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* missing/isnan.c (isnan): Don't define if isnan() macro is defined.

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This fixes a compilation failure on uClibc based Gentoo system.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40422 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
akr 2013-04-23 11:27:07 +00:00
parent e5ce9579ec
commit bac8fa5f9d
2 changed files with 20 additions and 0 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
Tue Apr 23 20:10:02 2013 Tanaka Akira <akr@fsij.org>
* missing/isnan.c (isnan): Don't define if isnan() macro is defined.
This fixes a compilation failure on uClibc based Gentoo system.
Tue Apr 23 17:40:40 2013 Martin Duerst <duerst@it.aoyama.ac.jp> Tue Apr 23 17:40:40 2013 Martin Duerst <duerst@it.aoyama.ac.jp>
* lib/rexml/document.rb, lib/rexml/element.rb, * lib/rexml/document.rb, lib/rexml/element.rb,

15
missing/isnan.c
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@ -2,6 +2,20 @@
#include "ruby/missing.h" #include "ruby/missing.h"
/*
* isnan() may be a macro, a function or both.
* (The C99 standard defines that isnan() is a macro, though.)
* http://www.gnu.org/software/automake/manual/autoconf/Function-Portability.html
*
* macro only: uClibc
* both: GNU libc
*
* This file is compile if no isnan() function is available.
* (autoconf AC_REPLACE_FUNCS detects only the function.)
* The macro is detected by following #ifndef.
*/
#ifndef isnan
static int double_ne(double n1, double n2); static int double_ne(double n1, double n2);
int int
@ -15,3 +29,4 @@ double_ne(double n1, double n2)
{ {
return n1 != n2; return n1 != n2;
} }
#endif