diff options
| author | mrkn <mrkn@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2010-04-14 09:29:29 +0000 |
|---|---|---|
| committer | mrkn <mrkn@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2010-04-14 09:29:29 +0000 |
| commit | 55f7857a7758102eb512eaa7aca3d2855fb797da (patch) | |
| tree | 4117b788a9b2f31127428be1f113b84341f3247b /configure.in | |
| parent | 8e7a682be04ac9060f1957ea12a84d2aeb7374c9 (diff) | |
* configure.in (signbit): signbit is a macro in C99.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27341 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/configure.in b/configure.in index fe7f8d2d32..e9116497c4 100644 --- a/configure.in +++ b/configure.in @@ -1116,8 +1116,19 @@ AS_CASE([$rb_cv_broken_glibc_ia64_erfc],[yes],[ac_cv_func_erf=no]) AC_REPLACE_FUNCS(dup2 memmove strerror\ strchr strstr crypt flock\ - isnan finite isinf hypot acosh erf tgamma lgamma_r cbrt signbit \ + isnan finite isinf hypot acosh erf tgamma lgamma_r cbrt \ strlcpy strlcat) +AC_CACHE_CHECK(for signbit, rb_cv_have_signbit, + [AC_TRY_COMPILE([ +#include <math.h> +], [int v = signbit(-0.0);], + rb_cv_have_signbit=yes, + rb_cv_have_signbit=no)]) +if test "$rb_cv_have_signbit" = yes; then + AC_DEFINE(HAVE_SIGNBIT) +else + AC_LIBOBJ([signbit]) +fi AC_CHECK_FUNCS(fmod killpg wait4 waitpid fork spawnv syscall chroot getcwd eaccess\ truncate ftruncate chsize times utimes utimensat fcntl lockf lstat\ link symlink readlink readdir_r fsync fdatasync\ |