build/unification/config/BUILD.gn

# Copyright 2019 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

declare_args() {
  # Use this flag to optimize source libraries imported from Zircon the same was
  # as other libraries in this build.
  # By default, they are optimized the same as in the ZN build, which leaves
  # less debugging information available.
  debug_zircon_libraries_more = false
}

# The following config is applied to code migrated from the ZN build and is a
# stepping stone to full conversion to the GN build.
# It should not be used on any target native to the GN build.

config("zircon-migrated") {
  compiler_flags = [
    "-O2",
    "-no-canonical-prefixes",
  ]

  cflags = compiler_flags + [
             "-fno-omit-frame-pointer",
             "-fno-common",
             "-UNDEBUG",
             "-U_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS",
           ]

  cflags_c = [
    "-Wwrite-strings",
    "-Wstrict-prototypes",
  ]

  cflags_cc = [
    "-Wextra-semi",
    "-Wconversion",
    "-Wno-sign-conversion",
    "-ftemplate-backtrace-limit=0",
    "-fno-threadsafe-statics",
  ]

  ldflags = compiler_flags + [
              "-Wl,-z,combreloc",
              "-Wl,-z,relro",
              "-Wl,-z,now",
              "-Wl,-z,text",
              "-Wl,-z,max-page-size=4096",
            ]

  asmflags = compiler_flags

  defines = [
    "_ALL_SOURCE",
    "ZX_ASSERT_LEVEL=2",
    "WITH_FRAME_POINTERS=1",
  ]
}

# The following config is applied to source C/C++ libraries imported from ZN so
# that they are as optimized as in the ZN build.

config("zircon-library") {
  compiler_flags = []

  if (!debug_zircon_libraries_more) {
    compiler_flags += [
      "-O2",
      "-no-canonical-prefixes",
    ]
  }

  cflags = compiler_flags

  ldflags = compiler_flags

  asmflags = compiler_flags

  defines = [ "_ALL_SOURCE" ]
}