BUILD.gn

# Copyright 2017 The Fuchsia Authors. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
#    * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#    * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
#    * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

config("zlib_config") {
  include_dirs = [ "." ]
}

config("zlib_warnings") {
  visibility = [ ":*" ]

  cflags = [
    "-Wno-implicit-function-declaration",
    "-Wno-conversion",
    "-Wno-implicit-fallthrough",
  ]
}

# TODO(36315): Remove workaround for Rust host_toolchain
config("zlib_config_for_rust_host") {
  # Without `-fPIC`, we get the error:
  # > ld.lld: error: can't create dynamic relocation R_X86_64_64 against local symbol in readonly
  # > segment
  cflags = [ "-fPIC" ]
}

if (is_fuchsia) {
  shared_library("zlib") {
    output_name = "z"
    deps = [ ":zlib_static" ]

    public_configs = [ ":zlib_config" ]
  }
} else {
  group("zlib") {
    deps = [ ":zlib_static" ]

    public_configs = [ ":zlib_config" ]
  }
}

template("zlib_library") {
  target(invoker.library_type, target_name) {
    forward_variables_from(invoker, "*")

    if (!defined(rust_host)) {
      rust_host = false
    }

    sources = [
      "adler32.c",
      "compress.c",
      "crc32.c",
      "crc32.h",
      "deflate.c",
      "deflate.h",
      "gzclose.c",
      "gzguts.h",
      "gzlib.c",
      "gzread.c",
      "gzwrite.c",
      "infback.c",
      "inffast.c",
      "inffast.h",
      "inffixed.h",
      "inflate.c",
      "inflate.h",
      "inftrees.c",
      "inftrees.h",
      "trees.c",
      "trees.h",
      "uncompr.c",
      "zconf.h",
      "zlib.h",
      "zutil.c",
      "zutil.h",
    ]

    configs += [ ":zlib_warnings" ]
    configs -= [ "//build/config:symbol_visibility_hidden" ]

    public_configs = [ ":zlib_config" ]
    if (rust_host) {
      public_configs += [ ":zlib_config_for_rust_host" ]
    }
  }
}

zlib_library("zlib_static") {
  library_type = "source_set"
}

zlib_library("zlib_for_rust_host") {
  library_type = "static_library"
  rust_host = true
}

config("minizip_warnings") {
  visibility = [ ":*" ]

  cflags = [ "-Wno-implicit-function-declaration" ]

  if (is_clang) {
    # minizip uses `if ((a == b))` for some reason.
    cflags += [
      "-Wno-parentheses-equality",
      "-Wno-unknown-warning-option",
      "-Wno-misleading-indentation",
      "-Wno-conversion",
    ]
  }
}

target(default_library_type, "minizip") {
  sources = [
    "contrib/minizip/crypt.h",
    "contrib/minizip/ioapi.c",
    "contrib/minizip/ioapi.h",
    "contrib/minizip/unzip.c",
    "contrib/minizip/unzip.h",
    "contrib/minizip/zip.c",
    "contrib/minizip/zip.h",
  ]

  deps = [ ":zlib" ]
  configs += [ ":minizip_warnings" ]
  configs -= [ "//build/config:symbol_visibility_hidden" ]
  public_configs = [ ":zlib_config" ]
}

source_set("zfstream") {
  sources = [
    "contrib/iostream3/zfstream.cc",
    "contrib/iostream3/zfstream.h",
  ]

  deps = [ ":zlib" ]
  configs += [ ":zlib_warnings" ]
  public_configs = [ ":zlib_config" ]
}