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rustc: Add cfg(gc) and cfg(nogc).

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Needed in libcore to determine whether core::gc is being compiled with
GC on or not, which then affects various safety checks to avoid
collecting memory the GC is itself using.
This commit is contained in:
Elliott Slaughter
2012-08-28 10:58:04 -07:00
parent adf9fa229f
commit 0031617f30
1 changed files with 16 additions and 9 deletions
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25
src/rustc/driver/driver.rs
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@@ -62,6 +62,14 @@ fn default_configuration(sess: session, argv0: ~str, input: input) ->
mk(~"build_input", source_name(input))];
}
fn append_configuration(cfg: ast::crate_cfg, name: ~str) -> ast::crate_cfg {
if attr::contains_name(cfg, name) {
return cfg;
} else {
return vec::append_one(cfg, attr::mk_word_item(name));
}
}
fn build_configuration(sess: session, argv0: ~str, input: input) ->
ast::crate_cfg {
// Combine the configuration requested by the session (command line) with
@@ -69,15 +77,14 @@ fn build_configuration(sess: session, argv0: ~str, input: input) ->
let default_cfg = default_configuration(sess, argv0, input);
let user_cfg = sess.opts.cfg;
// If the user wants a test runner, then add the test cfg
let gen_cfg =
{
if sess.opts.test && !attr::contains_name(user_cfg, ~"test") {
~[attr::mk_word_item(~"test")]
} else {
~[attr::mk_word_item(~"notest")]
}
};
return vec::append(vec::append(user_cfg, gen_cfg), default_cfg);
let user_cfg = append_configuration(
user_cfg,
if sess.opts.test { ~"test" } else { ~"notest" });
// If the user requested GC, then add the GC cfg
let user_cfg = append_configuration(
user_cfg,
if sess.opts.gc { ~"gc" } else { ~"nogc" });
return vec::append(user_cfg, default_cfg);
}
// Convert strings provided as --cfg [cfgspec] into a crate_cfg