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# Copyright The OpenTelemetry Authors
# SPDX-License-Identifier: Apache-2.0
# Builds ZLIB from a distribution.
# Copied from https://github.com/protocolbuffers/protobuf/blob/master/third_party/zlib.BUILD
licenses(["notice"]) # BSD/MIT-like license (for zlib)
exports_files(["zlib.BUILD"])
_ZLIB_HEADERS = [
"crc32.h",
"deflate.h",
"gzguts.h",
"inffast.h",
"inffixed.h",
"inflate.h",
"inftrees.h",
"trees.h",
"zconf.h",
"zlib.h",
"zutil.h",
]
_ZLIB_PREFIXED_HEADERS = ["zlib/include/" + hdr for hdr in _ZLIB_HEADERS]
# In order to limit the damage from the `includes` propagation
# via `:zlib`, copy the public headers to a subdirectory and
# expose those.
genrule(
name = "copy_public_headers",
srcs = _ZLIB_HEADERS,
outs = _ZLIB_PREFIXED_HEADERS,
cmd_bash = "cp $(SRCS) $(@D)/zlib/include/",
cmd_bat = " && ".join(
["@copy /Y $(location %s) $(@D)\\zlib\\include\\ >NUL" %
s for s in _ZLIB_HEADERS],
),
)
cc_library(
name = "zlib",
srcs = [
"adler32.c",
"compress.c",
"crc32.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",
# Include the un-prefixed headers in srcs to work
# around the fact that zlib isn't consistent in its
# choice of <> or "" delimiter when including itself.
] + _ZLIB_HEADERS,
hdrs = _ZLIB_PREFIXED_HEADERS,
copts = select({
"@platforms//os:windows": [],
"//conditions:default": [
"-Wno-deprecated-non-prototype",
"-Wno-unused-variable",
"-Wno-implicit-function-declaration",
],
}),
includes = ["zlib/include/"],
visibility = ["//visibility:public"],
)
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