libtasn1: Backport compiler warning fixes

These patches are backported from master to fix issues raised by clang
compiler.

(From OE-Core rev: 6e3ff002e1a24936acb20dd209ea758c065cc16a)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-support/gnutls/libtasn1/0001-configure-don-t-add-Werror-to-build-flags.patch

@@ -0,0 +1,28 @@
+From 908e9fa4c1172f09e0e45420a403dc25ed0a466c Mon Sep 17 00:00:00 2001
+From: Nikos Mavrogiannopoulos <nmav@redhat.com>
+Date: Tue, 26 Jul 2016 08:45:33 +0200
+Subject: [PATCH 1/4] configure: don't add -Werror to build flags
+
+---
+Upstream-Status: Backport
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+ configure.ac | 2 --
+ 1 file changed, 2 deletions(-)
+
+diff --git a/configure.ac b/configure.ac
+index 7a14e04..066f5fe 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -70,8 +70,6 @@ AC_ARG_ENABLE([gcc-warnings],
+ )
+ 
+ if test "$gl_gcc_warnings" = yes; then
+-  gl_WARN_ADD([-Werror], [WERROR_CFLAGS])
+-
+   nw="$nw -Wsystem-headers"         # Don't let system headers trigger warnings
+   nw="$nw -Wc++-compat"             # We don't care strongly about C++ compilers
+   nw="$nw -Wtraditional"            # Warns on #elif which we use often
+-- 
+1.9.1
+

meta/recipes-support/gnutls/libtasn1/0002-ASN.y-corrected-compiler-warning.patch

@@ -0,0 +1,28 @@
+From 3542c01618fcde83b29640ea2c60bfd2629ae0b7 Mon Sep 17 00:00:00 2001
+From: Nikos Mavrogiannopoulos <nmav@redhat.com>
+Date: Tue, 26 Jul 2016 08:47:49 +0200
+Subject: [PATCH 2/4] ASN.y: corrected compiler warning
+
+---
+Upstream-Status: Backport
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+ lib/ASN1.y | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/lib/ASN1.y b/lib/ASN1.y
+index 731415d..6db638f 100644
+--- a/lib/ASN1.y
++++ b/lib/ASN1.y
+@@ -621,7 +621,7 @@ _asn1_create_errorDescription (int error, char *error_desc)
+     case ASN1_NAME_TOO_LONG:
+       snprintf (error_desc, ASN1_MAX_ERROR_DESCRIPTION_SIZE,
+                 "%s:%u: name too long (more than %u characters)", file_name,
+-                line_number, ASN1_MAX_NAME_SIZE);
++                line_number, (unsigned)ASN1_MAX_NAME_SIZE);
+       break;
+     case ASN1_IDENTIFIER_NOT_FOUND:
+       snprintf (error_desc, ASN1_MAX_ERROR_DESCRIPTION_SIZE,
+-- 
+1.9.1
+

meta/recipes-support/gnutls/libtasn1/0003-parser_aux-corrected-potential-null-pointer-derefere.patch

@@ -0,0 +1,73 @@
+From c8903aa27dc9de1d9efeed9d1f7894f1019548f7 Mon Sep 17 00:00:00 2001
+From: Nikos Mavrogiannopoulos <nmav@redhat.com>
+Date: Tue, 26 Jul 2016 08:49:15 +0200
+Subject: [PATCH 3/4] parser_aux: corrected potential null pointer dereferences
+
+---
+Upstream-Status: Backport
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+ lib/parser_aux.c | 12 ++++++------
+ 1 file changed, 6 insertions(+), 6 deletions(-)
+
+diff --git a/lib/parser_aux.c b/lib/parser_aux.c
+index 2285b20..12ee16f 100644
+--- a/lib/parser_aux.c
++++ b/lib/parser_aux.c
+@@ -637,7 +637,7 @@ _asn1_change_integer_value (asn1_node node)
+ 		      p = NULL;
+ 		      break;
+ 		    }
+-		  if (p->right)
++		  if (p && p->right)
+ 		    {
+ 		      p = p->right;
+ 		      break;
+@@ -753,7 +753,7 @@ _asn1_expand_object_id (asn1_node node)
+ 
+       if (move == RIGHT)
+ 	{
+-	  if (p->right)
++	  if (p && p->right)
+ 	    p = p->right;
+ 	  else
+ 	    move = UP;
+@@ -828,7 +828,7 @@ _asn1_expand_object_id (asn1_node node)
+ 
+       if (move == RIGHT)
+ 	{
+-	  if (p->right)
++	  if (p && p->right)
+ 	    p = p->right;
+ 	  else
+ 	    move = UP;
+@@ -898,7 +898,7 @@ _asn1_type_set_config (asn1_node node)
+ 
+       if (move == RIGHT)
+ 	{
+-	  if (p->right)
++	  if (p && p->right)
+ 	    p = p->right;
+ 	  else
+ 	    move = UP;
+@@ -1007,7 +1007,7 @@ _asn1_check_identifier (asn1_node node)
+ 		  p = NULL;
+ 		  break;
+ 		}
+-	      if (p->right)
++	      if (p && p->right)
+ 		{
+ 		  p = p->right;
+ 		  break;
+@@ -1067,7 +1067,7 @@ _asn1_set_default_tag (asn1_node node)
+ 		  p = NULL;
+ 		  break;
+ 		}
+-	      if (p->right)
++	      if (p && p->right)
+ 		{
+ 		  p = p->right;
+ 		  break;
+-- 
+1.9.1
+

meta/recipes-support/gnutls/libtasn1/0004-tools-eliminated-compiler-warnings.patch

@@ -0,0 +1,56 @@
+From d647bb2fa1bd288a6ac02c18318f3cba2a34c3a0 Mon Sep 17 00:00:00 2001
+From: Nikos Mavrogiannopoulos <nmav@redhat.com>
+Date: Tue, 26 Jul 2016 08:50:24 +0200
+Subject: [PATCH 4/4] tools: eliminated compiler warnings
+
+---
+Upstream-Status: Backport
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+ src/asn1Coding.c   | 2 +-
+ src/asn1Decoding.c | 2 +-
+ src/asn1Parser.c   | 2 +-
+ 3 files changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/src/asn1Coding.c b/src/asn1Coding.c
+index d4df593..b516bfe 100644
+--- a/src/asn1Coding.c
++++ b/src/asn1Coding.c
+@@ -188,7 +188,7 @@ main (int argc, char *argv[])
+ 	default:
+ 	  fprintf (stderr,
+ 		   "asn1Coding: ?? getopt returned character code Ox%x ??\n",
+-		   option_result);
++		   (unsigned)option_result);
+ 	}
+     }
+ 
+diff --git a/src/asn1Decoding.c b/src/asn1Decoding.c
+index 078963e..20f91ac 100644
+--- a/src/asn1Decoding.c
++++ b/src/asn1Decoding.c
+@@ -131,7 +131,7 @@ main (int argc, char *argv[])
+ 	default:
+ 	  fprintf (stderr,
+ 		   "asn1Decoding: ?? getopt returned character code Ox%x ??\n",
+-		   option_result);
++		   (unsigned)option_result);
+ 	}
+     }
+ 
+diff --git a/src/asn1Parser.c b/src/asn1Parser.c
+index 7a3ae67..475bfc9 100644
+--- a/src/asn1Parser.c
++++ b/src/asn1Parser.c
+@@ -139,7 +139,7 @@ main (int argc, char *argv[])
+ 	default:
+ 	  fprintf (stderr,
+ 		   "asn1Parser: ?? getopt returned character code Ox%x ??\n",
+-		   option_result);
++		   (unsigned)option_result);
+ 	}
+ 
+     }
+-- 
+1.9.1
+

meta/recipes-support/gnutls/libtasn1_4.9.bb

@@ -10,6 +10,10 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=d32239bcb673463ab874e80d47fae504 \
 
 SRC_URI = "${GNU_MIRROR}/libtasn1/libtasn1-${PV}.tar.gz \
            file://dont-depend-on-help2man.patch \
+           file://0001-configure-don-t-add-Werror-to-build-flags.patch \
+           file://0002-ASN.y-corrected-compiler-warning.patch \
+           file://0003-parser_aux-corrected-potential-null-pointer-derefere.patch \
+           file://0004-tools-eliminated-compiler-warnings.patch \
            "
 
 SRC_URI[md5sum] = "3018d0f466a32b66dde41bb122e6cab6"