# encoding: UTF-8
# Author:: Couchbase <info@couchbase.com>
# Copyright:: 2011, 2012 Couchbase, Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

ENV['RC_ARCHS'] = '' if RUBY_PLATFORM =~ /darwin/

require 'mkmf'

LIBDIR = Config::CONFIG['libdir']
INCLUDEDIR = Config::CONFIG['includedir']

HEADER_DIRS = [
  # First search /opt/local for macports
  '/opt/local/include',
  # Then search /usr/local for people that installed from source
  '/usr/local/include',
  # Check the ruby install locations
  INCLUDEDIR,
  # Finally fall back to /usr
  '/usr/include'
]

LIB_DIRS = [
  # First search /opt/local for macports
  '/opt/local/lib',
  # Then search /usr/local for people that installed from source
  '/usr/local/lib',
  # Check the ruby install locations
  LIBDIR,
  # Finally fall back to /usr
  '/usr/lib'
]

# For people using homebrew
brew_prefix = `brew --prefix libevent 2> /dev/null`.chomp
unless brew_prefix.empty?
  LIB_DIRS.unshift File.join(brew_prefix, 'lib')
  HEADER_DIRS.unshift File.join(brew_prefix, 'include')
end

HEADER_DIRS.delete_if{|d| !File.exists?(d)}
LIB_DIRS.delete_if{|d| !File.exists?(d)}

def define(macro, value = nil)
  $defs.push("-D #{[macro.upcase, value].compact.join('=')}")
end

# it will find the libcouchbase likely. you can specify its path otherwise
#
#   ruby extconf.rb [--with-libcouchbase-include=<dir>] [--with-libcouchbase-lib=<dir>]
#
# or
#
#   ruby extconf.rb [--with-libcouchbase-dir=<dir>]
#
dir_config("libcouchbase", HEADER_DIRS, LIB_DIRS)

if COMMON_HEADERS !~ /"ruby\.h"/
  COMMON_HEADERS << %(#include "ruby.h"\n)
end

$CFLAGS << ' -std=c99 -Wall -Wextra '
if ENV['DEBUG']
  $CFLAGS << ' -O0 -ggdb3 -pedantic'
end

if try_compile(<<-SRC)
  #include <stdarg.h>
  int foo(int x, ...) {
    va_list va;
    va_start(va, x);
    va_arg(va, int);
    va_arg(va, char *);
    va_arg(va, double);
    return 0;
  }
  int main() {
    return foo(10, "", 3.14);
    return 0;
  }
  SRC
  define("HAVE_STDARG_PROTOTYPES")
end

have_library("event", "event_init", "event.h") || abort
have_library("couchbase", "libcouchbase_create", "libcouchbase/couchbase.h") || abort
create_header("couchbase_config.h")
create_makefile("couchbase_ext")