[pkgsrc/trunk]: pkgsrc/x11/qt4-libs qt4-libs: fix build with gcc9

[markd <markd%pkgsrc.org@localhost>]

details:   https://anonhg.NetBSD.org/pkgsrc/rev/e39f84ed9471
branches:  trunk
changeset: 397770:e39f84ed9471
user:      markd <markd%pkgsrc.org@localhost>
date:      Wed Jul 03 10:04:23 2019 +0000

description:
qt4-libs: fix build with gcc9
from https://aur.archlinux.org/packages/qt4/

diffstat:

 x11/qt4-libs/distinfo                                   |   3 +-
 x11/qt4-libs/patches/patch-src_corelib_global_qglobal.h |  50 +++++++++++++++++
 2 files changed, 52 insertions(+), 1 deletions(-)

diffs (71 lines):

diff -r 0ad4c3ca25b2 -r e39f84ed9471 x11/qt4-libs/distinfo
--- a/x11/qt4-libs/distinfo     Wed Jul 03 09:06:37 2019 +0000
+++ b/x11/qt4-libs/distinfo     Wed Jul 03 10:04:23 2019 +0000
@@ -1,4 +1,4 @@
-$NetBSD: distinfo,v 1.114 2018/01/17 18:37:34 markd Exp $
+$NetBSD: distinfo,v 1.115 2019/07/03 10:04:23 markd Exp $
 
 SHA1 (qt-everywhere-opensource-src-4.8.7.tar.gz) = 76aef40335c0701e5be7bb3a9101df5d22fe3666
 RMD160 (qt-everywhere-opensource-src-4.8.7.tar.gz) = afb5e5a99388e6429faca59cb5000054feffd166
@@ -73,6 +73,7 @@
 SHA1 (patch-src_3rdparty_webkit_Source_WebCore_platform_graphics_filters_arm_FELightingNEON.cpp) = a0a3d9d066aa6ae3c42cee198287b10e46e7f25d
 SHA1 (patch-src_3rdparty_webkit_Source_WebCore_platform_qt_PlatformKeyboardEventQt.cpp) = b28cf71983f8e71b82b1c634a10b3898ca13ede5
 SHA1 (patch-src_3rdparty_webkit_Source_WebKit2_DerivedSources.pro) = 7ae5feb79efd0836b74000e183b96f5775fd3043
+SHA1 (patch-src_corelib_global_qglobal.h) = 508cc9ae19eaa3144bfd676822a22add6a2e4127
 SHA1 (patch-src_corelib_io_io.pri) = cde98927b524c92fae1e053c2359e77bde2c240a
 SHA1 (patch-src_corelib_io_qfilesystemwatcher.cpp) = bb16b95d20286b1aa069dc25843d7e0067cc0268
 SHA1 (patch-src_corelib_thread_qthread__unix.cpp) = 67fbdc29d6da0aa7309a7aeb653a5abf10bd4d78
diff -r 0ad4c3ca25b2 -r e39f84ed9471 x11/qt4-libs/patches/patch-src_corelib_global_qglobal.h
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/x11/qt4-libs/patches/patch-src_corelib_global_qglobal.h   Wed Jul 03 10:04:23 2019 +0000
@@ -0,0 +1,50 @@
+$NetBSD: patch-src_corelib_global_qglobal.h,v 1.1 2019/07/03 10:04:24 markd Exp $
+
+Fix for gcc9
+
+--- src/corelib/global/qglobal.h       2015-05-07 17:14:48.000000000 +0300
++++ src/corelib/global/qglobal.h       2019-05-28 20:04:15.689744432 +0300
+@@ -2480,26 +2480,35 @@
+ typedef uint Flags;
+ #define Q_DECLARE_OPERATORS_FOR_FLAGS(Flags)
+ 
+ #endif /* Q_NO_TYPESAFE_FLAGS */
+ 
+-#if defined(Q_CC_GNU) && !defined(Q_CC_INTEL) && !defined(Q_CC_RVCT)
++#if defined(Q_CC_GNU) && !defined(Q_CC_RVCT)
+ /* make use of typeof-extension */
+ template <typename T>
+ class QForeachContainer {
+ public:
+-    inline QForeachContainer(const T& t) : c(t), brk(0), i(c.begin()), e(c.end()) { }
++    inline QForeachContainer(const T& t) : c(t), i(c.begin()), e(c.end()), control(1) { }
+     const T c;
+-    int brk;
+     typename T::const_iterator i, e;
++    int control;
+ };
+ 
+-#define Q_FOREACH(variable, container)                                \
+-for (QForeachContainer<__typeof__(container)> _container_(container); \
+-     !_container_.brk && _container_.i != _container_.e;              \
+-     __extension__  ({ ++_container_.brk; ++_container_.i; }))                       \
+-    for (variable = *_container_.i;; __extension__ ({--_container_.brk; break;}))
++// Explanation of the control word:
++//  - it's initialized to 1
++//  - that means both the inner and outer loops start
++//  - if there were no breaks, at the end of the inner loop, it's set to 0, which
++//    causes it to exit (the inner loop is run exactly once)
++//  - at the end of the outer loop, it's inverted, so it becomes 1 again, allowing
++//    the outer loop to continue executing
++//  - if there was a break inside the inner loop, it will exit with control still
++//    set to 1; in that case, the outer loop will invert it to 0 and will exit too
++#define Q_FOREACH(variable, container)                                  \
++for (QForeachContainer<__typeof__(container)> _container_(container);   \
++     _container_.control && _container_.i != _container_.e;             \
++     ++_container_.i, _container_.control ^= 1)                         \
++for (variable = *_container_.i; _container_.control; _container_.control = 0)
+ 
+ #else
+ 
+ struct QForeachContainerBase {};
+