[tor-bugs] #18706 [Tor]: tor-0.2.8.2-alpha, undefined symbolo "signbit" when compiling for Solaris10

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#18706: tor-0.2.8.2-alpha, undefined symbolo "signbit"  when compiling for
Solaris10
-------------------------------------------------+-------------------------
 Reporter:  RainerSchmidt                        |          Owner:
     Type:  defect                               |         Status:  new
 Priority:  Medium                               |      Milestone:
Component:  Tor                                  |        Version:  Tor:
 Severity:  Normal                               |  0.2.8.2-alpha
 Keywords:  undefined symbolo signbit            |     Resolution:
  regression                                     |  Actual Points:
Parent ID:                                       |         Points:  small
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------

Comment (by RainerSchmidt):

 Solaris10 has a signbit(), see included man page.
 But I found some comments via google that the implementation is wrong,
 search for:
 signbit solaris

 Thanks.
 Rainer

 man page for signbit:
 -------------------------------------------------------------------------------------------------------

 Mathematical Library Functions                        signbit(3M)

 NAME

   signbit - test sign

 SYNOPSIS

   c99 [ flag... ] file... -lm [ library... ]#include <math.h>

   int signbit(real-floating x);

 DESCRIPTION

   The signbit() macro determines whether the sign of its argu-ment  value
 is negative. NaNs, zeros, and infinities have asign bit.

 RETURN VALUES

   The signbit() macro returns a non-zero value if and only  ifthe sign of
 its argument value is negative.

 ERRORS

   No errors are defined.

 ATTRIBUTES

   See attributes(5) for descriptions of the  following  attri-butes:

 |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |

   |_|_
   || Interface Stability         | Standard || _|_ || MT-Level
 | MT-Safe || _|_| ||

 SEE ALSO

   fpclassify(3M),    isfinite(3M),    isinf(3M),
 isnan(3M),isnormal(3M), math.h(3HEAD), attributes(5), standards(5)

 SunOS 5.10          Last change: 12 Jul 2006

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18706#comment:2>
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