src/stdlib/div.c: In function ‘div’:
src/stdlib/div.c:10:10: error: ‘r’ is used uninitialized in this function [-Werror=uninitialized]
   return r;
          ^
cc1: all warnings being treated as errors

int sys_halt(void)
{
  // Hack: Hard coded ACPI shutdown for qemu/bochs
  outw(0xB004, 0x0 | 0x2000);
  return 0;
}

#ifdef __cplusplus
#define NULL 0L
#else
#define NULL ((void*)0)
#endif /* __cplusplus */

$ grep -hr 'assert(0' distrib/ulibc/ -B2 | grep -v assert | grep -v { | grep -v '\-\-'
void (*signal(int sig, void (*func)(int)))(int)
int raise(int sig)
double atof(const char* nptr)
int atoi(const char* nptr)
long int atol(const char* nptr)
double strtod(const char* nptr, char** endptr)
long int strtol(const char* nptr, char** endptr, int base)
unsigned long int strtoul(const char* nptr, char** endptr, int base)
int rand(void)
void srand(unsigned int seed)
void* calloc(size_t nmemb, size_t size)
void free(void* ptr)
void* malloc(size_t size)
void* realloc(void* ptr, size_t size)
void abort(void)
int atexit(void (*func)(void))
void exit(int status)
char* getenv(const char* name)
int system(const char* string)
void* bsearch(const void* key, const void* base, size_t nmemb, size_t size, int (*compar)(const void*, const void*))
void qsort(void* base, size_t nmemb, size_t size, int (*compar)(const void*, const void*))
int abs(int j)
div_t div(int numer, int denom)
long int labs(long int j)
ldiv_t ldiv(long int numer, long int denom)
int mblen(const char* s, size_t n)
int mbtowc(wchar_t* pwc, const char* s, size_t n)
int wctomb(char* s, wchar_t wchar)
size_t mbstowcs(wchar_t* pwcs, const char* s, size_t n)
size_t wcstombs(char* s, const wchar_t* pwcs, size_t n)
clock_t clock(void)
double difftime(time_t time1, time_t time0)
time_t mktime(struct tm* timeptr)
time_t time(time_t* timer)
char* asctime(const struct tm* timeptr)
char* ctime(const time_t* timer)
struct tm* gmtime(const time_t* timer)
struct tm* localtime(const time_t* timer)
size_t strftime(char* s, size_t maxsize, const char* format, const struct tm* timeptr)
void *memcpy(void *s1, const void *s2, size_t n)
void *memmove(void *s1, const void *s2, size_t n)
char *strcpy(char *s1, const char *s2)
char *strncpy(char *s1, const char *s2, size_t n)
char *strcat(char *s1, const char *s2)
char *strncat(char *s1, const char *s2, size_t n)
int memcmp(const void *s1, const void *s2, size_t n)
int strcmp(const char *s1, const char *s2)
int strcoll(const char *s1, const char *s2)
int strncmp(const char *s1, const char *s2, size_t n)
size_t strxfrm(char *s1, const char *s2, size_t n)
void *memchr(const void *s, int c, size_t n)
char *strchr(const char *s, int c)
size_t strcspn(const char *s1, const char *s2)
char *strpbrk(const char *s1, const char *s2)
char *strrchr(const char *s, int c)
size_t strspn(const char *s1, const char *s2)
char *strstr(const char *s1, const char *s2)
char *strtok(char *s1, const char *s2)
void *memset(void *s, int c, size_t n)
char *strerror(int errnum)
size_t strlen(const char *s)
int remove(const char* filename)
int rename(const char* src, const char* dst)
FILE* tmpfile(void)
char* tmpnam(char* s)
int fclose(FILE* stream)
int fflush(FILE* stream)
FILE* fopen(const char* filename, const char* mode)
FILE* freopen(const char* filename, const char* mode, FILE* stream)
void setbuf(FILE* stream, char* buf)
int setvbuf(FILE* stream, char* buf, int mode, size_t size)
int fprintf(FILE* stream, const char* format, ...)
int fscanf(FILE* stream, const char* format, ...)
int printf(const char* format, ...)
int scanf(const char* format, ...)
int sprintf(char* s, const char* format, ...)
int sscanf(const char* s, const char* format, ...)
int vfprintf(FILE* stream, const char* format, va_list arg)
int vprintf(const char* format, va_list arg)
int vsprintf(char* s, const char* format, va_list arg)
int fgetc(FILE* stream)
char* fgets(char* s, int n, FILE* stream)
int fputc(int c, FILE* stream)
int fputs(const char* s, FILE* stream)
int getc(FILE* stream)
int getchar(void)
char* gets(char* s)
int putc(int c, FILE* stream)
int putchar(int c)
int puts(const char* s)
int ungetc(int c, FILE* stream)
size_t fread(void* ptr, size_t size, size_t nmemb, FILE* stream)
size_t fwrite(const void* ptr, size_t size, size_t nmemb, FILE* stream)
int fgetpos(FILE* stream,fpos_t* pos)
int fseek(FILE* stream, long int offset, int whence)
int fsetpos(FILE* stream, const fpos_t* pos)
long int ftell(FILE* stream)
void rewind(FILE* stream)
void clearerr(FILE* stream)
int feof(FILE* stream)
int ferror(FILE* stream)
void perror(const char* s)
double acos(double x)
double asin(double x)
double atan(double x)
double atan2(double x, double y)
double cos(double x)
double sin(double x)
double tan(double x)
double cosh(double x)
double sinh(double x)
double tanh(double x)
double exp(double x)
double frexp(double value, int* exp)
double ldexp(double x, int exp)
double log(double x)
double log10(double x)
double modf(double value, double* iptr)
double pow(double x, double y)
double sqrt(double x)
double ceil(double x)
double fabs(double x)
double floot(double x)
double fmod(double x, double y)

$ !! | wc -l
grep -hr 'assert(0' distrib/ulibc/ -B2 | grep -v assert | grep -v { | grep -v '\-\-'  | wc -l
124