Add option to use the new symbol mangling in rustc/std

This commit is contained in:
Mark Rousskov 2020-08-12 18:42:42 -04:00
parent 1275cc15d6
commit e09cca09ac
3 changed files with 11 additions and 0 deletions

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@ -475,6 +475,10 @@
# This only applies from stage 1 onwards, and only for Windows targets.
#control-flow-guard = false
# Enable symbol-mangling-version v0. This can be helpful when profiling rustc,
# as generics will be preserved in symbols (rather than erased into opaque T).
#new-symbol-mangling = false
# =============================================================================
# Options for specific targets
#

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@ -859,6 +859,10 @@ impl<'a> Builder<'a> {
rustflags.arg("--cfg=bootstrap");
}
if self.config.rust_new_symbol_mangling {
rustflags.arg("-Zsymbol-mangling-version=v0");
}
// FIXME: It might be better to use the same value for both `RUSTFLAGS` and `RUSTDOCFLAGS`,
// but this breaks CI. At the very least, stage0 `rustdoc` needs `--cfg bootstrap`. See
// #71458.

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@ -112,6 +112,7 @@ pub struct Config {
pub rust_verify_llvm_ir: bool,
pub rust_thin_lto_import_instr_limit: Option<u32>,
pub rust_remap_debuginfo: bool,
pub rust_new_symbol_mangling: bool,
pub build: TargetSelection,
pub hosts: Vec<TargetSelection>,
@ -410,6 +411,7 @@ struct Rust {
test_compare_mode: Option<bool>,
llvm_libunwind: Option<bool>,
control_flow_guard: Option<bool>,
new_symbol_mangling: Option<bool>,
}
/// TOML representation of how each build target is configured.
@ -637,6 +639,7 @@ impl Config {
debuginfo_level_tests = rust.debuginfo_level_tests;
optimize = rust.optimize;
ignore_git = rust.ignore_git;
set(&mut config.rust_new_symbol_mangling, rust.new_symbol_mangling);
set(&mut config.rust_optimize_tests, rust.optimize_tests);
set(&mut config.codegen_tests, rust.codegen_tests);
set(&mut config.rust_rpath, rust.rpath);