From 04be8e84db1cf4f8b2a7bc7679eda4336da75d43 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Fri, 27 Aug 2021 10:52:02 +0900
Subject: Use C99-defined macros to classify a floating-point number

---
 configure.ac | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 341d535235..900967492d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -799,7 +799,7 @@ AS_IF([test "$GCC" = yes], [
       ])
     ],
     [cygwin*|msys*|darwin*|netbsd*], [
-      # need lgamma_r(), finite()
+      # need lgamma_r()
     ])
 
     # ANSI (no XCFLAGS because this is C only)
@@ -1906,9 +1906,7 @@ AC_REPLACE_FUNCS(strlcpy)
 AC_REPLACE_FUNCS(strstr)
 AC_REPLACE_FUNCS(tgamma)
 
-RUBY_REPLACE_FUNC([finite], [@%:@include <math.h>])
-RUBY_REPLACE_FUNC([isinf], [@%:@include <math.h>])
-RUBY_REPLACE_FUNC([isnan], [@%:@include <math.h>])
+AC_DEFINE(HAVE_ISFINITE)        # C99; backward compatibility
 
 # for missing/setproctitle.c
 AS_CASE(["$target_os"],
-- 
cgit v1.2.3