add Patch0, fix nullptr-checks with GCC6 in YDialog

do not append '-fno-delete-null-pointer-checks' to %%optflags, keeping optimized performance

libyui-3.2.4-fix_werror_nonnull_compare_gcc6.patch

@@ -0,0 +1,53 @@
+From e49f4dde7351152908aaec18969789377f96f631 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Bj=C3=B6rn=20Esser?= <me@besser82.io>
+Date: Wed, 30 Mar 2016 09:12:04 +0200
+Subject: [PATCH] Fix 'Werror=nonnull-compare' for GCC 6 See: 
+ https://gcc.gnu.org/gcc-6/porting_to.html
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+    Optimizations remove null pointer checks for 'this'
+
+    …/src/YDialog.cc: In member function 'bool YDialog::destroy(bool)':
+    …/src/YDialog.cc:254:24: error:
+        nonnull argument 'this' compared to NULL [-Werror=nonnull-compare]
+     YUI_CHECK_WIDGET( this );
+               ~~~~~~~~~^~~~~~
+---
+ src/YUIException.h | 18 +++++++++++++++++-
+ 1 file changed, 17 insertions(+), 1 deletion(-)
+
+diff --git a/src/YUIException.h b/src/YUIException.h
+index f0dcb21..f87fa8b 100644
+--- a/src/YUIException.h
++++ b/src/YUIException.h
+@@ -172,11 +172,27 @@ class YWidget;
+ /**
+  * Check if a widget pointer is valid.
+  * Throws YUIInvalidWidgetException if it is 0 or invalid (already deleted).
++ *
++ * Explicitly casting the memory-address stored in the given pointer to
++ * a boolean-type for null-poiter-checks is needed for GCC >= 6, because
++ * it introduces new optimizations to remove null-pointer-checks for 'this'.
++ *
++ * Not explicitly casting the pointer's memory-address, will cause the
++ * compilation to fail with an error, when using this macro in YDialog:
++ *
++ *     …/src/YDialog.cc: In member function 'bool YDialog::destroy(bool)':
++ *     …/src/YDialog.cc:254:24: error:
++ *         nonnull argument 'this' compared to NULL [-Werror=nonnull-compare]
++ *     YUI_CHECK_WIDGET( this );
++ *               ~~~~~~~~~^~~~~~
++ *
++ * See: https://gcc.gnu.org/gcc-6/porting_to.html
+  **/
+ #define YUI_CHECK_WIDGET( WIDGET )			\
+     do							\
+     {							\
+-	if ( ! (WIDGET) || ! (WIDGET)->isValid() )	\
++	if ( ! ( static_cast<bool> (WIDGET) ) ||	\
++	     ! (WIDGET)->isValid() )			\
+ 	{						\
+ 	    YUI_THROW( YUIInvalidWidgetException() );	\
+ 	}						\

libyui.spec

@@ -14,20 +14,18 @@
 # CMake-builds go out-of-tree.
 %global _cmake_build_subdir build-%{?_arch}%{?dist}
 
-# Keep nullptr-checks with GCC6.
-%if 0%{?fedora} >= 24 || 0%{?rhel} >= 8
-%global optflags %(echo '%{optflags} -fno-delete-null-pointer-checks')
-%endif # 0%%{?fedora} >= 24 || 0%%{?rhel} >= 8
-
 Name:			lib%{libsuffix}
 Version:		3.2.4
-Release:		1%{?dist}
+Release:		2%{?dist}
 Summary:		GUI-abstraction library
 
 License:		(LGPLv2 or LGPLv3) and MIT
 URL:			https://github.com/%{name}/%{name}
 Source0:		%{url}/archive/%{name}/master/%{version}.tar.gz#/%{name}-%{version}.tar.gz
 
+# Submitted upstream: https://github.com/libyui/libyui/pull/97
+Patch0000:		https://github.com/besser82/libyui/commit/e49f4dde7351152908aaec18969789377f96f631.patch#/%{name}-3.2.4-fix_werror_nonnull_compare_gcc6.patch
+
 BuildRequires:		boost-devel
 BuildRequires:		cmake			>= 2.8
 
@@ -74,6 +72,7 @@ brief examples how to build a UI using %{name}.
 
 %prep
 %setup -qn %{name}-%{name}-master-%{version}
+%patch0000 -p1 -b .nonnull_compare_gcc6
 ./bootstrap.sh
 
 
@@ -143,6 +142,11 @@ popd
 
 
 %changelog
+* Wed Mar 30 2016 Björn Esser <fedora@besser82.io> - 3.2.4-2
+- add Patch0, fix nullptr-checks with GCC6 in YDialog
+- do not append '-fno-delete-null-pointer-checks' to %%optflags,
+  keeping optimized performance
+
 * Tue Mar 29 2016 Björn Esser <fedora@besser82.io> - 3.2.4-1
 - new upstream release
 - drop Patch1, applied in upstream tarball