[Buildroot] [git commit branch/2019.02.x] package/qt5/qt5base: fix icu detection in Qt 5.6.3

[Buildroot] [git commit branch/2019.02.x] package/qt5/qt5base: fix icu detection in Qt 5.6.3

[Peter Korsgaard]

commit: https://git.buildroot.net/buildroot/commit/?id=15a0bb579fa3b9719f4e37c5391a8dea46d8248e
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/2019.02.x

icu is required to build Q5tWebkit.
When UChar is defined as char16_t in ICU, then qtbase fails to detect ICU.
The issue is described https://bugreports.qt.io/browse/QTBUG-49586

Build fails with following error messages:
...
ustring.h:473:20: error: ???UChar??? does not name a type
 u_strCompare(const UChar *s1, int32_t length1,
                    ^
          ^
make[2]: *** [Makefile:195: icu.o] Error 1
ICU disabled.
The ICU library support cannot be enabled.

Signed-off-by: Andrey Skvortsov <andrej.skvortzov@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 89a82e7210874271d82a255ae7c2ded65b900ff7)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
---
 .../5.6.3/0004-fix-icu-build-for-qt5webkit.patch   | 74 ++++++++++++++++++++++
 1 file changed, 74 insertions(+)

diff --git a/package/qt5/qt5base/5.6.3/0004-fix-icu-build-for-qt5webkit.patch b/package/qt5/qt5base/5.6.3/0004-fix-icu-build-for-qt5webkit.patch
new file mode 100644
index 0000000000..0d166b848a
--- /dev/null
+++ b/package/qt5/qt5base/5.6.3/0004-fix-icu-build-for-qt5webkit.patch
@@ -0,0 +1,74 @@
+From: Arfrever Frehtes Taifersar Arahesis <Arfrever@Apache.Org>
+Date: Mon, 23 Nov 2015 03:54:00 +0000
+Subject: [PATCH 1/1] When UChar is defined as char16_t in ICU, then qtbase fails to detect ICU.
+
+Build fails with following error:
+
+ICU auto-detection... ()
+x86_64-pc-linux-gnu-g++ -c -march=core2 -O2 -fno-ident \
+ -frecord-gcc-switches -pipe -Wall -O2 -Wall -W -fPIC  -I. \
+ -I/var/tmp/portage/dev-qt/qtcore-5.5.1/work/qtbase-opensource-src-5.5.1/mkspecs/linux-g++ -o icu.o icu.cpp
+In file included from /usr/include/unicode/utypes.h:36:0,
+                 from icu.cpp:34:
+/usr/include/unicode/umachine.h:306:13: error: 'char16_t' does not name a type
+     typedef char16_t UChar;
+             ^
+In file included from /usr/include/unicode/utypes.h:37:0,
+                 from icu.cpp:34:
+/usr/include/unicode/uversion.h:165:55: error: 'UChar' does not name a type
+ u_versionFromUString(UVersionInfo versionArray, const UChar *versionString);
+                                                       ^
+...
+Makefile:177: recipe for target 'icu.o' failed
+gmake: *** [icu.o] Error 1
+ICU disabled.
+The ICU library support cannot be enabled.
+
+This change isn't needed for new Qt versions, because c++11 is mandatory since 5.7.
+Upstream desided not to merge this change into old branches, like 5.6.
+Original patch was slightly modified to apply cleanly on Qt 5.6.3.
+
+Fetch from: https://bugreports.qt.io/secure/attachment/52478/qtbase-5.5.1-icu.patch
+Signed-off-by: Arfrever Frehtes Taifersar Arahesis <Arfrever@Apache.Org>
+Signed-off-by: Andrey Skvortsov <andrej.skvortzov@gmail.com>
+
+---
+diff -purN qt5base-5.6.3.orig/config.tests/unix/compile.test qt5base-5.6.3/config.tests/unix/compile.test
+--- qt5base-5.6.3.orig/config.tests/unix/compile.test	2019-08-11 00:35:33.181545706 +0300
++++ qt5base-5.6.3/config.tests/unix/compile.test	2017-09-06 15:13:54.000000000 +0300
+@@ -47,7 +47,7 @@ while [ "$#" -gt 0 ]; do
+         INC=`echo $PARAM | sed -e 's/^-I//'`
+         INCLUDEPATH="$INCLUDEPATH \"$INC\""
+         ;;
+-    -f*|-D*)
++    -f*|-D*|-std=*)
+         CFLAGS="$CFLAGS \"$PARAM\""
+         CXXFLAGS="$CXXFLAGS \"$PARAM\""
+         ;;
+diff -purN qt5base-5.6.3.orig/configure qt5base-5.6.3/configure
+--- qt5base-5.6.3.orig/configure	2019-08-11 00:57:45.488214036 +0300
++++ qt5base-5.6.3/configure	2017-09-06 15:13:54.000000000 +0300
+@@ -5183,8 +5183,10 @@ fi
+ 
+ # auto-detect libicu support
+ if [ "$CFG_ICU" != "no" ]; then
+-    if compileTest unix/icu "ICU"; then
++    QT_CXXFLAGS_ICU=`icu-config --cxxflags 2>/dev/null`
++    if compileTest unix/icu "ICU" $QT_CXXFLAGS_ICU; then
+         [ "$CFG_ICU" = "auto" ] && CFG_ICU=yes
++        QMakeVar set QT_CXXFLAGS_ICU "$QT_CXXFLAGS_ICU"
+     else
+         if [ "$CFG_ICU" = "auto" ]; then
+             CFG_ICU=no
+diff -purN qt5base-5.6.3.orig/doc/Makefile qt5base-5.6.3/doc/Makefile
+diff -purN qt5base-5.6.3.orig/src/corelib/tools/tools.pri qt5base-5.6.3/src/corelib/tools/tools.pri
+--- qt5base-5.6.3.orig/src/corelib/tools/tools.pri	2019-08-11 00:45:45.073818635 +0300
++++ qt5base-5.6.3/src/corelib/tools/tools.pri	2017-09-06 15:13:54.000000000 +0300
+@@ -169,6 +169,7 @@ contains(QT_CONFIG,icu) {
+                tools/qcollator_icu.cpp \
+                tools/qtimezoneprivate_icu.cpp
+     DEFINES += QT_USE_ICU
++    QMAKE_CXXFLAGS += $$QT_CXXFLAGS_ICU
+ } else: win32 {
+     SOURCES += tools/qcollator_win.cpp
+ } else: macx {