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# Copyright 2010 Cloudant
# 
# 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.
import os
import commands

def require_lib(name):
    if not conf.CheckLib(name):
        print 'Could not find required library', name
        Exit(1)

def runcmd(cmd):
    return commands.getstatusoutput(cmd)

env = Environment(CC="c++", CCFLAGS='-g -O2 -DXP_UNIX',
                        CPPPATH=os.getenv("CPPPATH"))

if os.uname()[0] == 'SunOS':
   env['CC'] = '/usr/sfw/bin/gcc'
   env['CCFLAGS'] += ' -I/opt/local/include'
   env.Append(LINKFLAGS=['-L/opt/local/lib'])

if os.uname()[0] == 'FreeBSD':
	env['CCFLAGS'] += ' -I/usr/local/include'
	env.Append(LINKFLAGS=['-L/usr/local/lib'])
	env['LIB_DL'] = env['LIB_RT'] = ''
	env['LIB_COMPAT'] = 'compat'

if os.path.exists('/usr/bin/pkg-config'):
    for pkg in ["mozilla-js-185", "mozilla-js"]:
        (s1, output) = runcmd("/usr/bin/pkg-config %s --cflags" % pkg)
        if s1 == 0:
            env.Append(CCFLAGS=" " + output)
        (s2, output) = runcmd("/usr/bin/pkg-config %s --libs-only-L" % pkg)
        if s2 == 0:
            env.Append(LINKFLAGS=output)
        if s1 == 0 or s2 == 0:
            break

if not env.GetOption('clean'):
    conf = Configure(env, config_h='config.h')

    require_lib('m')
    require_lib('pthread')
    require_lib('nspr4')

    ## check for SpiderMonkey development header
    if conf.CheckHeader('mozjs/jsapi.h'):
        jsapi = 'mozjs/jsapi.h'
    elif conf.CheckHeader('js/jsapi.h'):
        jsapi = 'js/jsapi.h'
    elif conf.CheckHeader('jsapi.h'):
        jsapi = 'jsapi.h'
    else:
        print 'Could not find jsapi.h.', \
            'Are Mozilla SpiderMonkey headers installed?'
        Exit(1)

    ## check for SpiderMonkey library as libjs or libmozjs
    if not conf.CheckLibWithHeader('mozjs185-1.0', jsapi, 'c', autoadd=1):
        if not conf.CheckLibWithHeader('mozjs', jsapi, 'c', autoadd=1):
            if not conf.CheckLibWithHeader('js', jsapi, 'c', autoadd=1):
                if not conf.CheckLibWithHeader('mozjs185', jsapi, 'c', autoadd=1):
                    print 'Could not find JS library.', \
                        'Is Mozilla SpiderMonkey installed?'
                    Exit(1)

    ## Detect the version of SpiderMonkey we're using
    jsheader = "#include <%s>" % jsapi
    versions = [
        ("JS_NewCompartmentAndGlobalObject", "SM185"),
        ("JS_ThrowStopIteration", "SM180"),
        ("JS_GetStringCharsAndLength", "SM170")
    ]
    for func, vsn in versions:
        if conf.CheckDeclaration(func, jsheader):
            conf.Define(vsn)
            break

    ## Find the proper type for JS script objects

    if conf.CheckType("JSScript*", '#include "%s"' % jsapi):
        conf.Define("JSSCRIPT_TYPE", "JSScript*")
    else:
        conf.Define("JSSCRIPT_TYPE", "JSObject*")

    ## Check if curl is available
    try:
        vsn = runcmd("curl-config --version")[1]
        vsn = vsn.split()[-1].strip().split(".")
        vsn = tuple(map(int, vsn))
        if vsn > (7, 18, 0):
            require_lib('curl')
    except:
        pass

    ## Define properties for -h / -V

    (_, vsn) = runcmd("git describe --match 1.*")
    conf.Define("PACKAGE_STRING", '"%s"' % vsn.rstrip())
    conf.Define("PACKAGE_NAME", '"Cloudant BigCouch"')
    conf.Define("PACKAGE_BUGREPORT", '"https://github.com/cloudant/bigcouch/issues"')

    env = conf.Finish()

env.Program('couchjs', ['main.c', 'http.c', 'utf8.c', 'util.c'])