Do not pass --Clink-arg=-l for libstd and libtest
#1500
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krasimirgg
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Aug 5, 2022
scentini
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Aug 9, 2022
#1500 added an additional `for_windows` parameter to `get_lib_name`. I missed the fact that we also pass that function to `map_each` here: https://github.com/bazelbuild/rules_rust/blob/main/rust/private/rustc.bzl#L1671 and as such, this code does not always work correctly (we don't get to pass the `for_windows` parameter, and internally at Google it ended up evaluating to `True` on Linux builds). I tried to avoid flattening the `cc_toolchain.dynamic_runtime_lib` and `cc_toolchain.static_runtime_lib` depsets by using a lambda: ``` args.add_all( cc_toolchain.dynamic_runtime_lib(feature_configuration = feature_configuration), map_each = lambda x: get_lib_name(x, for_windows = toolchain.os.startswith("windows)), format_each = "-ldylib=%s", ) ``` However it looks like such usage of lambdas is not allowed: ``` Error in add_all: to avoid unintended retention of analysis data structures, the map_each function (declared at ...) must be declared by a top-level def statement ``` So instead of `get_lib_name` we now have `get_lib_name_default` and `get_lib_name_for_windows`.
This was referenced May 3, 2024
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Fixes #1374
We skip adding
-Clink-arg=-l...for libstd and libtest from the standard library, as these two libraries are present both as an.rliband a.soformat. On linux, Rustc adds a -Bdynamic to the linker command line before the libraries specified with-Clink-arg, which leads to us linking against the.sos but not putting the corresponding value to the runtime library search paths, which results in a "cannot open shared object file: No such file or directory" error at exectuion time. We can fix this by adding a-Clink-arg=-Bstaticon linux, but we don't have that option for macos. The proper solution for this issue would be to removelibtest-{hash}.soandlibstd-{hash}.sofrom the toolchain. However, it is not enough to change the toolchain'srust_std_{...}filegroups here:rules_rust/rust/private/repository_utils.bzl
Line 144 in a9d5d89
This PR also fixes the following issues for Windows:
libc-Clink-argshould point to the library name with extension included for windows.