diff --git a/libc/include/complex.h b/libc/include/complex.h
index c020e4f..79fe07c 100644
--- a/libc/include/complex.h
+++ b/libc/include/complex.h
@@ -59,102 +59,102 @@
 
 /* 7.3.5 Trigonometric functions */
 /* 7.3.5.1 The cacos functions */
-double complex cacos(double complex) __INTRODUCED_IN(23);
-float complex cacosf(float complex) __INTRODUCED_IN(23);
-long double complex cacosl(long double complex) __INTRODUCED_IN(26);
+double complex cacos(double complex __z) __INTRODUCED_IN(23);
+float complex cacosf(float complex __z) __INTRODUCED_IN(23);
+long double complex cacosl(long double complex __z) __INTRODUCED_IN(26);
 /* 7.3.5.2 The casin functions */
-double complex casin(double complex) __INTRODUCED_IN(23);
-float complex casinf(float complex) __INTRODUCED_IN(23);
-long double complex casinl(long double complex) __INTRODUCED_IN(26);
+double complex casin(double complex __z) __INTRODUCED_IN(23);
+float complex casinf(float complex __z) __INTRODUCED_IN(23);
+long double complex casinl(long double complex __z) __INTRODUCED_IN(26);
 /* 7.3.5.1 The catan functions */
-double complex catan(double complex) __INTRODUCED_IN(23);
-float complex catanf(float complex) __INTRODUCED_IN(23);
-long double complex catanl(long double complex) __INTRODUCED_IN(26);
+double complex catan(double complex __z) __INTRODUCED_IN(23);
+float complex catanf(float complex __z) __INTRODUCED_IN(23);
+long double complex catanl(long double complex __z) __INTRODUCED_IN(26);
 /* 7.3.5.1 The ccos functions */
-double complex ccos(double complex) __INTRODUCED_IN(23);
-float complex ccosf(float complex) __INTRODUCED_IN(23);
-long double complex ccosl(long double complex) __INTRODUCED_IN(26);
+double complex ccos(double complex __z) __INTRODUCED_IN(23);
+float complex ccosf(float complex __z) __INTRODUCED_IN(23);
+long double complex ccosl(long double complex __z) __INTRODUCED_IN(26);
 /* 7.3.5.1 The csin functions */
-double complex csin(double complex) __INTRODUCED_IN(23);
-float complex csinf(float complex) __INTRODUCED_IN(23);
-long double complex csinl(long double complex) __INTRODUCED_IN(26);
+double complex csin(double complex __z) __INTRODUCED_IN(23);
+float complex csinf(float complex __z) __INTRODUCED_IN(23);
+long double complex csinl(long double complex __z) __INTRODUCED_IN(26);
 /* 7.3.5.1 The ctan functions */
-double complex ctan(double complex) __INTRODUCED_IN(23);
-float complex ctanf(float complex) __INTRODUCED_IN(23);
-long double complex ctanl(long double complex) __INTRODUCED_IN(26);
+double complex ctan(double complex __z) __INTRODUCED_IN(23);
+float complex ctanf(float complex __z) __INTRODUCED_IN(23);
+long double complex ctanl(long double complex __z) __INTRODUCED_IN(26);
 
 /* 7.3.6 Hyperbolic functions */
 /* 7.3.6.1 The cacosh functions */
-double complex cacosh(double complex) __INTRODUCED_IN(23);
-float complex cacoshf(float complex) __INTRODUCED_IN(23);
-long double complex cacoshl(long double complex) __INTRODUCED_IN(26);
+double complex cacosh(double complex __z) __INTRODUCED_IN(23);
+float complex cacoshf(float complex __z) __INTRODUCED_IN(23);
+long double complex cacoshl(long double complex __z) __INTRODUCED_IN(26);
 /* 7.3.6.2 The casinh functions */
-double complex casinh(double complex) __INTRODUCED_IN(23);
-float complex casinhf(float complex) __INTRODUCED_IN(23);
-long double complex casinhl(long double complex) __INTRODUCED_IN(26);
+double complex casinh(double complex __z) __INTRODUCED_IN(23);
+float complex casinhf(float complex __z) __INTRODUCED_IN(23);
+long double complex casinhl(long double complex __z) __INTRODUCED_IN(26);
 /* 7.3.6.3 The catanh functions */
-double complex catanh(double complex) __INTRODUCED_IN(23);
-float complex catanhf(float complex) __INTRODUCED_IN(23);
-long double complex catanhl(long double complex) __INTRODUCED_IN(26);
+double complex catanh(double complex __z) __INTRODUCED_IN(23);
+float complex catanhf(float complex __z) __INTRODUCED_IN(23);
+long double complex catanhl(long double complex __z) __INTRODUCED_IN(26);
 /* 7.3.6.4 The ccosh functions */
-double complex ccosh(double complex) __INTRODUCED_IN(23);
-float complex ccoshf(float complex) __INTRODUCED_IN(23);
-long double complex ccoshl(long double complex) __INTRODUCED_IN(26);
+double complex ccosh(double complex __z) __INTRODUCED_IN(23);
+float complex ccoshf(float complex __z) __INTRODUCED_IN(23);
+long double complex ccoshl(long double complex __z) __INTRODUCED_IN(26);
 /* 7.3.6.5 The csinh functions */
-double complex csinh(double complex) __INTRODUCED_IN(23);
-float complex csinhf(float complex) __INTRODUCED_IN(23);
-long double complex csinhl(long double complex) __INTRODUCED_IN(26);
+double complex csinh(double complex __z) __INTRODUCED_IN(23);
+float complex csinhf(float complex __z) __INTRODUCED_IN(23);
+long double complex csinhl(long double complex __z) __INTRODUCED_IN(26);
 /* 7.3.6.6 The ctanh functions */
-double complex ctanh(double complex) __INTRODUCED_IN(23);
-float complex ctanhf(float complex) __INTRODUCED_IN(23);
-long double complex ctanhl(long double complex) __INTRODUCED_IN(26);
+double complex ctanh(double complex __z) __INTRODUCED_IN(23);
+float complex ctanhf(float complex __z) __INTRODUCED_IN(23);
+long double complex ctanhl(long double complex __z) __INTRODUCED_IN(26);
 
 /* 7.3.7 Exponential and logarithmic functions */
 /* 7.3.7.1 The cexp functions */
-double complex cexp(double complex) __INTRODUCED_IN(23);
-float complex cexpf(float complex) __INTRODUCED_IN(23);
-long double complex cexpl(long double complex) __INTRODUCED_IN(26);
+double complex cexp(double complex __z) __INTRODUCED_IN(23);
+float complex cexpf(float complex __z) __INTRODUCED_IN(23);
+long double complex cexpl(long double complex __z) __INTRODUCED_IN(26);
 /* 7.3.7.2 The clog functions */
-double complex clog(double complex) __INTRODUCED_IN(26);
-float complex clogf(float complex) __INTRODUCED_IN(26);
-long double complex clogl(long double complex) __INTRODUCED_IN(26);
+double complex clog(double complex __z) __INTRODUCED_IN(26);
+float complex clogf(float complex __z) __INTRODUCED_IN(26);
+long double complex clogl(long double complex __z) __INTRODUCED_IN(26);
 
 /* 7.3.8 Power and absolute-value functions */
 /* 7.3.8.1 The cabs functions */
-double cabs(double complex) __INTRODUCED_IN(23);
-float cabsf(float complex) __INTRODUCED_IN(23);
-long double cabsl(long double complex) __INTRODUCED_IN_32(21) __INTRODUCED_IN_64(23);
+double cabs(double complex __z) __INTRODUCED_IN(23);
+float cabsf(float complex __z) __INTRODUCED_IN(23);
+long double cabsl(long double complex __z) __INTRODUCED_IN_32(21) __INTRODUCED_IN_64(23);
 /* 7.3.8.2 The cpow functions */
-double complex cpow(double complex, double complex) __INTRODUCED_IN(26);
-float complex cpowf(float complex, float complex) __INTRODUCED_IN(26);
-long double complex cpowl(long double complex, long double complex) __INTRODUCED_IN(26);
+double complex cpow(double complex __x, double complex __z) __INTRODUCED_IN(26);
+float complex cpowf(float complex __x, float complex __z) __INTRODUCED_IN(26);
+long double complex cpowl(long double complex __x, long double complex __z) __INTRODUCED_IN(26);
 /* 7.3.8.3 The csqrt functions */
-double complex csqrt(double complex) __INTRODUCED_IN(23);
-float complex csqrtf(float complex) __INTRODUCED_IN(23);
-long double complex csqrtl(long double complex) __INTRODUCED_IN_32(21) __INTRODUCED_IN_64(23);
+double complex csqrt(double complex __z) __INTRODUCED_IN(23);
+float complex csqrtf(float complex __z) __INTRODUCED_IN(23);
+long double complex csqrtl(long double complex __z) __INTRODUCED_IN_32(21) __INTRODUCED_IN_64(23);
 
 /* 7.3.9 Manipulation functions */
 /* 7.3.9.1 The carg functions */
-double carg(double complex) __INTRODUCED_IN(23);
-float cargf(float complex) __INTRODUCED_IN(23);
-long double cargl(long double complex) __INTRODUCED_IN(23);
+double carg(double complex __z) __INTRODUCED_IN(23);
+float cargf(float complex __z) __INTRODUCED_IN(23);
+long double cargl(long double complex __z) __INTRODUCED_IN(23);
 /* 7.3.9.2 The cimag functions */
-double cimag(double complex) __INTRODUCED_IN(23);
-float cimagf(float complex) __INTRODUCED_IN(23);
-long double cimagl(long double complex) __INTRODUCED_IN(23);
+double cimag(double complex __z) __INTRODUCED_IN(23);
+float cimagf(float complex __z) __INTRODUCED_IN(23);
+long double cimagl(long double complex __z) __INTRODUCED_IN(23);
 /* 7.3.9.3 The conj functions */
-double complex conj(double complex) __INTRODUCED_IN(23);
-float complex conjf(float complex) __INTRODUCED_IN(23);
-long double complex conjl(long double complex) __INTRODUCED_IN(23);
+double complex conj(double complex __z) __INTRODUCED_IN(23);
+float complex conjf(float complex __z) __INTRODUCED_IN(23);
+long double complex conjl(long double complex __z) __INTRODUCED_IN(23);
 /* 7.3.9.4 The cproj functions */
-double complex cproj(double complex) __INTRODUCED_IN(23);
-float complex cprojf(float complex) __INTRODUCED_IN(23);
-long double complex cprojl(long double complex) __INTRODUCED_IN_32(21) __INTRODUCED_IN_64(23);
+double complex cproj(double complex __z) __INTRODUCED_IN(23);
+float complex cprojf(float complex __z) __INTRODUCED_IN(23);
+long double complex cprojl(long double complex __z) __INTRODUCED_IN_32(21) __INTRODUCED_IN_64(23);
 /* 7.3.9.5 The creal functions */
-double creal(double complex) __INTRODUCED_IN(23);
-float crealf(float complex) __INTRODUCED_IN(23);
-long double creall(long double complex) __INTRODUCED_IN(23);
+double creal(double complex __z) __INTRODUCED_IN(23);
+float crealf(float complex __z) __INTRODUCED_IN(23);
+long double creall(long double complex __z) __INTRODUCED_IN(23);
 
 __END_DECLS
 
-#endif /* _COMPLEX_H */
+#endif
diff --git a/libc/include/fenv.h b/libc/include/fenv.h
index a4c37e6..ae35ae3 100644
--- a/libc/include/fenv.h
+++ b/libc/include/fenv.h
@@ -37,25 +37,25 @@
 
 // fenv was always available on x86.
 #if __ANDROID_API__ >= __ANDROID_API_L__ || defined(__i386__)
-int feclearexcept(int) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21) __INTRODUCED_IN_X86(9);
-int fegetexceptflag(fexcept_t*, int) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21)
+int feclearexcept(int __exceptions) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21) __INTRODUCED_IN_X86(9);
+int fegetexceptflag(fexcept_t* __flag_ptr, int __exceptions) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21)
     __INTRODUCED_IN_X86(9);
-int feraiseexcept(int) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21) __INTRODUCED_IN_X86(9);
-int fesetexceptflag(const fexcept_t*, int) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21)
+int feraiseexcept(int __exceptions) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21) __INTRODUCED_IN_X86(9);
+int fesetexceptflag(const fexcept_t* __flag_ptr, int __exceptions) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21)
     __INTRODUCED_IN_X86(9);
-int fetestexcept(int) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21) __INTRODUCED_IN_X86(9);
+int fetestexcept(int __exceptions) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21) __INTRODUCED_IN_X86(9);
 
 int fegetround(void) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21) __INTRODUCED_IN_X86(9);
-int fesetround(int) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21) __INTRODUCED_IN_X86(9);
+int fesetround(int __rounding_mode) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21) __INTRODUCED_IN_X86(9);
 
-int fegetenv(fenv_t*) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21) __INTRODUCED_IN_X86(9);
-int feholdexcept(fenv_t*) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21) __INTRODUCED_IN_X86(9);
-int fesetenv(const fenv_t*) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21) __INTRODUCED_IN_X86(9);
-int feupdateenv(const fenv_t*) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21)
+int fegetenv(fenv_t* __env) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21) __INTRODUCED_IN_X86(9);
+int feholdexcept(fenv_t* __env) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21) __INTRODUCED_IN_X86(9);
+int fesetenv(const fenv_t* __env) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21) __INTRODUCED_IN_X86(9);
+int feupdateenv(const fenv_t* __env) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21)
     __INTRODUCED_IN_X86(9);
 
-int feenableexcept(int) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21) __INTRODUCED_IN_X86(9);
-int fedisableexcept(int) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21) __INTRODUCED_IN_X86(9);
+int feenableexcept(int __exceptions) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21) __INTRODUCED_IN_X86(9);
+int fedisableexcept(int __exceptions) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21) __INTRODUCED_IN_X86(9);
 int fegetexcept(void) __INTRODUCED_IN_ARM(21) __INTRODUCED_IN_MIPS(21) __INTRODUCED_IN_X86(9);
 #else
 /* Defined as inlines for pre-21 ARM and MIPS. */
diff --git a/libc/include/math.h b/libc/include/math.h
index 7dd1539..248ed3c 100644
--- a/libc/include/math.h
+++ b/libc/include/math.h
@@ -89,69 +89,69 @@
  * as __attribute_const__. In C99, FENV_ACCESS affects the purity of these functions.
  */
 
-int __fpclassifyd(double) __attribute_const__;
-int __fpclassifyf(float) __attribute_const__;
-int __fpclassifyl(long double) __attribute_const__;
-int __isfinitef(float) __attribute_const__;
-int __isfinite(double) __attribute_const__;
-int __isfinitel(long double) __attribute_const__;
-int __isinff(float) __attribute_const__;
-int __isinfl(long double) __attribute_const__;
-int __isnanf(float) __attribute_const__ __INTRODUCED_IN(21);
-int __isnanl(long double) __attribute_const__;
-int __isnormalf(float) __attribute_const__;
-int __isnormal(double) __attribute_const__;
-int __isnormall(long double) __attribute_const__;
-int __signbit(double) __attribute_const__;
-int __signbitf(float) __attribute_const__;
-int __signbitl(long double) __attribute_const__;
+int __fpclassifyd(double __x) __attribute_const__;
+int __fpclassifyf(float __x) __attribute_const__;
+int __fpclassifyl(long double __x) __attribute_const__;
+int __isfinitef(float __x) __attribute_const__;
+int __isfinite(double __x) __attribute_const__;
+int __isfinitel(long double __x) __attribute_const__;
+int __isinff(float __x) __attribute_const__;
+int __isinfl(long double __x) __attribute_const__;
+int __isnanf(float __x) __attribute_const__ __INTRODUCED_IN(21);
+int __isnanl(long double __x) __attribute_const__;
+int __isnormalf(float __x) __attribute_const__;
+int __isnormal(double __x) __attribute_const__;
+int __isnormall(long double __x) __attribute_const__;
+int __signbit(double __x) __attribute_const__;
+int __signbitf(float __x) __attribute_const__;
+int __signbitl(long double __x) __attribute_const__;
 
-double	acos(double);
-double	asin(double);
-double	atan(double);
-double	atan2(double, double);
-double	cos(double);
-double	sin(double);
-double	tan(double);
+double acos(double __x);
+double asin(double __x);
+double atan(double __x);
+double atan2(double __y, double __x);
+double cos(double __x);
+double sin(double __x);
+double tan(double __x);
 
-double	cosh(double);
-double	sinh(double);
-double	tanh(double);
+double cosh(double __x);
+double sinh(double __x);
+double tanh(double __x);
 
-double	exp(double);
-double	frexp(double, int *);	/* fundamentally !__attribute_const__ */
-double	ldexp(double, int);
-double	log(double);
-double	log10(double);
-double	modf(double, double *);	/* fundamentally !__attribute_const__ */
+double exp(double __x);
+double frexp(double __x, int* __exponent); /* fundamentally !__attribute_const__ */
+double ldexp(double __x, int __exponent);
+double log(double __x);
+double log10(double __x);
+double modf(double __x, double* __integral_part); /* fundamentally !__attribute_const__ */
 
-double	pow(double, double);
-double	sqrt(double);
+double pow(double __x, double __y);
+double sqrt(double __x);
 
-double	ceil(double);
-double	fabs(double) __attribute_const__;
-double	floor(double);
-double	fmod(double, double);
+double ceil(double __x);
+double fabs(double __x) __attribute_const__;
+double floor(double __x);
+double fmod(double __x, double __y);
 
-double	acosh(double);
-double	asinh(double);
-double	atanh(double);
-double	cbrt(double);
-double	erf(double);
-double	erfc(double);
-double	exp2(double);
-double	expm1(double);
-double	fma(double, double, double);
-double	hypot(double, double);
-int	ilogb(double) __attribute_const__;
-double	lgamma(double);
-long long llrint(double);
-long long llround(double);
-double	log1p(double);
-double log2(double) __INTRODUCED_IN(18);
-double	logb(double);
-long	lrint(double);
-long	lround(double);
+double acosh(double __x);
+double asinh(double __x);
+double atanh(double __x);
+double cbrt(double __x);
+double erf(double __x);
+double erfc(double __x);
+double exp2(double __x);
+double expm1(double __x);
+double fma(double __x, double __y, double __z);
+double hypot(double __x, double __y);
+int ilogb(double __x) __attribute_const__;
+double lgamma(double __x);
+long long llrint(double __x);
+long long llround(double __x);
+double log1p(double __x);
+double log2(double __x) __INTRODUCED_IN(18);
+double logb(double __x);
+long lrint(double __x);
+long lround(double __x);
 
 /*
  * https://code.google.com/p/android/issues/detail?id=271629
@@ -164,160 +164,160 @@
  * to the std namespace, making it impossible to use both <cmath> (which gets
  * included by a lot of other standard headers) and ::isnan.
  */
-int(isinf)(double) __attribute_const__ __INTRODUCED_IN(21);
-int	(isnan)(double) __attribute_const__;
+int (isinf)(double __x) __attribute_const__ __INTRODUCED_IN(21);
+int (isnan)(double __x) __attribute_const__;
 
-double nan(const char*) __attribute_const__ __INTRODUCED_IN_ARM(13) __INTRODUCED_IN_MIPS(13)
+double nan(const char* __kind) __attribute_const__ __INTRODUCED_IN_ARM(13) __INTRODUCED_IN_MIPS(13)
     __INTRODUCED_IN_X86(9);
 
-double	nextafter(double, double);
-double	remainder(double, double);
-double	remquo(double, double, int*);
-double	rint(double);
+double nextafter(double __x, double __y);
+double remainder(double __x, double __y);
+double remquo(double __x, double __y, int* __quotient_bits);
+double rint(double __x);
 
-double	copysign(double, double) __attribute_const__;
-double	fdim(double, double);
-double	fmax(double, double) __attribute_const__;
-double	fmin(double, double) __attribute_const__;
-double	nearbyint(double);
-double	round(double);
-double scalbln(double, long) __INTRODUCED_IN_X86(18) __VERSIONER_NO_GUARD;
-double scalbn(double, int);
-double	tgamma(double);
-double	trunc(double);
+double copysign(double __value, double __sign) __attribute_const__;
+double fdim(double __x, double __y);
+double fmax(double __x, double __y) __attribute_const__;
+double fmin(double __x, double __y) __attribute_const__;
+double nearbyint(double __x);
+double round(double __x);
+double scalbln(double __x, long __exponent) __INTRODUCED_IN_X86(18) __VERSIONER_NO_GUARD;
+double scalbn(double __x, int __exponent);
+double tgamma(double __x);
+double trunc(double __x);
 
-float	acosf(float);
-float	asinf(float);
-float	atanf(float);
-float	atan2f(float, float);
-float	cosf(float);
-float	sinf(float);
-float	tanf(float);
+float acosf(float __x);
+float asinf(float __x);
+float atanf(float __x);
+float atan2f(float __y, float __x);
+float cosf(float __x);
+float sinf(float __x);
+float tanf(float __x);
 
-float	coshf(float);
-float	sinhf(float);
-float	tanhf(float);
+float coshf(float __x);
+float sinhf(float __x);
+float tanhf(float __x);
 
-float	exp2f(float);
-float	expf(float);
-float	expm1f(float);
-float	frexpf(float, int *);	/* fundamentally !__attribute_const__ */
-int	ilogbf(float) __attribute_const__;
-float	ldexpf(float, int);
-float	log10f(float);
-float	log1pf(float);
-float log2f(float) __INTRODUCED_IN(18);
-float	logf(float);
-float	modff(float, float *);	/* fundamentally !__attribute_const__ */
+float exp2f(float __x);
+float expf(float __x);
+float expm1f(float __x);
+float frexpf(float __x, int* __exponent); /* fundamentally !__attribute_const__ */
+int ilogbf(float __x) __attribute_const__;
+float ldexpf(float __x, int __exponent);
+float log10f(float __x);
+float log1pf(float __x);
+float log2f(float __x) __INTRODUCED_IN(18);
+float logf(float __x);
+float modff(float __x, float* __integral_part); /* fundamentally !__attribute_const__ */
 
-float	powf(float, float);
-float	sqrtf(float);
+float powf(float __x, float __y);
+float sqrtf(float __x);
 
-float	ceilf(float);
-float	fabsf(float) __attribute_const__;
-float	floorf(float);
-float	fmodf(float, float);
-float	roundf(float);
+float ceilf(float __x);
+float fabsf(float __x) __attribute_const__;
+float floorf(float __x);
+float fmodf(float __x, float __y);
+float roundf(float __x);
 
-float	erff(float);
-float	erfcf(float);
-float	hypotf(float, float);
-float	lgammaf(float);
-float tgammaf(float) __INTRODUCED_IN_ARM(13) __INTRODUCED_IN_MIPS(13) __INTRODUCED_IN_X86(9);
+float erff(float __x);
+float erfcf(float __x);
+float hypotf(float __x, float __y);
+float lgammaf(float __x);
+float tgammaf(float __x) __INTRODUCED_IN_ARM(13) __INTRODUCED_IN_MIPS(13) __INTRODUCED_IN_X86(9);
 
-float	acoshf(float);
-float	asinhf(float);
-float	atanhf(float);
-float	cbrtf(float);
-float	logbf(float);
-float	copysignf(float, float) __attribute_const__;
-long long llrintf(float);
-long long llroundf(float);
-long	lrintf(float);
-long	lroundf(float);
-float nanf(const char*) __attribute_const__ __INTRODUCED_IN_ARM(13) __INTRODUCED_IN_MIPS(13)
+float acoshf(float __x);
+float asinhf(float __x);
+float atanhf(float __x);
+float cbrtf(float __x);
+float logbf(float __x);
+float copysignf(float __value, float __sign) __attribute_const__;
+long long llrintf(float __x);
+long long llroundf(float __x);
+long lrintf(float __x);
+long lroundf(float __x);
+float nanf(const char* __kind) __attribute_const__ __INTRODUCED_IN_ARM(13) __INTRODUCED_IN_MIPS(13)
     __INTRODUCED_IN_X86(9);
-float	nearbyintf(float);
-float	nextafterf(float, float);
-float	remainderf(float, float);
-float	remquof(float, float, int *);
-float	rintf(float);
-float	scalblnf(float, long) __INTRODUCED_IN_X86(18) __VERSIONER_NO_GUARD;
-float scalbnf(float, int);
-float	truncf(float);
+float nearbyintf(float __x);
+float nextafterf(float __x, float __y);
+float remainderf(float __x, float __y);
+float remquof(float __x, float __y, int* __quotient_bits);
+float rintf(float __x);
+float scalblnf(float __x, long __exponent) __INTRODUCED_IN_X86(18) __VERSIONER_NO_GUARD;
+float scalbnf(float __x, int __exponent);
+float truncf(float __x);
 
-float	fdimf(float, float);
-float	fmaf(float, float, float);
-float	fmaxf(float, float) __attribute_const__;
-float	fminf(float, float) __attribute_const__;
+float fdimf(float __x, float __y);
+float fmaf(float __x, float __y, float __z);
+float fmaxf(float __x, float __y) __attribute_const__;
+float fminf(float __x, float __y) __attribute_const__;
 
-long double acoshl(long double) __INTRODUCED_IN(21);
-long double acosl(long double) __INTRODUCED_IN(21);
-long double asinhl(long double) __INTRODUCED_IN(21);
-long double asinl(long double) __INTRODUCED_IN(21);
-long double atan2l(long double, long double) __INTRODUCED_IN(21);
-long double atanhl(long double) __INTRODUCED_IN(21);
-long double atanl(long double) __INTRODUCED_IN(21);
-long double cbrtl(long double) __INTRODUCED_IN(21);
-long double ceill(long double);
-long double copysignl(long double, long double) __attribute_const__;
-long double coshl(long double) __INTRODUCED_IN(21);
-long double cosl(long double) __INTRODUCED_IN(21);
-long double erfcl(long double) __INTRODUCED_IN(21);
-long double erfl(long double) __INTRODUCED_IN(21);
-long double exp2l(long double) __INTRODUCED_IN(21);
-long double expl(long double) __INTRODUCED_IN(21);
-long double expm1l(long double) __INTRODUCED_IN(21);
-long double fabsl(long double) __attribute_const__;
-long double fdiml(long double, long double);
-long double floorl(long double);
-long double fmal(long double, long double, long double) __INTRODUCED_IN(21) __VERSIONER_NO_GUARD;
-long double fmaxl(long double, long double) __attribute_const__;
-long double fminl(long double, long double) __attribute_const__;
-long double fmodl(long double, long double) __INTRODUCED_IN(21);
-long double frexpl(long double value, int*)
+long double acoshl(long double __x) __INTRODUCED_IN(21);
+long double acosl(long double __x) __INTRODUCED_IN(21);
+long double asinhl(long double __x) __INTRODUCED_IN(21);
+long double asinl(long double __x) __INTRODUCED_IN(21);
+long double atan2l(long double __y, long double __x) __INTRODUCED_IN(21);
+long double atanhl(long double __x) __INTRODUCED_IN(21);
+long double atanl(long double __x) __INTRODUCED_IN(21);
+long double cbrtl(long double __x) __INTRODUCED_IN(21);
+long double ceill(long double __x);
+long double copysignl(long double __value, long double __sign) __attribute_const__;
+long double coshl(long double __x) __INTRODUCED_IN(21);
+long double cosl(long double __x) __INTRODUCED_IN(21);
+long double erfcl(long double __x) __INTRODUCED_IN(21);
+long double erfl(long double __x) __INTRODUCED_IN(21);
+long double exp2l(long double __x) __INTRODUCED_IN(21);
+long double expl(long double __x) __INTRODUCED_IN(21);
+long double expm1l(long double __x) __INTRODUCED_IN(21);
+long double fabsl(long double __x) __attribute_const__;
+long double fdiml(long double __x, long double __y);
+long double floorl(long double __x);
+long double fmal(long double __x, long double __y, long double __z) __INTRODUCED_IN(21) __VERSIONER_NO_GUARD;
+long double fmaxl(long double __x, long double __y) __attribute_const__;
+long double fminl(long double __x, long double __y) __attribute_const__;
+long double fmodl(long double __x, long double __y) __INTRODUCED_IN(21);
+long double frexpl(long double __x, int* __exponent)
     __INTRODUCED_IN(21) __VERSIONER_NO_GUARD; /* fundamentally !__attribute_const__ */
-long double hypotl(long double, long double) __INTRODUCED_IN(21);
-int ilogbl(long double) __attribute_const__;
-long double ldexpl(long double, int);
-long double lgammal(long double) __INTRODUCED_IN(21);
-long long llrintl(long double) __INTRODUCED_IN(21);
-long long llroundl(long double);
-long double log10l(long double) __INTRODUCED_IN(21);
-long double log1pl(long double) __INTRODUCED_IN(21);
-long double log2l(long double) __INTRODUCED_IN(18);
-long double logbl(long double) __INTRODUCED_IN(18);
-long double logl(long double) __INTRODUCED_IN(21);
-long lrintl(long double) __INTRODUCED_IN(21);
-long lroundl(long double);
-long double modfl(long double, long double*) __INTRODUCED_IN(21); /* fundamentally !__attribute_const__ */
-long double nanl(const char*) __attribute_const__ __INTRODUCED_IN(13);
-long double nearbyintl(long double) __INTRODUCED_IN(21);
-long double nextafterl(long double, long double) __INTRODUCED_IN(21) __VERSIONER_NO_GUARD;
-double nexttoward(double, long double) __INTRODUCED_IN(18) __VERSIONER_NO_GUARD;
-float nexttowardf(float, long double);
-long double nexttowardl(long double, long double) __INTRODUCED_IN(18) __VERSIONER_NO_GUARD;
-long double powl(long double, long double) __INTRODUCED_IN(21);
-long double remainderl(long double, long double) __INTRODUCED_IN(21);
-long double remquol(long double, long double, int*) __INTRODUCED_IN(21);
-long double rintl(long double) __INTRODUCED_IN(21);
-long double roundl(long double);
-long double scalblnl(long double, long) __INTRODUCED_IN_X86(18) __VERSIONER_NO_GUARD;
-long double scalbnl(long double, int);
-long double sinhl(long double) __INTRODUCED_IN(21);
-long double sinl(long double) __INTRODUCED_IN(21);
-long double sqrtl(long double) __INTRODUCED_IN(21);
-long double tanhl(long double) __INTRODUCED_IN(21);
-long double tanl(long double) __INTRODUCED_IN(21);
-long double tgammal(long double) __INTRODUCED_IN(21);
-long double truncl(long double);
+long double hypotl(long double __x, long double __y) __INTRODUCED_IN(21);
+int ilogbl(long double __x) __attribute_const__;
+long double ldexpl(long double __x, int __exponent);
+long double lgammal(long double __x) __INTRODUCED_IN(21);
+long long llrintl(long double __x) __INTRODUCED_IN(21);
+long long llroundl(long double __x);
+long double log10l(long double __x) __INTRODUCED_IN(21);
+long double log1pl(long double __x) __INTRODUCED_IN(21);
+long double log2l(long double __x) __INTRODUCED_IN(18);
+long double logbl(long double __x) __INTRODUCED_IN(18);
+long double logl(long double __x) __INTRODUCED_IN(21);
+long lrintl(long double __x) __INTRODUCED_IN(21);
+long lroundl(long double __x);
+long double modfl(long double __x, long double* __integral_part) __INTRODUCED_IN(21); /* fundamentally !__attribute_const__ */
+long double nanl(const char* __kind) __attribute_const__ __INTRODUCED_IN(13);
+long double nearbyintl(long double __x) __INTRODUCED_IN(21);
+long double nextafterl(long double __x, long double __y) __INTRODUCED_IN(21) __VERSIONER_NO_GUARD;
+double nexttoward(double __x, long double __y) __INTRODUCED_IN(18) __VERSIONER_NO_GUARD;
+float nexttowardf(float __x, long double __y);
+long double nexttowardl(long double __x, long double __y) __INTRODUCED_IN(18) __VERSIONER_NO_GUARD;
+long double powl(long double __x, long double __y) __INTRODUCED_IN(21);
+long double remainderl(long double __x, long double __y) __INTRODUCED_IN(21);
+long double remquol(long double __x, long double __y, int* __quotient_bits) __INTRODUCED_IN(21);
+long double rintl(long double __x) __INTRODUCED_IN(21);
+long double roundl(long double __x);
+long double scalblnl(long double __x, long __exponent) __INTRODUCED_IN_X86(18) __VERSIONER_NO_GUARD;
+long double scalbnl(long double __x, int __exponent);
+long double sinhl(long double __x) __INTRODUCED_IN(21);
+long double sinl(long double __x) __INTRODUCED_IN(21);
+long double sqrtl(long double __x) __INTRODUCED_IN(21);
+long double tanhl(long double __x) __INTRODUCED_IN(21);
+long double tanl(long double __x) __INTRODUCED_IN(21);
+long double tgammal(long double __x) __INTRODUCED_IN(21);
+long double truncl(long double __x);
 
-double j0(double);
-double j1(double);
-double jn(int, double);
-double y0(double);
-double y1(double);
-double yn(int, double);
+double j0(double __x);
+double j1(double __x);
+double jn(int __n, double __x);
+double y0(double __x);
+double y1(double __x);
+double yn(int __n, double __x);
 
 #define M_E		2.7182818284590452354	/* e */
 #define M_LOG2E		1.4426950408889634074	/* log 2e */
@@ -336,29 +336,29 @@
 #define MAXFLOAT	((float)3.40282346638528860e+38)
 
 #if defined(__USE_BSD) || defined(__USE_GNU)
-double gamma(double);
-double scalb(double, double);
-double drem(double, double);
-int finite(double) __attribute_const__;
-int isnanf(float) __attribute_const__;
-double gamma_r(double, int*);
-double lgamma_r(double, int*);
-double significand(double);
-long double lgammal_r(long double, int*) __INTRODUCED_IN(23);
-long double significandl(long double) __INTRODUCED_IN(21);
-float dremf(float, float);
-int finitef(float) __attribute_const__;
-float gammaf(float);
-float j0f(float);
-float j1f(float);
-float jnf(int, float);
-float scalbf(float, float);
-float y0f(float);
-float y1f(float);
-float ynf(int, float);
-float gammaf_r(float, int *);
-float lgammaf_r(float, int *);
-float significandf(float);
+double gamma(double __x);
+double scalb(double __x, double __exponent);
+double drem(double __x, double __y);
+int finite(double __x) __attribute_const__;
+int isnanf(float __x) __attribute_const__;
+double gamma_r(double __x, int* __sign);
+double lgamma_r(double __x, int* __sign);
+double significand(double __x);
+long double lgammal_r(long double __x, int* __sign) __INTRODUCED_IN(23);
+long double significandl(long double __x) __INTRODUCED_IN(21);
+float dremf(float __x, float __y);
+int finitef(float __x) __attribute_const__;
+float gammaf(float __x);
+float j0f(float __x);
+float j1f(float __x);
+float jnf(int __n, float __x);
+float scalbf(float __x, float __exponent);
+float y0f(float __x);
+float y1f(float __x);
+float ynf(int __n, float __x);
+float gammaf_r(float __x, int* __sign);
+float lgammaf_r(float __x, int* __sign);
+float significandf(float __x);
 #endif
 
 #if defined(__USE_GNU)
@@ -375,11 +375,11 @@
 #define M_2_SQRTPIl     1.128379167095512573896158903121545172L /* 2/sqrt(pi) */
 #define M_SQRT2l        1.414213562373095048801688724209698079L /* sqrt(2) */
 #define M_SQRT1_2l      0.707106781186547524400844362104849039L /* 1/sqrt(2) */
-void sincos(double, double*, double*);
-void sincosf(float, float*, float*);
-void sincosl(long double, long double*, long double*);
+void sincos(double __x, double* __sin, double* __cos);
+void sincosf(float __x, float* __sin, float* __cos);
+void sincosl(long double __x, long double* __sin, long double* __cos);
 #endif
 
 __END_DECLS
 
-#endif /* !_MATH_H_ */
+#endif
diff --git a/libc/include/string.h b/libc/include/string.h
index 164146d..33ef468 100644
--- a/libc/include/string.h
+++ b/libc/include/string.h
@@ -41,83 +41,81 @@
 #include <strings.h>
 #endif
 
-void* memccpy(void*, const void*, int, size_t);
-void* memchr(const void*, int, size_t) __attribute_pure__ __overloadable __RENAME_CLANG(memchr);
-void* memrchr(const void*, int, size_t) __attribute_pure__ __overloadable __RENAME_CLANG(memrchr);
-int memcmp(const void*, const void*, size_t) __attribute_pure__;
+void* memccpy(void* __dst, const void* __src, int __stop_char, size_t __n);
+void* memchr(const void* __s, int __ch, size_t __n) __attribute_pure__ __overloadable __RENAME_CLANG(memchr);
+void* memrchr(const void* __s, int __ch, size_t __n) __attribute_pure__ __overloadable __RENAME_CLANG(memrchr);
+int memcmp(const void* __lhs, const void* __rhs, size_t __n) __attribute_pure__;
 void* memcpy(void*, const void*, size_t)
         __overloadable __RENAME_CLANG(memcpy);
 #if defined(__USE_GNU)
-void* mempcpy(void*, const void*, size_t) __INTRODUCED_IN(23);
+void* mempcpy(void* __dst, const void* __src, size_t __n) __INTRODUCED_IN(23);
 #endif
-void* memmove(void*, const void*, size_t) __overloadable __RENAME_CLANG(memmove);
-void* memset(void*, int, size_t) __overloadable __RENAME_CLANG(memset);
-void* memmem(const void*, size_t, const void*, size_t) __attribute_pure__;
+void* memmove(void* __dst, const void* __src, size_t __n) __overloadable __RENAME_CLANG(memmove);
+void* memset(void* __dst, int __ch, size_t __n) __overloadable __RENAME_CLANG(memset);
+void* memmem(const void* __haystack, size_t __haystack_size, const void* __needle, size_t __needle_size) __attribute_pure__;
 
-char* strchr(const char*, int) __attribute_pure__ __overloadable __RENAME_CLANG(strchr);
-char* __strchr_chk(const char*, int, size_t) __INTRODUCED_IN(18);
+char* strchr(const char* __s, int __ch) __attribute_pure__ __overloadable __RENAME_CLANG(strchr);
+char* __strchr_chk(const char* __s, int __ch, size_t __n) __INTRODUCED_IN(18);
 #if defined(__USE_GNU)
 #if defined(__cplusplus)
 /* The versioner doesn't handle C++ blocks yet, so manually guarded. */
 #if __ANDROID_API__ >= 24
-extern "C++" char* strchrnul(char*, int) __RENAME(strchrnul) __attribute_pure__ __INTRODUCED_IN(24);
-extern "C++" const char* strchrnul(const char*, int) __RENAME(strchrnul) __attribute_pure__ __INTRODUCED_IN(24);
+extern "C++" char* strchrnul(char* __s, int __ch) __RENAME(strchrnul) __attribute_pure__ __INTRODUCED_IN(24);
+extern "C++" const char* strchrnul(const char* __s, int __ch) __RENAME(strchrnul) __attribute_pure__ __INTRODUCED_IN(24);
 #endif  /* __ANDROID_API__ >= 24 */
 #else
-char* strchrnul(const char*, int) __attribute_pure__ __INTRODUCED_IN(24);
+char* strchrnul(const char* __s, int __ch) __attribute_pure__ __INTRODUCED_IN(24);
 #endif
 #endif
 
-char* strrchr(const char*, int) __attribute_pure__ __overloadable __RENAME_CLANG(strrchr);
-char* __strrchr_chk(const char*, int, size_t) __INTRODUCED_IN(18);
+char* strrchr(const char* __s, int __ch) __attribute_pure__ __overloadable __RENAME_CLANG(strrchr);
+char* __strrchr_chk(const char* __s, int __ch, size_t __n) __INTRODUCED_IN(18);
 
-size_t strlen(const char*) __attribute_pure__ __overloadable
-        __RENAME_CLANG(strlen);
-size_t __strlen_chk(const char*, size_t) __INTRODUCED_IN(17);
+size_t strlen(const char* __s) __attribute_pure__ __overloadable __RENAME_CLANG(strlen);
+size_t __strlen_chk(const char* __s, size_t __n) __INTRODUCED_IN(17);
 
-int strcmp(const char*, const char*) __attribute_pure__;
-char* stpcpy(char*, const char*) __overloadable __RENAME_CLANG(stpcpy) __INTRODUCED_IN(21);
-char* strcpy(char*, const char*)
-        __overloadable __RENAME_CLANG(strcpy);
-char* strcat(char*, const char*) __overloadable __RENAME_CLANG(strcat);
-char* strdup(const char*);
+int strcmp(const char* __lhs, const char* __rhs) __attribute_pure__;
+char* stpcpy(char* __dst, const char* __src) __overloadable __RENAME_CLANG(stpcpy) __INTRODUCED_IN(21);
+char* strcpy(char* __dst, const char* __src) __overloadable __RENAME_CLANG(strcpy);
+char* strcat(char* __dst, const char* __src) __overloadable __RENAME_CLANG(strcat);
+char* strdup(const char* __s);
 
-char* strstr(const char*, const char*) __attribute_pure__;
-char* strcasestr(const char*, const char*) __attribute_pure__;
-char* strtok(char*, const char*);
-char* strtok_r(char*, const char*, char**);
+char* strstr(const char* __haystack, const char* __needle) __attribute_pure__;
+char* strcasestr(const char* __haystack, const char* __needle) __attribute_pure__;
+char* strtok(char* __s, const char* __delimiter);
+char* strtok_r(char* __s, const char* __delimiter, char** __pos_ptr);
 
-char* strerror(int);
-char* strerror_l(int, locale_t) __INTRODUCED_IN(23);
+char* strerror(int __errno_value);
+char* strerror_l(int __errno_value, locale_t __l) __INTRODUCED_IN(23);
 #if defined(__USE_GNU) && __ANDROID_API__ >= 23
-char* strerror_r(int, char*, size_t) __RENAME(__gnu_strerror_r) __INTRODUCED_IN(23);
+char* strerror_r(int __errno_value, char* __buf, size_t __n) __RENAME(__gnu_strerror_r) __INTRODUCED_IN(23);
 #else /* POSIX */
-int strerror_r(int, char*, size_t);
+int strerror_r(int __errno_value, char* __buf, size_t __n);
 #endif
 
-size_t strnlen(const char*, size_t) __attribute_pure__;
-char* strncat(char*, const char*, size_t) __overloadable __RENAME_CLANG(strncat);
-char* strndup(const char*, size_t);
-int strncmp(const char*, const char*, size_t) __attribute_pure__;
-char* stpncpy(char*, const char*, size_t) __overloadable __RENAME_CLANG(stpncpy) __INTRODUCED_IN(21);
-char* strncpy(char*, const char*, size_t) __overloadable __RENAME_CLANG(strncpy);
+size_t strnlen(const char* __s, size_t __n) __attribute_pure__;
+char* strncat(char* __dst, const char* __src, size_t __n) __overloadable __RENAME_CLANG(strncat);
+char* strndup(const char* __s, size_t __n);
+int strncmp(const char* __lhs, const char* __rhs, size_t __n) __attribute_pure__;
+char* stpncpy(char* __dst, const char* __src, size_t __n) __overloadable __RENAME_CLANG(stpncpy) __INTRODUCED_IN(21);
+char* strncpy(char* __dst, const char* __src, size_t __n) __overloadable __RENAME_CLANG(strncpy);
 
-size_t strlcat(char*, const char*, size_t) __overloadable __RENAME_CLANG(strlcat);
-size_t strlcpy(char*, const char*, size_t) __overloadable __RENAME_CLANG(strlcpy);
+size_t strlcat(char* __dst, const char* __src, size_t __n) __overloadable __RENAME_CLANG(strlcat);
+size_t strlcpy(char* __dst, const char* __src, size_t __n) __overloadable __RENAME_CLANG(strlcpy);
 
-size_t strcspn(const char*, const char*) __attribute_pure__;
-char* strpbrk(const char*, const char*) __attribute_pure__;
-char* strsep(char**, const char*);
-size_t strspn(const char*, const char*);
+size_t strcspn(const char* __s, const char* __reject) __attribute_pure__;
+char* strpbrk(const char* __s, const char* __accept) __attribute_pure__;
+char* strsep(char** __s_ptr, const char* __delimiter);
+size_t strspn(const char* __s, const char* __accept);
 
-char* strsignal(int);
+char* strsignal(int __signal);
 
-int strcoll(const char*, const char*) __attribute_pure__;
-size_t strxfrm(char*, const char*, size_t);
+int strcoll(const char* __lhs, const char* __rhs) __attribute_pure__;
+size_t strxfrm(char* __dst, const char* __src, size_t __n);
 
 #if __ANDROID_API__ >= __ANDROID_API_L__
-int strcoll_l(const char*, const char*, locale_t) __attribute_pure__ __INTRODUCED_IN(21);
-size_t strxfrm_l(char*, const char*, size_t, locale_t) __INTRODUCED_IN(21);
+int strcoll_l(const char* __lhs, const char* __rhs, locale_t __l) __attribute_pure__ __INTRODUCED_IN(21);
+size_t strxfrm_l(char* __dst, const char* __src, size_t __n, locale_t __l) __INTRODUCED_IN(21);
 #else
 // Implemented as static inlines before 21.
 #endif
@@ -130,11 +128,11 @@
 #if defined(__cplusplus)
 /* The versioner doesn't handle C++ blocks yet, so manually guarded. */
 #if __ANDROID_API__ >= 23
-extern "C++" char* basename(char*) __RENAME(__gnu_basename) __INTRODUCED_IN(23);
-extern "C++" const char* basename(const char*) __RENAME(__gnu_basename) __INTRODUCED_IN(23);
+extern "C++" char* basename(char* __path) __RENAME(__gnu_basename) __INTRODUCED_IN(23);
+extern "C++" const char* basename(const char* __path) __RENAME(__gnu_basename) __INTRODUCED_IN(23);
 #endif  /* __ANDROID_API__ >= 23 */
 #else
-char* basename(const char*) __RENAME(__gnu_basename) __INTRODUCED_IN(23);
+char* basename(const char* __path) __RENAME(__gnu_basename) __INTRODUCED_IN(23);
 #endif
 #endif
 
@@ -230,4 +228,4 @@
 
 __END_DECLS
 
-#endif /* _STRING_H */
+#endif