Compile error of fsck.overlay on Fedora30

[Chengguang Xu <cgxu519@mykernel.net>]

Hi Zhangyi,

I found a compile error of fsck.overlay on my laptop(fedora 30), it looks like lacking of header in the check.c.
After manually added <sys/sysmacros.h> compile succeeded without error.

Detail info of compile error as below:

 [cgxu@localhost overlayfs-progs]$ make
gcc -Wall -g -c fsck.c
gcc -Wall -g -c common.c
gcc -Wall -g -c lib.c
gcc -Wall -g -c check.c
check.c: In function ‘ovl_create_whiteout’:
check.c:173:55: warning: implicit declaration of function ‘makedev’ [-Wimplicit-function-declaration]
  173 |  if (mknodat(dirfd, pathname, S_IFCHR | WHITEOUT_MOD, makedev(0, 0))) {
      |                                                       ^~~~~~~
gcc -Wall -g -c mount.c
gcc -Wall -g -c path.c
gcc -Wall -g -c overlayfs.c
gcc -lm fsck.o common.o lib.o check.o mount.o path.o overlayfs.o -o fsck.overlay
/usr/bin/ld: check.o: in function `ovl_create_whiteout':
/home/cgxu/git/overlayfs-progs/check.c:173: undefined reference to `makedev'
collect2: error: ld returned 1 exit status
make: *** [Makefile:10: overlay] Error 1


Thanks,
Chengguang