Description:

gcc -DHAVE_CONFIG_H -I. -I. -I. -D_FORTIFY_SOURCE=2 -march=x86-64 -mtune=generic -O2 -pipe -fstack-protector --param=ssp-buffer-size=4 -Wall -Wno-comment -c cmatrix.c
cmatrix.c: In function 'handle_sigwinch':
cmatrix.c:214:20: error: storage size of 'win' isn't known
struct winsize win;
^
cmatrix.c:216:5: warning: implicit declaration of function 'ttyname' [-Wimplicit-function-declaration]
tty = ttyname(0);
^
cmatrix.c:216:9: warning: assignment makes pointer from integer without a cast [enabled by default]
tty = ttyname(0);
^
cmatrix.c:222:5: warning: implicit declaration of function 'ioctl' [-Wimplicit-function-declaration]
result = ioctl(fd, TIOCGWINSZ, &win);
^
cmatrix.c:222:24: error: 'TIOCGWINSZ' undeclared (first use in this function)
result = ioctl(fd, TIOCGWINSZ, &win);
^
cmatrix.c:222:24: note: each undeclared identifier is reported only once for each function it appears in
cmatrix.c:214:20: warning: unused variable 'win' [-Wunused-variable]
struct winsize win;
^
cmatrix.c: In function 'main':
cmatrix.c:257:5: error: 'opterr' undeclared (first use in this function)
opterr = 0;
^
cmatrix.c:258:5: warning: implicit declaration of function 'getopt' [-Wimplicit-function-declaration]
while ((optchr = getopt(argc, argv, "abBfhlnosxVu:C:")) != EOF) {
^
cmatrix.c:275:22: error: 'optarg' undeclared (first use in this function)
if (!strcasecmp(optarg, "green"))
^
cmatrix.c:633:11: warning: ignoring return value of 'system', declared with attribute warn_unused_result [-Wunused-result]
system(syscmd);
^
Makefile:186: recipe for target 'cmatrix.o' failed
make: *** [cmatrix.o] Error 1
==> ERROR: A failure occurred in build().

Steps to reproduce:
sudo extra-x86_64-build