| // Copyright 2016 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| //! Compiles the `compiler-rt` library, or at least the builtins part of it. |
| //! |
| //! Note that while compiler-rt has a build system associated with it, we |
| //! specifically don't use it here. The compiler-rt build system, written in |
| //! CMake, is actually *very* difficult to work with in terms of getting it to |
| //! compile on all the relevant platforms we want it to compile on. In the end |
| //! it became so much pain to work with local patches, work around the oddities |
| //! of the build system, etc, that we're just building everything by hand now. |
| //! |
| //! In general compiler-rt is just a bunch of intrinsics that are in practice |
| //! *very* stable. We just need to make sure that all the relevant functions and |
| //! such are compiled somewhere and placed in an object file somewhere. |
| //! Eventually, these should all be written in Rust! |
| //! |
| //! So below you'll find a listing of every single file in the compiler-rt repo |
| //! that we're compiling. We just reach in and compile with the `gcc` crate |
| //! which should have all the relevant flags and such already configured. |
| //! |
| //! The risk here is that if we update compiler-rt we may need to compile some |
| //! new intrinsics, but to be honest we surely don't use all of the intrinsics |
| //! listed below today so the likelihood of us actually needing a new intrinsic |
| //! is quite low. The failure case is also just that someone reports a link |
| //! error (if any) and then we just add it to the list. Overall, that cost is |
| //! far far less than working with compiler-rt's build system over time. |
| |
| extern crate gcc; |
| |
| use std::collections::BTreeMap; |
| use std::env; |
| use std::path::Path; |
| |
| struct Sources { |
| // SYMBOL -> PATH TO SOURCE |
| map: BTreeMap<&'static str, &'static str>, |
| } |
| |
| impl Sources { |
| fn new() -> Sources { |
| Sources { map: BTreeMap::new() } |
| } |
| |
| fn extend(&mut self, sources: &[&'static str]) { |
| // NOTE Some intrinsics have both a generic implementation (e.g. |
| // `floatdidf.c`) and an arch optimized implementation |
| // (`x86_64/floatdidf.c`). In those cases, we keep the arch optimized |
| // implementation and discard the generic implementation. If we don't |
| // and keep both implementations, the linker will yell at us about |
| // duplicate symbols! |
| for &src in sources { |
| let symbol = Path::new(src).file_stem().unwrap().to_str().unwrap(); |
| if src.contains("/") { |
| // Arch-optimized implementation (preferred) |
| self.map.insert(symbol, src); |
| } else { |
| // Generic implementation |
| if !self.map.contains_key(symbol) { |
| self.map.insert(symbol, src); |
| } |
| } |
| } |
| } |
| } |
| |
| fn main() { |
| let target = env::var("TARGET").expect("TARGET was not set"); |
| |
| // Emscripten's runtime includes all the builtins |
| if target.contains("emscripten") { |
| return; |
| } |
| |
| let cfg = &mut gcc::Config::new(); |
| |
| if target.contains("msvc") { |
| // Don't pull in extra libraries on MSVC |
| cfg.flag("/Zl"); |
| |
| // Emulate C99 and C++11's __func__ for MSVC prior to 2013 CTP |
| cfg.define("__func__", Some("__FUNCTION__")); |
| } else { |
| // Turn off various features of gcc and such, mostly copying |
| // compiler-rt's build system already |
| cfg.flag("-fno-builtin"); |
| cfg.flag("-fvisibility=hidden"); |
| cfg.flag("-fomit-frame-pointer"); |
| cfg.flag("-ffreestanding"); |
| cfg.define("VISIBILITY_HIDDEN", None); |
| } |
| |
| let mut sources = Sources::new(); |
| sources.extend(&["absvdi2.c", |
| "absvsi2.c", |
| "adddf3.c", |
| "addsf3.c", |
| "addvdi3.c", |
| "addvsi3.c", |
| "apple_versioning.c", |
| "ashldi3.c", |
| "ashrdi3.c", |
| "clzdi2.c", |
| "clzsi2.c", |
| "cmpdi2.c", |
| "comparedf2.c", |
| "comparesf2.c", |
| "ctzdi2.c", |
| "ctzsi2.c", |
| "divdc3.c", |
| "divdf3.c", |
| "divdi3.c", |
| "divmoddi4.c", |
| "divmodsi4.c", |
| "divsc3.c", |
| "divsf3.c", |
| "divsi3.c", |
| "divxc3.c", |
| "extendsfdf2.c", |
| "extendhfsf2.c", |
| "ffsdi2.c", |
| "fixdfdi.c", |
| "fixdfsi.c", |
| "fixsfdi.c", |
| "fixsfsi.c", |
| "fixunsdfdi.c", |
| "fixunsdfsi.c", |
| "fixunssfdi.c", |
| "fixunssfsi.c", |
| "fixunsxfdi.c", |
| "fixunsxfsi.c", |
| "fixxfdi.c", |
| "floatdidf.c", |
| "floatdisf.c", |
| "floatdixf.c", |
| "floatsidf.c", |
| "floatsisf.c", |
| "floatundidf.c", |
| "floatundisf.c", |
| "floatundixf.c", |
| "floatunsidf.c", |
| "floatunsisf.c", |
| "int_util.c", |
| "lshrdi3.c", |
| "moddi3.c", |
| "modsi3.c", |
| "muldc3.c", |
| "muldf3.c", |
| "muldi3.c", |
| "mulodi4.c", |
| "mulosi4.c", |
| "muloti4.c", |
| "mulsc3.c", |
| "mulsf3.c", |
| "mulvdi3.c", |
| "mulvsi3.c", |
| "mulxc3.c", |
| "negdf2.c", |
| "negdi2.c", |
| "negsf2.c", |
| "negvdi2.c", |
| "negvsi2.c", |
| "paritydi2.c", |
| "paritysi2.c", |
| "popcountdi2.c", |
| "popcountsi2.c", |
| "powidf2.c", |
| "powisf2.c", |
| "powixf2.c", |
| "subdf3.c", |
| "subsf3.c", |
| "subvdi3.c", |
| "subvsi3.c", |
| "truncdfhf2.c", |
| "truncdfsf2.c", |
| "truncsfhf2.c", |
| "ucmpdi2.c", |
| "udivdi3.c", |
| "udivmoddi4.c", |
| "udivmodsi4.c", |
| "udivsi3.c", |
| "umoddi3.c", |
| "umodsi3.c"]); |
| |
| if !target.contains("ios") { |
| sources.extend(&["absvti2.c", |
| "addvti3.c", |
| "ashlti3.c", |
| "ashrti3.c", |
| "clzti2.c", |
| "cmpti2.c", |
| "ctzti2.c", |
| "divti3.c", |
| "ffsti2.c", |
| "fixdfti.c", |
| "fixsfti.c", |
| "fixunsdfti.c", |
| "fixunssfti.c", |
| "fixunsxfti.c", |
| "fixxfti.c", |
| "floattidf.c", |
| "floattisf.c", |
| "floattixf.c", |
| "floatuntidf.c", |
| "floatuntisf.c", |
| "floatuntixf.c", |
| "lshrti3.c", |
| "modti3.c", |
| "multi3.c", |
| "mulvti3.c", |
| "negti2.c", |
| "negvti2.c", |
| "parityti2.c", |
| "popcountti2.c", |
| "subvti3.c", |
| "ucmpti2.c", |
| "udivmodti4.c", |
| "udivti3.c", |
| "umodti3.c"]); |
| } |
| |
| if target.contains("apple") { |
| sources.extend(&["atomic_flag_clear.c", |
| "atomic_flag_clear_explicit.c", |
| "atomic_flag_test_and_set.c", |
| "atomic_flag_test_and_set_explicit.c", |
| "atomic_signal_fence.c", |
| "atomic_thread_fence.c"]); |
| } |
| |
| if target.contains("msvc") { |
| if target.contains("x86_64") { |
| sources.extend(&["x86_64/floatdidf.c", "x86_64/floatdisf.c", "x86_64/floatdixf.c"]); |
| } |
| } else { |
| if !target.contains("freebsd") { |
| sources.extend(&["gcc_personality_v0.c"]); |
| } |
| |
| if target.contains("x86_64") { |
| sources.extend(&["x86_64/chkstk.S", |
| "x86_64/chkstk2.S", |
| "x86_64/floatdidf.c", |
| "x86_64/floatdisf.c", |
| "x86_64/floatdixf.c", |
| "x86_64/floatundidf.S", |
| "x86_64/floatundisf.S", |
| "x86_64/floatundixf.S"]); |
| } |
| |
| if target.contains("i386") || target.contains("i586") || target.contains("i686") { |
| sources.extend(&["i386/ashldi3.S", |
| "i386/ashrdi3.S", |
| "i386/chkstk.S", |
| "i386/chkstk2.S", |
| "i386/divdi3.S", |
| "i386/floatdidf.S", |
| "i386/floatdisf.S", |
| "i386/floatdixf.S", |
| "i386/floatundidf.S", |
| "i386/floatundisf.S", |
| "i386/floatundixf.S", |
| "i386/lshrdi3.S", |
| "i386/moddi3.S", |
| "i386/muldi3.S", |
| "i386/udivdi3.S", |
| "i386/umoddi3.S"]); |
| } |
| } |
| |
| if target.contains("arm") && !target.contains("ios") { |
| sources.extend(&["arm/aeabi_cdcmp.S", |
| "arm/aeabi_cdcmpeq_check_nan.c", |
| "arm/aeabi_cfcmp.S", |
| "arm/aeabi_cfcmpeq_check_nan.c", |
| "arm/aeabi_dcmp.S", |
| "arm/aeabi_div0.c", |
| "arm/aeabi_drsub.c", |
| "arm/aeabi_fcmp.S", |
| "arm/aeabi_frsub.c", |
| "arm/aeabi_idivmod.S", |
| "arm/aeabi_ldivmod.S", |
| "arm/aeabi_memcmp.S", |
| "arm/aeabi_memcpy.S", |
| "arm/aeabi_memmove.S", |
| "arm/aeabi_memset.S", |
| "arm/aeabi_uidivmod.S", |
| "arm/aeabi_uldivmod.S", |
| "arm/bswapdi2.S", |
| "arm/bswapsi2.S", |
| "arm/clzdi2.S", |
| "arm/clzsi2.S", |
| "arm/comparesf2.S", |
| "arm/divmodsi4.S", |
| "arm/divsi3.S", |
| "arm/modsi3.S", |
| "arm/switch16.S", |
| "arm/switch32.S", |
| "arm/switch8.S", |
| "arm/switchu8.S", |
| "arm/sync_synchronize.S", |
| "arm/udivmodsi4.S", |
| "arm/udivsi3.S", |
| "arm/umodsi3.S"]); |
| } |
| |
| if target.contains("armv7") { |
| sources.extend(&["arm/sync_fetch_and_add_4.S", |
| "arm/sync_fetch_and_add_8.S", |
| "arm/sync_fetch_and_and_4.S", |
| "arm/sync_fetch_and_and_8.S", |
| "arm/sync_fetch_and_max_4.S", |
| "arm/sync_fetch_and_max_8.S", |
| "arm/sync_fetch_and_min_4.S", |
| "arm/sync_fetch_and_min_8.S", |
| "arm/sync_fetch_and_nand_4.S", |
| "arm/sync_fetch_and_nand_8.S", |
| "arm/sync_fetch_and_or_4.S", |
| "arm/sync_fetch_and_or_8.S", |
| "arm/sync_fetch_and_sub_4.S", |
| "arm/sync_fetch_and_sub_8.S", |
| "arm/sync_fetch_and_umax_4.S", |
| "arm/sync_fetch_and_umax_8.S", |
| "arm/sync_fetch_and_umin_4.S", |
| "arm/sync_fetch_and_umin_8.S", |
| "arm/sync_fetch_and_xor_4.S", |
| "arm/sync_fetch_and_xor_8.S"]); |
| } |
| |
| if target.contains("eabihf") { |
| sources.extend(&["arm/adddf3vfp.S", |
| "arm/addsf3vfp.S", |
| "arm/divdf3vfp.S", |
| "arm/divsf3vfp.S", |
| "arm/eqdf2vfp.S", |
| "arm/eqsf2vfp.S", |
| "arm/extendsfdf2vfp.S", |
| "arm/fixdfsivfp.S", |
| "arm/fixsfsivfp.S", |
| "arm/fixunsdfsivfp.S", |
| "arm/fixunssfsivfp.S", |
| "arm/floatsidfvfp.S", |
| "arm/floatsisfvfp.S", |
| "arm/floatunssidfvfp.S", |
| "arm/floatunssisfvfp.S", |
| "arm/gedf2vfp.S", |
| "arm/gesf2vfp.S", |
| "arm/gtdf2vfp.S", |
| "arm/gtsf2vfp.S", |
| "arm/ledf2vfp.S", |
| "arm/lesf2vfp.S", |
| "arm/ltdf2vfp.S", |
| "arm/ltsf2vfp.S", |
| "arm/muldf3vfp.S", |
| "arm/mulsf3vfp.S", |
| "arm/negdf2vfp.S", |
| "arm/negsf2vfp.S", |
| "arm/nedf2vfp.S", |
| "arm/nesf2vfp.S", |
| "arm/restore_vfp_d8_d15_regs.S", |
| "arm/save_vfp_d8_d15_regs.S", |
| "arm/subdf3vfp.S", |
| "arm/subsf3vfp.S", |
| "arm/truncdfsf2vfp.S", |
| "arm/unorddf2vfp.S", |
| "arm/unordsf2vfp.S"]); |
| } |
| |
| if target.contains("aarch64") { |
| sources.extend(&["comparetf2.c", |
| "extenddftf2.c", |
| "extendsftf2.c", |
| "fixtfdi.c", |
| "fixtfsi.c", |
| "fixtfti.c", |
| "fixunstfdi.c", |
| "fixunstfsi.c", |
| "fixunstfti.c", |
| "floatditf.c", |
| "floatsitf.c", |
| "floatunditf.c", |
| "floatunsitf.c", |
| "multc3.c", |
| "trunctfdf2.c", |
| "trunctfsf2.c"]); |
| } |
| |
| for src in sources.map.values() { |
| cfg.file(Path::new("../compiler-rt/lib/builtins").join(src)); |
| } |
| |
| cfg.compile("libcompiler-rt.a"); |
| } |