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// Copyright 2019 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package rust
import (
"strings"
"github.com/google/blueprint"
"android/soong/android"
)
var (
_ = pctx.SourcePathVariable("rustcCmd", "${config.RustBin}/rustc")
rustc = pctx.AndroidStaticRule("rustc",
blueprint.RuleParams{
Command: "$rustcCmd " +
"-C linker=${config.RustLinker} " +
"-C link-args=\"${crtBegin} ${config.RustLinkerArgs} ${linkFlags} ${crtEnd}\" " +
"--emit link -o $out --emit dep-info=$out.d $in ${libFlags} $rustcFlags",
CommandDeps: []string{"$rustcCmd"},
// Rustc deps-info writes out make compatible dep files: https://github.com/rust-lang/rust/issues/7633
Deps: blueprint.DepsGCC,
Depfile: "$out.d",
},
"rustcFlags", "linkFlags", "libFlags", "crtBegin", "crtEnd")
)
func init() {
}
func TransformSrcToBinary(ctx android.ModuleContext, mainSrc android.Path, deps PathDeps, flags Flags,
outputFile android.WritablePath, includeDirs []string) {
flags.RustFlags = append(flags.RustFlags, "-C lto")
transformSrctoCrate(ctx, mainSrc, deps, flags, outputFile, "bin", includeDirs)
}
func TransformSrctoRlib(ctx android.ModuleContext, mainSrc android.Path, deps PathDeps, flags Flags,
outputFile android.WritablePath, includeDirs []string) {
transformSrctoCrate(ctx, mainSrc, deps, flags, outputFile, "rlib", includeDirs)
}
func TransformSrctoDylib(ctx android.ModuleContext, mainSrc android.Path, deps PathDeps, flags Flags,
outputFile android.WritablePath, includeDirs []string) {
transformSrctoCrate(ctx, mainSrc, deps, flags, outputFile, "dylib", includeDirs)
}
func TransformSrctoStatic(ctx android.ModuleContext, mainSrc android.Path, deps PathDeps, flags Flags,
outputFile android.WritablePath, includeDirs []string) {
flags.RustFlags = append(flags.RustFlags, "-C lto")
transformSrctoCrate(ctx, mainSrc, deps, flags, outputFile, "staticlib", includeDirs)
}
func TransformSrctoShared(ctx android.ModuleContext, mainSrc android.Path, deps PathDeps, flags Flags,
outputFile android.WritablePath, includeDirs []string) {
flags.RustFlags = append(flags.RustFlags, "-C lto")
transformSrctoCrate(ctx, mainSrc, deps, flags, outputFile, "cdylib", includeDirs)
}
func TransformSrctoProcMacro(ctx android.ModuleContext, mainSrc android.Path, deps PathDeps,
flags Flags, outputFile android.WritablePath, includeDirs []string) {
transformSrctoCrate(ctx, mainSrc, deps, flags, outputFile, "proc-macro", includeDirs)
}
func rustLibsToPaths(libs RustLibraries) android.Paths {
var paths android.Paths
for _, lib := range libs {
paths = append(paths, lib.Path)
}
return paths
}
func transformSrctoCrate(ctx android.ModuleContext, main android.Path, deps PathDeps, flags Flags,
outputFile android.WritablePath, crate_type string, includeDirs []string) {
var inputs android.Paths
var implicits android.Paths
var libFlags, rustcFlags, linkFlags []string
crate_name := ctx.(ModuleContext).CrateName()
targetTriple := ctx.(ModuleContext).toolchain().RustTriple()
inputs = append(inputs, main)
// Collect rustc flags
rustcFlags = append(rustcFlags, flags.GlobalRustFlags...)
rustcFlags = append(rustcFlags, flags.RustFlags...)
rustcFlags = append(rustcFlags, "--crate-type="+crate_type)
if crate_name != "" {
rustcFlags = append(rustcFlags, "--crate-name="+crate_name)
}
if targetTriple != "" {
rustcFlags = append(rustcFlags, "--target="+targetTriple)
linkFlags = append(linkFlags, "-target "+targetTriple)
}
// TODO once we have static libraries in the host prebuilt .bp, this
// should be unconditionally added.
if !ctx.Host() {
// If we're on a device build, do not use an implicit sysroot
rustcFlags = append(rustcFlags, "--sysroot=/dev/null")
}
// Collect linker flags
linkFlags = append(linkFlags, flags.GlobalLinkFlags...)
linkFlags = append(linkFlags, flags.LinkFlags...)
// Collect library/crate flags
for _, lib := range deps.RLibs {
libFlags = append(libFlags, "--extern "+lib.CrateName+"="+lib.Path.String())
}
for _, lib := range deps.DyLibs {
libFlags = append(libFlags, "--extern "+lib.CrateName+"="+lib.Path.String())
}
for _, proc_macro := range deps.ProcMacros {
libFlags = append(libFlags, "--extern "+proc_macro.CrateName+"="+proc_macro.Path.String())
}
for _, path := range includeDirs {
libFlags = append(libFlags, "-L "+path)
}
// Collect dependencies
implicits = append(implicits, rustLibsToPaths(deps.RLibs)...)
implicits = append(implicits, rustLibsToPaths(deps.DyLibs)...)
implicits = append(implicits, rustLibsToPaths(deps.ProcMacros)...)
implicits = append(implicits, deps.StaticLibs...)
implicits = append(implicits, deps.SharedLibs...)
if deps.CrtBegin.Valid() {
implicits = append(implicits, deps.CrtBegin.Path(), deps.CrtEnd.Path())
}
ctx.Build(pctx, android.BuildParams{
Rule: rustc,
Description: "rustc " + main.Rel(),
Output: outputFile,
Inputs: inputs,
Implicits: implicits,
Args: map[string]string{
"rustcFlags": strings.Join(rustcFlags, " "),
"linkFlags": strings.Join(linkFlags, " "),
"libFlags": strings.Join(libFlags, " "),
"crtBegin": deps.CrtBegin.String(),
"crtEnd": deps.CrtEnd.String(),
},
})
}
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