$ make
cc --std=c89 -pedantic -Wall -Wextra -Wno-unused-parameter -I/cygdrive/e/Dropbox/Documents/c-steam/libuv/include -I/cygdrive/e/Dropbox/Documents/c-steam/libuv/include/uv-private -I/cygdrive/e/Dropbox/Documents/c-steam/libuv/src -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -g -c src/unix/async.c -o src/unix/async.o
In file included from /cygdrive/e/Dropbox/Documents/c-steam/libuv/include/uv.h:67,
                 from src/unix/async.c:25:
/cygdrive/e/Dropbox/Documents/c-steam/libuv/include/uv-private/uv-unix.h:148: error: parse error before "uv_barrier_t"
/cygdrive/e/Dropbox/Documents/c-steam/libuv/include/uv-private/uv-unix.h:148: warning: type defaults to `int' in declaration of `uv_barrier_t'
/cygdrive/e/Dropbox/Documents/c-steam/libuv/include/uv-private/uv-unix.h:148: error: ISO C forbids data definition with no type or storage class
In file included from src/unix/async.c:25:
/cygdrive/e/Dropbox/Documents/c-steam/libuv/include/uv.h:1890: error: parse error before '*' token
/cygdrive/e/Dropbox/Documents/c-steam/libuv/include/uv.h:1891: error: parse error before '*' token
/cygdrive/e/Dropbox/Documents/c-steam/libuv/include/uv.h:1892: error: parse error before '*' token
/cygdrive/e/Dropbox/Documents/c-steam/libuv/config-unix.mk:152: recipe for target `src/unix/async.o' failed
make: *** [src/unix/async.o] Error 1