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 -c ftp.c
In file included from ftp.c:3:0:
./config.h:8:15: error: two or more data types in declaration specifiers
#define off_t long
^
./config.h:17:17: error: two or more data types in declaration specifiers
#define ssize_t long
^
./config.h:16:19: error: two or more data types in declaration specifiers
#define socklen_t int
^
ftp.c: In function 'send_control':
ftp.c:71:26: error: expected expression before 'char'
s = va_arg(args, char *);
^
ftp.c:76:34: error: expected expression before 'char'
s = va_arg(args, char *);
^
ftp.c: In function 'close_quit':
ftp.c:35:22: warning: ignoring return value of 'write', declared with attribute warn_unused_result [-Wunused-result]
write(sock, "QUIT\r\n", 6);
^
ftp.c: In function 'send_control':
ftp.c:80:14: warning: ignoring return value of 'write', declared with attribute warn_unused_result [-Wunused-result]
write(sock, line, strlen(line));
^
Makefile:192: recipe for target 'ftp.o' failed
make: *** [ftp.o] Error 1
==> ERROR: A failure occurred in build().
Aborting...


Steps to reproduce:
sudo extra-x86_64-build