lang/rust: fix build on armv7 the same way as for powerpc

lang/rust/Makefile

@@ -111,12 +111,15 @@ IGNORE=		is only for FreeBSD
 .if ${ARCH} == powerpc
 # bfd to link rustc_driver; lld currently can't
 BUILD_DEPENDS+=	ld.bfd:devel/binutils
-LIB_DEPENDS+=	libatomic.so:lang/gcc${GCC_DEFAULT}
-MAKE_ENV+=	RUSTFLAGS="-L/usr/local/lib/gcc${GCC_DEFAULT}"
 .else
 MAKE_ENV+=	RUST_BACKTRACE=1
 .endif
 
+.if ${ARCH} == armv7 || ${ARCH} == powerpc
+LIB_DEPENDS+=	libatomic.so:lang/gcc${GCC_DEFAULT}
+MAKE_ENV+=	RUSTFLAGS="-L/usr/local/lib/gcc${GCC_DEFAULT}"
+.endif
+
 # rls doesn't build on rust nightly
 # rls needs 64-bit atomics: it doesn't build on powerpc
 .if !defined(NIGHTLY_DATE) && ${ARCH} != powerpc

lang/rust/files/patch-compiler_rustc__llvm_build.rs

+From cbeec86a5594ef6ca36d0ea24b4cb7e3dbaded87 Mon Sep 17 00:00:00 2001
+From: pkubaj <pkubaj@FreeBSD.org>
+Date: Fri, 18 Nov 2022 12:36:49 +0000
+Subject: [PATCH] Fix build on powerpc-unknown-freebsd
+
+Probably also fixes build on arm and mips*. Related to https://github.com/rust-lang/rust/issues/104220
+---
+ compiler/rustc_llvm/build.rs | 15 +++++++++------
+ 1 file changed, 9 insertions(+), 6 deletions(-)
+
+diff --git a/compiler/rustc_llvm/build.rs b/compiler/rustc_llvm/build.rs
+index d35e4191cc0b1..afdf9ac8883e9 100644
+--- compiler/rustc_llvm/build.rs
++++ compiler/rustc_llvm/build.rs
+@@ -237,18 +237,21 @@ fn main() {
+ 
+     if !is_crossed {
+         cmd.arg("--system-libs");
+-    } else if target.contains("windows-gnu") {
+-        println!("cargo:rustc-link-lib=shell32");
+-        println!("cargo:rustc-link-lib=uuid");
+-    } else if target.contains("netbsd") || target.contains("haiku") || target.contains("darwin") {
+-        println!("cargo:rustc-link-lib=z");
+-    } else if target.starts_with("arm")
++    }
++
++    if target.starts_with("arm")
+         || target.starts_with("mips-")
+         || target.starts_with("mipsel-")
+         || target.starts_with("powerpc-")
+     {
+         // 32-bit targets need to link libatomic.
+         println!("cargo:rustc-link-lib=atomic");
++        println!("cargo:rustc-link-lib=z");
++    } else if target.contains("windows-gnu") {
++        println!("cargo:rustc-link-lib=shell32");
++        println!("cargo:rustc-link-lib=uuid");
++    } else if target.contains("netbsd") || target.contains("haiku") || target.contains("darwin") {
++        println!("cargo:rustc-link-lib=z");
+     }
+     cmd.args(&components);
+ 

lang/rust/files/powerpc/patch-compiler_rustc__llvm_build.rs

---- compiler/rustc_llvm/build.rs.orig	2022-11-15 08:26:08.366900000 +0100
-+++ compiler/rustc_llvm/build.rs	2022-11-15 08:29:07.101616000 +0100
-@@ -235,20 +235,18 @@ fn main() {
-     let mut cmd = Command::new(&llvm_config);
-     cmd.arg(llvm_link_arg).arg("--libs");
- 
--    if !is_crossed {
-+    if target.starts_with("arm")
-+        || target.starts_with("powerpc-")
-+    {
-+        println!("cargo:rustc-link-lib=atomic");
-+        println!("cargo:rustc-link-lib=z");
-+    } else if !is_crossed {
-         cmd.arg("--system-libs");
-     } else if target.contains("windows-gnu") {
-         println!("cargo:rustc-link-lib=shell32");
-         println!("cargo:rustc-link-lib=uuid");
-     } else if target.contains("netbsd") || target.contains("haiku") || target.contains("darwin") {
-         println!("cargo:rustc-link-lib=z");
--    } else if target.starts_with("arm")
--        || target.starts_with("mips-")
--        || target.starts_with("mipsel-")
--        || target.starts_with("powerpc-")
--    {
--        // 32-bit targets need to link libatomic.
--        println!("cargo:rustc-link-lib=atomic");
-     }
-     cmd.args(&components);
-