CMake: cross-compile GoogleTest

This post is about how to cross-compile GoogleTest in Eclipse.

  • Ubuntu 16.04 LTS
  • Eclipse Neon.3 Release 4.6.3
Install CMake
$ sudo apt-get install cmake
Checkout GoogleTest
$ git clone
Configure ARM toolchain

How to install ARM toolchain see Raspberry Pi: C++ cross-compiling.

  • Create in the root of GoogleTest folder  toolchain-arm-linux-gnueabihf.cmake file with the following content:
# Target system

set(CMAKE_FIND_ROOT_PATH /usr/arm-linux-gnueabihf)

# Cross compiler
SET(CMAKE_C_COMPILER   /usr/bin/arm-linux-gnueabihf-gcc)
SET(CMAKE_CXX_COMPILER /usr/bin/arm-linux-gnueabihf-g++)

# Search for programs in the build host directories

# Libraries and headers in the target directories
  • Configure CMake:
$ cmake -DCMAKE_TOOLCHAIN_FILE=./toolchain-arm-linux-gnueabihf.cmake
Create Eclipse project
$ cmake -G "Eclipse CDT4 - Unix Makefiles"

Import the project in Eclipse:

  • File > Import
  • Select:
    • General
    • Existing Project into Workspace
    • Next
  • Select project
    • Select root directory > Browse (to the GoogleTest folder)
    • Finish
Compile GoogleTest


Project > Build project

Check library type
$ readelf -a -W ./googlemock/gtest/libgtest.a | more

File: ./googlemock/gtest/libgtest.a(
ELF Header:
  Magic:   7f 45 4c 46 01 01 01 03 00 00 00 00 00 00 00 00 
  Class:                             ELF32
  Data:                              2's complement, little endian
  Version:                           1 (current)
  OS/ABI:                            UNIX - GNU
  ABI Version:                       0
  Type:                              REL (Relocatable file)
  Machine:                           ARM
  Version:                           0x1
  Entry point address:               0x0
  Start of program headers:          0 (bytes into file)
  Start of section headers:          1328016 (bytes into file)
  Flags:                             0x5000000, Version5 EABI
  Size of this header:               52 (bytes)
  Size of program headers:           0 (bytes)
  Number of program headers:         0
  Size of section headers:           40 (bytes)
  Number of section headers:         10368
  Section header string table index: 10365

Raspberry Pi: C++ cross-compiling in Eclipse

Based on this GuruCoding page.

  • Ubuntu 16.04 LTS
  • Eclipse Neon.3 Release 4.6.3
  • arm-linux-gnueabihf (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609
  • Raspberry Pi 3 Model B
ARM toolchain

See Raspberry Pi: cross-compiling blog.

Upgrade libstdc++ to 6.0.21 on Raspberry Pi

See Raspberry Pi: how to solve the “version `GLIBCXX_6.0.21′ not found” problem.

Install Eclipse IDE for C/C++ developers

Download, unpack from here.

Eclipse plugins


  • Help > Install new software > Work with: –All Available Sites–
  • Check “Mobile and Device Development”
  • Next > Accept the terms of the license agreement” > Finish
  • Restart Eclipse
Create project

In Eclipse:

  • File > New > C++ Project
  • C++ Project
    • Project name: helloworld
    • Project type: Hello World C++ Project
    • Toolchains: Cross GCC
    • Next
  • Basic Settings
    • Hello world greeting: Hello world!
    • Next
  • Select Configurations
    • Next
  • Cross GCC Command
    • Cross compiler prefix: arm-linux-gnueabihf-
    • Cross compiler path: /usr/bin
    • Finish
  • Project > Properties > C/C++ Build > Settings
    • Tool Settings > Cross Settings
      • Prefix: arm-linux-gnueabihf-
      • Path: /usr/bin
Enable C++ 11
  • Project > Properties > C/C++ Build > Settings
    • Configuration: Debug/Release
    • Tool Settings > Cross G++ Compiler > Dialect: ISO C+11 (-std=c++0x)
  • Project > Build All

Raspberry Pi: debugging with gdb, command line


This post is about how to debug Raspberry Pi software with gdb, command line. For gdb debugging in Eclipse see Raspberry Pi: gdb debugging in Eclipse.

In case you are interested how to debug Dart command line applications in IntelliJ – see Raspberry Pi: How to remote debug Dart command line applications in IntelliJ.


  • Ubuntu 16.04 LTS
  • arm-linux-gnueabihf (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609
  • Raspberry Pi 3 Model B

Prepare/compile helloworld

See here.

Install gdb-multiarch on host

$ sudo apt-get install gdb-multiarch

Install gdbserver on Raspberry Pi

$ sudo apt-get install gdbserver


# On target, - debug host's ip address
$ gdbserver --multi
Listening on port 2345

# On host, - target ip address
$ gdb-multiarch
GNU gdb (Ubuntu 7.11.1-0ubuntu1~16.04) 7.11.1
Copyright (C) 2016 Free Software Foundation, Inc.
For help, type "help".
Type "apropos word" to search for commands related to "word".
(gdb) target extended-remote
Remote debugging using
(gdb) set remote exec-file /home/pi/path/helloworld
(gdb) file /home/uname/path/helloworld
Reading symbols from /home/uname/path/helloworld...done.
(gdb) start
Temporary breakpoint 1 at 0x105f4: file src/helloworld.cpp, line 12.
Starting program: /home/uname/path/helloworld 
Temporary breakpoint 1, main () at src/helloworld.cpp:12
12    int main() {
(gdb) next
13        std::cout << "Hello World!" << std::endl;
(gdb) next
12    int main() {
(gdb) next
13        std::cout << "Hello World!" << std::endl;
(gdb) next
12    int main() {
(gdb) next
13        std::cout << "Hello World!" << std::endl;
(gdb) next
15    }

# On target
Remote debugging from host
Process /home/pi/path/helloworld created; pid = 2267
Hello World!


Raspberry Pi: C++ cross-compiling

  • Ubuntu 16.04 LTS
  • arm-linux-gnueabihf (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609
  • Raspberry Pi 3 Model B
Install build tools

Check/install build-essential:

# Check if build-essential is installed
$ dpkg -s build-essntial
# Install build-essential if needed
$ sudo apt-get install build-essential
Install ARM toolchain
# ARM build tools
$ sudo apt-get install g++-arm-linux-gnueabihf
# Check installation
$ arm-linux-gnueabihf-g++ -v
Upgrade libstdc++ to 6.0.21 on Raspberry Pi

See Raspberry Pi: how to solve the “version `GLIBCXX_6.0.21′ not found” problem.

Create helloworld.cpp
#include <iostream>

int main() {
    std::cout << "Hello World!" << std::endl;
    return 0;
$ arm-linux-gnueabihf-g++ -O3 -g3 -Wall -fPIC -c -o helloworld.o helloworld.cpp
$ arm-linux-gnueabihf-g++ -o helloworld helloworld.o
Copy helloworld to Raspberry Pi
$ scp ./helloworld
Login into Raspberry Pi and run helloworld
$ ssh
# On Raspberry Pi
$ cd path
$ ./helloworld
Hello World!
g++-arm-linux-gnueabihf pakage detais
$ dpkg -s g++-arm-linux-gnueabihf
Package: g++-arm-linux-gnueabihf
Status: install ok installed
Priority: optional
Section: devel
Installed-Size: 11
Maintainer: Ubuntu Developers <>
Architecture: amd64
Source: gcc-defaults (1.150ubuntu1)
Version: 4:5.3.1-1ubuntu1
Depends: cpp-arm-linux-gnueabihf (>= 4:5.3.1-1ubuntu1), gcc-arm-linux-gnueabihf (>= 4:5.3.1-1ubuntu1), g++-5-arm-linux-gnueabihf (>= 5.3.1-3~)
Description: GNU C++ compiler for the armhf architecture
 This is the GNU C++ compiler, a fairly portable optimizing compiler for C++.
 This is a dependency package providing the default GNU C++ cross-compiler
 for the armhf architecture.
Original-Maintainer: Debian GCC Maintainers <>

Fuchsia OS: download, build and run


Supported build platforms

At the moment of writing two build platforms seems to be supported – Ubuntu and Mac OSx. This article focuses on Ubuntu.

Getting the source

How to install version control tools and checkout Fuchsia OS repositories is described on the Fuchsia Manifest page:

# Install tools
sudo apt-get install golang git-all build-essential curl
# Install jiri scripts
curl -s | bash -s fuchsia
# Export path to jiri
cd fuchsia
export PATH=`pwd`/.jiri_root/bin:$PATH
# Import/update Fuchsia code
jiri import fuchsia
jiri update

Building Fuchsia

Build instructions can be found in the Fuchsia Repository:

# Setup build environment, amr64
source scripts/ && envprompt && fset arm64
# Build

Built sysroot will be in:


and the boot image in:



cd fuchsia
git clone
cd qemu
./configure --target-list=arm-softmmu,aarch64-softmmu,x86_64-softmmu
make -j32
sudo make install

Run Fuchsia OS in QEMU

cd fuchsia/magenta
# Run aarch64 (optionally, with graphical consol - add -g)
./scripts/run-magenta-arm64 -x ../out/debug-aarch64/user.bootfs -m 2048 [-g]

Magenta on Raspberry PI

See Magenta on Raspberry Pi and Raspberry Pi: compile and run Magenta pages.