remove glibc hacks and update Zig SDK

toolchain/BUILD.sdk.bazel

@@ -12,13 +12,6 @@ declare_files(
     os = {os},
 )
 
-exports_files([
-    "glibc-hacks/fcntl.map",
-    "glibc-hacks/fcntl.h",
-    "glibc-hacks/res_search.map",
-    "glibc-hacks/res_search.h",
-])
-
 declare_cc_toolchains(
     os = {os},
     zig_sdk_path = {zig_sdk_path},

toolchain/defs.bzl

@@ -20,14 +20,14 @@ URL_FORMAT_NIGHTLY = "https://ziglang.org/builds/zig-{host_platform}-{version}.{
 # generous enough to host the artifacts, which we use.
 URL_FORMAT_BAZELMIRROR = "https://mirror.bazel.build/" + URL_FORMAT_NIGHTLY.lstrip("https://")
 
-_VERSION = "0.11.0-dev.1796+c9e02d3e6"
+_VERSION = "0.11.0-dev.2545+311d50f9d"
 
 _HOST_PLATFORM_SHA256 = {
-    "linux-aarch64": "5902b34b463635b25c11555650d095eb5030e2a05d8a4570c091313cd1a38b12",
+    "linux-aarch64": "9a4582c534802454775d2c3db33c472f55285b5203032d55fb13c5a41cc31833",
-    "linux-x86_64": "aa9da2305fad89f648db2fd1fade9f0f9daf01d06f3b07887ad3098402794778",
+    "linux-x86_64": "b0895fe5d83dd361bd268580c9de5d5a3c42eaf966ea049bfae93eb537a88633",
-    "macos-aarch64": "51b4e88123d6cbb102f2a6665dd0d61467341f36b07bb0a8d46a37ea367b60d5",
+    "macos-aarch64": "6f9aabd01d5200fe419e5fa54846e67f8342bf4cbebb71f735a729f4daaf4190",
-    "macos-x86_64": "dd8eeae5249aa21f9e51ff4ff536a3e7bf2c0686ee78bf6032d18e74c8416c56",
+    "macos-x86_64": "4bc1f1c28637b49b4ececdc819fc3d1a5d593560b8667183f26fe861b816279b",
-    "windows-x86_64": "260f34d0d5312d2642097bb33c14ac552cd57c59a15383364df6764d01f0bfc9",
+    "windows-x86_64": "7673a442a59492235157d6e6549698fd183bd90d43db74bf93ac3611cb3aad46",
 }
 
 _HOST_PLATFORM_EXT = {
@@ -80,36 +80,6 @@ _ZIG_TOOLS = [
     "ar",
 ]
 
-_template_mapfile = """
-%s {
-    %s;
-};
-"""
-
-_template_linker = """
-#ifdef __ASSEMBLER__
-.symver {from_function}, {to_function_abi}
-#else
-__asm__(".symver {from_function}, {to_function_abi}");
-#endif
-"""
-
-def _glibc_hack(from_function, to_function_abi):
-    # Cannot use .format(...) here, because starlark thinks
-    # that the byte 3 (the opening brace on the first line)
-    # is a nested { ... }, returning an error:
-    # Error in format: Nested replacement fields are not supported
-    to_function, to_abi = to_function_abi.split("@")
-    mapfile = _template_mapfile % (to_abi, to_function)
-    header = _template_linker.format(
-        from_function = from_function,
-        to_function_abi = to_function_abi,
-    )
-    return struct(
-        mapfile = mapfile,
-        header = header,
-    )
-
 def _quote(s):
     return "'" + s.replace("'", "'\\''") + "'"
 
@@ -252,16 +222,6 @@ def _zig_repository_impl(repository_ctx):
             )
             repository_ctx.symlink("tools/launcher{}".format(exe), tool_path)
 
-    fcntl_hack = _glibc_hack("fcntl64", "fcntl@GLIBC_2.2.5")
-    repository_ctx.file("glibc-hacks/fcntl.map", content = fcntl_hack.mapfile)
-    repository_ctx.file("glibc-hacks/fcntl.h", content = fcntl_hack.header)
-    res_search_amd64 = _glibc_hack("res_search", "__res_search@GLIBC_2.2.5")
-    repository_ctx.file("glibc-hacks/res_search-amd64.map", content = res_search_amd64.mapfile)
-    repository_ctx.file("glibc-hacks/res_search-amd64.h", content = res_search_amd64.header)
-    res_search_arm64 = _glibc_hack("res_search", "__res_search@GLIBC_2.17")
-    repository_ctx.file("glibc-hacks/res_search-arm64.map", content = res_search_arm64.mapfile)
-    repository_ctx.file("glibc-hacks/res_search-arm64.h", content = res_search_arm64.header)
-
 zig_repository = repository_rule(
     attrs = {
         "version": attr.string(),

toolchain/private/defs.bzl

@@ -121,16 +121,6 @@ def _target_windows(gocpu, zigcpu):
 def _target_linux_gnu(gocpu, zigcpu, glibc_version):
     glibc_suffix = "gnu.{}".format(glibc_version)
 
-    compiler_extra_includes = []
-    linker_version_scripts = []
-    if glibc_version < "2.28":
-        # https://github.com/ziglang/zig/issues/5882#issuecomment-888250676
-        compiler_extra_includes.append("glibc-hacks/fcntl.h")
-        linker_version_scripts.append("glibc-hacks/fcntl.map")
-    if glibc_version < "2.34":
-        compiler_extra_includes.append("glibc-hacks/res_search-{}.h".format(gocpu))
-        linker_version_scripts.append("glibc-hacks/res_search-{}.map".format(gocpu))
-
     return struct(
         gotarget = "linux_{}_{}".format(gocpu, glibc_suffix),
         zigtarget = "{}-linux-{}".format(zigcpu, glibc_suffix),
@@ -143,8 +133,6 @@ def _target_linux_gnu(gocpu, zigcpu, glibc_version):
                    (["libc/include/{}-linux-any".format(zigcpu)] if zigcpu != "x86_64" else []) + [
             "libc/include/any-linux-any",
         ] + _INCLUDE_TAIL,
-        compiler_extra_includes = compiler_extra_includes,
-        linker_version_scripts = linker_version_scripts,
         dynamic_library_linkopts = [],
         copts = [],
         libc = "glibc",