```5261 libm should stop using synonyms.h
5298 fabs is 0-sized, confuses dis(1) and others
Reviewed by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
Approved by: Gordon Ross <gwr@nexenta.com>
```

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```          --- old/usr/src/lib/libm/common/C/sincos.c
+++ new/usr/src/lib/libm/common/C/sincos.c
```
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```  19   19   * CDDL HEADER END
20   20   */
21   21  /*
23   23   */
24   24  /*
26   26   * Use is subject to license terms.
27   27   */
28   28
29      -#pragma weak sincos = __sincos
29 +#pragma weak __sincos = sincos
30   30
31   31  /* INDENT OFF */
32   32  /*
33   33   * sincos(x,s,c)
34   34   * Accurate Table look-up algorithm by K.C. Ng, 2000.
35   35   *
36   36   * 1. Reduce x to x>0 by cos(-x)=cos(x), sin(-x)=-sin(x).
37   37   * 2. For 0<= x < 8, let i = (64*x chopped)-10. Let d = x - a[i], where
38   38   *    a[i] is a double that is close to (i+10.5)/64 (and hence |d|< 10.5/64)
39   39   *    and such that sin(a[i]) and cos(a[i]) is close to a double (with error
```
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