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Building CoreFX on Linux and OS X

Building

  1. Install the prerequisites (Linux, macOS)
  2. Clone the corefx repo git clone https://github.com/dotnet/corefx.git
  3. Navigate to the corefx directory
  4. Run the build script ./build.sh

Calling the script build.sh builds both the native and managed code.

For more information about the different options when building, run build.sh --help and look at examples in the developer-guide.

To build per project, you can use the script .dotnet/dotnet msbuild from the root of the repo, e.g. .dotnet/dotnet msbuild src/System.Console/src /t:rebuild.

Minimum Hardware Requirements

  • 2GB RAM

Prerequisites (native build)

Linux

First, the package lists might need to be updated

sudo apt-get update

Native build

For Ubuntu 14.04, the following packages should be installed to build the native components

  • git
  • clang-9
  • cmake
  • make
  • libc6-dev
  • libssl-dev
  • libkrb5-dev
  • zlib1g-dev

sudo apt-get install git clang-9 cmake make libc6-dev libssl-dev libkrb5-dev zlib1g-dev

Managed build

For Ubuntu 14.04, install the following packages:

  • libunwind8
  • libicu52
  • curl

sudo apt-get install libunwind8 libicu52 curl

For Ubuntu 16.04 LTS / Bash on Ubuntu on Windows you may need to replace libicu52 with libicu55. Ubuntu 16.10 and Ubuntu 17.04 will require libicu57.

sudo apt-get install libunwind8 libicu55 curl

For Ubuntu 18.04, you will also need to replace libicu52 with libicu60 and install libssl1.0-dev_1.0.2n-1ubuntu5.1_amd64.deb with dpkg-deb.

sudo apt-get install libunwind8 libicu60 curl
apt-get download libssl1.0-dev
sudo dpkg-deb -X libssl1.0-dev_1.0.2n-1ubuntu5.1_amd64.deb /

In addition to the above packages, the runtime versions of the packages listed in the native section should also be installed (this happens automatically on most systems when you install the development packages).

Windows Subsystem For Linux

Generally building and testing should work fine on Windows Subsystem for Linux (WSL) and it can be convenient if you primarily work on Windows and want to run tests sometimes on Linux.

There is one caveat: you must set the LANG in your shell to something other than the default. For example,

export LANG=en_US.UTF-8

Otherwise you may get errors like PackagingException: File not found: '/home/dan/git/corefx/LICENSE.TXT'. More info in this issue. It is possible this may occur on other distros, if LANG is set as above.

We have not tested on WSL2 yet. If you try it out, we'd welcome an update.

macOS

macOS 10.12 or higher is needed to build corefx 2.x.

On macOS a few components are needed which are not provided by a default developer setup:

  • CMake
  • pkgconfig
  • OpenSSL 1.0.1 or 1.0.2

One way of obtaining these components is via Homebrew:

$ brew install cmake pkgconfig openssl

As of El Capitan (OS X 10.11), Apple still has the libraries for OpenSSL 0.9.8 in /usr/lib, but the headers are no longer available since that library version is out of support. Some compilers get upset over new headers being in /usr/local/include with the old library being present at /usr/lib/libcrypto.dylib (the tools have no issue with the versioned files, e.g. /usr/lib/libcrypto.0.9.8.dylib), and so Homebrew does not allow the OpenSSL package to be installed into system default paths. A minimal installation is presented here to facilitate simplifying runtime requirements and compile-time requirements (for build systems using CMake's find_package, like ours):

# We need to make the runtime libraries discoverable, as well as make
# pkg-config be able to find the headers and current ABI version.
#
# Ensure the paths we will need exist
mkdir -p /usr/local/lib/pkgconfig

# The rest of these instructions assume a default Homebrew path of
# /usr/local/opt/<module>, with /usr/local being the answer to
# `brew --prefix`.
#
# Runtime dependencies
ln -s /usr/local/opt/openssl/lib/libcrypto.1.0.0.dylib /usr/local/lib/
ln -s /usr/local/opt/openssl/lib/libssl.1.0.0.dylib /usr/local/lib/

# Compile-time dependencies (for pkg-config)
ln -s /usr/local/opt/openssl/lib/pkgconfig/libcrypto.pc /usr/local/lib/pkgconfig/
ln -s /usr/local/opt/openssl/lib/pkgconfig/libssl.pc /usr/local/lib/pkgconfig/
ln -s /usr/local/opt/openssl/lib/pkgconfig/openssl.pc /usr/local/lib/pkgconfig/

Known Issues

If you see errors along the lines of SendFailure (Error writing headers) you may need to import trusted root certificates:

mozroots --import --sync

FreeBSD

Build instructions for FreeBSD can be found here.