error in wavefile.cpp cannot install

[MarkHyphen]

Hey. Hope you can help me out. Would love to use this package as it seems to be what I need. After going into the libxtract-master local directory, i type make install and then I get:

make[1]: Entering directory '/home/nazgul/Programs/LibXtract-master/src'
make[1]: Leaving directory '/home/nazgul/Programs/LibXtract-master/src'
make[1]: Entering directory '/home/nazgul/Programs/LibXtract-master/examples'
make[2]: Entering directory '/home/nazgul/Programs/LibXtract-master/examples/simpletest'
WaveFile.cpp:75:8: warning: multi-character character constant [-Wmultichar]
case 'FFIR':
^
WaveFile.cpp:81:31: warning: multi-character character constant [-Wmultichar]
if (header.riff.format != 'EVAW')
^
WaveFile.cpp:89:8: warning: multi-character character constant [-Wmultichar]
case ' tmf':
^
WaveFile.cpp:124:8: warning: multi-character character constant [-Wmultichar]
case 'atad':
^
WaveFile.cpp:143:29: warning: multi-character character constant [-Wmultichar]
if (header.riff.chunkID != 'FFIR')
^
WaveFile.cpp:148:28: warning: multi-character character constant [-Wmultichar]
if (header.fmt.chunkID != ' tmf')
^
make[2]: Leaving directory '/home/nazgul/Programs/LibXtract-master/examples/simpletest'
make[1]: Leaving directory '/home/nazgul/Programs/LibXtract-master/examples'

I go to my usr/local directory and the package did not install. Thanks for any help you can provide!