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packages/lang/rust/rust-package.mk
Jeffery To 0dfc1b508d rust: Use make's jobserver when building packages
This allows cargo to use make's jobserver when building packages, by
marking the cargo command as recursive (with the + prefix[1]) and
setting MAKEFLAGS.

This also:

* Give cargo/x.py the build directory instead of having to change the
  current directory (and opening subshells)

* Set PKG_BUILD_PARALLEL/HOST_BUILD_PARALLEL for Rust packages to enable
  the use of make's jobserver

[1]: https://www.gnu.org/software/make/manual/html_node/POSIX-Jobserver.html

Signed-off-by: Jeffery To <jeffery.to@gmail.com>
2023-10-11 15:50:24 +08:00

46 lines
1.2 KiB
Makefile

# SPDX-License-Identifier: GPL-2.0-only
#
# Copyright (C) 2023 Luca Barbato and Donald Hoskins
# Variables (all optional) to be set in package Makefiles:
#
# RUST_PKG_FEATURES - list of options, default empty
#
# Space or comma separated list of features to activate
#
# e.g. RUST_PKG_FEATURES:=enable-foo,with-bar
ifeq ($(origin RUST_INCLUDE_DIR),undefined)
RUST_INCLUDE_DIR:=$(dir $(lastword $(MAKEFILE_LIST)))
endif
include $(RUST_INCLUDE_DIR)/rust-values.mk
CARGO_PKG_VARS= \
$(CARGO_PKG_CONFIG_VARS) \
CC=$(HOSTCC_NOCACHE) \
MAKEFLAGS="$(PKG_JOBS)"
# $(1) path to the package (optional)
# $(2) additional arguments to cargo (optional)
define Build/Compile/Cargo
+$(CARGO_PKG_VARS) \
cargo install -v \
--profile $(CARGO_PKG_PROFILE) \
$(if $(strip $(RUST_PKG_FEATURES)),--features "$(strip $(RUST_PKG_FEATURES))") \
--root $(PKG_INSTALL_DIR) \
--path "$(PKG_BUILD_DIR)/$(if $(strip $(1)),$(strip $(1)))" \
$(if $(filter --jobserver%,$(PKG_JOBS)),,-j1) \
$(2)
endef
define RustBinPackage
ifndef Package/$(1)/install
define Package/$(1)/install
$$(INSTALL_DIR) $$(1)/usr/bin/
$$(INSTALL_BIN) $$(PKG_INSTALL_DIR)/bin/* $$(1)/usr/bin/
endef
endif
endef
Build/Compile=$(call Build/Compile/Cargo)