How to set a copt that points to a file? Or, how to get a non-CC source into the sandbox during cc compilation

[Gary Miguel]

I have a cc_library.

I want to set "-fsanitize-ignorelist" to point to a file in my repo.

E.g., I have:

foo.cc

BUILD.bazel

ignorelist.txt

and in BUILD.bazel:

cc_library(

  name = "foo",

  copts = ["-fsanitize-ignorelist=" <TODO what goes here?>],

  srcs = ["foo.cpp"],

)

I've tried setting ignorelist.txt as a data dependency, and then referring to it with

$(location), but that doesn't work. I get:

clang: error: no such file or directory: 'bazel-out/k8-fastbuild/ignorelist.txt'

[Filip Filmar]

I recently used a dirty trick to achieve something similar. In case you want to be on your way quickly.

I suspect the issue is that a `data` dependency is not available in the sandbox used for compilation. You can verify if you run your compilation with local sandbox strategy - if it passes, then that's probably it.

What I did was to rename the file such that its name ends with ".h". It can then be used in the `hdrs`, and $location will work, and it will be available during compilation.

F

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[Filip Filmar]

On Fri, Jun 23, 2023 at 3:59 PM Filip Filmar <fil...@gmail.com> wrote:

I suspect the issue is that a `data` dependency is not available in the sandbox used for compilation.

Belated: https://bazel.build/reference/be/common-definitions#typical.data

"Files needed by this rule at runtime. "  --- so indeed, `data` is not available in the sandbox at compile time.

F

[Gary Miguel]

Thanks that works!

[Filip Filmar]

https://github.com/bazelbuild/bazel/issues/18766

It’s a feature now.

F

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