fatal error: gnu/stubs-hard.h: No such file or directory

[thijstriemstra]

This is probably more a user error than an issue with this cross-compiler but perhaps someone knows what's going on here. I've build gcc 5.4.0 with kernel 4.4.11 on Ubuntu 16.04 with gcc 4.9.3 using this command:

FULL_REBUILD=1 XC_TARGET_NAME=rpi2 bash ./build.sh

And it all worked properly, e.g.:

$ gcc-cross-compiler/xc-arm-unknown-linux-gnueabihf/bin/arm-unknown-linux-gnueabihf-gcc --version
arm-unknown-linux-gnueabihf-gcc (GCC) 5.4.0
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

When I use this compiler to cross-compile Qt 5.6 for RaspberryPi it throws a lot of errors related to missing headers. Note that it worked with the official toolchain at https://github.com/raspberrypi/tools, only that one uses gcc 4.8.3 and is missing stdatomic.h that I need to build Python 3.5...

pulseaudio.cpp:34:30: fatal error: pulse/pulseaudio.h: No such file or directory
compilation terminated.
Makefile:187: recipe for target 'pulseaudio.o' failed
make: *** [pulseaudio.o] Error 1
PulseAudio disabled.

That's the first issue, but it's also complaining about gnu/stubs-hard.h: No such file or directory and hopefully you can tell me what that is about?

/home/raspi-build/gcc-cross-compiler/xc-arm-unknown-linux-gnueabihf/arm-unknown-linux-gnueabihf/include/gnu/stubs.h:10:29: fatal error: gnu/stubs-hard.h: No such file or directory
compilation terminated.
Makefile:192: recipe for target 'opengles2.o' failed
make: *** [opengles2.o] Error 1
OpenGL ES 2.0 disabled.
The OpenGL ES 2.0 functionality test failed!
 You might need to modify the include and library search paths by editing
 QMAKE_INCDIR_OPENGL_ES2, QMAKE_LIBDIR_OPENGL_ES2 and QMAKE_LIBS_OPENGL_ES2 in
 /home/raspi-build/qt-everywhere-opensource-src-5.6.0/qtbase/mkspecs/devices/linux-rasp-pi2-g++.

My sysroot was created with an rsync of the raspberrypi:

mkdir sysroot sysroot/usr sysroot/opt
rsync -avz pi@IP:/lib sysroot
rsync -avz pi@IP:/usr/include sysroot/usr
rsync -avz pi@IP:/usr/lib sysroot/usr
rsync -avz pi@IP:/opt/vc sysroot/opt

And a search does find a couple of stubs-hard.h on my machine:

$ locate stubs-hard.h
/home/raspi-build/sysroot/usr/include/arm-linux-gnueabihf/gnu/stubs-hard.h
/home/raspi-build/tools/arm-bcm2708/arm-rpi-4.9.3-linux-gnueabihf/arm-linux-gnueabihf/sysroot/usr/include/gnu/stubs-hard.h
/usr/arm-linux-gnueabi/include/gnu/stubs-hard.h

[thijstriemstra]

raspberrypi/tools#50 seems like a similar issue..

[pwaring]

What do you get from running cpp -v? That should show you all the library search paths towards the end of the output. If those directories don't include gnu/stubs-hard.h then that will be the source of the problem.

[thijstriemstra]

Here's the build script I use for Qt 5.6.1.

#!/bin/bash

# configures the Qt build

export RASPBERRYPI_DEVICE=linux-rasp-pi2-g++

# raspberrypi toolchain [GCC 4.8.3] (can't use: missing stdatomic.h, only available in GCC 4.9 and newer)
#export COMPILER=/home/raspi-build/src/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf-

# raspberrypi toolchain [GCC 4.9.3] (broken: see https://github.com/raspberrypi/tools/issues/50)
#export COMPILER=/home/raspi-build/src/tools/arm-bcm2708/arm-rpi-4.9.3-linux-gnueabihf/bin/arm-linux-gnueabihf-

# gcc-cross-compiler [GCC 5.4.0] (broken: see https://github.com/pwaring/gcc-cross-compiler/issues/11)
#export COMPILER=/home/raspi-build/src/gcc-cross-compiler/xc-arm-unknown-linux-gnueabihf/bin/arm-unknown-linux-gnueabihf-

# linaro [GCC 4.9.4] (works!)
export COMPILER=/home/raspi-build/src/gcc-linaro-4.9-2016.02-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf-

export SYSROOT=/home/raspi-build/sysroot
export TARGET_DIR_DEVICE=/usr/local/qt5pi
export TARGET_DIR_HOST=~/raspi-build/qt5pi
export TOOLS_DIR_HOST=~/raspi-build/qt5

./configure -release -opengl es2 -device $RASPBERRYPI_DEVICE \
  -device-option CROSS_COMPILE=$COMPILER -sysroot $SYSROOT \
  -opensource -confirm-license -make libs -make tools -no-compile-examples -no-pch \
  -prefix $TARGET_DIR_DEVICE \
  -extprefix $TARGET_DIR_HOST \
  -hostprefix $TOOLS_DIR_HOST -v 2>&1 | tee config.out

use it like this:

wget http://download.qt.io/official_releases/qt/5.6/5.6.1-1/single/qt-everywhere-opensource-src-5.6.1-1.tar.xz
tar xf qt-everywhere-opensource-src-5.6.1-1.tar.xz
cd qt-everywhere-opensource-src-5.6.1
../configure.sh
make
make install

Fortunately the gcc-linaro compiler worked so I think I'll stick to that unless you can find a solution because I prefer to build my own compiler like you're doing here. But feel free to close it otherwise.

[pwaring]

It's a bit beyond me at present - what I'll do is leave this open in case anyone with more knowledge/time has a solution.

[pwaring]

Closing this as I'm afraid I haven't had time to work on this project for a long time and I don't want to give the impression that it's still actively maintained.