pwd 		:= $(shell pwd)

# Controls how many parallel jobs are invoked in subshells
CPUS		:= $(shell nproc)
MAKE_JOBS	?= -j$(CPUS) --max-load 16

# Timestamps should be in ISO format
DATE=`date --rfc-3339=seconds`

# Some things want usernames, we use the current checkout
# so that they are reproducible
GIT_HASH	:= $(shell git rev-parse HEAD)

# Force pipelines to fail if any of the commands in the pipe fail
SHELL := /bin/bash
.SHELLFLAGS := -o pipefail -c

# Disable all built in rules
.SUFFIXES:
FORCE:

# Make helpers to operate on lists of things
define prefix =
$(foreach _, $2, $1$_)
endef
define map =
$(foreach _,$2,$(eval $(call $1,$_)))
endef