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configure.in: check lgamma_r(-0.0)

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* configure.in (rb_cv_lgamma_r_m0): check if lgamma_r(-0.0)
  returns negative infinity.  [Bug #12249]
* math.c (ruby_lgamma_r): define by the configured result.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54499 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2016-04-06 05:13:29 +00:00
parent 9d31efc6f0
commit ea736d55f9
3 changed files with 40 additions and 1 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
Wed Apr 6 14:13:28 2016 Nobuyoshi Nakada <nobu@ruby-lang.org>
* configure.in (rb_cv_lgamma_r_m0): check if lgamma_r(-0.0)
returns negative infinity. [Bug #12249]
* math.c (ruby_lgamma_r): define by the configured result.
Wed Apr 6 10:56:15 2016 Anton Davydov <antondavydov.o@gmail.com>
* lib/logger.rb (Logger#level=): remove unnecessary local

32
configure.in
View file

@ -2498,6 +2498,38 @@ main(int argc, char **argv)
])
AS_IF([test "x$rb_cv_atan2_inf_c99" = xyes], [AC_DEFINE(ATAN2_INF_C99)])
AS_IF([test "x$ac_cv_func_lgamma_r" = xyes], [
AC_CACHE_CHECK(whether lgamma_r handles -0.0, rb_cv_lgamma_r_m0, [
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)
{
int sign;
if (lgamma_r(-0.0, &sign) >= 0) return EXIT_FAILURE;
if (sign != -1) return EXIT_FAILURE;
return EXIT_SUCCESS;
}
],
[rb_cv_lgamma_r_m0=yes],
[rb_cv_lgamma_r_m0=no],
[rb_cv_lgamma_r_m0=yes]
)
])
AS_IF([test "x$rb_cv_lgamma_r_m0" = xno], [AC_DEFINE(LGAMMA_R_M0_FIX)])
])
# Some platform need -lrt for clock_gettime, but the other don't.
if test x"$ac_cv_func_clock_gettime" != xyes; then
# glibc 2.17 moves clock_* functions from librt to the main C library.

2
math.c
View file

@ -750,7 +750,7 @@ ruby_tgamma(const double d)
#define tgamma(d) ruby_tgamma(d)
#endif
#if defined __APPLE__
#if defined LGAMMA_R_M0_FIX
static inline double
ruby_lgamma_r(const double d, int *sign)
{