[llvm] [libc][bazel] Add py_binary rule to build hdrgen. (PR #129161)

[Alexey Samsonov via llvm-commits]

https://github.com/vonosmas created https://github.com/llvm/llvm-project/pull/129161

None

>From 5d9e4083f1e37cea915c7047ebb8bb01ddde1b25 Mon Sep 17 00:00:00 2001
From: Alexey Samsonov <vonosmas at gmail.com>
Date: Thu, 27 Feb 2025 16:27:57 -0800
Subject: [PATCH] [libc][bazel] Add py_binary rule to build hdrgen.

---
 utils/bazel/llvm-project-overlay/libc/BUILD.bazel | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/utils/bazel/llvm-project-overlay/libc/BUILD.bazel b/utils/bazel/llvm-project-overlay/libc/BUILD.bazel
index b45145acc2cfe..cc0c7c65b736b 100644
--- a/utils/bazel/llvm-project-overlay/libc/BUILD.bazel
+++ b/utils/bazel/llvm-project-overlay/libc/BUILD.bazel
@@ -5,6 +5,7 @@
 # LLVM libc project.
 load("@bazel_skylib//lib:selects.bzl", "selects")
 load("@bazel_skylib//rules:common_settings.bzl", "string_flag")
+load("@rules_python//python:defs.bzl", "py_binary")
 load(
     ":libc_build_rules.bzl",
     "libc_function",
@@ -51,6 +52,14 @@ config_setting(
     flag_values = {":mpfr": "system"},
 )
 
+########################### Header Generation ##################################
+
+py_binary(
+    name = "hdrgen",
+    srcs = glob(["utils/hdrgen/hdrgen/**/*.py"]),
+    imports = ["utils/hdrgen"],
+)
+
 ################################## Base Config #################################
 
 libc_support_library(