Add zlib repository including minimal build description

This allows to replace "-lz" (hermetic prebuilt zlib) by "@zlib" (built from
sources).

Bug: 315488400
Bug: 339377804
Change-Id: Ib1a40c491109dfae896c1b4f1326a49550425f5b
Signed-off-by: Matthias Maennich <maennich@google.com>

4 files changed, 79 insertions, 2 deletions

diff --git a/kleaf/bzlmod/bazel.MODULE.bazel b/kleaf/bzlmod/bazel.MODULE.bazel
index 7830caf8..5e26616f 100644
--- a/kleaf/bzlmod/bazel.MODULE.bazel
+++ b/kleaf/bzlmod/bazel.MODULE.bazel
@@ -43,6 +43,12 @@ new_kleaf_local_repository(
 )
 
 new_kleaf_local_repository(
+    name = "zlib",
+    build_file = "build/kernel/kleaf/zlib.BUILD",
+    path = "external/zlib",
+)
+
+new_kleaf_local_repository(
     name = "zopfli",
     build_file = "build/kernel/kleaf/zopfli.BUILD",
     path = "external/zopfli",
diff --git a/kleaf/pigz.BUILD b/kleaf/pigz.BUILD
index 6d6642b4..8e3c6be1 100644
--- a/kleaf/pigz.BUILD
+++ b/kleaf/pigz.BUILD
@@ -22,8 +22,10 @@ cc_binary(
     linkopts = [
         "-lm",
         "-lpthread",
-        "-lz",
     ],
     visibility = ["//visibility:public"],
-    deps = ["@zopfli"],
+    deps = [
+        "@zlib",
+        "@zopfli",
+    ],
 )
diff --git a/kleaf/workspace.bzl b/kleaf/workspace.bzl
index 5e791590..13eba05f 100644
--- a/kleaf/workspace.bzl
+++ b/kleaf/workspace.bzl
@@ -156,6 +156,12 @@ WARNING: define_kleaf_workspace() should be called with common_kernel_package={}
     )
 
     new_kleaf_local_repository(
+        name = "zlib",
+        path = "external/zlib",
+        build_file = "build/kernel/kleaf/zlib.BUILD",
+    )
+
+    new_kleaf_local_repository(
         name = "zopfli",
         path = "external/zopfli",
         build_file = "build/kernel/kleaf/zopfli.BUILD",
diff --git a/kleaf/zlib.BUILD b/kleaf/zlib.BUILD
new file mode 100644
index 00000000..c92907ad
--- /dev/null
+++ b/kleaf/zlib.BUILD
@@ -0,0 +1,63 @@
+# Copyright (C) 2024 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+cc_library(
+    name = "zlib",
+    srcs = [
+        "adler32.c",
+        "compress.c",
+        "contrib/optimizations/insert_string.h",
+        "cpu_features.c",
+        "crc32.c",
+        "crc_folding.c",
+        "deflate.c",
+        "gzclose.c",
+        "gzlib.c",
+        "gzread.c",
+        "gzwrite.c",
+        "infback.c",
+        "inffast.c",
+        "inflate.c",
+        "inftrees.c",
+        "trees.c",
+        "uncompr.c",
+        "zutil.c",
+    ],
+    hdrs = [
+        "cpu_features.h",
+        "crc32.h",
+        "deflate.h",
+        "gzguts.h",
+        "inffast.h",
+        "inffixed.h",
+        "inflate.h",
+        "inftrees.h",
+        "trees.h",
+        "zconf.h",
+        "zlib.h",
+        "zutil.h",
+    ],
+    copts = [
+        "-O3",
+        "-Wall",
+        "-Werror",
+        "-Wno-deprecated-non-prototype",
+        "-Wno-unused",
+        "-Wno-unused-parameter",
+        # Use the traditional Rabin-Karp rolling hash to match zlib DEFLATE output exactly.
+        "-DCHROMIUM_ZLIB_NO_CASTAGNOLI",
+    ],
+    includes = ["."],
+    visibility = ["//visibility:public"],
+)