ecc6c39e87
This commit is an implementation of [RFC 1681] which adds support to the compiler for first-class user-define custom `#[derive]` modes with a far more stable API than plugins have today. [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md The main features added by this commit are: * A new `rustc-macro` crate-type. This crate type represents one which will provide custom `derive` implementations and perhaps eventually flower into the implementation of macros 2.0 as well. * A new `rustc_macro` crate in the standard distribution. This crate will provide the runtime interface between macro crates and the compiler. The API here is particularly conservative right now but has quite a bit of room to expand into any manner of APIs required by macro authors. * The ability to load new derive modes through the `#[macro_use]` annotations on other crates. All support added here is gated behind the `rustc_macro` feature gate, both for the library support (the `rustc_macro` crate) as well as the language features. There are a few minor differences from the implementation outlined in the RFC, such as the `rustc_macro` crate being available as a dylib and all symbols are `dlsym`'d directly instead of having a shim compiled. These should only affect the implementation, however, not the public interface. This commit also ended up touching a lot of code related to `#[derive]`, making a few notable changes: * Recognized derive attributes are no longer desugared to `derive_Foo`. Wasn't sure how to keep this behavior and *not* expose it to custom derive. * Derive attributes no longer have access to unstable features by default, they have to opt in on a granular level. * The `derive(Copy,Clone)` optimization is now done through another "obscure attribute" which is just intended to ferry along in the compiler that such an optimization is possible. The `derive(PartialEq,Eq)` optimization was also updated to do something similar. --- One part of this PR which needs to be improved before stabilizing are the errors and exact interfaces here. The error messages are relatively poor quality and there are surprising spects of this such as `#[derive(PartialEq, Eq, MyTrait)]` not working by default. The custom attributes added by the compiler end up becoming unstable again when going through a custom impl. Hopefully though this is enough to start allowing experimentation on crates.io! syntax-[breaking-change]
228 lines
9.1 KiB
Makefile
228 lines
9.1 KiB
Makefile
# Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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# file at the top-level directory of this distribution and at
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# http://rust-lang.org/COPYRIGHT.
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#
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# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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# option. This file may not be copied, modified, or distributed
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# except according to those terms.
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################################################################################
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# Rust's standard distribution of crates and tools
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#
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# The crates outlined below are the standard distribution of libraries provided
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# in a rust installation. These rules are meant to abstract over the
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# dependencies (both native and rust) of crates and basically generate all the
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# necessary makefile rules necessary to build everything.
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#
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# Here's an explanation of the variables below
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#
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# TARGET_CRATES
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# This list of crates will be built for all targets, including
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# cross-compiled targets
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#
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# HOST_CRATES
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# This list of crates will be compiled for only host targets. Note that
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# this set is explicitly *not* a subset of TARGET_CRATES, but rather it is
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# a disjoint set. Nothing in the TARGET_CRATES set can depend on crates in
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# the HOST_CRATES set, but the HOST_CRATES set can depend on target
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# crates.
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#
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# TOOLS
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# A list of all tools which will be built as part of the compilation
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# process. It is currently assumed that most tools are built through
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# src/driver/driver.rs with a particular configuration (there's a
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# corresponding library providing the implementation)
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#
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# DEPS_<crate>
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# These lists are the dependencies of the <crate> that is to be built.
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# Rust dependencies are listed bare (i.e. std) and native
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# dependencies have a "native:" prefix (i.e. native:hoedown). All deps
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# will be built before the crate itself is built.
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#
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# TOOL_DEPS_<tool>/TOOL_SOURCE_<tool>
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# Similar to the DEPS variable, this is the library crate dependencies
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# list for tool as well as the source file for the specified tool
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#
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# You shouldn't need to modify much other than these variables. Crates are
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# automatically generated for all stage/host/target combinations.
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################################################################################
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TARGET_CRATES := libc std term \
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getopts collections test rand \
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core alloc \
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rustc_unicode rustc_bitflags \
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alloc_system alloc_jemalloc \
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panic_abort panic_unwind unwind
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RUSTC_CRATES := rustc rustc_typeck rustc_mir rustc_borrowck rustc_resolve rustc_driver \
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rustc_trans rustc_back rustc_llvm rustc_privacy rustc_lint \
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rustc_data_structures rustc_platform_intrinsics rustc_errors \
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rustc_plugin rustc_metadata rustc_passes rustc_save_analysis \
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rustc_const_eval rustc_const_math rustc_incremental rustc_macro
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HOST_CRATES := syntax syntax_ext proc_macro syntax_pos $(RUSTC_CRATES) rustdoc fmt_macros \
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flate arena graphviz rbml log serialize
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TOOLS := compiletest rustdoc rustc rustbook error_index_generator
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DEPS_core :=
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DEPS_alloc := core libc alloc_system
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DEPS_alloc_system := core libc
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DEPS_alloc_jemalloc := core libc native:jemalloc
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DEPS_collections := core alloc rustc_unicode
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DEPS_libc := core
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DEPS_rand := core
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DEPS_rustc_bitflags := core
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DEPS_rustc_unicode := core
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DEPS_panic_abort := libc alloc
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DEPS_panic_unwind := libc alloc unwind
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DEPS_unwind := libc
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# FIXME(stage0): change this to just `RUSTFLAGS_panic_abort := ...`
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RUSTFLAGS1_panic_abort := -C panic=abort
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RUSTFLAGS2_panic_abort := -C panic=abort
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RUSTFLAGS3_panic_abort := -C panic=abort
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DEPS_std := core libc rand alloc collections rustc_unicode \
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native:backtrace \
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alloc_system panic_abort panic_unwind unwind
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DEPS_arena := std
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DEPS_glob := std
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DEPS_flate := std native:miniz
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DEPS_fmt_macros = std
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DEPS_getopts := std
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DEPS_graphviz := std
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DEPS_log := std
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DEPS_num := std
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DEPS_rbml := std log serialize
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DEPS_serialize := std log
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DEPS_term := std
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DEPS_test := std getopts term native:rust_test_helpers
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DEPS_syntax := std term serialize log arena libc rustc_bitflags rustc_unicode rustc_errors syntax_pos
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DEPS_syntax_ext := syntax syntax_pos rustc_errors fmt_macros rustc_macro
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DEPS_proc_macro := syntax syntax_pos rustc_plugin log
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DEPS_syntax_pos := serialize
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DEPS_rustc_const_math := std syntax log serialize
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DEPS_rustc_const_eval := rustc_const_math rustc syntax log serialize \
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rustc_back graphviz syntax_pos
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DEPS_rustc := syntax fmt_macros flate arena serialize getopts rbml \
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log graphviz rustc_llvm rustc_back rustc_data_structures\
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rustc_const_math syntax_pos rustc_errors
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DEPS_rustc_back := std syntax flate log libc
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DEPS_rustc_borrowck := rustc log graphviz syntax syntax_pos rustc_errors rustc_mir
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DEPS_rustc_data_structures := std log serialize libc
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DEPS_rustc_driver := arena flate getopts graphviz libc rustc rustc_back rustc_borrowck \
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rustc_typeck rustc_mir rustc_resolve log syntax serialize rustc_llvm \
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rustc_trans rustc_privacy rustc_lint rustc_plugin \
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rustc_metadata syntax_ext proc_macro \
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rustc_passes rustc_save_analysis rustc_const_eval \
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rustc_incremental syntax_pos rustc_errors rustc_macro
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DEPS_rustc_errors := log libc serialize syntax_pos
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DEPS_rustc_lint := rustc log syntax syntax_pos rustc_const_eval
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DEPS_rustc_llvm := native:rustllvm libc std rustc_bitflags
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DEPS_rustc_macro := std syntax
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DEPS_rustc_metadata := rustc syntax syntax_pos rustc_errors rbml rustc_const_math \
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rustc_macro syntax_ext
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DEPS_rustc_passes := syntax syntax_pos rustc core rustc_const_eval rustc_errors
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DEPS_rustc_mir := rustc syntax syntax_pos rustc_const_math rustc_const_eval rustc_bitflags
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DEPS_rustc_resolve := arena rustc log syntax syntax_pos rustc_errors
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DEPS_rustc_platform_intrinsics := std
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DEPS_rustc_plugin := rustc rustc_metadata syntax syntax_pos rustc_errors
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DEPS_rustc_privacy := rustc log syntax syntax_pos
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DEPS_rustc_trans := arena flate getopts graphviz libc rustc rustc_back \
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log syntax serialize rustc_llvm rustc_platform_intrinsics \
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rustc_const_math rustc_const_eval rustc_incremental rustc_errors syntax_pos
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DEPS_rustc_incremental := rbml rustc syntax_pos serialize rustc_data_structures
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DEPS_rustc_save_analysis := rustc log syntax syntax_pos serialize
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DEPS_rustc_typeck := rustc syntax syntax_pos rustc_platform_intrinsics rustc_const_math \
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rustc_const_eval rustc_errors
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DEPS_rustdoc := rustc rustc_driver native:hoedown serialize getopts test \
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rustc_lint rustc_const_eval syntax_pos rustc_data_structures
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TOOL_DEPS_compiletest := test getopts log serialize
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TOOL_DEPS_rustdoc := rustdoc
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TOOL_DEPS_rustc := rustc_driver
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TOOL_DEPS_rustbook := std rustdoc
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TOOL_DEPS_error_index_generator := rustdoc syntax serialize
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TOOL_SOURCE_compiletest := $(S)src/tools/compiletest/src/main.rs
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TOOL_SOURCE_rustdoc := $(S)src/driver/driver.rs
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TOOL_SOURCE_rustc := $(S)src/driver/driver.rs
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TOOL_SOURCE_rustbook := $(S)src/tools/rustbook/main.rs
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TOOL_SOURCE_error_index_generator := $(S)src/tools/error_index_generator/main.rs
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ONLY_RLIB_core := 1
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ONLY_RLIB_libc := 1
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ONLY_RLIB_alloc := 1
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ONLY_RLIB_rand := 1
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ONLY_RLIB_collections := 1
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ONLY_RLIB_rustc_unicode := 1
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ONLY_RLIB_rustc_bitflags := 1
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ONLY_RLIB_alloc_system := 1
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ONLY_RLIB_alloc_jemalloc := 1
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ONLY_RLIB_panic_unwind := 1
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ONLY_RLIB_panic_abort := 1
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ONLY_RLIB_unwind := 1
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TARGET_SPECIFIC_alloc_jemalloc := 1
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# Documented-by-default crates
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DOC_CRATES := std alloc collections core libc rustc_unicode
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ifeq ($(CFG_DISABLE_JEMALLOC),)
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RUSTFLAGS_rustc_back := --cfg 'feature="jemalloc"'
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endif
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################################################################################
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# You should not need to edit below this line
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################################################################################
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CRATES := $(TARGET_CRATES) $(HOST_CRATES)
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# This macro creates some simple definitions for each crate being built, just
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# some munging of all of the parameters above.
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#
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# $(1) is the crate to generate variables for
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define RUST_CRATE
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CRATEFILE_$(1) := $$(SREL)src/lib$(1)/lib.rs
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RSINPUTS_$(1) := $$(call rwildcard,$(S)src/lib$(1)/,*.rs)
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NATIVE_DEPS_$(1) := $$(patsubst native:%,%,$$(filter native:%,$$(DEPS_$(1))))
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endef
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$(foreach crate,$(CRATES),$(eval $(call RUST_CRATE,$(crate))))
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# $(1) - crate
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# $(2) - target
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define RUST_CRATE_DEPS
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RUST_DEPS_$(1)_T_$(2) := $$(filter-out native:%,$$(DEPS_$(1)))
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endef
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$(foreach target,$(CFG_TARGET),\
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$(foreach crate,$(CRATES),$(eval $(call RUST_CRATE_DEPS,$(crate),$(target)))))
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# $(1) - target
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# $(2) - crate
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define DEFINE_TARGET_CRATES
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ifndef TARGET_SPECIFIC_$(2)
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TARGET_CRATES_$(1) += $(2)
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endif
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endef
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$(foreach target,$(CFG_TARGET),\
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$(foreach crate,$(TARGET_CRATES),\
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$(eval $(call DEFINE_TARGET_CRATES,$(target),$(crate)))))
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# Similar to the macro above for crates, this macro is for tools
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#
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# $(1) is the crate to generate variables for
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define RUST_TOOL
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TOOL_INPUTS_$(1) := $$(call rwildcard,$$(dir $$(TOOL_SOURCE_$(1))),*.rs)
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endef
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$(foreach crate,$(TOOLS),$(eval $(call RUST_TOOL,$(crate))))
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CRATEFILE_libc := $(SREL)src/liblibc/src/lib.rs
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RUSTFLAGS_libc := --cfg stdbuild
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