update zig sources to 0.15.0-dev.622+55848363f

Author: alexrp

README.md

@@ -11,7 +11,7 @@ to find and inspect the patch diffs.
  * LLVM, LLD, Clang 20.1.2
  * zlib 1.3.1
  * zstd 1.5.2
- * zig 0.15.0-dev.317+fa5915389
+ * zig 0.15.0-dev.622+55848363f
 
 For other versions, check the git tags of this repository.
 

build

@@ -7,7 +7,7 @@ TARGET="$1" # Example: riscv64-linux-gnu
 MCPU="$2" # Examples: `baseline`, `native`, `generic+v7a`, or `arm1176jzf_s`
 
 ROOTDIR="$(pwd)"
-ZIG_VERSION="0.15.0-dev.317+fa5915389"
+ZIG_VERSION="0.15.0-dev.622+55848363f"
 
 TARGET_OS_AND_ABI=${TARGET#*-} # Example: linux-gnu
 

build.bat

@@ -36,7 +36,7 @@ if "%VSCMD_ARG_HOST_ARCH%"=="x86" set OUTDIR=out-win-x86
 
 set ROOTDIR=%~dp0
 set "ROOTDIR_CMAKE=%ROOTDIR:\=/%"
-set ZIG_VERSION="0.15.0-dev.317+fa5915389"
+set ZIG_VERSION="0.15.0-dev.622+55848363f"
 set JOBS_ARG=
 
 pushd %ROOTDIR%

zig/CMakeLists.txt

@@ -90,6 +90,7 @@ set(ZIG_STATIC_LLVM ${ZIG_STATIC} CACHE BOOL "Prefer linking against static LLVM
 set(ZIG_STATIC_ZLIB ${ZIG_STATIC} CACHE BOOL "Prefer linking against static zlib")
 set(ZIG_STATIC_ZSTD ${ZIG_STATIC} CACHE BOOL "Prefer linking against static zstd")
 set(ZIG_STATIC_CURSES OFF CACHE BOOL "Enable static linking against curses")
+set(ZIG_STATIC_LIBXML2 OFF CACHE BOOL "Enable static linking against libxml2")
 
 if (ZIG_SHARED_LLVM AND ZIG_STATIC_LLVM)
     message(SEND_ERROR "-DZIG_SHARED_LLVM and -DZIG_STATIC_LLVM cannot both be enabled simultaneously")
@@ -167,6 +168,12 @@ if(ZIG_STATIC_CURSES)
     list(APPEND LLVM_LIBRARIES "${CURSES}")
 endif()
 
+if(ZIG_STATIC_LIBXML2)
+    list(REMOVE_ITEM LLVM_LIBRARIES "-lxml2")
+    find_library(LIBXML2 NAMES libxml2.a NAMES_PER_DIR)
+    list(APPEND LLVM_LIBRARIES "${LIBXML2}")
+endif()
+
 find_package(Threads)
 
 set(ZIG_CONFIG_H_OUT "${PROJECT_BINARY_DIR}/config.h")
@@ -536,6 +543,7 @@ set(ZIG_STAGE2_SOURCES
     src/arch/arm/Mir.zig
     src/arch/arm/abi.zig
     src/arch/arm/bits.zig
+    src/arch/powerpc/CodeGen.zig
     src/arch/riscv64/abi.zig
     src/arch/riscv64/bits.zig
     src/arch/riscv64/CodeGen.zig
@@ -579,11 +587,13 @@ set(ZIG_STAGE2_SOURCES
     src/codegen/spirv/spec.zig
     src/crash_report.zig
     src/dev.zig
-    src/glibc.zig
+    src/libs/freebsd.zig
+    src/libs/glibc.zig
+    src/libs/netbsd.zig
     src/introspect.zig
-    src/libcxx.zig
-    src/libtsan.zig
-    src/libunwind.zig
+    src/libs/libcxx.zig
+    src/libs/libtsan.zig
+    src/libs/libunwind.zig
     src/link.zig
     src/link/C.zig
     src/link/Coff.zig
@@ -605,6 +615,7 @@ set(ZIG_STAGE2_SOURCES
     src/link/Elf/relocatable.zig
     src/link/Elf/relocation.zig
     src/link/Elf/synthetic_sections.zig
+    src/link/Goff.zig
     src/link/LdScript.zig
     src/link/MachO.zig
     src/link/MachO/Archive.zig
@@ -632,7 +643,6 @@ set(ZIG_STAGE2_SOURCES
     src/link/MachO/synthetic.zig
     src/link/MachO/Thunk.zig
     src/link/MachO/uuid.zig
-    src/link/NvPtx.zig
     src/link/Plan9.zig
     src/link/Plan9/aout.zig
     src/link/SpirV.zig
@@ -645,6 +655,7 @@ set(ZIG_STAGE2_SOURCES
     src/link/Wasm/Archive.zig
     src/link/Wasm/Flush.zig
     src/link/Wasm/Object.zig
+    src/link/Xcoff.zig
     src/link/aarch64.zig
     src/link/riscv.zig
     src/link/table_section.zig
@@ -655,8 +666,8 @@ set(ZIG_STAGE2_SOURCES
     src/link/tapi/yaml.zig
     src/link/tapi/yaml/test.zig
     src/main.zig
-    src/mingw.zig
-    src/musl.zig
+    src/libs/mingw.zig
+    src/libs/musl.zig
     src/mutable_value.zig
     src/print_air.zig
     src/print_env.zig
@@ -667,7 +678,7 @@ set(ZIG_STAGE2_SOURCES
     src/target.zig
     src/tracy.zig
     src/translate_c.zig
-    src/wasi_libc.zig
+    src/libs/wasi_libc.zig
 )
 
 if(MSVC)
@@ -944,12 +955,24 @@ if(ZIG_EXTRA_BUILD_ARGS)
   list(APPEND ZIG_BUILD_ARGS ${ZIG_EXTRA_BUILD_ARGS})
 endif()
 
+set(ZIG_RELEASE_SAFE OFF CACHE BOOL "Build Zig as ReleaseSafe (with debug assertions on)")
+
 if("${CMAKE_BUILD_TYPE}" STREQUAL "Debug")
   list(APPEND ZIG_BUILD_ARGS -Doptimize=Debug)
-elseif("${CMAKE_BUILD_TYPE}" STREQUAL "RelWithDebInfo")
-  list(APPEND ZIG_BUILD_ARGS -Doptimize=ReleaseFast)
 else()
-  list(APPEND ZIG_BUILD_ARGS -Doptimize=ReleaseFast -Dstrip)
+  if("${CMAKE_BUILD_TYPE}" STREQUAL "MinSizeRel")
+    list(APPEND ZIG_BUILD_ARGS -Doptimize=ReleaseSmall)
+  else()
+    # Release and RelWithDebInfo
+    if(ZIG_RELEASE_SAFE)
+      list(APPEND ZIG_BUILD_ARGS -Doptimize=ReleaseSafe)
+    else()
+      list(APPEND ZIG_BUILD_ARGS -Doptimize=ReleaseFast)
+    endif()
+    if(NOT "${CMAKE_BUILD_TYPE}" STREQUAL "RelWithDebInfo")
+      list(APPEND ZIG_BUILD_ARGS -Dstrip)
+    endif()
+  endif()
 endif()
 
 if(ZIG_STATIC AND NOT MSVC)

zig/README.md

@@ -47,7 +47,7 @@ Ensure you have the required dependencies:
 
  * CMake >= 3.15
  * System C/C++ Toolchain
- * LLVM, Clang, LLD development libraries == 19.x
+ * LLVM, Clang, LLD development libraries == 20.x
 
 Then it is the standard CMake build process:
 

zig/bootstrap.c

@@ -123,7 +123,7 @@ int main(int argc, char **argv) {
         if (f == NULL)
             panic("unable to open config.zig for writing");
 
-        const char *zig_version = "0.15.0-dev.317+fa5915389";
+        const char *zig_version = "0.15.0-dev.622+55848363f";
 
         int written = fprintf(f,
             "pub const have_llvm = false;\n"

zig/build.zig

@@ -197,12 +197,6 @@ pub fn build(b: *std.Build) !void {
     exe.pie = pie;
     exe.entitlements = entitlements;
 
-    exe.build_id = b.option(
-        std.zig.BuildId,
-        "build-id",
-        "Request creation of '.note.gnu.build-id' section",
-    );
-
     if (no_bin) {
         b.getInstallStep().dependOn(&exe.step);
     } else {
@@ -443,7 +437,8 @@ pub fn build(b: *std.Build) !void {
         .skip_non_native = skip_non_native,
         .skip_libc = skip_libc,
         .use_llvm = use_llvm,
-        .max_rss = 2 * 1024 * 1024 * 1024,
+        // 2262585344 was observed on an x86_64-linux-gnu host.
+        .max_rss = 2488843878,
     }));
 
     test_modules_step.dependOn(tests.addModuleTests(b, .{
@@ -482,8 +477,8 @@ pub fn build(b: *std.Build) !void {
         .test_target_filters = test_target_filters,
         .test_extra_targets = test_extra_targets,
         .root_src = "lib/c.zig",
-        .name = "universal-libc",
-        .desc = "Run the universal libc tests",
+        .name = "zigc",
+        .desc = "Run the zigc tests",
         .optimize_modes = optimization_modes,
         .include_paths = &.{},
         .skip_single_threaded = true,
@@ -514,18 +509,19 @@ pub fn build(b: *std.Build) !void {
     test_step.dependOn(unit_tests_step);
 
     const unit_tests = b.addTest(.{
-        .root_module = b.createModule(.{
-            .root_source_file = b.path("src/main.zig"),
+        .root_module = addCompilerMod(b, .{
             .optimize = optimize,
             .target = target,
-            .link_libc = link_libc,
             .single_threaded = single_threaded,
         }),
         .filters = test_filters,
         .use_llvm = use_llvm,
         .use_lld = use_llvm,
         .zig_lib_dir = b.path("lib"),
     });
+    if (link_libc) {
+        unit_tests.root_module.link_libc = true;
+    }
     unit_tests.root_module.addOptions("build_options", exe_options);
     unit_tests_step.dependOn(&b.addRunArtifact(unit_tests).step);
 
@@ -556,6 +552,11 @@ pub fn build(b: *std.Build) !void {
         .skip_non_native = skip_non_native,
         .skip_libc = skip_libc,
     })) |test_debugger_step| test_step.dependOn(test_debugger_step);
+    if (tests.addLlvmIrTests(b, .{
+        .enable_llvm = enable_llvm,
+        .test_filters = test_filters,
+        .test_target_filters = test_target_filters,
+    })) |test_llvm_ir_step| test_step.dependOn(test_llvm_ir_step);
 
     try addWasiUpdateStep(b, version);
 
@@ -651,7 +652,7 @@ fn addWasiUpdateStep(b: *std.Build, version: [:0]const u8) !void {
     update_zig1_step.dependOn(&copy_zig_h.step);
 }
 
-const AddCompilerStepOptions = struct {
+const AddCompilerModOptions = struct {
     optimize: std.builtin.OptimizeMode,
     target: std.Build.ResolvedTarget,
     strip: ?bool = null,
@@ -660,7 +661,7 @@ const AddCompilerStepOptions = struct {
     single_threaded: ?bool = null,
 };
 
-fn addCompilerStep(b: *std.Build, options: AddCompilerStepOptions) *std.Build.Step.Compile {
+fn addCompilerMod(b: *std.Build, options: AddCompilerModOptions) *std.Build.Module {
     const compiler_mod = b.createModule(.{
         .root_source_file = b.path("src/main.zig"),
         .target = options.target,
@@ -683,10 +684,14 @@ fn addCompilerStep(b: *std.Build, options: AddCompilerStepOptions) *std.Build.St
     compiler_mod.addImport("aro", aro_mod);
     compiler_mod.addImport("aro_translate_c", aro_translate_c_mod);
 
+    return compiler_mod;
+}
+
+fn addCompilerStep(b: *std.Build, options: AddCompilerModOptions) *std.Build.Step.Compile {
     const exe = b.addExecutable(.{
         .name = "zig",
         .max_rss = 7_800_000_000,
-        .root_module = compiler_mod,
+        .root_module = addCompilerMod(b, options),
     });
     exe.stack_size = stack_size;
 

zig/doc/langref.html.in

@@ -1649,6 +1649,7 @@ unwrapped == 1234{#endsyntax#}</pre>
               <li>{#link|Floats#}</li>
               <li>{#link|bool|Primitive Types#}</li>
               <li>{#link|type|Primitive Types#}</li>
+              <li>{#link|packed struct#}</li>
             </ul>
           </td>
           <td>
@@ -2224,31 +2225,36 @@ or
 
       {#header_open|packed struct#}
       <p>
-      Unlike normal structs, {#syntax#}packed{#endsyntax#} structs have guaranteed in-memory layout:
+      {#syntax#}packed{#endsyntax#} structs, like {#syntax#}enum{#endsyntax#}, are based on the concept
+      of interpreting integers differently. All packed structs have a <strong>backing integer</strong>,
+      which is implicitly determined by the total bit count of fields, or explicitly specified.
+      Packed structs have well-defined memory layout - exactly the same ABI as their backing integer.
+      </p>
+      <p>
+      Each field of a packed struct is interpreted as a logical sequence of bits, arranged from
+      least to most significant. Allowed field types:
       </p>
       <ul>
-        <li>Fields remain in the order declared, least to most significant.</li>
-        <li>There is no padding between fields.</li>
-        <li>Zig supports arbitrary width {#link|Integers#} and although normally, integers with fewer
-        than 8 bits will still use 1 byte of memory, in packed structs, they use
-        exactly their bit width.
-        </li>
-        <li>{#syntax#}bool{#endsyntax#} fields use exactly 1 bit.</li>
+        <li>An {#link|integer|Integers#} field uses exactly as many bits as its
+        bit width. For example, a {#syntax#}u5{#endsyntax#} will use 5 bits of
+        the backing integer.</li>
+        <li>A {#link|bool|Primitive Types#} field uses exactly 1 bit.</li>
         <li>An {#link|enum#} field uses exactly the bit width of its integer tag type.</li>
         <li>A {#link|packed union#} field uses exactly the bit width of the union field with
         the largest bit width.</li>
-        <li>Packed structs support equality operators.</li>
+        <li>A {#syntax#}packed struct{#endsyntax#} field uses the bits of its backing integer.</li>
       </ul>
       <p>
       This means that a {#syntax#}packed struct{#endsyntax#} can participate
       in a {#link|@bitCast#} or a {#link|@ptrCast#} to reinterpret memory.
       This even works at {#link|comptime#}:
       </p>
       {#code|test_packed_structs.zig#}
-
       <p>
-      The backing integer is inferred from the fields' total bit width.
-      Optionally, it can be explicitly provided and enforced at compile time:
+      The backing integer can be inferred or explicitly provided. When
+      inferred, it will be unsigned. When explicitly provided, its bit width
+      will be enforced at compile time to exactly match the total bit width of
+      the fields:
       </p>
       {#code|test_missized_packed_struct.zig#}
 
@@ -2290,18 +2296,18 @@ or
 
       <p>
       Equating packed structs results in a comparison of the backing integer, 
-      and only works for the `==` and `!=` operators.
+      and only works for the {#syntax#}=={#endsyntax#} and {#syntax#}!={#endsyntax#} {#link|Operators#}.
       </p>
       {#code|test_packed_struct_equality.zig#}
 
       <p>
-      Using packed structs with {#link|volatile#} is problematic, and may be a compile error in the future.
-      For details on this subscribe to
-      <a href="https://github.com/ziglang/zig/issues/1761">this issue</a>.
-      TODO update these docs with a recommendation on how to use packed structs with MMIO
-      (the use case for volatile packed structs) once this issue is resolved.
-      Don't worry, there will be a good solution for this use case in zig.
+      Field access and assignment can be understood as shorthand for bitshifts
+      on the backing integer. These operations are not {#link|atomic|Atomics#},
+      so beware using field access syntax when combined with memory-mapped
+      input-output (MMIO). Instead of field access on {#link|volatile#} {#link|Pointers#},
+      construct a fully-formed new value first, then write that value to the volatile pointer.
       </p>
+      {#code|packed_struct_mmio.zig#}
       {#header_close#}
 
       {#header_open|Struct Naming#}
@@ -5143,6 +5149,23 @@ fn cmpxchgWeakButNotAtomic(comptime T: type, ptr: *T, expected_value: T, new_val
       {#syntax#}std.crypto.secureZero{#endsyntax#}</p>
       {#header_close#}
 
+      {#header_open|@memmove#}
+      <pre>{#syntax#}@memmove(dest, source) void{#endsyntax#}</pre>
+      <p>This function copies bytes from one region of memory to another, but unlike
+      {#link|@memcpy#} the regions may overlap.</p>
+      <p>{#syntax#}dest{#endsyntax#} must be a mutable slice, a mutable pointer to an array, or
+        a mutable many-item {#link|pointer|Pointers#}. It may have any
+        alignment, and it may have any element type.</p>
+      <p>{#syntax#}source{#endsyntax#} must be a slice, a pointer to
+        an array, or a many-item {#link|pointer|Pointers#}. It may
+        have any alignment, and it may have any element type.</p>
+      <p>The {#syntax#}source{#endsyntax#} element type must have the same in-memory
+        representation as the {#syntax#}dest{#endsyntax#} element type.</p>
+      <p>Similar to {#link|for#} loops, at least one of {#syntax#}source{#endsyntax#} and
+        {#syntax#}dest{#endsyntax#} must provide a length, and if two lengths are provided,
+        they must be equal.</p>
+      {#header_close#}
+
       {#header_open|@min#}
       <pre>{#syntax#}@min(...) T{#endsyntax#}</pre>
       <p>

zig/doc/langref/packed_struct_mmio.zig

@@ -0,0 +1,19 @@
+pub const GpioRegister = packed struct(u8) {
+    GPIO0: bool,
+    GPIO1: bool,
+    GPIO2: bool,
+    GPIO3: bool,
+    reserved: u4 = 0,
+};
+
+const gpio: *volatile GpioRegister = @ptrFromInt(0x0123);
+
+pub fn writeToGpio(new_states: GpioRegister) void {
+    // Example of what not to do:
+    // BAD! gpio.GPIO0 = true; BAD!
+
+    // Instead, do this:
+    gpio.* = new_states;
+}
+
+// syntax