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configure.in: check atan2

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* configure.in (rb_cv_atan2_inf_c99): check whether runtime atan2
  handles Inf as C99.  ruby-core:62536] [Bug #9831]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45930 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2014-05-12 14:57:17 +00:00
parent b063dd016c
commit f0fc13aaea
3 changed files with 35 additions and 2 deletions
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3
math.c
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@ -79,8 +79,7 @@ math_atan2(VALUE obj, VALUE y, VALUE x)
return DBL2NUM(M_PI);
return DBL2NUM(-M_PI);
}
#if !(defined(HAVE_ATAN2L) && defined(HAVE_ATAN2F))
/* assume atan2() doesn't handle Inf as C99 */
#ifndef ATAN2_INF_C99
if (isinf(dx) && isinf(dy)) {
/* optimization for FLONUM */
if (dx < 0.0) {