QT5.1 for android compilation error.

plazma

Hi all,

I'm trying to build QT5 for Android according manual - http://qt-project.org/wiki/Qt5ForAndroidBuilding
Stage 6 -
make
returns error (after a few mins or work) :
cc1plus: error: unrecognized command line option ‘-mfpu=neon’
@
g++ -c -pipe -g -fvisibility=hidden -fvisibility-inlines-hidden -std=c++0x -fno-exceptions -Wall -W -D_REENTRANT -fPIC -DQT_NO_LIBUDEV -DQT_NO_XCB -DQT_NO_USING_NAMESPACE -DQT_BUILD_GUI_LIB -DQT_BUILDING_QT -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT_MOC_COMPAT -DQT_USE_QSTRINGBUILDER -DQT_DEPRECATED_WARNINGS -DQT_DISABLE_DEPRECATED_BEFORE=0x050000 -DQT_USE_BUNDLED_LIBPNG -DQT_NO_EXCEPTIONS -DQT_CORE_LIB -mfpu=neon -I../../mkspecs/linux-g++ -I. -I../../include -I../../include/QtGui -I../../include/QtGui/5.1.0 -I../../include/QtGui/5.1.0/QtGui -Iimage -I../3rdparty/libpng -I../../include/QtCore -I../../include/QtCore/5.1.0 -I../../include/QtCore/5.1.0/QtCore -I.moc/debug-shared image/qimage_neon.cpp -o .obj/debug-shared/qimage_neon.o
cc1plus: error: unrecognized command line option ‘-mfpu=neon’
@

Host machine is Gentoo Linux x86

Will appreciate any advice.

SGaist

Hi,

It seems you are using a x86 compiler. -mfpu neon concerns ARM processor. If you want to build for Android on ARM you'll need a cross-compiler

plazma

I use the manual - http://qt-project.org/wiki/Qt5ForAndroidBuilding

Stage 5 - is configure
@./configure -developer-build -xplatform android-g++ -nomake tests -nomake examples -android-ndk <path/to/ndk> -android-sdk <path/to/sdk> -skip qttools -skip qttranslations -skip qtwebkit -skip qtserialport -skip qtwebkit-examples-and-demos
@

I provide correct paths for Android SDK & NDK.
I suppose it is compiled with right gcc version. Isn't ?

SGaist

From what I can see, it uses the linux-g++ mkspec, since you're building for android it should be the android-g++ mkspec, so there is something wrong.

Did you check that the configuration was successful ?

plazma

configuration looks ok, but g++ is running with linux-g++

What's wrong ?

@
Configure summary

Building on: linux-g++ (i386, CPU features:)
Building for: android-g++ (arm, CPU features:)

Build options:
Configuration .......... accessibility audio-backend c++11 clock-gettime clock-monotonic concurrent cross_compile debug egl eglfs evdev eventfd freetype full-config getaddrinfo inotify ipv6ifname large-config medium-config minimal-config mremap neon no-pkg-config opengl opengles2 pcre png precompile_header private_tests qpa qpa reduce_exports reduce_relocations rpath shared small-config system-zlib v8 v8snapshot warnings_are_errors
Build parts ............ libs
Mode ................... debug
Using C++11 ............ yes
Using PCH .............. yes
Target compiler supports:
iWMMXt/Neon .......... no/yes

Qt modules and options:
Qt D-Bus ............... no
Qt Concurrent .......... yes
Qt GUI ................. yes
Qt Widgets ............. yes
JavaScriptCore JIT ..... no
QML debugging .......... yes
Use system proxies ..... no

Support enabled for:
Accessibility .......... yes
ALSA ................... no
CUPS ................... no
FontConfig ............. no
Iconv .................. no
ICU .................... no
Image formats:
GIF .................. plugin
JPEG ................. plugin (qt)
PNG .................. yes (qt)
Glib ................... no
GStreamer .............. no
GTK theme .............. no
Large Files ............ no
Networking:
getaddrinfo .......... yes
getifaddrs ........... no
IPv6 ifname .......... yes
OpenSSL .............. no
NIS .................... no
OpenGL ................. yes (OpenGL ES 2.x)
OpenVG ................. no
PCRE ................... yes (qt)
pkg-config ............. no
PulseAudio ............. no
QPA backends:
DirectFB ............. no
EGLFS ................ yes
KMS .................. no
LinuxFB .............. no
XCB .................. no
Session management ..... auto
SQL drivers:
DB2 .................. no
InterBase ............ no
MySQL ................ no
OCI .................. no
ODBC ................. no
PostgreSQL ........... no
SQLite 2 ............. no
SQLite ............... plugin (qt)
TDS .................. no
udev ................... no
xkbcommon .............. no
zlib ................... yes (system)

Qt is now configured for building. Just run 'gmake'.
Once everything is built, Qt is installed.
You should not run 'gmake install'.

Prior to reconfiguration, make sure you remove any leftovers from
the previous build.

@

SGaist

Check your android-g++ mkspec to be sure it's correct

plazma

Oh,
I have files in qt5.../qtbase/mkspecs/android-g++/
but to be honest I don't know how to check if it's correct.

I tried to compile qt5.1-alfa and qt5 cloned from the git.

Results are the same.

SGaist

From a quick lookup in the qmake.conf in this folder, I would say that it fails to determine ANDROID_TOOLCHAIN_PREFIX, could you do a verbose configure to see if there are tests that fails ?