[llvm] [bazel] Fix modules build for llvm-libc (speculative) (PR #143995)

[Reid Kleckner via llvm-commits]

https://github.com/rnk created https://github.com/llvm/llvm-project/pull/143995

None

>From f1a8374ba8a86ad6bbb361229cce59bb2c178991 Mon Sep 17 00:00:00 2001
From: Reid Kleckner <rnk at google.com>
Date: Thu, 12 Jun 2025 23:36:16 +0000
Subject: [PATCH] [bazel] Fix modules build for llvm-libc (speculative)

---
 utils/bazel/llvm-project-overlay/libc/BUILD.bazel          | 7 +++++++
 .../llvm-project-overlay/libc/test/UnitTest/BUILD.bazel    | 1 +
 2 files changed, 8 insertions(+)

diff --git a/utils/bazel/llvm-project-overlay/libc/BUILD.bazel b/utils/bazel/llvm-project-overlay/libc/BUILD.bazel
index 0cedad2859247..84a6b7d230442 100644
--- a/utils/bazel/llvm-project-overlay/libc/BUILD.bazel
+++ b/utils/bazel/llvm-project-overlay/libc/BUILD.bazel
@@ -1619,6 +1619,10 @@ libc_header_library(
 libc_support_library(
     name = "__support_libc_errno",
     hdrs = ["src/__support/libc_errno.h"],
+    deps = [
+        ":__support_macros_config",
+        ":hdr_errno_macros",
+    ],
 )
 
 libc_support_library(
@@ -1981,6 +1985,9 @@ libc_support_library(
 libc_support_library(
     name = "__support_math_exp_float_constants",
     hdrs = ["src/__support/math/exp_float_constants.h"],
+    deps = [
+        ":__support_macros_config",
+    ],
 )
 
 libc_support_library(
diff --git a/utils/bazel/llvm-project-overlay/libc/test/UnitTest/BUILD.bazel b/utils/bazel/llvm-project-overlay/libc/test/UnitTest/BUILD.bazel
index b37ec19330236..2354337da2dc5 100644
--- a/utils/bazel/llvm-project-overlay/libc/test/UnitTest/BUILD.bazel
+++ b/utils/bazel/llvm-project-overlay/libc/test/UnitTest/BUILD.bazel
@@ -58,6 +58,7 @@ libc_test_library(
         "//libc:__support_fputil_fp_bits",
         "//libc:__support_fputil_fpbits_str",
         "//libc:__support_fputil_rounding_mode",
+        "//libc:__support_libc_errno",
         "//libc:__support_macros_config",
         "//libc:__support_macros_properties_architectures",
         "//libc:__support_macros_properties_types",