runc: new package

runC is a CLI tool for spawning and running containers according to the
OCP specification.

runC is used by the latest Docker engine versions, however, runc itself
is standalone and has no other dependencies.

https://runc.io/

Signed-off-by: Christian Stewart <christian@paral.in>
Reviewed-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/Config.in

@@ -1666,6 +1666,7 @@ menu "System tools"
 	source "package/pwgen/Config.in"
 	source "package/quota/Config.in"
 	source "package/rsyslog/Config.in"
+	source "package/runc/Config.in"
 	source "package/scrub/Config.in"
 	source "package/scrypt/Config.in"
 	source "package/smack/Config.in"

package/runc/Config.in

@@ -0,0 +1,13 @@
+config BR2_PACKAGE_RUNC
+	bool "runc"
+	depends on BR2_PACKAGE_HOST_GO_ARCH_SUPPORTS
+	depends on BR2_TOOLCHAIN_HAS_THREADS
+	help
+	  runC is a CLI tool for spawning and running containers
+	  according to the OCP specification.
+
+	  https://github.com/opencontainers/runc
+
+comment "runc needs a toolchain w/ threads"
+	depends on BR2_PACKAGE_HOST_GO_ARCH_SUPPORTS
+	depends on !BR2_TOOLCHAIN_HAS_THREADS

package/runc/runc.hash

@@ -0,0 +1,2 @@
+# Locally computed
+sha256 77f9d4df1657fecc939be0261fcccccd34d5b22c02b8a49abad23fac33b4059a  runc-v1.0.0-rc1.tar.gz

package/runc/runc.mk

@@ -0,0 +1,46 @@
+################################################################################
+#
+# runc
+#
+################################################################################
+
+RUNC_VERSION = v1.0.0-rc1
+RUNC_SITE = $(call github,opencontainers,runc,$(RUNC_VERSION))
+RUNC_LICENSE = Apache-2.0
+RUNC_LICENSE_FILES = LICENSE
+
+RUNC_DEPENDENCIES = host-go
+
+RUNC_GOPATH = "$(@D)/Godeps/_workspace"
+RUNC_MAKE_ENV = $(HOST_GO_TARGET_ENV) \
+	CGO_ENABLED=1 \
+	GOBIN="$(@D)/bin" \
+	GOPATH="$(RUNC_GOPATH)"
+
+RUNC_GLDFLAGS = \
+	-X main.gitCommit=$(RUNC_VERSION) \
+	-extldflags '-static'
+
+RUNC_GOTAGS = cgo static_build
+
+ifeq ($(BR2_PACKAGE_LIBSECCOMP),y)
+RUNC_GOTAGS += seccomp
+RUNC_DEPENDENCIES += libseccomp
+endif
+
+define RUNC_CONFIGURE_CMDS
+	mkdir -p $(RUNC_GOPATH)/src/github.com/opencontainers
+	ln -s $(@D) $(RUNC_GOPATH)/src/github.com/opencontainers/runc
+endef
+
+define RUNC_BUILD_CMDS
+	cd $(@D) && $(RUNC_MAKE_ENV) $(HOST_DIR)/usr/bin/go \
+		build -v -o $(@D)/bin/runc \
+		-tags "$(RUNC_GOTAGS)" -ldflags "$(RUNC_GLDFLAGS)" .
+endef
+
+define RUNC_INSTALL_TARGET_CMDS
+	$(INSTALL) -D -m 0755 $(@D)/bin/runc $(TARGET_DIR)/usr/bin/runc
+endef
+
+$(eval $(generic-package))