Merge pull request #21310 from alexrp/ppc64-tests

Force ELFv2 for PPC64 and add `powerpc64-linux-(none,musl)` to CI

src/target.zig

@@ -381,6 +381,14 @@ pub fn addrSpaceCastIsValid(
 }
 
 pub fn llvmMachineAbi(target: std.Target) ?[:0]const u8 {
+    // LLD does not support ELFv1. Rather than having LLVM produce ELFv1 code and then linking it
+    // into a broken ELFv2 binary, just force LLVM to use ELFv2 as well. This will break when glibc
+    // is linked as glibc only supports ELFv2 for little endian, but there's nothing we can do about
+    // that. With this hack, `powerpc64-linux-none` will at least work.
+    //
+    // Once our self-hosted linker can handle both ABIs, this hack should go away.
+    if (target.cpu.arch == .powerpc64) return "elfv2";
+
     const have_float = switch (target.abi) {
         .gnueabihf, .musleabihf, .eabihf => true,
         else => false,
@@ -409,7 +417,6 @@ pub fn llvmMachineAbi(target: std.Target) ?[:0]const u8 {
                 return "ilp32";
             }
         },
-        //TODO add ARM, Mips, and PowerPC
         else => return null,
     }
 }

test/behavior/union.zig

@@ -1891,7 +1891,7 @@ test "reinterpret packed union" {
     try comptime S.doTheTest();
 
     if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
-    if (builtin.cpu.arch.isPowerPC32()) return error.SkipZigTest; // TODO
+    if (builtin.cpu.arch.isPowerPC()) return error.SkipZigTest; // https://github.com/ziglang/zig/issues/21050
     if (builtin.cpu.arch.isMIPS()) return error.SkipZigTest; // https://github.com/ziglang/zig/issues/21050
     if (builtin.cpu.arch.isWasm()) return error.SkipZigTest; // TODO
     try S.doTheTest();

test/behavior/vector.zig

@@ -1450,6 +1450,7 @@ test "store vector with memset" {
             .mips64el,
             .riscv64,
             .powerpc,
+            .powerpc64,
             => {
                 // LLVM 16 ERROR: "Converting bits to bytes lost precision"
                 // https://github.com/ziglang/zig/issues/16177

test/tests.zig

@@ -438,6 +438,30 @@ const test_targets = blk: {
         //    .link_libc = true,
         //},
 
+        .{
+            .target = .{
+                .cpu_arch = .powerpc64,
+                .os_tag = .linux,
+                .abi = .none,
+            },
+        },
+        .{
+            .target = .{
+                .cpu_arch = .powerpc64,
+                .os_tag = .linux,
+                .abi = .musl,
+            },
+            .link_libc = true,
+        },
+        // Requires ELFv1 linker support.
+        // .{
+        //     .target = .{
+        //         .cpu_arch = .powerpc64,
+        //         .os_tag = .linux,
+        //         .abi = .gnu,
+        //     },
+        //     .link_libc = true,
+        // },
         .{
             .target = .{
                 .cpu_arch = .powerpc64le,