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In file included from /usr/include/features.h:398:0,
                 from /usr/include/stdio.h:27,
                 from ../../../libgcc/../gcc/tsystem.h:87,
                 from ../../../libgcc/libgcc2.c:27:
/usr/include/gnu/stubs.h:7:29: fatal error: gnu/stubs-soft.h: No such file or directory
 # include <gnu/stubs-soft.h>
 

touch /usr/include/gnu/stubs-soft.h

../configure 
--prefix=/opt/gcc5 
--disable-bootstrap 
--with-bugurl=http://bugs.merproject.org/ 
--build=armv7hl-meego-linux-gnueabi 
--disable-libstdcxx-pch 
--with-float=hard 
--with-fpu=neon 
--with-mode=thumb 
--with-arch=armv7-a 
--disable-sjlj-exceptions 
--disable-multilib 
--enable-checking=release 
--disable-fixed-point 
--with-system-zlib 
--enable-__cxa_atexit 
--disable-libunwind-exceptions 
--enable-gnu-unique-object 
--enable-lto 
--enable-linker-build-id 
--enable-languages=c,c++,objc,obj-c++ 
--enable-threads=posix 
--enable-shared 
--disable-libgcj 
--build=armv7hl-meego-linux-gnueabi
 

export EGL_PLATFORM=fbdev
export QMLSCENE_DEVICE=softwarecontext
export QT_QPA_PLATFORM=linuxfb:fb=/dev/fb-st7789s
/usr/lib/qt5/bin/qmlscene  main.qml

[root@Sailfish ~]# /usr/lib/qt5/bin/qmlscene 
WARNING: QApplication was not created in the main() thread.
Segmentation fault