#-*-python-*-
# ROOT configuration for SCons

from distutils.version import LooseVersion
import os.path
import subprocess
from buildhelp import ROOTARCH, RATROOT, ROOTSYS

#### Builder: RootDict(dictionary_name, [list of header files])
#
# Produces a ROOT dictionary for the header files listed.  Include
# LinkDef.h at the end if needed to control dictionary generation

def generate_action(source, target, env, for_signature):
    'Generates rootcint call to output ROOT dictionary for source.'
    # Strip off leading include/
    sources = [str(s).replace('include/','') for s in source]

    return os.path.join(ROOTSYS, 'rootcint') + ' -f ' + str(target[0]) \
           + ' -c -p $_CPPINCFLAGS $_CCFLAGS $_CPPDEFFLAGS ' + ' '.join(sources)
    
rootdict = Builder(generator = generate_action,
                   src_suffix = '.hh')
####


# Obtain ROOT build flags
rootenv = Environment()  # Temporary SCons object to parse root-config output
rootenv.ParseConfig(os.path.join(ROOTSYS, 'root-config') + " --cflags --ldflags --libs")

root_version = LooseVersion(subprocess.Popen(["root-config", "--version"], stdout=subprocess.PIPE).communicate()[0].rstrip())
root_target_min = LooseVersion("5.34")
root_target_max = LooseVersion("6")
if not root_target_min <= root_version < root_target_max:
    print "Warning: Wrong ROOT version used,", root_version, "it should be", "%s/*" % root_target_min

# Put it into form that can be easily merged into main environment
rootopts = { 'BUILDERS'      : {'RootDict' : rootdict} }
for key in ['ASFLAGS','CCFLAGS','CPPPATH','LIBPATH','LIBS',
            'LINKFLAGS']:
    rootopts[key] = rootenv[key]
if rootenv.has_key('CPPDEFINES'):
	rootopts['CPPDEFINES'] = rootenv['CPPDEFINES']

rootopts['LIBS'].append('-lMinuit2')
rootopts['LIBS'].append('-lFFTW')      # fast Fourier transform library
rootopts['LIBS'].append('-lSpectrum')
rootopts['LIBS'].append('-lPyROOT')
rootopts['LIBS'].append('-lMathCore')
rootopts['LIBS'].append('-lMathMore')

# ROOT headers use long long as 64 bit data type, which g++ complains
# is C99 but not ISO C++ data type.  Need this flag to get things to
# compile
if ROOTARCH.find("gcc") >= 0:
    rootopts['CCFLAGS'].append('-Wno-long-long')

if root_version >= LooseVersion("6"):
    rootopts['USE_ROOT6'] = True
    # Need to use c++11
    rootopts['CXXFLAGS'] = '-std=c++11'
else:
    rootopts['USE_ROOT6'] = False

# Returns a dictionary when you import this file using:
# rootopts = SConscript('config/ROOT.scons')
#
# Merge into your build environment with:
# env.Append(rootopts)
Return("rootopts")