libc: link to libc and libm

Author: emberian

src/liblibc/lib.rs

@@ -197,6 +197,11 @@ pub use funcs::posix88::unistd::{execv, execve, execvp, getcwd};
 pub use funcs::posix88::unistd::{getpid, isatty, lseek, pipe, read};
 pub use funcs::posix88::unistd::{rmdir, unlink, write};
 
+#[cfg(not(windows))]
+#[link(name = "c")]
+#[link(name = "m")]
+extern {}
+
 /// A wrapper for a nullable pointer. Don't use this except for interacting
 /// with libc. Basically Option, but without the dependance on libstd.
 // If/when libprim happens, this can be removed in favor of that

src/librustc/middle/trans/context.rs

@@ -29,7 +29,6 @@ use util::sha2::Sha256;
 use util::nodemap::{NodeMap, NodeSet, DefIdMap};
 
 use libc::c_uint;
-use collections::{HashMap, HashSet};
 use std::cell::{Cell, RefCell};
 use std::c_str::ToCStr;
 use std::ptr;

src/libstd/rtdeps.rs

@@ -22,17 +22,13 @@ extern {}
 // On linux librt and libdl are indirect dependencies via rustrt,
 // and binutils 2.22+ won't add them automatically
 #[cfg(target_os = "linux")]
-#[link(name = "c")]
 #[link(name = "dl")]
-#[link(name = "m")]
 #[link(name = "pthread")]
 extern {}
 
 #[cfg(target_os = "android")]
 #[link(name = "dl")]
 #[link(name = "log")]
-#[link(name = "m")]
-#[link(name = "c")]
 extern {}
 
 #[cfg(target_os = "freebsd")]