package/go: new subdirectory for go variants

Move every go compiler-related packages into a newly created
package/go/ subdirectory.

This subdirectory structure moves the GO_VERSION variable into the
common package/go/go.mk file. In the next commits, host-go will be
turned into a virtual-package and the common GO_VERSION force the
providers to use the same Go compiler version.
Common variables to all providers are kept in package/go/go.mk and
package/go/Config.in.host.
Also, the subdirectory structure forces the evaluation of the common
GO_VERSION before the providers access it.

Signed-off-by: Thomas Perale <thomas.perale@mind.be>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

.checkpackageignore

@@ -715,7 +715,7 @@ package/glorytun/0002-aegis256.c-fix-aarch64-build-with-uclibc.patch lib_patch.U
 package/gnu-efi/0001-Make.defaults-don-t-override-ARCH-when-cross-compili.patch lib_patch.Upstream
 package/gnupg/0001-build-Always-use-EXTERN_UNLESS_MAIN_MODULE-pattern.patch lib_patch.Upstream
 package/gnuplot/0001-configure-add-without-demo-option.patch lib_patch.Upstream
-package/go/0001-build.go-explicit-option-for-crosscompilation.patch lib_patch.Upstream
+package/go/go/0001-build.go-explicit-option-for-crosscompilation.patch lib_patch.Upstream
 package/gob2/0001-dont-include-from-prefix.patch lib_patch.Upstream
 package/gobject-introspection/0001-disable-tests.patch lib_patch.Upstream
 package/gobject-introspection/0002-Add-rpath-links-to-ccompiler.patch lib_patch.Upstream

DEVELOPERS

@@ -616,9 +616,6 @@ F:	package/docker-engine/
 F:	package/embiggen-disk/
 F:	package/fuse-overlayfs/
 F:	package/go/
-F:	package/go-bootstrap-stage1/
-F:	package/go-bootstrap-stage2/
-F:	package/go-bootstrap-stage3/
 F:	package/gocryptfs/
 F:	package/mbpfan/
 F:	package/moby-buildkit/

package/Config.in.host

@@ -44,9 +44,6 @@ menu "Host utilities"
 	source "package/genpart/Config.in.host"
 	source "package/gnupg/Config.in.host"
 	source "package/go/Config.in.host"
-	source "package/go-bootstrap-stage1/Config.in.host"
-	source "package/go-bootstrap-stage2/Config.in.host"
-	source "package/go-bootstrap-stage3/Config.in.host"
 	source "package/google-breakpad/Config.in.host"
 	source "package/gptfdisk/Config.in.host"
 	source "package/imagemagick/Config.in.host"

package/go/Config.in.host

@@ -31,3 +31,7 @@ config BR2_PACKAGE_HOST_GO_HOST_ARCH_SUPPORTS
 	bool
 	default y
 	depends on BR2_PACKAGE_HOST_GO_BOOTSTRAP_STAGE3_ARCH_SUPPORTS
+
+source "package/go/go-bootstrap-stage1/Config.in.host"
+source "package/go/go-bootstrap-stage2/Config.in.host"
+source "package/go/go-bootstrap-stage3/Config.in.host"

package/go/go.mk

@@ -5,14 +5,7 @@
 ################################################################################
 
 GO_VERSION = 1.22.3
-GO_SITE = https://storage.googleapis.com/golang
-GO_SOURCE = go$(GO_VERSION).src.tar.gz
 
-GO_LICENSE = BSD-3-Clause
-GO_LICENSE_FILES = LICENSE
-GO_CPE_ID_VENDOR = golang
-
-HOST_GO_DEPENDENCIES = host-go-bootstrap-stage3
 HOST_GO_GOPATH = $(HOST_DIR)/share/go-path
 HOST_GO_HOST_CACHE = $(HOST_DIR)/share/host-go-cache
 HOST_GO_ROOT = $(HOST_DIR)/lib/go
@@ -96,15 +89,6 @@ else
 HOST_GO_CGO_ENABLED = 0
 endif
 
-HOST_GO_CROSS_ENV = \
-	CC_FOR_TARGET="$(TARGET_CC)" \
-	CXX_FOR_TARGET="$(TARGET_CXX)" \
-	GOOS="linux" \
-	GOARCH=$(GO_GOARCH) \
-	$(if $(GO_GO386),GO386=$(GO_GO386)) \
-	$(if $(GO_GOARM),GOARM=$(GO_GOARM)) \
-	GO_ASSUME_CROSSCOMPILING=1
-
 else # !BR2_PACKAGE_HOST_GO_TARGET_ARCH_SUPPORTS
 # host-go can still be used to build packages for the host. No need to set all
 # the arch stuff since we will not be cross-compiling.
@@ -123,27 +107,7 @@ HOST_GO_HOST_ENV = \
 	CGO_CXXFLAGS="$(HOST_CXXFLAGS)" \
 	CGO_LDFLAGS="$(HOST_LDFLAGS)"
 
-# The go build system is not compatible with ccache, so use
-# HOSTCC_NOCCACHE.  See https://github.com/golang/go/issues/11685.
-HOST_GO_MAKE_ENV = \
-	GO111MODULE=off \
-	GOCACHE=$(HOST_GO_HOST_CACHE) \
-	GOROOT_BOOTSTRAP=$(HOST_GO_BOOTSTRAP_STAGE3_ROOT) \
-	GOROOT_FINAL=$(HOST_GO_ROOT) \
-	GOROOT="$(@D)" \
-	GOBIN="$(@D)/bin" \
-	GOOS=linux \
-	CC=$(HOSTCC_NOCCACHE) \
-	CXX=$(HOSTCXX_NOCCACHE) \
-	CGO_ENABLED=$(HOST_GO_CGO_ENABLED) \
-	$(HOST_GO_CROSS_ENV)
-
-define HOST_GO_BUILD_CMDS
-	cd $(@D)/src && \
-		$(HOST_GO_MAKE_ENV) ./make.bash $(if $(VERBOSE),-v)
-endef
-
-define HOST_GO_INSTALL_CMDS
+define GO_BINARIES_INSTALL
 	$(INSTALL) -D -m 0755 $(@D)/bin/go $(HOST_GO_ROOT)/bin/go
 	$(INSTALL) -D -m 0755 $(@D)/bin/gofmt $(HOST_GO_ROOT)/bin/gofmt
 
@@ -165,4 +129,4 @@ define HOST_GO_INSTALL_CMDS
 	find $(HOST_GO_ROOT) -type f -exec touch -r $(@D)/bin/go {} \;
 endef
 
-$(eval $(host-generic-package))
+include $(sort $(wildcard package/go/*/*.mk))

package/go/go/go.mk

@@ -0,0 +1,53 @@
+################################################################################
+#
+# go
+#
+################################################################################
+
+GO_SITE = https://storage.googleapis.com/golang
+GO_SOURCE = go$(GO_VERSION).src.tar.gz
+
+GO_LICENSE = BSD-3-Clause
+GO_LICENSE_FILES = LICENSE
+GO_CPE_ID_VENDOR = golang
+
+HOST_GO_DEPENDENCIES = host-go-bootstrap-stage3
+
+ifeq ($(BR2_PACKAGE_HOST_GO_TARGET_ARCH_SUPPORTS),y)
+
+HOST_GO_CROSS_ENV = \
+	CC_FOR_TARGET="$(TARGET_CC)" \
+	CXX_FOR_TARGET="$(TARGET_CXX)" \
+	GOOS="linux" \
+	GOARCH=$(GO_GOARCH) \
+	$(if $(GO_GO386),GO386=$(GO_GO386)) \
+	$(if $(GO_GOARM),GOARM=$(GO_GOARM)) \
+	GO_ASSUME_CROSSCOMPILING=1
+
+endif
+
+# The go build system is not compatible with ccache, so use
+# HOSTCC_NOCCACHE.  See https://github.com/golang/go/issues/11685.
+HOST_GO_MAKE_ENV = \
+	GO111MODULE=off \
+	GOCACHE=$(HOST_GO_HOST_CACHE) \
+	GOROOT_BOOTSTRAP=$(HOST_GO_BOOTSTRAP_STAGE3_ROOT) \
+	GOROOT_FINAL=$(HOST_GO_ROOT) \
+	GOROOT="$(@D)" \
+	GOBIN="$(@D)/bin" \
+	GOOS=linux \
+	CC=$(HOSTCC_NOCCACHE) \
+	CXX=$(HOSTCXX_NOCCACHE) \
+	CGO_ENABLED=$(HOST_GO_CGO_ENABLED) \
+	$(HOST_GO_CROSS_ENV)
+
+define HOST_GO_BUILD_CMDS
+	cd $(@D)/src && \
+		$(HOST_GO_MAKE_ENV) ./make.bash $(if $(VERBOSE),-v)
+endef
+
+define HOST_GO_INSTALL_CMDS
+	$(GO_BINARIES_INSTALL)
+endef
+
+$(eval $(host-generic-package))