diff --git a/libc/include/stdlib.h b/libc/include/stdlib.h
index 13c9d37..4182f2d 100644
--- a/libc/include/stdlib.h
+++ b/libc/include/stdlib.h
@@ -42,115 +42,114 @@
 #define EXIT_SUCCESS 0
 
 __noreturn void abort(void);
-__noreturn void exit(int);
-__noreturn void _Exit(int) __INTRODUCED_IN(21);
-int atexit(void (*)(void));
+__noreturn void exit(int __status);
+__noreturn void _Exit(int __status) __INTRODUCED_IN(21);
+int atexit(void (*__fn)(void));
 
-int at_quick_exit(void (*)(void)) __INTRODUCED_IN(21);
-void quick_exit(int) __noreturn __INTRODUCED_IN(21);
+int at_quick_exit(void (*__fn)(void)) __INTRODUCED_IN(21);
+void quick_exit(int __status) __noreturn __INTRODUCED_IN(21);
 
-char* getenv(const char*);
-int putenv(char*);
-int setenv(const char*, const char*, int);
-int unsetenv(const char*);
+char* getenv(const char* __name);
+int putenv(char* __assignment);
+int setenv(const char* __name, const char* __value, int __overwrite);
+int unsetenv(const char* __name);
 int clearenv(void);
 
-char* mkdtemp(char*);
-char* mktemp(char*) __attribute__((deprecated("mktemp is unsafe, use mkstemp or tmpfile instead")));
+char* mkdtemp(char* __template);
+char* mktemp(char* __template) __attribute__((deprecated("mktemp is unsafe, use mkstemp or tmpfile instead")));
 
-int mkostemp64(char*, int) __INTRODUCED_IN(23);
-int mkostemp(char*, int) __INTRODUCED_IN(23);
-int mkostemps64(char*, int, int) __INTRODUCED_IN(23);
-int mkostemps(char*, int, int) __INTRODUCED_IN(23);
-int mkstemp64(char*) __INTRODUCED_IN(21);
-int mkstemp(char*);
-int mkstemps64(char*, int) __INTRODUCED_IN(23);
-int mkstemps(char*, int);
+int mkostemp64(char* __template, int __flags) __INTRODUCED_IN(23);
+int mkostemp(char* __template, int __flags) __INTRODUCED_IN(23);
+int mkostemps64(char* __template, int __suffix_length, int __flags) __INTRODUCED_IN(23);
+int mkostemps(char* __template, int __suffix_length, int __flags) __INTRODUCED_IN(23);
+int mkstemp64(char* __template) __INTRODUCED_IN(21);
+int mkstemp(char* __template);
+int mkstemps64(char* __template, int __flags) __INTRODUCED_IN(23);
+int mkstemps(char* __template, int __flags);
 
-long strtol(const char *, char **, int);
-long long strtoll(const char *, char **, int);
-unsigned long strtoul(const char *, char **, int);
-unsigned long long strtoull(const char *, char **, int);
+long strtol(const char* __s, char** __end_ptr, int __base);
+long long strtoll(const char* __s, char** __end_ptr, int __base);
+unsigned long strtoul(const char* __s, char** __end_ptr, int __base);
+unsigned long long strtoull(const char* __s, char** __end_ptr, int __base);
 
-int posix_memalign(void** memptr, size_t alignment, size_t size) __INTRODUCED_IN(16);
+int posix_memalign(void** __memptr, size_t __alignment, size_t __size) __INTRODUCED_IN(16);
 
-double strtod(const char*, char**);
-long double strtold(const char*, char**) __INTRODUCED_IN(21);
+double strtod(const char* __s, char** __end_ptr);
+long double strtold(const char* __s, char** __end_ptr) __INTRODUCED_IN(21);
 
-unsigned long strtoul_l(const char*, char**, int, locale_t) __INTRODUCED_IN(26);
+unsigned long strtoul_l(const char* __s, char** __end_ptr, int __base, locale_t __l) __INTRODUCED_IN(26);
 
-int atoi(const char*) __attribute_pure__;
-long atol(const char*) __attribute_pure__;
-long long atoll(const char*) __attribute_pure__;
+int atoi(const char* __s) __attribute_pure__;
+long atol(const char* __s) __attribute_pure__;
+long long atoll(const char* __s) __attribute_pure__;
 
-char* realpath(const char* path, char* resolved);
-int system(const char *string);
+char* realpath(const char* __path, char* __resolved);
+int system(const char* __command);
 
-void* bsearch(const void* key, const void* base0, size_t nmemb, size_t size,
-              int (*compar)(const void*, const void*));
+void* bsearch(const void* __key, const void* __base, size_t __nmemb, size_t __size, int (*__comparator)(const void* __lhs, const void* __rhs));
 
-void qsort(void*, size_t, size_t, int (*)(const void*, const void*));
+void qsort(void* __base, size_t __nmemb, size_t __size, int (*__comparator)(const void* __lhs, const void* __rhs));
 
 uint32_t arc4random(void);
-uint32_t arc4random_uniform(uint32_t);
-void arc4random_buf(void*, size_t);
+uint32_t arc4random_uniform(uint32_t __upper_bound);
+void arc4random_buf(void* __buf, size_t __n);
 
 #define RAND_MAX 0x7fffffff
 
-int rand_r(unsigned int*) __INTRODUCED_IN(21);
+int rand_r(unsigned int* __seed_ptr) __INTRODUCED_IN(21);
 
 double drand48(void);
-double erand48(unsigned short[3]);
-long jrand48(unsigned short[3]);
-void lcong48(unsigned short[7]) __INTRODUCED_IN(23);
+double erand48(unsigned short __xsubi[3]);
+long jrand48(unsigned short __xsubi[3]);
+void lcong48(unsigned short __param[7]) __INTRODUCED_IN(23);
 long lrand48(void);
 long mrand48(void);
-long nrand48(unsigned short[3]);
-unsigned short* seed48(unsigned short[3]);
-void srand48(long);
+long nrand48(unsigned short __xsubi[3]);
+unsigned short* seed48(unsigned short __seed16v[3]);
+void srand48(long __seed);
 
-char* initstate(unsigned int, char*, size_t) __INTRODUCED_IN(21);
-char* setstate(char*) __INTRODUCED_IN(21);
+char* initstate(unsigned int __seed, char* __state, size_t __n) __INTRODUCED_IN(21);
+char* setstate(char* __state) __INTRODUCED_IN(21);
 
 int getpt(void);
-int posix_openpt(int) __INTRODUCED_IN(21);
-char* ptsname(int);
-int ptsname_r(int, char*, size_t);
-int unlockpt(int);
+int posix_openpt(int __flags) __INTRODUCED_IN(21);
+char* ptsname(int __fd);
+int ptsname_r(int __fd, char* __buf, size_t __n);
+int unlockpt(int __fd);
 
-int getsubopt(char**, char* const*, char**) __INTRODUCED_IN(26);
+int getsubopt(char** __option, char* const* __tokens, char** __value_ptr) __INTRODUCED_IN(26);
 
 typedef struct {
-    int  quot;
-    int  rem;
+  int quot;
+  int rem;
 } div_t;
 
-div_t div(int, int) __attribute_const__;
+div_t div(int __numerator, int __denominator) __attribute_const__;
 
 typedef struct {
-    long int  quot;
-    long int  rem;
+  long int quot;
+  long int rem;
 } ldiv_t;
 
-ldiv_t ldiv(long, long) __attribute_const__;
+ldiv_t ldiv(long __numerator, long __denominator) __attribute_const__;
 
 typedef struct {
-    long long int  quot;
-    long long int  rem;
+  long long int quot;
+  long long int rem;
 } lldiv_t;
 
-lldiv_t lldiv(long long, long long) __attribute_const__;
+lldiv_t lldiv(long long __numerator, long long __denominator) __attribute_const__;
 
 /* BSD compatibility. */
 const char* getprogname(void) __INTRODUCED_IN(21);
-void setprogname(const char*) __INTRODUCED_IN(21);
+void setprogname(const char* __name) __INTRODUCED_IN(21);
 
-int mblen(const char*, size_t) __INTRODUCED_IN(26) __VERSIONER_NO_GUARD;
-size_t mbstowcs(wchar_t*, const char*, size_t);
-int mbtowc(wchar_t*, const char*, size_t) __INTRODUCED_IN(21) __VERSIONER_NO_GUARD;
-int wctomb(char*, wchar_t) __INTRODUCED_IN(21) __VERSIONER_NO_GUARD;
+int mblen(const char* __s, size_t __n) __INTRODUCED_IN(26) __VERSIONER_NO_GUARD;
+size_t mbstowcs(wchar_t* __dst, const char* __src, size_t __n);
+int mbtowc(wchar_t* __wc_ptr, const char* __s, size_t __n) __INTRODUCED_IN(21) __VERSIONER_NO_GUARD;
+int wctomb(char* __dst, wchar_t __wc) __INTRODUCED_IN(21) __VERSIONER_NO_GUARD;
 
-size_t wcstombs(char*, const wchar_t*, size_t);
+size_t wcstombs(char* __dst, const wchar_t* __src, size_t __n);
 
 #if __ANDROID_API__ >= __ANDROID_API_L__
 size_t __ctype_get_mb_cur_max(void) __INTRODUCED_IN(21);
@@ -169,28 +168,28 @@
 #endif
 
 #if __ANDROID_API__ >= __ANDROID_API_L__
-float strtof(const char*, char**) __INTRODUCED_IN(21);
-double atof(const char*) __attribute_pure__ __INTRODUCED_IN(21);
-int abs(int) __attribute_const__ __INTRODUCED_IN(21);
-long labs(long) __attribute_const__ __INTRODUCED_IN(21);
-long long llabs(long long) __attribute_const__ __INTRODUCED_IN(21);
+float strtof(const char* __s, char** __end_ptr) __INTRODUCED_IN(21);
+double atof(const char* __s) __attribute_pure__ __INTRODUCED_IN(21);
+int abs(int __x) __attribute_const__ __INTRODUCED_IN(21);
+long labs(long __x) __attribute_const__ __INTRODUCED_IN(21);
+long long llabs(long long __x) __attribute_const__ __INTRODUCED_IN(21);
 int rand(void) __INTRODUCED_IN(21);
-void srand(unsigned int) __INTRODUCED_IN(21);
+void srand(unsigned int __seed) __INTRODUCED_IN(21);
 long random(void) __INTRODUCED_IN(21);
-void srandom(unsigned int) __INTRODUCED_IN(21);
-int grantpt(int) __INTRODUCED_IN(21);
+void srandom(unsigned int __seed) __INTRODUCED_IN(21);
+int grantpt(int __fd) __INTRODUCED_IN(21);
 
-long long strtoll_l(const char*, char**, int, locale_t) __INTRODUCED_IN(21);
-unsigned long long strtoull_l(const char*, char**, int, locale_t) __INTRODUCED_IN(21);
-long double strtold_l(const char*, char**, locale_t) __INTRODUCED_IN(21);
+long long strtoll_l(const char* __s, char** __end_ptr, int __base, locale_t __l) __INTRODUCED_IN(21);
+unsigned long long strtoull_l(const char* __s, char** __end_ptr, int __base, locale_t __l) __INTRODUCED_IN(21);
+long double strtold_l(const char* __s, char** __end_ptr, locale_t __l) __INTRODUCED_IN(21);
 #else
 // Implemented as static inlines before 21.
 #endif
 
 #if __ANDROID_API__ >= __ANDROID_API_O__
-double strtod_l(const char*, char**, locale_t) __INTRODUCED_IN(26);
-float strtof_l(const char*, char**, locale_t) __INTRODUCED_IN(26);
-long strtol_l(const char*, char**, int, locale_t) __INTRODUCED_IN(26);
+double strtod_l(const char* __s, char** __end_ptr, locale_t __l) __INTRODUCED_IN(26);
+float strtof_l(const char* __s, char** __end_ptr, locale_t __l) __INTRODUCED_IN(26);
+long strtol_l(const char* __s, char** __end_ptr, int, locale_t __l) __INTRODUCED_IN(26);
 #else
 // Implemented as static inlines before 26.
 #endif