Add tcsh-6.19.00-gcc5-calloc.patch for gcc5 build

tcsh-6.19.00-gcc5-calloc.patch

@@ -0,0 +1,18 @@
+diff --git a/tc.alloc.c b/tc.alloc.c
+index b87f9e9..06e0405 100644
+--- a/tc.alloc.c
++++ b/tc.alloc.c
+@@ -348,10 +348,12 @@ calloc(size_t i, size_t j)
+ {
+ #ifndef lint
+     char *cp;
++    volatile size_t k;
+ 
+     i *= j;
+     cp = xmalloc(i);
+-    memset(cp, 0, i);
++    k = i;
++    memset(cp, 0, k);
+ 
+     return ((memalign_t) cp);
+ #else

tcsh.spec

@@ -1,7 +1,7 @@
 Summary: An enhanced version of csh, the C shell
 Name: tcsh
 Version: 6.19.00
-Release: 1%{?dist}
+Release: 2%{?dist}
 License: BSD
 Group: System Environment/Shells
 Source: ftp://ftp.astron.com/pub/tcsh/%{name}-%{version}.tar.gz
@@ -18,6 +18,8 @@ Patch11: tcsh-6.14.00-order.patch
 Patch35: tcsh-6.18.01-elf-interpreter.patch
 Patch36: tcsh-6.18.01-introduce-tcsh_posix_status.patch
 Patch38: tcsh-6.18.01-skip-tty-tests.patch
+# Proposed upstream - http://mx.gw.com/pipermail/tcsh-bugs/2015-May/000944.html
+Patch39: tcsh-6.19.00-gcc5-calloc.patch
 
 Provides: csh = %{version}
 Provides: /bin/tcsh, /bin/csh
@@ -121,6 +123,10 @@ fi
 
 
 %changelog
+* Thu May 28 2015 Fridolin Pokorny <fpokorny@redhat.com> - 6.19.00-02
+- Add tcsh-6.19.00-gcc5-calloc.patch to avoid crashes and infinite loops due to
+  gcc-5 malloc+memset optimization.
+
 * Wed May 27 2015 Fridolin Pokorny <fpokorny@redhat.com> - 6.19.00-01
 - Update to tcsh-6.19.00
 - Drop tcsh-6.14.00-tinfo.patch, not used anymore