kumquat-buildroot/package/pkg-python.mk
Peter Korsgaard 27bc8868f2 pkg-python: improve error handling
Make the python packing a bit easier to use by providing a detailed error
message if <pkg>_SETUP_TYPE isn't set to a valid value.

At the same time adjust the error message used when <pkg>_SETUP_TIME isn't
set to list the exact variable name that should be set, and don't talk about
'Unknown' as it isn't printed when the variable isn't set (or is set to the
empty string).

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2013-12-15 16:21:19 +01:00

222 lines
7.5 KiB
Makefile

################################################################################
# Python package infrastructure
#
# This file implements an infrastructure that eases development of
# package .mk files for Python packages. It should be used for all
# packages that use Python setup.py/setuptools as their build system.
#
# See the Buildroot documentation for details on the usage of this
# infrastructure
#
# In terms of implementation, this Python infrastructure requires the
# .mk file to only specify metadata informations about the package:
# name, version, download URL, etc.
#
# We still allow the package .mk file to override what the different
# steps are doing, if needed. For example, if <PKG>_BUILD_CMDS is
# already defined, it is used as the list of commands to perform to
# build the package, instead of the default Python behaviour. The
# package can also define some post operation hooks.
#
################################################################################
# Target distutils-based packages
PKG_PYTHON_DISTUTILS_ENV = \
PATH="$(TARGET_PATH)" \
CC="$(TARGET_CC)" \
CFLAGS="$(TARGET_CFLAGS)" \
LDFLAGS="$(TARGET_LDFLAGS)" \
LDSHARED="$(TARGET_CROSS)gcc -shared" \
CROSS_COMPILING=yes \
_python_sysroot=$(STAGING_DIR) \
_python_srcdir=$(PYTHON_DIR) \
_python_prefix=/usr \
_python_exec_prefix=/usr
PKG_PYTHON_DISTUTILS_BUILD_OPT = \
--executable=/usr/bin/python
PKG_PYTHON_DISTUTILS_INSTALL_OPT = \
--prefix=$(TARGET_DIR)/usr
# Host distutils-based packages
HOST_PKG_PYTHON_DISTUTILS_ENV = \
PATH="$(HOST_PATH)"
HOST_PKG_PYTHON_DISTUTILS_INSTALL_OPT = \
--prefix=$(HOST_DIR)/usr
# Target setuptools-based packages
PKG_PYTHON_SETUPTOOLS_ENV = \
PATH="$(TARGET_PATH)" \
PYTHONPATH="$(TARGET_DIR)/usr/lib/python$(PYTHON_VERSION_MAJOR)/site-packages" \
PYTHONXCPREFIX="$(STAGING_DIR)/usr/"
PKG_PYTHON_SETUPTOOLS_INSTALL_OPT = \
--prefix=$(TARGET_DIR)/usr \
--executable=/usr/bin/python \
--single-version-externally-managed \
--root=/
# Host setuptools-based packages
HOST_PKG_PYTHON_SETUPTOOLS_ENV = \
PATH="$(HOST_PATH)" \
PYTHONXCPREFIX="$(HOST_DIR)/usr/"
HOST_PKG_PYTHON_SETUPTOOLS_INSTALL_OPT = \
--prefix=$(HOST_DIR)/usr
################################################################################
# inner-python-package -- defines how the configuration, compilation
# and installation of a Python package should be done, implements a
# few hooks to tune the build process and calls the generic package
# infrastructure to generate the necessary make targets
#
# argument 1 is the lowercase package name
# argument 2 is the uppercase package name, including an HOST_ prefix
# for host packages
# argument 3 is the uppercase package name, without the HOST_ prefix
# for host packages
# argument 4 is the package directory prefix
# argument 5 is the type (target or host)
################################################################################
define inner-python-package
$(2)_SRCDIR = $$($(2)_DIR)/$($(2)_SUBDIR)
$(2)_BUILDDIR = $$($(2)_SRCDIR)
$(2)_ENV ?=
$(2)_BUILD_OPT ?=
$(2)_INSTALL_OPT ?=
ifndef $(2)_SETUP_TYPE
ifdef $(3)_SETUP_TYPE
$(2)_SETUP_TYPE = $($(3)_SETUP_TYPE)
else
$$(error "$(2)_SETUP_TYPE must be set")
endif
endif
# Distutils
ifeq ($$($(2)_SETUP_TYPE),distutils)
ifeq ($(5),target)
$(2)_BASE_ENV = $$(PKG_PYTHON_DISTUTILS_ENV)
$(2)_BASE_BUILD_TGT = build
$(2)_BASE_BUILD_OPT = $$(PKG_PYTHON_DISTUTILS_BUILD_OPT)
$(2)_BASE_INSTALL_OPT = $$(PKG_PYTHON_DISTUTILS_INSTALL_OPT)
else
$(2)_BASE_ENV = $$(HOST_PKG_PYTHON_DISTUTILS_ENV)
$(2)_BASE_BUILD_TGT = build
$(2)_BASE_BUILD_OPT =
$(2)_BASE_INSTALL_OPT = $$(HOST_PKG_PYTHON_DISTUTILS_INSTALL_OPT)
endif
# Setuptools
else ifeq ($$($(2)_SETUP_TYPE),setuptools)
ifeq ($(5),target)
$(2)_BASE_ENV = $$(PKG_PYTHON_SETUPTOOLS_ENV)
$(2)_BASE_BUILD_TGT = build -x
$(2)_BASE_BUILD_OPT =
$(2)_BASE_INSTALL_OPT = $$(PKG_PYTHON_SETUPTOOLS_INSTALL_OPT)
else
$(2)_BASE_ENV = $$(HOST_PKG_PYTHON_SETUPTOOLS_ENV)
$(2)_BASE_BUILD_TGT = build
$(2)_BASE_BUILD_OPT =
$(2)_BASE_INSTALL_OPT = $$(HOST_PKG_PYTHON_SETUPTOOLS_INSTALL_OPT)
endif
else
$$(error "Invalid $(2)_SETUP_TYPE. Valid options are 'distutils' or 'setuptools'")
endif
# The below statement intends to calculate the dependencies of host
# packages by derivating them from the dependencies of the
# corresponding target package, after adding the 'host-' prefix in
# front of the dependencies.
#
# However it must be repeated from inner-generic-package, as we need
# to exclude the python, host-python, host-python-setuptools and
# host-distutilscross packages, which are added below in the list of
# dependencies depending on the package characteristics, and shouldn't
# be derived automatically from the dependencies of the corresponding
# target package. For example, target packages need
# host-python-distutilscross, but not host packages.
$(2)_DEPENDENCIES ?= $(filter-out host-python host-python-setuptools host-python-distutilscross $(1),$(patsubst host-host-%,host-%,$(addprefix host-,$($(3)_DEPENDENCIES))))
# Target packages need both the python interpreter on the target (for
# runtime) and the python interpreter on the host (for
# compilation). However, host packages only need the python
# interpreter on the host.
ifeq ($(5),target)
$(2)_DEPENDENCIES += host-python python
else
$(2)_DEPENDENCIES += host-python
endif
# Setuptools based packages will need host-python-setuptools (both
# host and target) and host-python-distutilscross (only target
# packages). We need to have a special exclusion for the
# host-setuptools package itself: it is setuptools-based, but
# shouldn't depend on host-setuptools (because it would otherwise
# depend on itself!).
ifeq ($$($(2)_SETUP_TYPE),setuptools)
ifneq ($(2),HOST_PYTHON_SETUPTOOLS)
$(2)_DEPENDENCIES += host-python-setuptools
ifeq ($(5),target)
$(2)_DEPENDENCIES += host-python-distutilscross
endif
endif
endif
#
# Build step. Only define it if not already defined by the package .mk
# file.
#
ifndef $(2)_BUILD_CMDS
define $(2)_BUILD_CMDS
(cd $$($$(PKG)_BUILDDIR)/; \
$$($$(PKG)_BASE_ENV) $$($$(PKG)_ENV) \
$(HOST_DIR)/usr/bin/python setup.py \
$$($$(PKG)_BASE_BUILD_TGT) \
$$($$(PKG)_BASE_BUILD_OPT) $$($$(PKG)_BUILD_OPT))
endef
endif
#
# Host installation step. Only define it if not already defined by the
# package .mk file.
#
ifndef $(2)_INSTALL_CMDS
define $(2)_INSTALL_CMDS
(cd $$($$(PKG)_BUILDDIR)/; \
$$($$(PKG)_BASE_ENV) $$($$(PKG)_ENV) \
$(HOST_DIR)/usr/bin/python setup.py install \
$$($$(PKG)_BASE_INSTALL_OPT) $$($$(PKG)_INSTALL_OPT))
endef
endif
#
# Target installation step. Only define it if not already defined by
# the package .mk file.
#
ifndef $(2)_INSTALL_TARGET_CMDS
define $(2)_INSTALL_TARGET_CMDS
(cd $$($$(PKG)_BUILDDIR)/; \
$$($$(PKG)_BASE_ENV) $$($$(PKG)_ENV) \
$(HOST_DIR)/usr/bin/python setup.py install \
$$($$(PKG)_BASE_INSTALL_OPT) $$($$(PKG)_INSTALL_OPT))
endef
endif
# Call the generic package infrastructure to generate the necessary
# make targets
$(call inner-generic-package,$(1),$(2),$(3),$(4),$(5))
endef
################################################################################
# python-package -- the target generator macro for Python packages
################################################################################
python-package = $(call inner-python-package,$(call pkgname),$(call UPPERCASE,$(call pkgname)),$(call UPPERCASE,$(call pkgname)),$(call pkgparentdir),target)
host-python-package = $(call inner-python-package,host-$(call pkgname),$(call UPPERCASE,host-$(call pkgname)),$(call UPPERCASE,$(call pkgname)),$(call pkgparentdir),host)