131 lines
4.7 KiB
Makefile
131 lines
4.7 KiB
Makefile
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################################################################################
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# Golang package infrastructure
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#
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# This file implements an infrastructure that eases development of package .mk
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# files for Go packages. It should be used for all packages that are written in
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# go.
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#
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# See the Buildroot documentation for details on the usage of this
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# infrastructure
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#
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#
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# In terms of implementation, this golang infrastructure requires the .mk file
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# to only specify metadata information about the package: name, version,
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# download URL, etc.
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#
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# We still allow the package .mk file to override what the different steps are
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# doing, if needed. For example, if <PKG>_BUILD_CMDS is already defined, it is
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# used as the list of commands to perform to build the package, instead of the
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# default golang behavior. The package can also define some post operation
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# hooks.
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#
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################################################################################
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GO_BIN = $(HOST_DIR)/bin/go
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# We pass an empty GOBIN, otherwise "go install: cannot install
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# cross-compiled binaries when GOBIN is set"
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GO_TARGET_ENV = \
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$(HOST_GO_TARGET_ENV) \
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GOBIN= \
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CGO_ENABLED=$(HOST_GO_CGO_ENABLED)
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################################################################################
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# inner-golang-package -- defines how the configuration, compilation and
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# installation of a Go package should be done, implements a few hooks to tune
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# the build process for Go specificities and calls the generic package
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# infrastructure to generate the necessary make targets
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#
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# argument 1 is the lowercase package name
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# argument 2 is the uppercase package name, including a HOST_ prefix for host
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# packages
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# argument 3 is the uppercase package name, without the HOST_ prefix for host
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# packages
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# argument 4 is the type (target or host)
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#
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# NOTE Only type target is supported at the moment
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################################################################################
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define inner-golang-package
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$(2)_WORKSPACE ?= _gopath
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ifeq ($(BR2_STATIC_LIBS),y)
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$(2)_LDFLAGS += -extldflags '-static'
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endif
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$(2)_BUILD_OPTS += -ldflags "$$($(2)_LDFLAGS)"
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$(2)_BUILD_OPTS += -tags "$$($(2)_TAGS)"
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# Target packages need the Go compiler on the host.
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$(2)_DEPENDENCIES += host-go
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$(2)_BUILD_TARGETS ?= .
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$(2)_INSTALL_BINS ?= $(1)
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# The go build/install command installs the binaries inside
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# gopath/bin/linux_GOARCH/ when cross compilation is enabled. We set this
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# variable here to be used by packages if needed.
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$(2)_BINDIR = $$($(2)_WORKSPACE)/bin/linux_$$(GO_GOARCH)
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# Source files in Go should be extracted in a precise folder in the hierarchy
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# of GOPATH. It usually resolves around domain/vendor/software. By default, we
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# derive domain/vendor/software from the upstream URL of the project, but we
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# allow $(2)_SRC_SUBDIR to be overridden if needed.
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$(2)_SRC_DOMAIN = $$(call domain,$($(2)_SITE))
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$(2)_SRC_VENDOR = $$(word 1,$$(subst /, ,$$(call notdomain,$($(2)_SITE))))
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$(2)_SRC_SOFTWARE = $$(word 2,$$(subst /, ,$$(call notdomain,$($(2)_SITE))))
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$(2)_SRC_SUBDIR ?= $$($(2)_SRC_DOMAIN)/$$($(2)_SRC_VENDOR)/$$($(2)_SRC_SOFTWARE)
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$(2)_SRC_PATH = $$(@D)/$$($(2)_WORKSPACE)/src/$$($(2)_SRC_SUBDIR)
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# Configure step. Only define it if not already defined by the package .mk
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# file.
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ifndef $(2)_CONFIGURE_CMDS
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define $(2)_CONFIGURE_CMDS
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mkdir -p $$(@D)/$$($(2)_WORKSPACE)/bin
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mkdir -p $$(dir $$($(2)_SRC_PATH))
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ln -sf $$(@D) $$($(2)_SRC_PATH)
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endef
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endif
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# Build step. Only define it if not already defined by the package .mk file. We
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# use the install command instead of build command here because the install
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# command just moves the package binaries into <workspace>/bin/linux_GOARCH/.
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# This leverages the go build infrastructure for building and installing
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# multiple binaries.
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ifndef $(2)_BUILD_CMDS
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define $(2)_BUILD_CMDS
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$$(foreach d,$$($(2)_BUILD_TARGETS),\
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cd $$($(2)_SRC_PATH); \
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$$(GO_TARGET_ENV) \
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GOPATH="$$(@D)/$$($(2)_WORKSPACE)" \
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$$($(2)_GO_ENV) \
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$$(GO_BIN) install -v $$($(2)_BUILD_OPTS) ./$$(d)
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)
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endef
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endif
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# Target installation step. Only define it if not already defined by the
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# package .mk file.
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ifndef $(2)_INSTALL_TARGET_CMDS
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define $(2)_INSTALL_TARGET_CMDS
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$$(foreach d,$$($(2)_INSTALL_BINS),\
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$(INSTALL) -D -m 0755 $$(@D)/$$($(2)_BINDIR)/$$(d) $(TARGET_DIR)/usr/bin/$$(d)
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)
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endef
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endif
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# Call the generic package infrastructure to generate the necessary make
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# targets
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$(call inner-generic-package,$(1),$(2),$(3),$(4))
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endef # inner-golang-package
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################################################################################
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# golang-package -- the target generator macro for Go packages
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################################################################################
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golang-package = $(call inner-golang-package,$(pkgname),$(call UPPERCASE,$(pkgname)),$(call UPPERCASE,$(pkgname)),target)
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