diff --git a/e_acos.cpp b/e_acos.cpp
--- a/e_acos.cpp
+++ b/e_acos.cpp
@@ -34,16 +34,17 @@
  * Special cases:
  *	if x is NaN, return x itself;
  *	if |x|>1, return NaN with invalid signal.
  *
  * Function needed: sqrt
  */
 
 #include <float.h>
+#include <math.h>
 
 #include "math_private.h"
 
 static const double
 one=  1.00000000000000000000e+00, /* 0x3FF00000, 0x00000000 */
 pi =  3.14159265358979311600e+00, /* 0x400921FB, 0x54442D18 */
 pio2_hi =  1.57079632679489655800e+00; /* 0x3FF921FB, 0x54442D18 */
 static volatile double
diff --git a/e_acosh.cpp b/e_acosh.cpp
--- a/e_acosh.cpp
+++ b/e_acosh.cpp
@@ -25,16 +25,17 @@
  *		acosh(x) := log1p(t+sqrt(2.0*t+t*t)); where t=x-1.
  *
  * Special cases:
  *	acosh(x) is NaN with signal if x<1.
  *	acosh(NaN) is NaN without signal.
  */
 
 #include <float.h>
+#include <math.h>
 
 #include "math_private.h"
 
 static const double
 one	= 1.0,
 ln2	= 6.93147180559945286227e-01;  /* 0x3FE62E42, 0xFEFA39EF */
 
 double
diff --git a/e_asin.cpp b/e_asin.cpp
--- a/e_asin.cpp
+++ b/e_asin.cpp
@@ -40,16 +40,17 @@
  *
  * Special cases:
  *	if x is NaN, return x itself;
  *	if |x|>1, return NaN with invalid signal.
  *
  */
 
 #include <float.h>
+#include <math.h>
 
 #include "math_private.h"
 
 static const double
 one =  1.00000000000000000000e+00, /* 0x3FF00000, 0x00000000 */
 huge =  1.000e+300,
 pio2_hi =  1.57079632679489655800e+00, /* 0x3FF921FB, 0x54442D18 */
 pio2_lo =  6.12323399573676603587e-17, /* 0x3C91A626, 0x33145C07 */
diff --git a/e_hypot.cpp b/e_hypot.cpp
--- a/e_hypot.cpp
+++ b/e_hypot.cpp
@@ -42,16 +42,17 @@
  *	hypot(x,y) is NAN if x or y is NAN.
  *
  * Accuracy:
  * 	hypot(x,y) returns sqrt(x^2+y^2) with error less 
  * 	than 1 ulps (units in the last place) 
  */
 
 #include <float.h>
+#include <math.h>
 
 #include "math_private.h"
 
 double
 __ieee754_hypot(double x, double y)
 {
 	double a,b,t1,t2,y1,y2,w;
 	int32_t j,k,ha,hb;
diff --git a/e_pow.cpp b/e_pow.cpp
--- a/e_pow.cpp
+++ b/e_pow.cpp
@@ -53,16 +53,17 @@
  * Constants :
  * The hexadecimal values are the intended ones for the following
  * constants. The decimal values may be used, provided that the
  * compiler will convert from decimal to binary accurately enough
  * to produce the hexadecimal values shown.
  */
 
 #include <float.h>
+#include <math.h>
 #include "math_private.h"
 
 static const double
 bp[] = {1.0, 1.5,},
 dp_h[] = { 0.0, 5.84962487220764160156e-01,}, /* 0x3FE2B803, 0x40000000 */
 dp_l[] = { 0.0, 1.35003920212974897128e-08,}, /* 0x3E4CFDEB, 0x43CFD006 */
 zero    =  0.0,
 half    =  0.5,
diff --git a/s_asinh.cpp b/s_asinh.cpp
--- a/s_asinh.cpp
+++ b/s_asinh.cpp
@@ -20,16 +20,17 @@
  *	we have
  *	asinh(x) := x  if  1+x*x=1,
  *		 := sign(x)*(log(x)+ln2)) for large |x|, else
  *		 := sign(x)*log(2|x|+1/(|x|+sqrt(x*x+1))) if|x|>2, else
  *		 := sign(x)*log1p(|x| + x^2/(1 + sqrt(1+x^2)))
  */
 
 #include <float.h>
+#include <math.h>
 
 #include "math_private.h"
 
 static const double
 one =  1.00000000000000000000e+00, /* 0x3FF00000, 0x00000000 */
 ln2 =  6.93147180559945286227e-01, /* 0x3FE62E42, 0xFEFA39EF */
 huge=  1.00000000000000000000e+300;
 
--- a/e_asinf.cpp	2022-12-13 14:45:17.953154257 -0500
+++ b/e_asinf.cpp	2022-12-13 14:45:03.425091710 -0500
@@ -11,16 +11,18 @@
  * software is freely granted, provided that this notice
  * is preserved.
  * ====================================================
  */
 
 //#include <sys/cdefs.h>
 //__FBSDID("$FreeBSD$");
 
+#include <math.h>
+
 #include "math_private.h"
 
 static const float
 one =  1.0000000000e+00, /* 0x3F800000 */
 huge =  1.000e+30,
 	/* coefficient for R(x^2) */
 pS0 =  1.6666586697e-01,
 pS1 = -4.2743422091e-02,