from buildutils import *

Import('env', 'buildDir', 'buildTargets', 'installTargets', 'libraryTargets')
localenv = env.Clone()

def prep_default(env):
    return env.Clone()

def prep_f2c(env):
    localenv = env.Clone()

    localenv.Append(CPPPATH=Dir('#ext/f2c_libs'))
    if not localenv['HAS_TIMES_H']:
        localenv.Append(CPPDEFINES=['USE_CLOCK'])
    if not localenv['HAS_UNISTD_H']:
        localenv.Append(CPPDEFINES=['MSDOS'])

    # The F2C code generates a lot of warnings designed to catch
    # programmer errors, but since this is autogenerated code, those
    # warnings are irrelevant.
    if '-Wall' in localenv['CCFLAGS']:
        localenv['CCFLAGS'].remove('-Wall')
        localenv['CCFLAGS'].append('-Wno-format-security')

    return localenv

def prep_sundials(env):
    localenv = env.Clone()
    localenv.Append(CPPPATH=Dir('#ext/cvode/include'))

    # Suppress warnings from external code
    if '-Wall' in localenv['CCFLAGS']:
        localenv['CCFLAGS'].append('-Wno-format')

    return localenv

def prep_gtest(env):
    localenv = env.Clone()
    localenv.Append(CPPPATH=[Dir('#ext/gtest'),
                             Dir('#ext/gtest/include')],
                    CPPDEFINES={'GTEST_HAS_PTHREAD': 0})
    return localenv

# (subdir, (file extensions), prepfunction)
libs = []

if env['build_with_f2c']:
    libs.append(('f2c_math', ['cpp','c'], prep_f2c))

    # Create arith.h using the arithchk program
    if not os.path.exists('arith.h'):
        arithenv = prep_f2c(env)

        # TODO: make link flag more general
        arithenv.Append(CPPFLAGS='-DNO_FPINIT')
        arithenv.Program('f2c_libs/arithchk/arithchk', source='f2c_libs/arithchk/arithchk.c',
                         LIBS=env['LIBM'])
        arithenv.Command('#ext/f2c_libs/arith.h', 'f2c_libs/arithchk/arithchk$PROGSUFFIX',
                         '$SOURCE > $TARGET')

    headerenv = prep_f2c(env)
    # Possibly system-depenent headers
    headerenv.Command('#ext/f2c_libs/signal1.h', 'f2c_libs/signal1.h0',
                      Copy('$TARGET', '$SOURCE'))

    headerenv.Command('#ext/f2c_libs/sysdep1.h', 'f2c_libs/sysdep1.h0',
                      Copy('$TARGET', '$SOURCE'))

    libs.append(('f2c_libs', 'c', prep_f2c))

    if env['BUILD_BLAS_LAPACK']:
        libs.append(('f2c_blas', ['c'], prep_f2c))
        libs.append(('f2c_lapack', ['c'], prep_f2c))

else:
    libs.append(('math', ['cpp','c','f'], prep_default))

    if env['BUILD_BLAS_LAPACK']:
        libs.append(('blas', ['f'], prep_default))
        libs.append(('lapack', ['f'], prep_default))

if env['use_sundials'] == 'n':
    libs.append(('cvode/source', ['c'], prep_sundials))


for subdir, extensions, prepFunction in libs:
    localenv = prepFunction(env)
    objects = localenv.SharedObject(mglob(localenv, subdir, *extensions))
    libraryTargets.extend(objects)

# Google Teset
localenv = env.Clone()
localenv.Append(CPPPATH=[Dir('#ext/gtest'),
                         Dir('#ext/gtest/include')],
                CPPDEFINES={'GTEST_HAS_PTHREAD': 0})
lib = localenv.Library(pjoin('../lib', 'gtest'),
                       source=['gtest/src/gtest-all.cc'])
buildTargets.extend(lib)