-

diet gcc -s -pipe -Os -o sln sln.c
sln.c:3:5: error: conflicting types for ‘strlen’
 int strlen(const char *s) {
     ^
In file included from /usr/include/diet/sys/select.h:4:0,
                 from /usr/include/diet/unistd.h:8,
                 from sln.c:1:
/usr/include/diet/string.h:28:8: note: previous declaration of ‘strlen’ was here
 size_t strlen(const char *s) __THROW __pure __nonnull((1));
        ^
sln.c: In function ‘die’:
sln.c:11:3: warning: implicit declaration of function ‘exit’ [-Wimplicit-function-declaration]
   exit(111);
   ^
sln.c:11:3: warning: incompatible implicit declaration of built-in function ‘exit’
sln.c:11:3: note: include ‘<stdlib.h>’ or provide a declaration of ‘exit’
sln.c: At top level:
sln.c:14:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
 main(int argc,char *argv[]) {
 ^
Makefile:2: recipe for target 'sln' failed
make: *** [sln] Error 1