From 874ee5bede53bf0c3ff55359df5fa5b04daa32d6 Mon Sep 17 00:00:00 2001
From: Bryanskiy <ivakin.kir@gmail.com>
Date: Sat, 16 Jul 2022 19:33:54 +0300
Subject: [PATCH] add crt-static for android

---
 Cargo.lock                                    |  4 ++--
 .../rustc_target/src/spec/android_base.rs     |  2 +-
 library/std/src/lib.rs                        |  1 +
 library/std/src/sys/unix/mod.rs               |  6 ++++--
 library/unwind/build.rs                       |  7 +------
 library/unwind/src/lib.rs                     | 20 +++++++++++++++++++
 6 files changed, 29 insertions(+), 11 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index ededa7c2ecf..0d760412046 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2139,9 +2139,9 @@ checksum = "830d08ce1d1d941e6b30645f1a0eb5643013d835ce3779a5fc208261dbe10f55"
 
 [[package]]
 name = "libc"
-version = "0.2.126"
+version = "0.2.129"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "349d5a591cd28b49e1d1037471617a32ddcda5731b99419008085f72d5a53836"
+checksum = "64de3cc433455c14174d42e554d4027ee631c4d046d43e3ecc6efc4636cdc7a7"
 dependencies = [
  "rustc-std-workspace-core",
 ]
diff --git a/compiler/rustc_target/src/spec/android_base.rs b/compiler/rustc_target/src/spec/android_base.rs
index dc06597db6f..2bf83a8782a 100644
--- a/compiler/rustc_target/src/spec/android_base.rs
+++ b/compiler/rustc_target/src/spec/android_base.rs
@@ -10,6 +10,6 @@ pub fn opts() -> TargetOptions {
     // for context. (At that time, there was no `-C force-unwind-tables`, so the only solution
     // was to always emit `uwtable`).
     base.default_uwtable = true;
-    base.crt_static_respected = false;
+    base.crt_static_respected = true;
     base
 }
diff --git a/library/std/src/lib.rs b/library/std/src/lib.rs
index 6b0c0ad7c21..ebe0ccbdc0b 100644
--- a/library/std/src/lib.rs
+++ b/library/std/src/lib.rs
@@ -246,6 +246,7 @@
 #![cfg_attr(bootstrap, feature(let_chains))]
 #![feature(let_else)]
 #![feature(linkage)]
+#![feature(link_cfg)]
 #![feature(min_specialization)]
 #![feature(must_not_suspend)]
 #![feature(needs_panic_runtime)]
diff --git a/library/std/src/sys/unix/mod.rs b/library/std/src/sys/unix/mod.rs
index 3d0d91460f7..3a375093099 100644
--- a/library/std/src/sys/unix/mod.rs
+++ b/library/std/src/sys/unix/mod.rs
@@ -295,8 +295,10 @@ pub fn abort_internal() -> ! {
 
 cfg_if::cfg_if! {
     if #[cfg(target_os = "android")] {
-        #[link(name = "dl")]
-        #[link(name = "log")]
+        #[link(name = "dl", kind = "static", modifiers = "-bundle",
+            cfg(target_feature = "crt-static"))]
+        #[link(name = "dl", cfg(not(target_feature = "crt-static")))]
+        #[link(name = "log", cfg(not(target_feature = "crt-static")))]
         extern "C" {}
     } else if #[cfg(target_os = "freebsd")] {
         #[link(name = "execinfo")]
diff --git a/library/unwind/build.rs b/library/unwind/build.rs
index f88e6a924b5..126e41d1e20 100644
--- a/library/unwind/build.rs
+++ b/library/unwind/build.rs
@@ -13,13 +13,8 @@ fn main() {
         let has_unwind = build.is_flag_supported("-lunwind").expect("Unable to invoke compiler");
 
         if has_unwind {
-            println!("cargo:rustc-link-lib=unwind");
-        } else {
-            println!("cargo:rustc-link-lib=gcc");
+            println!("cargo:rustc-cfg=feature=\"system-llvm-libunwind\"");
         }
-
-        // Android's unwinding library depends on dl_iterate_phdr in `libdl`.
-        println!("cargo:rustc-link-lib=dl");
     } else if target.contains("freebsd") {
         println!("cargo:rustc-link-lib=gcc_s");
     } else if target.contains("netbsd") {
diff --git a/library/unwind/src/lib.rs b/library/unwind/src/lib.rs
index 4a6ba6e10c3..46fe50cb945 100644
--- a/library/unwind/src/lib.rs
+++ b/library/unwind/src/lib.rs
@@ -55,6 +55,26 @@ cfg_if::cfg_if! {
     }
 }
 
+#[cfg(target_os = "android")]
+cfg_if::cfg_if! {
+    if #[cfg(feature = "llvm-libunwind")] {
+        compile_error!("`llvm-libunwind` is not supported for Android targets");
+    } else if #[cfg(feature = "system-llvm-libunwind")] {
+        #[link(name = "unwind", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
+        #[link(name = "unwind", cfg(not(target_feature = "crt-static")))]
+        extern "C" {}
+    } else {
+        #[link(name = "gcc", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
+        #[link(name = "gcc", cfg(not(target_feature = "crt-static")))]
+        extern "C" {}
+    }
+}
+// Android's unwinding library depends on dl_iterate_phdr in `libdl`.
+#[cfg(target_os = "android")]
+#[link(name = "dl", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
+#[link(name = "dl", cfg(not(target_feature = "crt-static")))]
+extern "C" {}
+
 // When building with crt-static, we get `gcc_eh` from the `libc` crate, since
 // glibc needs it, and needs it listed later on the linker command line. We
 // don't want to duplicate it here.