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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
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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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5
ChangeLog
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@ -1,3 +1,8 @@
Mon May 12 23:57:15 2014 Nobuyoshi Nakada <nobu@ruby-lang.org>
* configure.in (rb_cv_atan2_inf_c99): check whether runtime atan2
handles Inf as C99. ruby-core:62536] [Bug #9831]
Mon May 12 20:33:01 2014 Tanaka Akira <akr@fsij.org> Mon May 12 20:33:01 2014 Tanaka Akira <akr@fsij.org>
* configure.in: Invoke AC_REPLACE_FUNCS for each function. * configure.in: Invoke AC_REPLACE_FUNCS for each function.

29
configure.in
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@ -2145,6 +2145,35 @@ void qsort_r(void *base, size_t nmemb, size_t size,
]) ])
fi fi
AC_CACHE_CHECK(whether atan2 handles Inf as C99, rb_cv_atan2_inf_c99, [
AS_IF([test $ac_cv_func_atan2f:$ac_cv_func_atan2l = yes:yes], [
AC_TRY_RUN([
@%:@include <math.h>
@%:@ifdef HAVE_UNISTD_H
@%:@include <unistd.h>
@%:@endif
@%:@ifndef EXIT_SUCCESS
@%:@define EXIT_SUCCESS 0
@%:@endif
@%:@ifndef EXIT_FAILURE
@%:@define EXIT_FAILURE 1
@%:@endif
int
main(int argc, char **argv)
{
if (fabs(atan2(INFINITY, INFINITY) - M_PI_4) <= 0.01) return EXIT_SUCCESS;
return EXIT_FAILURE;
}
],
[rb_cv_atan2_inf_c99=yes],
[rb_cv_atan2_inf_c99=no],
[AS_CASE($target_os, [mingw*|mswin*], [rb_cv_atan2_inf_c99=no], [rb_cv_atan2_inf_c99=yes])]
)
])
])
AS_IF([test $rb_cv_atan2_inf_c99 = yes], [AC_DEFINE(ATAN2_INF_C99)])
# Some platform need -lrt for clock_gettime, but the other don't. # Some platform need -lrt for clock_gettime, but the other don't.
if test x"$ac_cv_func_clock_gettime" != xyes; then if test x"$ac_cv_func_clock_gettime" != xyes; then
# glibc 2.17 moves clock_* functions from librt to the main C library. # glibc 2.17 moves clock_* functions from librt to the main C library.

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);
return DBL2NUM(-M_PI); return DBL2NUM(-M_PI);
} }
#if !(defined(HAVE_ATAN2L) && defined(HAVE_ATAN2F)) #ifndef ATAN2_INF_C99
/* assume atan2() doesn't handle Inf as C99 */
if (isinf(dx) && isinf(dy)) { if (isinf(dx) && isinf(dy)) {
/* optimization for FLONUM */ /* optimization for FLONUM */
if (dx < 0.0) { if (dx < 0.0) {