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hermetic_cc_toolchain/toolchain/private/cc_toolchains.bzl

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defs: fix import paths Empirically these need to come from most specfic to least specific. The error message is as follows: In file included from test/c/main.c:1: In file included from external/zig_sdk/lib/libcxx/include/stdio.h:107: In file included from external/zig_sdk/lib/libc/include/generic-glibc/stdio.h:38: external/zig_sdk/lib/libc/include/generic-glibc/bits/types.h:139:3: error: # error ^ external/zig_sdk/lib/libc/include/generic-glibc/bits/types.h:145:1: error: unknown type name '__STD_TYPE' __STD_TYPE __DEV_T_TYPE __dev_t; /* Type of device numbers. */ Dissected `generic-glibc/bits/types.h:#error`: #if __WORDSIZE == 32 <...> # define __STD_TYPE __extension__ typedef #elif __WORDSIZE == 64 <...> # define __STD_TYPE typedef #else # error #endif So we do not have the `__WORDSIZE`. Where does that come from? Probably from a directory that has an `x86_64` in it. How does that get included? Let's start with `lib/libcxx/include/stdio.h`: 16 #include_next <stdio.h> Now previously our `c++` command line looked like this: external/zig_sdk/tools/c++ \ <...> -Iexternal/zig_sdk/lib/include \ -Iexternal/zig_sdk/lib/libcxx/include \ -Iexternal/zig_sdk/lib/libcxxabi/include \ -Iexternal/zig_sdk/lib/libunwind/include \ -Iexternal/zig_sdk/lib/libc/include/generic-glibc \ -Iexternal/zig_sdk/lib/libc/include/any-linux-any \ -Iexternal/zig_sdk/lib/libc/include/x86_64-linux-gnu \ -Iexternal/zig_sdk/lib/libc/include/x86_64-linux-any \ -Iexternal/zig_sdk/lib/libc/include/x86-linux-any \ -Iexternal/zig_sdk/glibc-hacks \ <...> So the next place it will find `stdio.h` is in `generic-glibc`, which already uses the `__WORDSIZE`. If we make the "next" include to be the arch-specific one instead of the generic-glibc, things start compiling again. Fix the same fo musl.
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load(":defs.bzl", "target_structs", "zig_tool_path")
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load("@bazel-zig-cc//toolchain:zig_toolchain.bzl", "zig_cc_toolchain_config")
DEFAULT_TOOL_PATHS = {
"ar": "ar",
"gcc": "c++", # https://github.com/bazelbuild/bazel/issues/4644
"cpp": "/usr/bin/false",
"gcov": "/usr/bin/false",
"nm": "/usr/bin/false",
"objdump": "/usr/bin/false",
"strip": "/usr/bin/false",
}.items()
def declare_cc_toolchains(os, zig_sdk_path, zig_include_root):
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for target_config in target_structs():
gotarget = target_config.gotarget
zigtarget = target_config.zigtarget
cxx_builtin_include_directories = []
for d in getattr(target_config, "toplevel_include", []):
cxx_builtin_include_directories.append(zig_sdk_path + "/" + d)
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absolute_tool_paths = {}
for name, path in target_config.tool_paths.items() + DEFAULT_TOOL_PATHS:
if path[0] == "/":
absolute_tool_paths[name] = path
continue
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tool_path = zig_tool_path(os).format(zig_tool = path)
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absolute_tool_paths[name] = tool_path
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linkopts = target_config.linkopts
dynamic_library_linkopts = target_config.dynamic_library_linkopts
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copts = target_config.copts
for s in getattr(target_config, "linker_version_scripts", []):
linkopts = linkopts + ["-Wl,--version-script,%s/%s" % (zig_sdk_path, s)]
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for incl in getattr(target_config, "compiler_extra_includes", []):
copts = copts + ["-include", zig_sdk_path + "/" + incl]
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zig_cc_toolchain_config(
name = zigtarget + "_cc_config",
target = zigtarget,
tool_paths = absolute_tool_paths,
cxx_builtin_include_directories = cxx_builtin_include_directories,
copts = copts,
linkopts = linkopts,
dynamic_library_linkopts = dynamic_library_linkopts,
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target_cpu = target_config.bazel_target_cpu,
target_system_name = "unknown",
target_libc = "unknown",
compiler = "clang",
abi_version = "unknown",
abi_libc_version = "unknown",
defs: fix import paths Empirically these need to come from most specfic to least specific. The error message is as follows: In file included from test/c/main.c:1: In file included from external/zig_sdk/lib/libcxx/include/stdio.h:107: In file included from external/zig_sdk/lib/libc/include/generic-glibc/stdio.h:38: external/zig_sdk/lib/libc/include/generic-glibc/bits/types.h:139:3: error: # error ^ external/zig_sdk/lib/libc/include/generic-glibc/bits/types.h:145:1: error: unknown type name '__STD_TYPE' __STD_TYPE __DEV_T_TYPE __dev_t; /* Type of device numbers. */ Dissected `generic-glibc/bits/types.h:#error`: #if __WORDSIZE == 32 <...> # define __STD_TYPE __extension__ typedef #elif __WORDSIZE == 64 <...> # define __STD_TYPE typedef #else # error #endif So we do not have the `__WORDSIZE`. Where does that come from? Probably from a directory that has an `x86_64` in it. How does that get included? Let's start with `lib/libcxx/include/stdio.h`: 16 #include_next <stdio.h> Now previously our `c++` command line looked like this: external/zig_sdk/tools/c++ \ <...> -Iexternal/zig_sdk/lib/include \ -Iexternal/zig_sdk/lib/libcxx/include \ -Iexternal/zig_sdk/lib/libcxxabi/include \ -Iexternal/zig_sdk/lib/libunwind/include \ -Iexternal/zig_sdk/lib/libc/include/generic-glibc \ -Iexternal/zig_sdk/lib/libc/include/any-linux-any \ -Iexternal/zig_sdk/lib/libc/include/x86_64-linux-gnu \ -Iexternal/zig_sdk/lib/libc/include/x86_64-linux-any \ -Iexternal/zig_sdk/lib/libc/include/x86-linux-any \ -Iexternal/zig_sdk/glibc-hacks \ <...> So the next place it will find `stdio.h` is in `generic-glibc`, which already uses the `__WORDSIZE`. If we make the "next" include to be the arch-specific one instead of the generic-glibc, things start compiling again. Fix the same fo musl.
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visibility = ["//visibility:private"],
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)
native.cc_toolchain(
name = zigtarget + "_cc",
toolchain_identifier = zigtarget + "-toolchain",
toolchain_config = ":%s_cc_config" % zigtarget,
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all_files = "@zig_sdk//:all",
ar_files = "@zig_sdk//:all",
compiler_files = "@zig_sdk//:all",
linker_files = "@zig_sdk//:all",
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dwp_files = "@zig_sdk//:empty",
objcopy_files = "@zig_sdk//:empty",
strip_files = "@zig_sdk//:empty",
supports_param_files = 0,
defs: fix import paths Empirically these need to come from most specfic to least specific. The error message is as follows: In file included from test/c/main.c:1: In file included from external/zig_sdk/lib/libcxx/include/stdio.h:107: In file included from external/zig_sdk/lib/libc/include/generic-glibc/stdio.h:38: external/zig_sdk/lib/libc/include/generic-glibc/bits/types.h:139:3: error: # error ^ external/zig_sdk/lib/libc/include/generic-glibc/bits/types.h:145:1: error: unknown type name '__STD_TYPE' __STD_TYPE __DEV_T_TYPE __dev_t; /* Type of device numbers. */ Dissected `generic-glibc/bits/types.h:#error`: #if __WORDSIZE == 32 <...> # define __STD_TYPE __extension__ typedef #elif __WORDSIZE == 64 <...> # define __STD_TYPE typedef #else # error #endif So we do not have the `__WORDSIZE`. Where does that come from? Probably from a directory that has an `x86_64` in it. How does that get included? Let's start with `lib/libcxx/include/stdio.h`: 16 #include_next <stdio.h> Now previously our `c++` command line looked like this: external/zig_sdk/tools/c++ \ <...> -Iexternal/zig_sdk/lib/include \ -Iexternal/zig_sdk/lib/libcxx/include \ -Iexternal/zig_sdk/lib/libcxxabi/include \ -Iexternal/zig_sdk/lib/libunwind/include \ -Iexternal/zig_sdk/lib/libc/include/generic-glibc \ -Iexternal/zig_sdk/lib/libc/include/any-linux-any \ -Iexternal/zig_sdk/lib/libc/include/x86_64-linux-gnu \ -Iexternal/zig_sdk/lib/libc/include/x86_64-linux-any \ -Iexternal/zig_sdk/lib/libc/include/x86-linux-any \ -Iexternal/zig_sdk/glibc-hacks \ <...> So the next place it will find `stdio.h` is in `generic-glibc`, which already uses the `__WORDSIZE`. If we make the "next" include to be the arch-specific one instead of the generic-glibc, things start compiling again. Fix the same fo musl.
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visibility = ["//visibility:private"],
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)