Some changes to prepare for FreeBSD CI

ci/x86_64-freebsd-debug.sh

@@ -0,0 +1,71 @@
+#!/bin/sh
+
+# Requires cmake ninja-build
+
+set -x
+set -e
+
+ARCH="x86_64"
+TARGET="$ARCH-freebsd-none"
+MCPU="baseline"
+CACHE_BASENAME="zig+llvm+lld+clang-$TARGET-0.16.0-dev.312+164c598cd"
+PREFIX="$HOME/deps/$CACHE_BASENAME"
+ZIG="$PREFIX/bin/zig"
+
+# Make the `zig version` number consistent.
+# This will affect the cmake command below.
+git fetch --unshallow || true
+git fetch --tags
+
+# Override the cache directories because they won't actually help other CI runs
+# which will be testing alternate versions of zig, and ultimately would just
+# fill up space on the hard drive for no reason.
+export ZIG_GLOBAL_CACHE_DIR="$PWD/zig-global-cache"
+export ZIG_LOCAL_CACHE_DIR="$PWD/zig-local-cache"
+
+mkdir build-debug
+cd build-debug
+
+export CC="$ZIG cc -target $TARGET -mcpu=$MCPU"
+export CXX="$ZIG c++ -target $TARGET -mcpu=$MCPU"
+
+cmake .. \
+  -DCMAKE_INSTALL_PREFIX="stage3-debug" \
+  -DCMAKE_PREFIX_PATH="$PREFIX" \
+  -DCMAKE_BUILD_TYPE=Debug \
+  -DZIG_TARGET_TRIPLE="$TARGET" \
+  -DZIG_TARGET_MCPU="$MCPU" \
+  -DZIG_STATIC=ON \
+  -DZIG_NO_LIB=ON \
+  -GNinja \
+  -DCMAKE_C_LINKER_DEPFILE_SUPPORTED=FALSE \
+  -DCMAKE_CXX_LINKER_DEPFILE_SUPPORTED=FALSE
+# https://github.com/ziglang/zig/issues/22213
+
+# Now cmake will use zig as the C/C++ compiler. We reset the environment variables
+# so that installation and testing do not get affected by them.
+unset CC
+unset CXX
+
+ninja install
+
+stage3-debug/bin/zig build test docs \
+  --maxrss 32212254720 \
+  -Dstatic-llvm \
+  -Dskip-linux \
+  -Dskip-netbsd \
+  -Dskip-windows \
+  -Dskip-macos \
+  -Dtarget=native-native-none \
+  --search-prefix "$PREFIX" \
+  --zig-lib-dir "$PWD/../lib"
+
+stage3-debug/bin/zig build \
+  --prefix stage4-debug \
+  -Denable-llvm \
+  -Dno-lib \
+  -Dtarget=$TARGET \
+  -Duse-zig-libcxx \
+  -Dversion-string="$(stage3-debug/bin/zig version)"
+
+stage4-debug/bin/zig test ../test/behavior.zig

ci/x86_64-freebsd-release.sh

@@ -0,0 +1,77 @@
+#!/bin/sh
+
+# Requires cmake ninja-build
+
+set -x
+set -e
+
+ARCH="x86_64"
+TARGET="$ARCH-freebsd-none"
+MCPU="baseline"
+CACHE_BASENAME="zig+llvm+lld+clang-$TARGET-0.16.0-dev.312+164c598cd"
+PREFIX="$HOME/deps/$CACHE_BASENAME"
+ZIG="$PREFIX/bin/zig"
+
+# Make the `zig version` number consistent.
+# This will affect the cmake command below.
+git fetch --unshallow || true
+git fetch --tags
+
+# Override the cache directories because they won't actually help other CI runs
+# which will be testing alternate versions of zig, and ultimately would just
+# fill up space on the hard drive for no reason.
+export ZIG_GLOBAL_CACHE_DIR="$PWD/zig-global-cache"
+export ZIG_LOCAL_CACHE_DIR="$PWD/zig-local-cache"
+
+mkdir build-release
+cd build-release
+
+export CC="$ZIG cc -target $TARGET -mcpu=$MCPU"
+export CXX="$ZIG c++ -target $TARGET -mcpu=$MCPU"
+
+cmake .. \
+  -DCMAKE_INSTALL_PREFIX="stage3-release" \
+  -DCMAKE_PREFIX_PATH="$PREFIX" \
+  -DCMAKE_BUILD_TYPE=Release \
+  -DZIG_TARGET_TRIPLE="$TARGET" \
+  -DZIG_TARGET_MCPU="$MCPU" \
+  -DZIG_STATIC=ON \
+  -DZIG_NO_LIB=ON \
+  -GNinja \
+  -DCMAKE_C_LINKER_DEPFILE_SUPPORTED=FALSE \
+  -DCMAKE_CXX_LINKER_DEPFILE_SUPPORTED=FALSE
+# https://github.com/ziglang/zig/issues/22213
+
+# Now cmake will use zig as the C/C++ compiler. We reset the environment variables
+# so that installation and testing do not get affected by them.
+unset CC
+unset CXX
+
+ninja install
+
+stage3-release/bin/zig build test docs \
+  --maxrss 32212254720 \
+  -Dstatic-llvm \
+  -Dskip-linux \
+  -Dskip-netbsd \
+  -Dskip-windows \
+  -Dskip-macos \
+  -Dtarget=native-native-none \
+  --search-prefix "$PREFIX" \
+  --zig-lib-dir "$PWD/../lib"
+
+# Ensure that stage3 and stage4 are byte-for-byte identical.
+stage3-release/bin/zig build \
+  --prefix stage4-release \
+  -Denable-llvm \
+  -Dno-lib \
+  -Doptimize=ReleaseFast \
+  -Dstrip \
+  -Dtarget=$TARGET \
+  -Duse-zig-libcxx \
+  -Dversion-string="$(stage3-release/bin/zig version)"
+
+# diff returns an error code if the files differ.
+echo "If the following command fails, it means nondeterminism has been"
+echo "introduced, making stage3 and stage4 no longer byte-for-byte identical."
+diff stage3-release/bin/zig stage4-release/bin/zig

ci/x86_64-linux-release.sh

@@ -65,6 +65,7 @@ stage3-release/bin/zig build test docs \
   -fqemu \
   -fwasmtime \
   -Dstatic-llvm \
+  -Dskip-freebsd \
   -Dtarget=native-native-musl \
   --search-prefix "$PREFIX" \
   --zig-lib-dir "$PWD/../lib" \

lib/std/posix/test.zig

@@ -644,7 +644,6 @@ test "sigrtmin/max" {
     try std.testing.expect(posix.sigrtmin() >= 32);
     try std.testing.expect(posix.sigrtmin() >= posix.system.sigrtmin());
     try std.testing.expect(posix.sigrtmin() < posix.system.sigrtmax());
-    try std.testing.expect(posix.sigrtmax() < posix.NSIG);
 }
 
 test "sigset empty/full" {

src/target.zig

@@ -238,7 +238,7 @@ pub fn hasLldSupport(ofmt: std.Target.ObjectFormat) bool {
 pub fn selfHostedBackendIsAsRobustAsLlvm(target: *const std.Target) bool {
     if (target.cpu.arch.isSpirV()) return true;
     if (target.cpu.arch == .x86_64 and target.ptrBitWidth() == 64) {
-        if (target.os.tag == .netbsd or target.os.tag == .openbsd) {
+        if (target.os.tag.isBSD()) {
             // Self-hosted linker needs work: https://github.com/ziglang/zig/issues/24341
             return false;
         }

test/link/elf.zig

@@ -2,6 +2,9 @@ pub fn testAll(b: *Build, build_opts: BuildOptions) *Step {
     _ = build_opts;
     const elf_step = b.step("test-elf", "Run ELF tests");
 
+    // https://github.com/ziglang/zig/issues/25323
+    if (builtin.os.tag == .freebsd) return elf_step;
+
     const default_target = b.resolveTargetQuery(.{
         .cpu_arch = .x86_64, // TODO relax this once ELF linker is able to handle other archs
         .os_tag = .linux,
@@ -4285,6 +4288,7 @@ const addStaticLibrary = link.addStaticLibrary;
 const expectLinkErrors = link.expectLinkErrors;
 const link = @import("link.zig");
 const std = @import("std");
+const builtin = @import("builtin");
 
 const Build = std.Build;
 const BuildOptions = link.BuildOptions;

test/src/StackTrace.zig

@@ -45,7 +45,7 @@ fn addCaseInner(self: *StackTrace, config: Config, use_llvm: bool) void {
 fn shouldTestNonLlvm(target: *const std.Target) bool {
     return switch (target.cpu.arch) {
         .x86_64 => switch (target.ofmt) {
-            .elf => true,
+            .elf => !target.os.tag.isBSD(),
             else => false,
         },
         else => false,

test/stack_traces.zig

@@ -803,6 +803,7 @@ pub fn addCases(cases: *tests.StackTracesContext) void {
                 .s390x,
             },
             .exclude_os = &.{
+                .freebsd,
                 .openbsd, // integer overflow
                 .windows, // TODO intermittent failures
             },
@@ -847,6 +848,7 @@ pub fn addCases(cases: *tests.StackTracesContext) void {
         },
         .ReleaseSafe = .{
             .exclude_os = &.{
+                .freebsd,
                 .windows, // TODO
                 .linux, // defeated by aggressive inlining
                 .macos, // Broken in LLVM 20.

test/standalone/stack_iterator/build.zig

@@ -61,8 +61,12 @@ pub fn build(b: *std.Build) void {
             .use_llvm = true,
         });
 
-        const run_cmd = b.addRunArtifact(exe);
-        test_step.dependOn(&run_cmd.step);
+        if (builtin.os.tag != .freebsd) {
+            const run_cmd = b.addRunArtifact(exe);
+            test_step.dependOn(&run_cmd.step);
+        } else {
+            test_step.dependOn(&exe.step);
+        }
     }
 
     // https://github.com/ziglang/zig/issues/24522

test/tests.zig

@@ -2451,8 +2451,9 @@ pub fn wouldUseLlvm(use_llvm: ?bool, query: std.Target.Query, optimize_mode: Opt
         else => return true,
     }
     const cpu_arch = query.cpu_arch orelse builtin.cpu.arch;
+    const os_tag = query.os_tag orelse builtin.os.tag;
     switch (cpu_arch) {
-        .x86_64 => if (std.Target.ptrBitWidth_arch_abi(cpu_arch, query.abi orelse .none) != 64) return true,
+        .x86_64 => if (os_tag.isBSD() or std.Target.ptrBitWidth_arch_abi(cpu_arch, query.abi orelse .none) != 64) return true,
         .spirv32, .spirv64 => return false,
         else => return true,
     }