# This file is used by GN for building, which is NOT the build system used for
# building official binaries.
# Please edit the gyp files if you are making changes to build system.

declare_args() {
  # Do not build optimized assembly for OpenSSL
  # FIXME(zcbenz): asm code does not compile with clang.
  openssl_no_asm = true
}

# The actual configurations are put inside a template in unofficial.gni to
# prevent accidental edits from contributors.
template("openssl_gn_build") {
  config("openssl_external_config") {
    include_dirs = [
      "openssl/crypto/include",
      "openssl/include",
    ]
  }

  config("openssl_internal_config") {
    gypi_values = exec_script("../../tools/gypi_to_gn.py",
                              [ rebase_path("openssl.gypi") ],
                              "scope",
                              [ "openssl.gypi" ])

    defines = [
      "MODULESDIR=\"deps/openssl/lib/openssl-modules\"",
      "OPENSSL_API_COMPAT=0x10100001L",
      "STATIC_LEGACY",
    ] + gypi_values.openssl_default_defines_all
    if (is_win) {
      defines += [
        ## default of Win. See INSTALL in openssl repo.
        "OPENSSLDIR=\"C:\\\Program\ Files\\\Common\ Files\\\SSL\"",
        "ENGINESDIR=\"NUL\"",
        "OPENSSL_SYS_WIN32", "WIN32_LEAN_AND_MEAN", "L_ENDIAN",
        "_CRT_SECURE_NO_DEPRECATE", "UNICODE", "_UNICODE",
      ]
    } else if (is_mac) {
      defines += [
        "OPENSSLDIR=\"/System/Library/OpenSSL/\"",
        "ENGINESDIR=\"/dev/null\"",
      ]
    } else {
      defines += [
        "OPENSSLDIR=\"/etc/ssl\"",
        "ENGINESDIR=\"/dev/null\"",
        "TERMIOS",
      ]
    }

    if (is_posix) {
      asmflags = [ "-fPIC" ]
      cflags = [ "-fPIC" ]
      ldflags = [ "-fPIC" ]
    }
    if (is_clang || !is_win) {
      cflags_c = [
        "-Wno-atomic-alignment",
        "-Wno-constant-conversion",
        "-Wno-implicit-fallthrough",
        "-Wno-implicit-function-declaration",
        "-Wno-sign-compare",
        "-Wno-unknown-escape-sequence",
        "-Wno-unreachable-code",
        "-Wno-unreachable-code-break",
        "-Wno-unreachable-code-return",
        "-Wno-unused-function",
      ]
    }
    if (is_win) {
      libs = [ "crypt32.lib" ]
    } else if (is_linux) {
      libs = [ "atomic" ]
    }

    common_gypi_values = exec_script("../../tools/gypi_to_gn.py",
                                     [ rebase_path("openssl_common.gypi") ],
                                     "scope",
                                     [ "openssl_common.gypi" ])
    include_dirs = common_gypi_values.include_dirs
  }

  static_library(target_name) {
    forward_variables_from(invoker, "*")

    configs += [ ":openssl_internal_config" ]
    public_configs = [ ":openssl_external_config" ]

    if (is_posix) {
      configs -= [ "//build/config/gcc:symbol_visibility_hidden" ]
      configs += [ "//build/config/gcc:symbol_visibility_default" ]
    }

    config_path_name = ""
    if (is_win) {
      if (current_cpu == "x86") {
        config_path_name = "VC-WIN32"
      } else if (current_cpu == "x64") {
        config_path_name = "VC-WIN64A"
      } else if (current_cpu == "arm64") {
        config_path_name = "VC-WIN64-ARM"
      }
    } else if (is_linux) {
      if (current_cpu == "x86") {
        config_path_name = "linux-elf"
      } else if (current_cpu == "x64") {
        config_path_name = "linux-x86_64"
      } else if (current_cpu == "arm") {
        config_path_name = "linux-armv4"
      } else if (current_cpu == "arm64") {
        config_path_name = "linux-aarch64"
      }
    } else if (is_apple) {
      if (current_cpu == "x86") {
        config_path_name = "darwin-i386-cc"
      } else if (current_cpu == "x64") {
        config_path_name = "darwin64-x86_64-cc"
      } else if (current_cpu == "arm64") {
        config_path_name = "darwin64-arm64-cc"
      }
    }
    assert(config_path_name != "", "Unsupported platform")

    # GN variables can not have - in name.
    config_name = string_replace(config_path_name, "-", "_")

    if (openssl_no_asm) {
      asm_name = "no-asm"
    } else {
      # TODO(zcbenz): Check gas_version and nasm_version.
      asm_name = "asm_avx2"
    }
    if (is_win && current_cpu == "arm64") {
      asm_name = "no-asm"
    }
    config_path = "config/archs/" + config_path_name + "/" + asm_name

    gypi_values = exec_script("../../tools/gypi_to_gn.py",
                              [ rebase_path(config_path + "/openssl.gypi"), ],
                              "scope",
                              [ config_path + "/openssl.gypi" ])

    include_dirs = rebase_path(gypi_values.include_dirs, ".", config_path)
    defines = gypi_values["openssl_defines_" + config_name]
    sources = filter_exclude(gypi_values.openssl_sources +
                             gypi_values["openssl_sources_" + config_name],
                             [ "*.ld" ])
  }
}