add i686-unknown-linux-dynmusl target for void linux

Author: kaniini

compiler/rustc_target/src/spec/i586_unknown_linux_dynmusl.rs

@@ -1,9 +1,8 @@
 use crate::spec::Target;
 
 pub fn target() -> Target {
-    let mut base = super::i686_unknown_linux_musl::target();
+    let mut base = super::i586_unknown_linux_musl::target();
 
-    base.options.cpu = "pentium4".to_string();
     base.llvm_target = "i586-unknown-linux-musl".to_string();
     base.options.crt_static_default = false;
     base.options.static_position_independent_executables = true;

compiler/rustc_target/src/spec/i686_unknown_linux_dynmusl.rs

@@ -0,0 +1,11 @@
+use crate::spec::Target;
+
+pub fn target() -> Target {
+    let mut base = super::i686_unknown_linux_musl::target();
+
+    base.llvm_target = "i686-unknown-linux-musl".to_string();
+    base.options.crt_static_default = false;
+    base.options.static_position_independent_executables = true;
+
+    base
+}

compiler/rustc_target/src/spec/mod.rs

@@ -672,6 +672,7 @@ supported_targets! {
     ("x86_64-unknown-linux-musl", x86_64_unknown_linux_musl),
     ("x86_64-unknown-linux-dynmusl", x86_64_unknown_linux_dynmusl),
     ("i686-unknown-linux-musl", i686_unknown_linux_musl),
+    ("i686-unknown-linux-dynmusl", i686_unknown_linux_dynmusl),
     ("i586-unknown-linux-musl", i586_unknown_linux_musl),
     ("i586-unknown-linux-dynmusl", i586_unknown_linux_dynmusl),
     ("mips-unknown-linux-musl", mips_unknown_linux_musl),

src/doc/rustc/src/platform-support.md

@@ -186,6 +186,7 @@ target | std | host | notes
 `i686-pc-windows-msvc` | ✓ |  | 32-bit Windows XP support
 `i686-unknown-uefi` | ? |  | 32-bit UEFI
 `i686-unknown-haiku` | ✓ | ✓ | 32-bit Haiku
+`i686-unknown-linux-dynmusl` |   |   | 32-bit Pentium 4-class x86 Linux (Musl with dynamic linking)
 `i686-unknown-netbsd` | ✓ | ✓ | NetBSD/i386 with SSE2
 `i686-unknown-openbsd` | ✓ | ✓ | 32-bit OpenBSD
 `i686-uwp-windows-gnu` | ? |  |