diff --git a/ruby-2.3.1-Rely-on-ldd-to-detect-glibc.patch b/ruby-2.3.1-Rely-on-ldd-to-detect-glibc.patch
new file mode 100644
index 0000000..8765d2a
--- /dev/null
+++ b/ruby-2.3.1-Rely-on-ldd-to-detect-glibc.patch
@@ -0,0 +1,119 @@
+From 346e147ba6480839b87046e9a9efab0bf6ed3660 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?V=C3=ADt=20Ondruch?= <vondruch@redhat.com>
+Date: Wed, 10 Aug 2016 17:35:48 +0200
+Subject: [PATCH] Rely on ldd to detect glibc.
+
+This is just workaround, since we know we are quite sure this will be successful
+on Red Hat platforms.
+
+This workaround rhbz#1361037
+---
+ test/fiddle/helper.rb | 92 ---------------------------------------------------
+ 1 file changed, 92 deletions(-)
+
+diff --git a/test/fiddle/helper.rb b/test/fiddle/helper.rb
+index 1da3d93..65148a1 100644
+--- a/test/fiddle/helper.rb
++++ b/test/fiddle/helper.rb
+@@ -6,98 +6,6 @@
+ 
+ libc_so = libm_so = nil
+ 
+-case RUBY_PLATFORM
+-when /cygwin/
+-  libc_so = "cygwin1.dll"
+-  libm_so = "cygwin1.dll"
+-when /x86_64-linux/
+-  libc_so = "/lib64/libc.so.6"
+-  libm_so = "/lib64/libm.so.6"
+-when /linux/
+-  libdir = '/lib'
+-  case [0].pack('L!').size
+-  when 4
+-    # 32-bit ruby
+-    libdir = '/lib32' if File.directory? '/lib32'
+-  when 8
+-    # 64-bit ruby
+-    libdir = '/lib64' if File.directory? '/lib64'
+-  end
+-  libc_so = File.join(libdir, "libc.so.6")
+-  libm_so = File.join(libdir, "libm.so.6")
+-when /mingw/, /mswin/
+-  require "rbconfig"
+-  crtname = RbConfig::CONFIG["RUBY_SO_NAME"][/msvc\w+/] || 'ucrtbase'
+-  libc_so = libm_so = "#{crtname}.dll"
+-when /darwin/
+-  libc_so = "/usr/lib/libc.dylib"
+-  libm_so = "/usr/lib/libm.dylib"
+-when /kfreebsd/
+-  libc_so = "/lib/libc.so.0.1"
+-  libm_so = "/lib/libm.so.1"
+-when /gnu/	#GNU/Hurd
+-  libc_so = "/lib/libc.so.0.3"
+-  libm_so = "/lib/libm.so.6"
+-when /mirbsd/
+-  libc_so = "/usr/lib/libc.so.41.10"
+-  libm_so = "/usr/lib/libm.so.7.0"
+-when /freebsd/
+-  libc_so = "/lib/libc.so.7"
+-  libm_so = "/lib/libm.so.5"
+-when /bsd|dragonfly/
+-  libc_so = "/usr/lib/libc.so"
+-  libm_so = "/usr/lib/libm.so"
+-when /solaris/
+-  libdir = '/lib'
+-  case [0].pack('L!').size
+-  when 4
+-    # 32-bit ruby
+-    libdir = '/lib' if File.directory? '/lib'
+-  when 8
+-    # 64-bit ruby
+-    libdir = '/lib/64' if File.directory? '/lib/64'
+-  end
+-  libc_so = File.join(libdir, "libc.so")
+-  libm_so = File.join(libdir, "libm.so")
+-when /aix/
+-  pwd=Dir.pwd
+-  libc_so = libm_so = "#{pwd}/libaixdltest.so"
+-  unless File.exist? libc_so
+-    cobjs=%w!strcpy.o!
+-    mobjs=%w!floats.o sin.o!
+-    funcs=%w!sin sinf strcpy strncpy!
+-    expfile='dltest.exp'
+-    require 'tmpdir'
+-    Dir.mktmpdir do |dir|
+-      begin
+-        Dir.chdir dir
+-        %x!/usr/bin/ar x /usr/lib/libc.a #{cobjs.join(' ')}!
+-        %x!/usr/bin/ar x /usr/lib/libm.a #{mobjs.join(' ')}!
+-        %x!echo "#{funcs.join("\n")}\n" > #{expfile}!
+-        require 'rbconfig'
+-        if RbConfig::CONFIG["GCC"] = 'yes'
+-          lflag='-Wl,'
+-        else
+-          lflag=''
+-        end
+-        flags="#{lflag}-bE:#{expfile} #{lflag}-bnoentry -lm"
+-        %x!#{RbConfig::CONFIG["LDSHARED"]} -o #{libc_so} #{(cobjs+mobjs).join(' ')} #{flags}!
+-      ensure
+-        Dir.chdir pwd
+-      end
+-    end
+-  end
+-else
+-  libc_so = ARGV[0] if ARGV[0] && ARGV[0][0] == ?/
+-  libm_so = ARGV[1] if ARGV[1] && ARGV[1][0] == ?/
+-  if( !(libc_so && libm_so) )
+-    $stderr.puts("libc and libm not found: #{$0} <libc> <libm>")
+-  end
+-end
+-
+-libc_so = nil if !libc_so || (libc_so[0] == ?/ && !File.file?(libc_so))
+-libm_so = nil if !libm_so || (libm_so[0] == ?/ && !File.file?(libm_so))
+-
+ if !libc_so || !libm_so
+   ruby = EnvUtil.rubybin
+   ldd = `ldd #{ruby}`
+-- 
+2.9.2
+
diff --git a/ruby.spec b/ruby.spec
index e75c0c8..829f506 100644
--- a/ruby.spec
+++ b/ruby.spec
@@ -21,7 +21,7 @@
 %endif
 
 
-%global release 57
+%global release 58
 %{!?release_string:%global release_string %{?development_release:0.}%{release}%{?development_release:.%{development_release}}%{?dist}}
 
 # The RubyGems library has to stay out of Ruby directory three, since the
@@ -125,6 +125,10 @@ Patch7: ruby-2.2.3-Generate-preludes-using-miniruby.patch
 # Prevent test failures on ARM.
 # https://bugs.ruby-lang.org/issues/12331
 Patch8: ruby-2.4.0-increase-timeout-for-ARMv7.patch
+# Workaround "an invalid stdio handle" error on PPC, due to recently introduced
+# hardening features of glibc (rhbz#1361037).
+# https://bugs.ruby-lang.org/issues/12666
+Patch9: ruby-2.3.1-Rely-on-ldd-to-detect-glibc.patch
 
 Requires: %{name}-libs%{?_isa} = %{version}-%{release}
 Suggests: rubypick
@@ -473,6 +477,7 @@ rm -rf ext/fiddle/libffi*
 %patch6 -p1
 %patch7 -p1
 %patch8 -p1
+%patch9 -p1
 
 # Provide an example of usage of the tapset:
 cp -a %{SOURCE3} .
@@ -958,6 +963,9 @@ make check TESTS="-v $DISABLE_TESTS"
 %{ruby_libdir}/tkextlib
 
 %changelog
+* Wed Aug 10 2016 Vít Ondruch <vondruch@redhat.com> - 2.3.1-58
+- Workaround "an invalid stdio handle" error on PPC (rhbz#1361037).
+
 * Tue Jul 12 2016 Vít Ondruch <vondruch@redhat.com> - 2.3.1-57
 - Make symlinks for json gem.