Odroid-C2: Building QT5-base with Mali GLES 2.0 libs (Howto)

[wdirksen]

I am submitting this because I spent some time to get this to build and hope it may be of use to others. I used this link as a starting point: http://forum.odroid.com/viewtopic.php?t=24785:

PKGBUILD: $this->bbcode_second_pass_code('', '
# ALARM: Kevin Mihelich
# - -no-reduce-relocations -- not available on ARM
# - explicitly disable x86 optimizations
# - use OpenGLES 2.0

pkgname=qt5-base
_qtver=5.7.1
pkgver=${_qtver/-/}
pkgrel=1
arch=('i686' 'x86_64' aarch64')
url='http://qt-project.org/'
license=('GPL3' 'LGPL3' 'FDL' 'custom')
pkgdesc='A cross-platform application and UI framework'
depends=('libjpeg-turbo' 'xcb-util-keysyms' 'libgl' 'fontconfig' 'odroid-c2-libgl-x11'
'xcb-util-wm' 'libxrender' 'libxi' 'sqlite' 'xcb-util-image' 'icu' 'xf86-video-odroid-c2'
'tslib' 'libinput' 'libsm' 'libxkbcommon-x11' 'libproxy' 'libcups')
makedepends=('mtdev' 'libfbclient' 'libmariadbclient' 'sqlite' 'unixodbc' 'postgresql-libs' 'alsa-lib' 'gst-plugins-base-libs'
'gtk3' 'libpulse' 'cups' 'freetds' 'odroid-c2-libgl-headers' 'linux-odroid-c2-headers')
optdepends=('qt5-svg: to use SVG icon themes'
'postgresql-libs: PostgreSQL driver'
'libmariadbclient: MariaDB driver'
'unixodbc: ODBC driver'
'libfbclient: Firebird/iBase driver'
'freetds: MS SQL driver'
'mtdev: evdev plugin'
'gtk3: GTK platform plugin')
conflicts=('qtchooser')
groups=('qt' 'qt5')
_pkgfqn="${pkgname/5-/}-opensource-src-${_qtver}"
source=("http://download.qt.io/official_releases/qt/${pkgver%.*}/${_qtver}/submodules/${_pkgfqn}.tar.xz"
qtbug-49061.patch::"https://github.com/qt/qtbase/commit/494376f9.patch"
qtbug-55583.patch::"https://github.com/qt/qtbase/commit/84ea00d4.patch"
'qmake.conf' 'qplatformdefs.h')
md5sums=('f0809befe04160fbb73bbf38a06a2073'
'c86af27562bbbe05c3defd63d00130fd'
'7b11584d9ea1ccb6c419e9b9816dee63'
'SKIP'
'SKIP')

prepare() {
cd ${_pkgfqn}

mkdir $srcdir/${_pkgfqn}/mkspecs/devices/linux-odroid-c2-g++/
cp $srcdir/qmake.conf $srcdir/${_pkgfqn}/mkspecs/devices/linux-odroid-c2-g++/
cp $srcdir/qplatformdefs.h $srcdir/${_pkgfqn}/mkspecs/devices/linux-odroid-c2-g++/

# Build qmake using Arch {C,LD}FLAGS
# This also sets default {C,CXX,LD}FLAGS for projects built using qmake
sed -i -e "s|^\(QMAKE_CFLAGS_RELEASE.*\)|\1 ${CFLAGS}|" \
mkspecs/common/gcc-base.conf
sed -i -e "s|^\(QMAKE_LFLAGS_RELEASE.*\)|\1 ${LDFLAGS}|" \
mkspecs/common/g++-unix.conf

# Use python2 for Python 2.x
find . -name '*.py' -exec sed -i \
's|#![ ]*/usr/bin/python$|&2|;s|#![ ]*/usr/bin/env python$|&2|' {} +

# Fix libsystemd-journal detection
sed -e 's|libsystemd-journal|libsystemd|' -i config.tests/unix/journald/journald.pro -i src/corelib/global/global.pri

# Don't unload plugins in QPluginLoader https://bugreports.qt.io/browse/QTBUG-49061
patch -p1 -i ../qtbug-49061.patch

# Fix file chooser segfault on gnome/wayland https://bugreports.qt.io/browse/QTBUG-55583
patch -p1 -i ../qtbug-55583.patch
}

build() {
cd ${_pkgfqn}

PYTHON=/usr/bin/python2 ./configure -confirm-license -opensource -v \
-prefix /usr \
-device linux-odroid-c2-g++ \
-device-option CROSS_COMPILE=/usr/bin/aarch64-unknown-linux-gnu- \
-sysroot / \
-headerdir /usr/include/qt \
-archdatadir /usr/lib/qt \
-datadir /usr/share/qt \
-sysconfdir /etc/xdg \
-examplesdir /usr/share/doc/qt/examples \
-plugin-sql-{psql,mysql,sqlite,odbc,ibase} \
-system-sqlite \
-openssl-linked \
-nomake examples \
-no-rpath \
-optimized-qmake \
-dbus-linked \
-system-harfbuzz \
-journald \
-no-use-gold-linker \
-no-reduce-relocations \
-no-sse2 \
-no-sse3 \
-no-ssse3 \
-no-sse4.1 \
-no-sse4.2 \
-no-avx \
-no-avx2 \
-opengl es2

make
}

package() {
cd ${_pkgfqn}
make INSTALL_ROOT="${pkgdir}" install

install -D -m644 LGPL_EXCEPTION.txt \
"${pkgdir}"/usr/share/licenses/${pkgname}/LGPL_EXCEPTION.txt

# Drop QMAKE_PRL_BUILD_DIR because reference the build dir
find "${pkgdir}/usr/lib" -type f -name '*.prl' \
-exec sed -i -e '/^QMAKE_PRL_BUILD_DIR/d' {} \;

# Fix wrong qmake path in pri file
sed -i "s|${srcdir}/${_pkgfqn}|/usr|" \
"${pkgdir}"/usr/lib/qt/mkspecs/modules/qt_lib_bootstrap_private.pri

# Symlinks for backwards compatibility
for b in "${pkgdir}"/usr/bin/*; do
ln -s /usr/bin/$(basename $b) "${pkgdir}"/usr/bin/$(basename $b)-qt5
done
}
')
qmake.conf: $this->bbcode_second_pass_code('', '
include(../common/linux_device_pre.conf)
QT_QPA_DEFAULT_PLATFORM = xcb

QMAKE_INCDIR += \
$$[QT_SYSROOT]/usr/include

QMAKE_LIBDIR += \
$$[QT_SYSROOT]/usr/lib

QMAKE_LIBS_EGL += -lEGL -lMali
QMAKE_LIBS_OPENGL_ES2 += -lGLESv2 -lEGL
QMAKE_LIBS_OPENVG += -lOpenVG -lEGL

QMAKE_LFLAGS += \
-Wl,-rpath-link,$$[QT_SYSROOT]/usr/lib

QMAKE_LIBS += -lrt -lpthread -ldl

DISTRO_OPTS += aarch64
COMPILER_FLAGS += -mtune=cortex-a53 -march=armv8-a -DWIN_INTERFACE_CUSTOM

#EGLFS_DEVICE_INTEGRATION = eglfs_mali
QMAKE_INCDIR_EGL += $$[QT_SYSROOT]/usr/include
QMAKE_LIBDIR_EGL += $$[QT_SYSROOT]/usr/lib/mali-egl

# bug related to 6.1.1/cstdlib:75:25: fatal error: stdlib.h: No such file or directory
QMAKE_CFLAGS_ISYSTEM=''
include(../common/linux_arm_device_post.conf)
load(qt_config)
')
qplatformdefs.h $this->bbcode_second_pass_code('', '
#include "../../linux-g++/qplatformdefs.h"
')
Unfortunately despite a sucessful build of qt5-base with native GLESv2 support, I still cannot get mythtv to sucessfully configure itself to build with GLES 2 enabled. If anyone has advice in this regard then thanks...