在 Buildroot 中安装 Dotnet Core SDK 3.1？

Question

I have searched for a long time but have not found any instructions or help in the whole WorldWideWeb how to install the DotNet Core SDK 3.1 on a buildroot for 64Bit systems.

Unfortunately DotNet is not available in the menuconfig entry, so you have to install and use it manually.

Does anyone already have DotNet Core installed on a buildroot and can show me how to add the package manually to buildroot? Thanks in advance.

Answer 1

I have just made a package for Buildroot you are looking for. Please take a look at my post to Buildroot's mail list fore more details and caveats: http://lists.busybox.net/pipermail/buildroot/2020-August/289140.html

Basically, you need to create new directory package/dotnet-runtime and place three files there: Config.in, dotnet-runtime.hash and dotnet-runtime.mk (I am using external tree as described here: https://buildroot.org/downloads/manual/manual.html#outside-br-custom ). These are small text files, so I copy the content here.

• Config.in:

comment "dotnet-runtime needs a toolchain w/ glibc and threads"
        depends on !BR2_TOOLCHAIN_USES_GLIBC

config BR2_PACKAGE_DOTNET_RUNTIME
    bool "dotnet-runtime"
    depends on BR2_TOOLCHAIN_USES_GLIBC
    depends on BR2_TOOLCHAIN_HAS_THREADS
    depends on BR2_PACKAGE_LIBZLIB
    depends on BR2_PACKAGE_OPENSSL
    depends on BR2_PACKAGE_LIBCURL
    depends on BR2_PACKAGE_ICU
    help
      .NET Core 3.1 Runtime (v3.1.7) - Linux ARM32 binaries

      https://dotnet.microsoft.com/download/dotnet-core/3.1 

• dotnet-runtime.hash (just one line)

sha512 a586ed88cebbef298cda04c94e1809017800abea50668e18bcf27c3aa1ca114bb16963bcdcc4fd535288838120cba52966d594ef395bb8fac11693f64c97ccc1 dotnet-runtime-3.1.7-linux-arm.tar.gz

• dotnet-runtime.mk

################################################################################
#
# dotnet-runtime
#
################################################################################
DOTNET_RUNTIME_VERSION = 3.1.7
DOTNET_RUNTIME_SITE = https://download.visualstudio.microsoft.com/download/pr/69984653-402e-442c-9588-eb92560d0fce/5ad7995a09334dd2ee56f00fb6dc0521
DOTNET_RUNTIME_SOURCE = dotnet-runtime-$(DOTNET_RUNTIME_VERSION)-linux-arm.tar.gz
DOTNET_RUNTIME_LICENSE = MIT
DOTNET_RUNTIME_LICENSE_FILES = LICENSE.txt

# Runtime could be installed in the global location [/usr/share/dotnet] and
# will be picked up automatically.
# As alternative, it is possible to use the DOTNET_ROOT environment variable
# to specify the runtime location or register the runtime location in
# [/etc/dotnet/install_location] 
# This script will install runtime to
# /usr/share/dotnet-runtime-$(DOTNET_RUNTIME_VERSION)
define DOTNET_RUNTIME_INSTALL_TARGET_CMDS
    cp -R $(@D) $(TARGET_DIR)/usr/share/
endef

$(eval $(generic-package)) 

After selecting all dependencies, the package should be visible in menuconfig. This package is not 100% universal (only for 32-bit ARM) but should be easy to adapt for other use-cases. Just change download links and hash for 64-bit version. Please refer to the mailing list post I mentioned above for more details.