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golang: Add option to use external bootstrap Go 

The default bootstrap Go (Go 1.4) can only be compiled on a limited
number of platforms compared to newer versions of Go.

This adds a config option to use an external bootstrap Go, e.g.
installed through the build system's package manager or downloaded from
golang.org.

See: https://github.com/openwrt/packages/issues/11731

Signed-off-by: Jeffery To <jeffery.to@gmail.com>
This commit is contained in:
Jeffery To 2020-05-12 17:42:48 +08:00
parent c5e30e529e
commit 49a2ff493b
1 changed files with 29 additions and 5 deletions
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34
lang/golang/golang/Makefile
View File

@ -154,6 +154,23 @@ This package provides an assembler, compiler, linker, and compiled
libraries for the Go programming language.
endef
define Package/golang/config
menu "Configuration"
config GOLANG_EXTERNAL_BOOTSTRAP_ROOT
string "External bootstrap Go root directory"
help
Path to a working Go tree (>= Go 1.4), with bin, pkg, and src
subdirectories and the Go compiler at bin/go.
If specified, the existing Go installation will be used to
compile host (buildroot) Go.
Leave blank to compile the default bootstrap Go.
endmenu
endef
define Package/golang-doc
$(call Package/golang/Default)
TITLE+= (documentation)
@ -177,22 +194,29 @@ This package provides the Go programming language source files needed
for cross-compilation.
endef
EXTERNAL_BOOTSTRAP_DIR:=$(call qstrip,$(CONFIG_GOLANG_EXTERNAL_BOOTSTRAP_ROOT))
USE_DEFAULT_BOOTSTRAP:=$(if $(EXTERNAL_BOOTSTRAP_DIR),,1)
define Download/golang-bootstrap
FILE:=$(BOOTSTRAP_SOURCE)
URL:=$(BOOTSTRAP_SOURCE_URL)
HASH:=$(BOOTSTRAP_HASH)
endef
$(eval $(call Download,golang-bootstrap))
$(eval $(call GoCompiler/AddProfile,Bootstrap,$(BOOTSTRAP_BUILD_DIR),,bootstrap,$(GO_HOST_OS_ARCH)))
$(eval $(call GoCompiler/AddProfile,Host,$(HOST_BUILD_DIR),$(HOST_GO_PREFIX),$(HOST_GO_VERSION_ID),$(GO_HOST_OS_ARCH),$(HOST_GO_INSTALL_SUFFIX)))
$(eval $(call GoCompiler/AddProfile,Package,$(PKG_BUILD_DIR),$(PKG_GO_PREFIX),$(PKG_GO_VERSION_ID),$(GO_OS_ARCH),$(PKG_GO_INSTALL_SUFFIX)))
define Host/Prepare
ifeq ($(USE_DEFAULT_BOOTSTRAP),1)
$(eval $(call GoCompiler/AddProfile,Bootstrap,$(BOOTSTRAP_BUILD_DIR),,bootstrap,$(GO_HOST_OS_ARCH)))
$(eval $(call Download,golang-bootstrap))
define Host/Prepare
$(call Host/Prepare/Default)
mkdir -p $(BOOTSTRAP_BUILD_DIR)
$(BOOTSTRAP_UNPACK)
endef
endef
endif
# when https://github.com/golang/go/issues/31544 is fixed,
# we should be able to set GO_LDFLAGS=-buildmode=pie for host make
@ -212,7 +236,7 @@ define Host/Compile
)
$(call GoCompiler/Host/Make, \
GOROOT_BOOTSTRAP=$(BOOTSTRAP_BUILD_DIR) \
GOROOT_BOOTSTRAP=$(if $(USE_DEFAULT_BOOTSTRAP),$(BOOTSTRAP_BUILD_DIR),$(EXTERNAL_BOOTSTRAP_DIR)) \
GOCACHE=$(HOST_GO_CACHE_DIR) \
CC=$(HOSTCC_NOCACHE) \
CXX=$(HOSTCXX_NOCACHE) \