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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=${config.RustLinker} " +
"-C link-args=\"${config.RustLinkerArgs} ${linkFlags}\" " +
"-o $out $in ${libFlags} $rustcFlags " +
"&& $rustcCmd --emit=dep-info -o $out.d $in ${libFlags} $rustcFlags",
CommandDeps: []string{"$rustcCmd"},
Depfile: "$out.d",
Deps: blueprint.DepsGCC, // Rustc deps-info writes out make compatible dep files: https://github.com/rust-lang/rust/issues/7633
},
"rustcFlags", "linkFlags", "libFlags")
)
func init() {
}
func TransformSrcToBinary(ctx android.ModuleContext, mainSrc android.Path, deps PathDeps, flags Flags, outputFile android.WritablePath, includeDirs []string) {
targetTriple := ctx.(ModuleContext).toolchain().RustTriple()
transformSrctoCrate(ctx, mainSrc, deps.RLibs, deps.DyLibs, deps.ProcMacros, deps.StaticLibs, deps.SharedLibs, flags, outputFile, "bin", includeDirs, targetTriple)
}
func TransformSrctoRlib(ctx android.ModuleContext, mainSrc android.Path, deps PathDeps, flags Flags, outputFile android.WritablePath, includeDirs []string) {
targetTriple := ctx.(ModuleContext).toolchain().RustTriple()
transformSrctoCrate(ctx, mainSrc, deps.RLibs, deps.DyLibs, deps.ProcMacros, deps.StaticLibs, deps.SharedLibs, flags, outputFile, "rlib", includeDirs, targetTriple)
}
func TransformSrctoDylib(ctx android.ModuleContext, mainSrc android.Path, deps PathDeps, flags Flags, outputFile android.WritablePath, includeDirs []string) {
targetTriple := ctx.(ModuleContext).toolchain().RustTriple()
transformSrctoCrate(ctx, mainSrc, deps.RLibs, deps.DyLibs, deps.ProcMacros, deps.StaticLibs, deps.SharedLibs, flags, outputFile, "dylib", includeDirs, targetTriple)
}
func TransformSrctoProcMacro(ctx android.ModuleContext, mainSrc android.Path, deps PathDeps, flags Flags, outputFile android.WritablePath, includeDirs []string) {
// Proc macros are compiler plugins, and thus should target the host compiler
targetTriple := ""
transformSrctoCrate(ctx, mainSrc, deps.RLibs, deps.DyLibs, deps.ProcMacros, deps.StaticLibs, deps.SharedLibs, flags, outputFile, "proc-macro", includeDirs, targetTriple)
}
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,
rlibs, dylibs, proc_macros RustLibraries, static_libs, shared_libs android.Paths, flags Flags, outputFile android.WritablePath, crate_type string, includeDirs []string, targetTriple string) {
var inputs android.Paths
var deps android.Paths
var libFlags, rustcFlags []string
crate_name := ctx.(ModuleContext).CrateName()
inputs = append(inputs, main)
// Collect rustc flags
rustcFlags = append(rustcFlags, flags.GlobalFlags...)
rustcFlags = append(rustcFlags, flags.RustFlags...)
rustcFlags = append(rustcFlags, "--crate-type="+crate_type)
rustcFlags = append(rustcFlags, "--crate-name="+crate_name)
if targetTriple != "" {
rustcFlags = append(rustcFlags, "--target="+targetTriple)
}
// Collect library/crate flags
for _, lib := range rlibs {
libFlags = append(libFlags, "--extern "+lib.CrateName+"="+lib.Path.String())
}
for _, lib := range dylibs {
libFlags = append(libFlags, "--extern "+lib.CrateName+"="+lib.Path.String())
}
for _, proc_macro := range proc_macros {
libFlags = append(libFlags, "--extern "+proc_macro.CrateName+"="+proc_macro.Path.String())
}
for _, path := range includeDirs {
libFlags = append(libFlags, "-L "+path)
}
// Collect dependencies
deps = append(deps, rustLibsToPaths(rlibs)...)
deps = append(deps, rustLibsToPaths(dylibs)...)
deps = append(deps, rustLibsToPaths(proc_macros)...)
deps = append(deps, static_libs...)
deps = append(deps, shared_libs...)
ctx.Build(pctx, android.BuildParams{
Rule: rustc,
Description: "rustc " + main.Rel(),
Output: outputFile,
Inputs: inputs,
Implicits: deps,
Args: map[string]string{
"rustcFlags": strings.Join(rustcFlags, " "),
"linkFlags": strings.Join(flags.LinkFlags, " "),
"libFlags": strings.Join(libFlags, " "),
},
})
}
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