#![allow(missing_doc)]
#![allow(uppercase_variables)]
+#![feature(link_args)] // NOTE: remove after stage0
+
#[cfg(test)] extern crate std;
#[cfg(test)] extern crate test;
#[cfg(test)] extern crate native;
#[link(name = "m")]
extern {}
+// NOTE: remove this after a stage0 snap
+#[cfg(stage0, windows)]
+#[link_args = "-Wl,--enable-long-section-names"]
+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
// DWARF stack unwinding will not work.
// This behavior may be overridden by --link-args "-static-libgcc"
args.push(~"-shared-libgcc");
+
+ // And here, we see obscure linker flags #45. On windows, it has been
+ // found to be necessary to have this flag to compile liblibc.
+ //
+ // First a bit of background. On Windows, the file format is not ELF,
+ // but COFF (at least according to LLVM). COFF doesn't officially allow
+ // for section names over 8 characters, apparently. Our metadata
+ // section, ".note.rustc", you'll note is over 8 characters.
+ //
+ // On more recent versions of gcc on mingw, apparently the section name
+ // is *not* truncated, but rather stored elsewhere in a separate lookup
+ // table. On older versions of gcc, they apparently always truncated the
+ // section names (at least in some cases). Truncating the section name
+ // actually creates "invalid" objects [1] [2], but only for some
+ // introspection tools, not in terms of whether it can be loaded.
+ //
+ // Long story shory, passing this flag forces the linker to *not*
+ // truncate section names (so we can find the metadata section after
+ // it's compiled). The real kicker is that rust compiled just fine on
+ // windows for quite a long time *without* this flag, so I have no idea
+ // why it suddenly started failing for liblibc. Regardless, we
+ // definitely don't want section name truncation, so we're keeping this
+ // flag for windows.
+ //
+ // [1] - https://sourceware.org/bugzilla/show_bug.cgi?id=13130
+ // [2] - https://code.google.com/p/go/issues/detail?id=2139
+ args.push(~"-Wl,--enable-long-section-names");
}
if sess.targ_cfg.os == abi::OsAndroid {