Reland of land "Turn libbase into a component"

src/base/ieee754.h

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_BASE_IEEE754_H_
 #define V8_BASE_IEEE754_H_
 
+#include "src/base/base-export.h"
+
 namespace v8 {
 namespace base {
 namespace ieee754 {
 
 // Returns the arc cosine of |x|; that is the value whose cosine is |x|.
-double acos(double x);
+V8_BASE_EXPORT double acos(double x);
 
 // Returns the inverse hyperbolic cosine of |x|; that is the value whose
 // hyperbolic cosine is |x|.
-double acosh(double x);
+V8_BASE_EXPORT double acosh(double x);
 
 // Returns the arc sine of |x|; that is the value whose sine is |x|.
-double asin(double x);
+V8_BASE_EXPORT double asin(double x);
 
 // Returns the inverse hyperbolic sine of |x|; that is the value whose
 // hyperbolic sine is |x|.
-double asinh(double x);
+V8_BASE_EXPORT double asinh(double x);
 
 // Returns the principal value of the arc tangent of |x|; that is the value
 // whose tangent is |x|.
-double atan(double x);
+V8_BASE_EXPORT double atan(double x);
 
 // Returns the principal value of the arc tangent of |y/x|, using the signs of
 // the two arguments to determine the quadrant of the result.
-double atan2(double y, double x);
+V8_BASE_EXPORT double atan2(double y, double x);
 
 // Returns the cosine of |x|, where |x| is given in radians.
-double cos(double x);
+V8_BASE_EXPORT double cos(double x);
 
 // Returns the base-e exponential of |x|.
-double exp(double x);
+V8_BASE_EXPORT double exp(double x);
 
-double atanh(double x);
+V8_BASE_EXPORT double atanh(double x);
 
 // Returns the natural logarithm of |x|.
-double log(double x);
+V8_BASE_EXPORT double log(double x);
 
 // Returns a value equivalent to |log(1+x)|, but computed in a way that is
 // accurate even if the value of |x| is near zero.
-double log1p(double x);
+V8_BASE_EXPORT double log1p(double x);
 
 // Returns the base 2 logarithm of |x|.
-double log2(double x);
+V8_BASE_EXPORT double log2(double x);
 
 // Returns the base 10 logarithm of |x|.
-double log10(double x);
+V8_BASE_EXPORT double log10(double x);
 
 // Returns the cube root of |x|.
-double cbrt(double x);
+V8_BASE_EXPORT double cbrt(double x);
 
 // Returns exp(x)-1, the exponential of |x| minus 1.
-double expm1(double x);
+V8_BASE_EXPORT double expm1(double x);
 
 // Returns the sine of |x|, where |x| is given in radians.
-double sin(double x);
+V8_BASE_EXPORT double sin(double x);
 
 // Returns the tangent of |x|, where |x| is given in radians.
-double tan(double x);
+V8_BASE_EXPORT double tan(double x);
 
 // Returns the hyperbolic cosine of |x|, where |x| is given radians.
-double cosh(double x);
+V8_BASE_EXPORT double cosh(double x);
 
 // Returns the hyperbolic sine of |x|, where |x| is given radians.
-double sinh(double x);
+V8_BASE_EXPORT double sinh(double x);
 
 // Returns the hyperbolic tangent of |x|, where |x| is given radians.
-double tanh(double x);
+V8_BASE_EXPORT double tanh(double x);
 
 }  // namespace ieee754
 }  // namespace base
 }  // namespace v8
 
 #endif  // V8_BASE_IEEE754_H_