# file      : build/root.build
# license   : GNU GPL v3; see accompanying LICENSE file

# This configuration variable can be used to specify the GCC plugin directory
# instead of auto-discovering it with -print-file-name=plugin. Primarily
# useful when dealing with cross-compilation.
#
config [dir_path, config.report.variable=plugin_dir] \
  config.odb.plugin_dir ?= [null]

# This configuration variable can be used to specify the GCC g++ executable
# name that will be called by the ODB compiler instead of auto-deriving it
# from config.cxx. Primarily useful when dealing with cross-compilation.
#
config [string, config.report.variable=gxx_name] \
  config.odb.gxx_name ?= [null]

config [bool] config.odb.develop ?= false

develop = $config.odb.develop

define cli: file
cli{*}: extension = cli

cxx.std = latest

using cxx

hxx{*}: extension = hxx
ixx{*}: extension = ixx
txx{*}: extension = txx
cxx{*}: extension = cxx

if ($cxx.target.system == 'win32-msvc')
  cxx.poptions += -D_CRT_SECURE_NO_WARNINGS -D_SCL_SECURE_NO_WARNINGS

if ($cxx.class == 'msvc')
  cxx.coptions += /wd4251 /wd4275 /wd4800

cxx.poptions =+ "-I$out_root" "-I$src_root"

# Specify the test target for cross-testing.
#
test.target = $cxx.target

# Omit the rest during the skeleton load.
#
if ($build.mode != 'skeleton')
{
  if ($cxx.id != 'gcc')
    fail 'ODB compiler can only be built with GCC'

  # Determine the GCC plugin directory unless specified explicitly.
  #
  if ($config.odb.plugin_dir != [null])
    plugin_dir = $config.odb.plugin_dir
  else
  {
    # If plugin support is disabled, then -print-file-name will print the name
    # we have passed (the real plugin directory will always be absolute).
    #
    plugin_dir = [dir_path] $process.run($cxx.path -print-file-name=plugin)

    if ("$plugin_dir" == plugin)
      fail "$recall($cxx.path) does not support plugins"
  }

  # It can also include '..' components (e.g., on Windows) so normalize it for
  # good measure.
  #
  plugin_dir = $normalize($plugin_dir)

  # Determine the g++ executable name unless specified explicitly.
  #
  if ($config.odb.gxx_name != [null])
    gxx_name = $config.odb.gxx_name
  else
  {
    # Unless cross-compiling, pass the C++ compiler's recall path as the g++
    # name.
    #
    # Note that we used to compare complete target triplets but that prooved
    # too strict. For example, we may be running on x86_64-apple-darwin17.7.0
    # while the compiler is targeting x86_64-apple-darwin17.3.0.
    #
    if ($cxx.target.cpu    == $build.host.cpu && \
        $cxx.target.system == $build.host.system)
    {
      gxx_name = $recall($cxx.path)
    }
    else
      fail "g++ executable name must be specified explicitly with \
config.odb.gxx_name when cross-compiling"
  }

  # Extract the copyright notice from the LICENSE file.
  #
  # Note that cat is a builtin which means this is both portable and fast.
  #
  copyright = $process.run_regex(cat $src_root/LICENSE,    \
                                 'Copyright \(c\) (.+)\.', \
                                 '\1')
}
else
{
  # Set for report.
  #
  plugin_dir = [null]
  gxx_name = [null]
}