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rust: Only pass "-lstatic" for rlibs.

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Passing '-lstatic' for dylib static dependencies results in some
unexpected bloat as the static libraries are included as
whole-archives.

For now, limit this to rlibs while we investigate.

Bug: 175886967
Bug: 179122837
Test: cd system/bt/; mma
Test: Checked size of dylibs.
Change-Id: Id8328e95771e2ca8503bc8df35248b1c39cabc8e
This commit is contained in:
Ivan Lozano 2021-02-05 12:27:08 -05:00
parent b3f9025b6e
commit fb6f36f3e4
2 changed files with 13 additions and 9 deletions
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19
rust/rust.go
View file

@ -896,14 +896,17 @@ func (mod *Module) depsToPaths(ctx android.ModuleContext) PathDeps {
exportDep := false
switch {
case cc.IsStaticDepTag(depTag):
// Link cc static libraries using "-lstatic" so rustc can reason about how to handle these
// (for example, bundling them into rlibs).
//
// rustc does not support linking libraries with the "-l" flag unless they are prefixed by "lib".
// If we need to link a library that isn't prefixed by "lib", we'll just link to it directly through
// linkObjects; such a library may need to be redeclared by static dependents.
if libName, ok := libNameFromFilePath(linkObject.Path()); ok {
depPaths.depFlags = append(depPaths.depFlags, "-lstatic="+libName)
// Only pass -lstatic for rlibs as it results in dylib bloat.
if lib, ok := ctx.Module().(*Module).compiler.(libraryInterface); ok && lib.rlib() {
// Link cc static libraries using "-lstatic" so rustc can reason about how to handle these
// (for example, bundling them into rlibs).
//
// rustc does not support linking libraries with the "-l" flag unless they are prefixed by "lib".
// If we need to link a library that isn't prefixed by "lib", we'll just link to it directly through
// linkObjects; such a library may need to be redeclared by static dependents.
if libName, ok := libNameFromFilePath(linkObject.Path()); ok {
depPaths.depFlags = append(depPaths.depFlags, "-lstatic="+libName)
}
}
// Add this to linkObjects to pass the library directly to the linker as well. This propagates

3
rust/rust_test.go
View file

@ -213,6 +213,7 @@ func TestDepsTracking(t *testing.T) {
name: "librlib",
srcs: ["foo.rs"],
crate_name: "rlib",
static_libs: ["libstatic"],
}
rust_proc_macro {
name: "libpm",
@ -230,7 +231,7 @@ func TestDepsTracking(t *testing.T) {
}
`)
module := ctx.ModuleForTests("fizz-buzz", "linux_glibc_x86_64").Module().(*Module)
rustc := ctx.ModuleForTests("fizz-buzz", "linux_glibc_x86_64").Rule("rustc")
rustc := ctx.ModuleForTests("librlib", "linux_glibc_x86_64_rlib_rlib-std").Rule("rustc")
// Since dependencies are added to AndroidMk* properties, we can check these to see if they've been picked up.
if !android.InList("libdylib", module.Properties.AndroidMkDylibs) {