g++ -o obj/so/test/charclass_test obj/so/re2/testing/charclass_test.o obj/so/util/pcre.o obj/so/util/random.o obj/so/util/thread.o obj/so/re2/testing/backtrack.o obj/so/re2/testing/dump.o obj/so/re2/testing/exhaustive_tester.o obj/so/re2/testing/null_walker.o obj/so/re2/testing/regexp_generator.o obj/so/re2/testing/string_generator.o obj/so/re2/testing/tester.o obj/so/util/test.o -Lobj/so -lre2 obj/libre2.a -pthread
g++: unrecognized option '-pthread'
/usr/lib/gcc/i686-pc-cygwin/4.5.3/../../../../i686-pc-cygwin/bin/ld: cannot find -lre2
collect2: ld returned 1 exit status
make: *** [obj/so/test/charclass_test] Error 1