compiler-rt-libc-*-dev not available in nixpkgs cc toolchain

[iphydf]

Describe the bug #include <sanitizer/msan_interface.h> fails to compile on bazel with nixpkgs. It works with clang++.

To Reproduce Create a C file with #include <sanitizer/msan_interface.h> in it. Observe:

myfile.c:1:10: fatal error: 'sanitizer/msan_interface.h' file not found

Expected behavior It should compile.

Environment

• OS name + version: NixOS 23.05
• Version of the code: v0.10.0

Additional context The include directory is known to clang++:

[nix-shell:/src/workspace]$ clang++ -c -xc++ - -v
...
 /nix/store/l4mfdpx5d4ybn6ki1gjhlcmz6hv5p6kh-compiler-rt-libc-16.0.1-dev/include
...

[avdv]

Hi.

I think you should be able to use the library like any other, e.g. with

nixpkgs_package(
    name = "compiler-rt-libc",
    attribute_path = "llvmPackages_16.compiler-rt-libc",
    nix_file_content = """import <nixpkgs> { }""",
    repository = "@nixpkgs",
)

nixpkgs_package(
    name = "compiler-rt-libc.dev",
    attribute_path = "llvmPackages_16.compiler-rt-libc.dev",
    build_file_content = """\
load("@rules_cc//cc:defs.bzl", "cc_library")
filegroup(
    name = "include",
    srcs = glob(["include/**/*.h"]),
    visibility = ["//visibility:public"],
)
cc_library(
    name = "compiler-rt-libc",
    srcs = ["@compiler-rt-libc//:lib"],
    hdrs = [":include"],
    strip_include_prefix = "include",
    visibility = ["//visibility:public"],
)
""",
    nix_file_content = """import <nixpkgs> { }""",
    repository = "@nixpkgs",
)

[iphydf]

The problem is that Go stdlib uses that (when compiling with msan) but doesn't declare it, because it's assumed to be part of the toolchain. Same with absl and probably other third party dependencies.