fatal error: 'bcls/bclslib.h' file not found

Hello, I've recently tried to compile the library. So I did, in order:

./configure
make

... But, I receive this error:

/Library/Developer/CommandLineTools/usr/bin/make all-recursive
Making all in src
if /bin/sh ../libtool --tag=CC --mode=compile gcc -DHAVE_CONFIG_H -I. -I. -I.. -I../include -O -std=c99 -MT bcls.lo -MD -MP -MF ".deps/bcls.Tpo" -c -o bcls.lo bcls.c; \
then mv -f ".deps/bcls.Tpo" ".deps/bcls.Plo"; else rm -f ".deps/bcls.Tpo"; exit 1; fi
gcc -DHAVE_CONFIG_H -I. -I. -I.. -I../include -O -std=c99 -MT bcls.lo -MD -MP -MF .deps/bcls.Tpo -c bcls.c -fno-common -DPIC -o .libs/bcls.o
In file included from bcls.c:31:
In file included from ./bcls.h:45:
./bctimer.h:35:10: fatal error: 'bcls/bclslib.h' file not found
#include "bcls/bclslib.h"
^
1 error generated.
make[2]: *** [bcls.lo] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2

I can't find the file 'bclslib.h' in your project, Please make sure it is in your path,Thanks.