mikros/rust
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

auto merge of #10620 : cmr/rust/linker_opts, r=thestinger

Browse Source
This commit is contained in:
bors 2013-11-23 23:56:30 -08:00
commit 738eb9b930
1 changed files with 13 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
src/librustc/back/link.rs
View File

@ -1072,6 +1072,13 @@ pub fn link_args(sess: Session,
args.push("-L" + path.as_str().unwrap().to_owned());
}
if sess.targ_cfg.os == abi::OsLinux {
// GNU-style linkers will use this to omit linking to libraries which don't actually fulfill
// any relocations, but only for libraries which follow this flag. Thus, use it before
// specifing libraries to link to.
args.push(~"-Wl,--as-needed");
}
// The names of the extern libraries
let used_libs = cstore::get_used_libraries(cstore);
for l in used_libs.iter() { args.push(~"-l" + *l); }
@ -1091,6 +1098,12 @@ pub fn link_args(sess: Session,
// On linux librt and libdl are an indirect dependencies via rustrt,
// and binutils 2.22+ won't add them automatically
if sess.targ_cfg.os == abi::OsLinux {
// GNU-style linkers supports optimization with -O. --gc-sections removes metadata and
// potentially other useful things, so don't include it.
if sess.opts.optimize == session::Default || sess.opts.optimize == session::Aggressive {
args.push(~"-Wl,-O");
}
args.push_all([~"-lrt", ~"-ldl"]);
// LLVM implements the `frem` instruction as a call to `fmod`,