bjoernager/rust
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Implement cfg(target_abi) (RFC 2992)

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Add an `abi` field to `TargetOptions`, defaulting to "". Support using
`cfg(target_abi = "...")` for conditional compilation on that field.

Gated by `feature(cfg_target_abi)`.

Add a test for `target_abi`, and a test for the feature gate.

Add `target_abi` to tidy as a platform-specific cfg.

This does not add an abi to any existing target.
This commit is contained in:
Josh Triplett 2021-07-06 20:54:54 -07:00
parent c0bd5a584d
commit 84d6e8aed3
9 changed files with 76 additions and 1 deletions
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4
compiler/rustc_session/src/config.rs
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@ -805,6 +805,7 @@ fn default_configuration(sess: &Session) -> CrateConfig {
let wordsz = sess.target.pointer_width.to_string();
let os = &sess.target.os;
let env = &sess.target.env;
let abi = &sess.target.abi;
let vendor = &sess.target.vendor;
let min_atomic_width = sess.target.min_atomic_width();
let max_atomic_width = sess.target.max_atomic_width();
@ -814,7 +815,7 @@ fn default_configuration(sess: &Session) -> CrateConfig {
});
let mut ret = FxHashSet::default();
ret.reserve(6); // the minimum number of insertions
ret.reserve(7); // the minimum number of insertions
// Target bindings.
ret.insert((sym::target_os, Some(Symbol::intern(os))));
for fam in &sess.target.families {
@ -829,6 +830,7 @@ fn default_configuration(sess: &Session) -> CrateConfig {
ret.insert((sym::target_endian, Some(Symbol::intern(end.as_str()))));
ret.insert((sym::target_pointer_width, Some(Symbol::intern(&wordsz))));
ret.insert((sym::target_env, Some(Symbol::intern(env))));
ret.insert((sym::target_abi, Some(Symbol::intern(abi))));
ret.insert((sym::target_vendor, Some(Symbol::intern(vendor))));
if sess.target.has_elf_tls {
ret.insert((sym::target_thread_local, None));