[llvm] Add a filegroup containing _all_ sources to the libc build rules (PR #169155)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-libc

Author: Chandler Carruth (chandlerc)

<details>
<summary>Changes</summary>

These rules already expose a filegroup containing the _dependencies_, but that misses the source files directly in the top level library.

Without this filegroup, there isn't a way to access the source files used by libcxx when building it, etc.

That said, if there is a better way to do this or a different design, let me know. Not super familiar with the Bazel logic for llvm-libc.

---
Full diff: https://github.com/llvm/llvm-project/pull/169155.diff


1 Files Affected:

- (modified) utils/bazel/llvm-project-overlay/libc/libc_build_rules.bzl (+6) 


``````````diff
diff --git a/utils/bazel/llvm-project-overlay/libc/libc_build_rules.bzl b/utils/bazel/llvm-project-overlay/libc/libc_build_rules.bzl
index 0f2965369c296..c871334dd95b3 100644
--- a/utils/bazel/llvm-project-overlay/libc/libc_build_rules.bzl
+++ b/utils/bazel/llvm-project-overlay/libc/libc_build_rules.bzl
@@ -247,6 +247,12 @@ def libc_header_library(name, hdrs, deps = [], **kwargs):
         **kwargs
     )
 
+    _libc_srcs_filegroup(
+        name = name + "_hdrs",
+        libs = [":" + name],
+        enforce_headers_only = True,
+    )
+
 def libc_generated_header(name, hdr, yaml_template, other_srcs = []):
     """Generates a libc header file from YAML template.
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/169155