..535e874080633 100644
--- a/src/unix/linux_like/android/mod.rs
+++ b/src/unix/linux_like/android/mod.rs
@@ -1761,6 +1761,7 @@ pub const ST_NODIRATIME: ::c_ulong = 2048;
 pub const ST_RELATIME: ::c_ulong = 4096;
 
 pub const RTLD_NOLOAD: ::c_int = 0x4;
+pub const RTLD_NODELETE: ::c_int = 0x1000;
 
 pub const SEM_FAILED: *mut sem_t = 0 as *mut sem_t;
 
diff --git a/src/unix/mod.rs b/src/unix/mod.rs
index 49984d3f00c65..26a4029d94f87 100644
--- a/src/unix/mod.rs
+++ b/src/unix/mod.rs
@@ -396,7 +396,7 @@ cfg_if! {
         #[cfg_attr(feature = "rustc-dep-of-std",
                    link(name = "c", cfg(not(target_feature = "crt-static"))))]
         extern {}
-    } else if #[cfg(target_env = "aix")] {
+    } else if #[cfg(target_os = "aix")] {
         #[link(name = "c")]
         #[link(name = "m")]
         #[link(name = "bsd")]
diff --git a/src/unix/solarish/mod.rs b/src/unix/solarish/mod.rs
index 7ed00413dc7f2..d8ffc8e4411c4 100644
--- a/src/unix/solarish/mod.rs
+++ b/src/unix/solarish/mod.rs
@@ -1279,6 +1279,7 @@ pub const FOPEN_MAX: ::c_uint = 20;
 pub const FILENAME_MAX: ::c_uint = 1024;
 pub const L_tmpnam: ::c_uint = 25;
 pub const TMP_MAX: ::c_uint = 17576;
+pub const PIPE_BUF: ::c_int = 5120;
 
 pub const GRND_NONBLOCK: ::c_uint = 0x0001;
 pub const GRND_RANDOM: ::c_uint = 0x0002;