OpenE2K/rust
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

linker: Factor out addition of pre-, post- and late link args

Browse Source
This commit is contained in:
Vadim Petrochenkov 2020-04-05 17:31:29 +03:00
parent 927db7d322
commit 7f42d81ea4
1 changed files with 82 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

117
src/librustc_codegen_ssa/back/link.rs
View File

@ -1189,6 +1189,74 @@ fn add_post_link_objects(cmd: &mut dyn Linker, sess: &'a Session, crate_type: co
}
}
/// Add arbitrary "pre-link" args defined by the target spec or from command line.
/// FIXME: Determine where exactly these args need to be inserted.
fn add_pre_link_args(
cmd: &mut dyn Linker,
sess: &'a Session,
flavor: LinkerFlavor,
crate_type: config::CrateType,
) {
if let Some(args) = sess.target.target.options.pre_link_args.get(&flavor) {
cmd.args(args);
}
if let Some(args) = sess.target.target.options.pre_link_args_crt.get(&flavor) {
if sess.crt_static(Some(crate_type)) {
cmd.args(args);
}
}
cmd.args(&sess.opts.debugging_opts.pre_link_args);
}
/// Add arbitrary "user defined" args defined from command line and by `#[link_args]` attributes.
/// FIXME: Determine where exactly these args need to be inserted.
fn add_user_defined_link_args(
cmd: &mut dyn Linker,
sess: &'a Session,
codegen_results: &CodegenResults,
) {
cmd.args(&sess.opts.cg.link_args);
cmd.args(&*codegen_results.crate_info.link_args);
}
/// Add arbitrary "late link" args defined by the target spec.
/// FIXME: Determine where exactly these args need to be inserted.
fn add_late_link_args(
cmd: &mut dyn Linker,
sess: &'a Session,
flavor: LinkerFlavor,
crate_type: config::CrateType,
codegen_results: &CodegenResults,
) {
if let Some(args) = sess.target.target.options.late_link_args.get(&flavor) {
cmd.args(args);
}
let any_dynamic_crate = crate_type == config::CrateType::Dylib
|| codegen_results.crate_info.dependency_formats.iter().any(|(ty, list)| {
*ty == crate_type && list.iter().any(|&linkage| linkage == Linkage::Dynamic)
});
if any_dynamic_crate {
if let Some(args) = sess.target.target.options.late_link_args_dynamic.get(&flavor) {
cmd.args(args);
}
} else {
if let Some(args) = sess.target.target.options.late_link_args_static.get(&flavor) {
cmd.args(args);
}
}
}
/// Add arbitrary "post-link" args defined by the target spec.
/// FIXME: Determine where exactly these args need to be inserted.
fn add_post_link_args(cmd: &mut dyn Linker, sess: &'a Session, flavor: LinkerFlavor) {
if let Some(args) = sess.target.target.options.post_link_args.get(&flavor) {
cmd.args(args);
}
}
/// Produce the linker command line containing linker path and arguments.
/// `NO-OPT-OUT` marks the arguments that cannot be removed from the command line
/// by the user without creating a custom target specification.
fn linker_with_args<'a, B: ArchiveBuilder<'a>>(
path: &Path,
flavor: LinkerFlavor,
@ -1205,15 +1273,8 @@ fn linker_with_args<'a, B: ArchiveBuilder<'a>>(
assert!(base_cmd.get_args().is_empty() || sess.target.target.target_vendor == "uwp");
let cmd = &mut *codegen_results.linker_info.to_linker(base_cmd, &sess, flavor, target_cpu);
if let Some(args) = sess.target.target.options.pre_link_args.get(&flavor) {
cmd.args(args);
}
if let Some(args) = sess.target.target.options.pre_link_args_crt.get(&flavor) {
if sess.crt_static(Some(crate_type)) {
cmd.args(args);
}
}
cmd.args(&sess.opts.debugging_opts.pre_link_args);
// NO-OPT-OUT
add_pre_link_args(cmd, sess, flavor, crate_type);
if sess.target.target.options.is_like_fuchsia {
let prefix = match sess.opts.debugging_opts.sanitizer {
@ -1294,16 +1355,19 @@ fn linker_with_args<'a, B: ArchiveBuilder<'a>>(
cmd.gc_sections(keep_metadata);
}
let attr_link_args = codegen_results.crate_info.link_args.iter();
let user_link_args = sess.opts.cg.link_args.iter().chain(attr_link_args);
if crate_type == config::CrateType::Executable {
let mut position_independent_executable = false;
if t.options.position_independent_executables {
if is_pic(sess)
&& !sess.crt_static(Some(crate_type))
&& !user_link_args.clone().any(|x| x == "-static")
&& !sess
.opts
.cg
.link_args
.iter()
.chain(&*codegen_results.crate_info.link_args)
.any(|x| x == "-static")
{
position_independent_executable = true;
}
@ -1432,35 +1496,18 @@ fn linker_with_args<'a, B: ArchiveBuilder<'a>>(
cmd.args(&rpath::get_rpath_flags(&mut rpath_config));
}
// Finally add all the linker arguments provided on the command line along
// with any #[link_args] attributes found inside the crate
cmd.args(user_link_args);
add_user_defined_link_args(cmd, sess, codegen_results);
cmd.finalize();
if let Some(args) = sess.target.target.options.late_link_args.get(&flavor) {
cmd.args(args);
}
let any_dynamic_crate = crate_type == config::CrateType::Dylib
|| codegen_results.crate_info.dependency_formats.iter().any(|(ty, list)| {
*ty == crate_type && list.iter().any(|&linkage| linkage == Linkage::Dynamic)
});
if any_dynamic_crate {
if let Some(args) = sess.target.target.options.late_link_args_dynamic.get(&flavor) {
cmd.args(args);
}
} else {
if let Some(args) = sess.target.target.options.late_link_args_static.get(&flavor) {
cmd.args(args);
}
}
// NO-OPT-OUT
add_late_link_args(cmd, sess, flavor, crate_type, codegen_results);
// NO-OPT-OUT
add_post_link_objects(cmd, sess, crate_type);
if let Some(args) = sess.target.target.options.post_link_args.get(&flavor) {
cmd.args(args);
}
// NO-OPT-OUT
add_post_link_args(cmd, sess, flavor);
cmd.take_cmd()
}