Add patch to conditionalize a fix for an old and long fixed bug

in libcrypt / glibc (rhbz#1536752)

perl-5.26.1-guard_old_libcrypt_fix.patch

@@ -0,0 +1,24 @@
+commit 13e70b397dcb0d1bf4a869b670f041c1d7b730d0
+Author: Björn Esser <besser82@fedoraproject.org>
+Date:   Sat Jan 20 20:22:53 2018 +0100
+
+    pp: Guard fix for really old bug in glibc libcrypt
+
+diff --git a/pp.c b/pp.c
+index d50ad7ddbf..6510c7b15c 100644
+--- a/pp.c
++++ b/pp.c
+@@ -3650,8 +3650,12 @@ PP(pp_crypt)
+ #if defined(__GLIBC__) || defined(__EMX__)
+ 	if (PL_reentrant_buffer->_crypt_struct_buffer) {
+ 	    PL_reentrant_buffer->_crypt_struct_buffer->initialized = 0;
+-	    /* work around glibc-2.2.5 bug */
++#if (defined(__GLIBC__) && __GLIBC__ == 2) && \
++    (defined(__GLIBC_MINOR__) && __GLIBC_MINOR__ >= 2 && __GLIBC_MINOR__ < 4)
++	    /* work around glibc-2.2.5 bug, has been fixed at some
++	     * time in glibc-2.3.X */
+ 	    PL_reentrant_buffer->_crypt_struct_buffer->current_saltbits = 0;
++#endif
+ 	}
+ #endif
+     }

perl.spec

@@ -79,7 +79,7 @@ License:        GPL+ or Artistic
 Epoch:          %{perl_epoch}
 Version:        %{perl_version}
 # release number must be even higher, because dual-lived modules will be broken otherwise
-Release:        403%{?dist}
+Release:        404%{?dist}
 Summary:        Practical Extraction and Report Language
 Url:            http://www.perl.org/
 Source0:        http://www.cpan.org/src/5.0/perl-%{perl_version}.tar.bz2
@@ -263,6 +263,10 @@ Patch200:       perl-5.16.3-Link-XS-modules-to-libperl.so-with-EU-CBuilder-on-Li
 # Link XS modules to libperl.so with EU::MM on Linux, bug #960048
 Patch201:       perl-5.16.3-Link-XS-modules-to-libperl.so-with-EU-MM-on-Linux.patch
 
+# Conditionalize a fix for an old and long fixed bug
+# in libcrypt / glibc, rhbz#1536752
+Patch202:       perl-5.26.1-guard_old_libcrypt_fix.patch
+
 # Update some of the bundled modules
 # see http://fedoraproject.org/wiki/Perl/perl.spec for instructions
 
@@ -2851,6 +2855,7 @@ Perl extension for Version Objects
 %patch77 -p1
 %patch200 -p1
 %patch201 -p1
+%patch202 -p1
 
 %if !%{defined perl_bootstrap}
 # Local patch tracking
@@ -5180,6 +5185,10 @@ popd
 
 # Old changelog entries are preserved in CVS.
 %changelog
+* Sat Jan 20 2018 Björn Esser <besser82@fedoraproject.org> - 4:5.26.1-404
+- Add patch to conditionalize a fix for an old and long fixed bug
+  in libcrypt / glibc (rhbz#1536752)
+
 * Mon Jan 15 2018 Petr Pisar <ppisar@redhat.com> - 4:5.26.1-403
 - Rebuild against glibc without nsl library