[3/3] package/go: add prebuilt Go compiler option

According to the TO-DO list, the prebuilt Go compiler is considered as
important to be implemented. So, I'm trying to help you to add the
prebuilt Go compiler support into Buildroot.

Signed-off-by: Athaariq Ardhiansyah <foss@athaariq.my.id>
---
 package/go/Config.in.host     | 22 +++++++++++++++-
 package/go/go-bin/go-bin.hash |  8 ++++++
 package/go/go-bin/go-bin.mk   | 47 +++++++++++++++++++++++++++++++++++
 3 files changed, 76 insertions(+), 1 deletion(-)
 create mode 100644 package/go/go-bin/go-bin.hash
 create mode 100644 package/go/go-bin/go-bin.mk

Athaariq, All,

On 2024-06-10 22:40 +0700, Athaariq Ardhiansyah spake thusly:
> According to the TO-DO list, the prebuilt Go compiler is considered as
> important to be implemented. So, I'm trying to help you to add the
> prebuilt Go compiler support into Buildroot.
> 
> Signed-off-by: Athaariq Ardhiansyah <foss@athaariq.my.id>

Thank you for your proposal. However, Thomas Perale had been working on
his series and just respun a new iterartion of their patch, that is
musch closer to a solution we were expecting.

Thank you for the effort nonetheless, it is still much appreciated!
Maybe there are a few other, maybe-simpler topics you can have a look
into.

Thanks!

Regards,
Yann E. MORIN.

> ---
>  package/go/Config.in.host     | 22 +++++++++++++++-
>  package/go/go-bin/go-bin.hash |  8 ++++++
>  package/go/go-bin/go-bin.mk   | 47 +++++++++++++++++++++++++++++++++++
>  3 files changed, 76 insertions(+), 1 deletion(-)
>  create mode 100644 package/go/go-bin/go-bin.hash
>  create mode 100644 package/go/go-bin/go-bin.mk
> 
> diff --git a/package/go/Config.in.host b/package/go/Config.in.host
> index 32483871e7..ffd2594a80 100644
> --- a/package/go/Config.in.host
> +++ b/package/go/Config.in.host
> @@ -32,6 +32,16 @@ config BR2_PACKAGE_HOST_GO_HOST_ARCH_SUPPORTS
>  	default y
>  	depends on BR2_PACKAGE_HOST_GO_BOOTSTRAP_STAGE3_ARCH_SUPPORTS
>  
> +# Only required for prebuilt Go compiler
> +config BR2_PACKAGE_HOST_GO_ARCH_SUPPORTS
> +	bool
> +	default y if (BR2_HOSTARCH = "arm" && BR2_TOOLCHAIN_SUPPORTS_PIE)
> +	default y if BR2_HOSTARCH = "aarch64"
> +	default y if BR2_HOSTARCH = "powerpc64le"
> +	default y if BR2_HOSTARCH = "s390x"
> +	default y if BR2_HOSTARCH = "x86"
> +	default y if BR2_HOSTARCH = "x86_64"
> +
>  # Go packages should select BR2_PACKAGE_HOST_GO
>  config BR2_PACKAGE_HOST_GO
>  	bool "host go"
> @@ -52,12 +62,22 @@ config BR2_PACKAGE_HOST_GO_SRC
>  	help
>  	  This package will build the go compiler for the host.
>  
> +config BR2_PACKAGE_HOST_GO_BIN
> +	bool "host go (prebuilt)"
> +	depends on BR2_PACKAGE_HOST_GO_ARCH_SUPPORTS
> +	help
> +	  This package will download the go compiler binary for
> +	  the host without build process.
> +
> +comment "host-go-bin doesn't support $(BR2_HOSTARCH) host architecture."
> +	depends on !BR2_PACKAGE_HOST_GO_ARCH_SUPPORTS
> +
>  endchoice
>  
>  config BR2_PACKAGE_PROVIDES_HOST_GO
>  	string
> -	# Default to host-go-src
>  	default "host-go-src" if BR2_PACKAGE_HOST_GO_SRC
> +	default "host-go-bin" if BR2_PACKAGE_HOST_GO_BIN
>  
>  endif
>  
> diff --git a/package/go/go-bin/go-bin.hash b/package/go/go-bin/go-bin.hash
> new file mode 100644
> index 0000000000..52b6c6355f
> --- /dev/null
> +++ b/package/go/go-bin/go-bin.hash
> @@ -0,0 +1,8 @@
> +# From https://go.dev/dl
> +sha256  fefba30bb0d3dd1909823ee38c9f1930c3dc5337a2ac4701c2277a329a386b57  go1.22.3.linux-386.tar.gz
> +sha256  8920ea521bad8f6b7bc377b4824982e011c19af27df88a815e3586ea895f1b36  go1.22.3.linux-amd64.tar.gz
> +sha256  6c33e52a5b26e7aa021b94475587fce80043a727a54ceb0eee2f9fc160646434  go1.22.3.linux-arm64.tar.gz
> +sha256  f2bacad20cd2b96f23a86d4826525d42b229fd431cc6d0dec61ff3bc448ef46e  go1.22.3.linux-armv6l.tar.gz
> +sha256  04b7b05283de30dd2da20bf3114b2e22cc727938aed3148babaf35cc951051ac  go1.22.3.linux-ppc64le.tar.gz
> +sha256  2aba796417a69be5f3ed489076bac79c1c02b36e29422712f9f3bf51da9cf2d4  go1.22.3.linux-s390x.tar.gz
> +sha256  2d36597f7117c38b006835ae7f537487207d8ec407aa9d9980794b2030cbc067  LICENSE
> diff --git a/package/go/go-bin/go-bin.mk b/package/go/go-bin/go-bin.mk
> new file mode 100644
> index 0000000000..cb320f44fa
> --- /dev/null
> +++ b/package/go/go-bin/go-bin.mk
> @@ -0,0 +1,47 @@
> +################################################################################
> +#
> +# go-bin
> +#
> +################################################################################
> +
> +# Translate Buildroot's arch enumeration to Go's arch
> +ifeq ($(BR2_PACKAGE_HOST_GO_ARCH_SUPPORTS), y)
> +
> +ifeq ($(BR2_HOSTARCH), "arm")
> +GO_GOARCH = "armv6l"
> +else ifeq ($(BR2_HOSTARCH), "aarch64")
> +GO_GOARCH = "arm64"
> +else ifeq ($(BR2_HOSTARCH), "powerpc64le")
> +GO_GOARCH = "ppc64le"
> +else ifeq ($(BR2_HOSTARCH), "powerpc64le")
> +GO_GOARCH = "ppc64le"
> +else ifeq ($(BR2_HOSTARCH), "x86")
> +GO_GOARCH = "386"
> +else ifeq ($(BR2_HOSTARCH), "x86_64")
> +GO_GOARCH = "amd64"
> +else
> +GO_GOARCH = $(BR2_HOSTARCH)
> +endif
> +
> +endif # BR2_PACKAGE_HOST_GO_ARCH_SUPPORTS
> +
> +GO_BIN_SITE = https://storage.googleapis.com/golang
> +GO_BIN_SOURCE = go$(GO_VERSION).linux-$(GO_GOARCH).tar.gz
> +
> +GO_BIN_LICENSE = BSD-3-Clause
> +GO_BIN_LICENSE_FILES = LICENSE
> +GO_BIN_CPE_ID_VENDOR = golang
> +
> +HOST_GO_SRC_PROVIDES = host-go
> +
> +ifeq ($(BR2_PACKAGE_HOST_GO_TARGET_ARCH_SUPPORTS),y)
> +ifeq ($(BR2_PACKAGE_HOST_GO_ARCH_SUPPORTS), y)
> +
> +define HOST_GO_BIN_INSTALL_CMDS
> +	$(GO_BINARIES_INSTALL)
> +endef
> +
> +endif # BR2_PACKAGE_HOST_GO_ARCH_SUPPORTS
> +endif # BR2_PACKAGE_HOST_GO_TARGET_ARCH_SUPPORTS
> +
> +$(eval $(host-generic-package))
> -- 
> 2.45.2
> 
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