diff --git a/lang/ruby/patches/001_fix_isnan_isinf_finite_with_uclibc.patch b/lang/ruby/patches/001_fix_isnan_isinf_finite_with_uclibc.patch
new file mode 100644
index 0000000000..de3170d09b
--- /dev/null
+++ b/lang/ruby/patches/001_fix_isnan_isinf_finite_with_uclibc.patch
@@ -0,0 +1,98 @@
+Backported to 2.5.3
+
+From 74f94b3e6ebf15b76f3b357e754095412b006e94 Mon Sep 17 00:00:00 2001
+From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+Date: Fri, 8 Feb 2019 07:22:55 +0000
+Subject: [PATCH] configure.ac: check finite,isinf,isnan as macros first
+
+[ruby-core:91487] [Bug #15595]
+
+git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67036 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
+---
+ aclocal.m4                    |  1 +
+ configure.ac                  | 13 ++++---------
+ tool/m4/ruby_replace_funcs.m4 | 13 +++++++++++++
+ 3 files changed, 18 insertions(+), 9 deletions(-)
+ create mode 100644 tool/m4/ruby_replace_funcs.m4
+
+--- a/configure.ac
++++ b/configure.ac
+@@ -1189,9 +1189,6 @@ main()
+ 		ac_cv_func_fsync=yes
+ 		ac_cv_func_seekdir=yes
+ 		ac_cv_func_telldir=yes
+-		ac_cv_func_isinf=yes
+-		ac_cv_func_isnan=yes
+-		ac_cv_func_finite=yes
+ 		ac_cv_func_lchown=yes
+ 		ac_cv_func_link=yes
+ 		ac_cv_func_readlink=yes
+@@ -1239,9 +1236,6 @@ main()
+ [netbsd*], [	LIBS="-lm $LIBS"
+ 		],
+ [dragonfly*], [	LIBS="-lm $LIBS"
+-		# isinf() and isnan() are macros on DragonFly.
+-		ac_cv_func_isinf=yes
+-		ac_cv_func_isnan=yes
+ 		],
+ [aix*],[	LIBS="-lm $LIBS"
+ 		ac_cv_func_round=no
+@@ -2212,11 +2206,8 @@ AC_REPLACE_FUNCS(dup2)
+ AC_REPLACE_FUNCS(erf)
+ AC_REPLACE_FUNCS(explicit_bzero)
+ AC_REPLACE_FUNCS(ffs)
+-AC_REPLACE_FUNCS(finite)
+ AC_REPLACE_FUNCS(flock)
+ AC_REPLACE_FUNCS(hypot)
+-AC_REPLACE_FUNCS(isinf)
+-AC_REPLACE_FUNCS(isnan)
+ AC_REPLACE_FUNCS(lgamma_r)
+ AC_REPLACE_FUNCS(memmove)
+ AC_REPLACE_FUNCS(nextafter)
+@@ -2228,6 +2219,10 @@ AC_REPLACE_FUNCS(strlcpy)
+ AC_REPLACE_FUNCS(strstr)
+ AC_REPLACE_FUNCS(tgamma)
+ 
++RUBY_REPLACE_FUNC([finite], [@%:@include <math.h>])
++RUBY_REPLACE_FUNC([isinf], [@%:@include <math.h>])
++RUBY_REPLACE_FUNC([isnan], [@%:@include <math.h>])
++
+ # for missing/setproctitle.c
+ AS_CASE(["$target_os"],
+ [aix* | k*bsd*-gnu | kopensolaris*-gnu | linux* | darwin*], [AC_DEFINE(SPT_TYPE,SPT_REUSEARGV)],
+--- /dev/null
++++ b/tool/m4/ruby_replace_funcs.m4
+@@ -0,0 +1,13 @@
++# -*- Autoconf -*-
++dnl RUBY_REPLACE_FUNC [func] [included]
++AC_DEFUN([RUBY_REPLACE_FUNC], [dnl
++    AC_CHECK_DECL([$1],dnl
++        [AC_DEFINE(AS_TR_CPP(HAVE_[$1]))],dnl
++        [AC_REPLACE_FUNCS($1)],dnl
++        [$2])dnl
++])
++
++dnl RUBY_REPLACE_FUNCS [funcs] [included]
++AC_DEFUN([RUBY_REPLACE_FUNCS] [dnl
++    m4_map_args_w([$1], [RUBY_REPLACE_FUNC(], [), [$2]])dnl
++])
+--- a/acinclude.m4
++++ b/acinclude.m4
+@@ -44,3 +44,17 @@ AC_DEFUN([AC_MSG_RESULT], [dnl
+ { _AS_ECHO_LOG([result: $1])
+ COLORIZE_RESULT([$1]); dnl
+ }])
++
++# -*- Autoconf -*-
++dnl RUBY_REPLACE_FUNC [func] [included]
++AC_DEFUN([RUBY_REPLACE_FUNC], [dnl
++    AC_CHECK_DECL([$1],dnl
++        [AC_DEFINE(AS_TR_CPP(HAVE_[$1]))],dnl
++        [AC_REPLACE_FUNCS($1)],dnl
++        [$2])dnl
++])
++
++dnl RUBY_REPLACE_FUNCS [funcs] [included]
++AC_DEFUN([RUBY_REPLACE_FUNCS] [dnl
++    m4_map_args_w([$1], [RUBY_REPLACE_FUNC(], [), [$2]])dnl
++])