![Yann E. MORIN](/assets/img/avatar_default.png)
Similarly to what we just did for conditionally-set-empty variables, unconditionally setting empty variables serves no purpose in Makefiles, as unset variables are just expanded as empty... Even though we have numerous python packages, the speed gain was not measurable, with delta much less than the noise. Still, for consistency, we just do not set those variables. Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr> Cc: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
299 lines
10 KiB
Makefile
299 lines
10 KiB
Makefile
################################################################################
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# Python package infrastructure
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#
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# This file implements an infrastructure that eases development of
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# package .mk files for Python packages. It should be used for all
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# packages that use Python setup.py/setuptools as their build system.
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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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# In terms of implementation, this Python infrastructure requires the
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# .mk file to only specify metadata information about the package:
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# name, version, download URL, etc.
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#
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# We still allow the package .mk file to override what the different
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# steps are doing, if needed. For example, if <PKG>_BUILD_CMDS is
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# already defined, it is used as the list of commands to perform to
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# build the package, instead of the default Python behaviour. The
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# package can also define some post operation hooks.
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#
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################################################################################
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# basename does not evaluate if a file exists, so we must check to ensure
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# the _sysconfigdata__linux_*.py file exists. The "|| true" is added to return
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# an empty string if the file does not exist.
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PKG_PYTHON_SYSCONFIGDATA_PATH = $(PYTHON3_PATH)/_sysconfigdata__linux_*.py
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PKG_PYTHON_SYSCONFIGDATA_NAME = `{ [ -e $(PKG_PYTHON_SYSCONFIGDATA_PATH) ] && basename $(PKG_PYTHON_SYSCONFIGDATA_PATH) .py; } || true`
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# Target distutils-based packages
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PKG_PYTHON_DISTUTILS_ENV = \
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PATH=$(BR_PATH) \
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$(TARGET_CONFIGURE_OPTS) \
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LDSHARED="$(TARGET_CROSS)gcc -shared" \
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PYTHONPATH="$(if $(BR2_PACKAGE_PYTHON3),$(PYTHON3_PATH),$(PYTHON_PATH))" \
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PYTHONNOUSERSITE=1 \
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_PYTHON_SYSCONFIGDATA_NAME="$(PKG_PYTHON_SYSCONFIGDATA_NAME)" \
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_python_sysroot=$(STAGING_DIR) \
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_python_prefix=/usr \
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_python_exec_prefix=/usr
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PKG_PYTHON_DISTUTILS_BUILD_OPTS = \
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--executable=/usr/bin/python
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PKG_PYTHON_DISTUTILS_INSTALL_TARGET_OPTS = \
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--prefix=/usr \
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--root=$(TARGET_DIR)
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PKG_PYTHON_DISTUTILS_INSTALL_STAGING_OPTS = \
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--prefix=/usr \
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--root=$(STAGING_DIR)
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# Host distutils-based packages
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HOST_PKG_PYTHON_DISTUTILS_ENV = \
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PATH=$(BR_PATH) \
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PYTHONNOUSERSITE=1 \
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$(HOST_CONFIGURE_OPTS)
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HOST_PKG_PYTHON_DISTUTILS_INSTALL_OPTS = \
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--prefix=$(HOST_DIR)
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# Target setuptools-based packages
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PKG_PYTHON_SETUPTOOLS_ENV = \
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_PYTHON_SYSCONFIGDATA_NAME="$(PKG_PYTHON_SYSCONFIGDATA_NAME)" \
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PATH=$(BR_PATH) \
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$(TARGET_CONFIGURE_OPTS) \
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PYTHONPATH="$(if $(BR2_PACKAGE_PYTHON3),$(PYTHON3_PATH),$(PYTHON_PATH))" \
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PYTHONNOUSERSITE=1 \
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_python_sysroot=$(STAGING_DIR) \
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_python_prefix=/usr \
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_python_exec_prefix=/usr
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PKG_PYTHON_SETUPTOOLS_INSTALL_TARGET_OPTS = \
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--prefix=/usr \
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--executable=/usr/bin/python \
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--single-version-externally-managed \
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--root=$(TARGET_DIR)
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PKG_PYTHON_SETUPTOOLS_INSTALL_STAGING_OPTS = \
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--prefix=/usr \
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--executable=/usr/bin/python \
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--single-version-externally-managed \
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--root=$(STAGING_DIR)
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# Host setuptools-based packages
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HOST_PKG_PYTHON_SETUPTOOLS_ENV = \
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PATH=$(BR_PATH) \
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PYTHONNOUSERSITE=1 \
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$(HOST_CONFIGURE_OPTS)
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HOST_PKG_PYTHON_SETUPTOOLS_INSTALL_OPTS = \
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--prefix=$(HOST_DIR) \
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--root=/ \
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--single-version-externally-managed
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################################################################################
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# inner-python-package -- defines how the configuration, compilation
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# and installation of a Python package should be done, implements a
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# few hooks to tune the build process 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
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# for host packages
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# argument 3 is the uppercase package name, without the HOST_ prefix
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# for host packages
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# argument 4 is the type (target or host)
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################################################################################
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define inner-python-package
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ifndef $(2)_SETUP_TYPE
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ifdef $(3)_SETUP_TYPE
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$(2)_SETUP_TYPE = $$($(3)_SETUP_TYPE)
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else
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$$(error "$(2)_SETUP_TYPE must be set")
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endif
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endif
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# Distutils
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ifeq ($$($(2)_SETUP_TYPE),distutils)
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ifeq ($(4),target)
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$(2)_BASE_ENV = $$(PKG_PYTHON_DISTUTILS_ENV)
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$(2)_BASE_BUILD_TGT = build
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$(2)_BASE_BUILD_OPTS = $$(PKG_PYTHON_DISTUTILS_BUILD_OPTS)
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$(2)_BASE_INSTALL_TARGET_OPTS = $$(PKG_PYTHON_DISTUTILS_INSTALL_TARGET_OPTS)
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$(2)_BASE_INSTALL_STAGING_OPTS = $$(PKG_PYTHON_DISTUTILS_INSTALL_STAGING_OPTS)
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else
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$(2)_BASE_ENV = $$(HOST_PKG_PYTHON_DISTUTILS_ENV)
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$(2)_BASE_BUILD_TGT = build
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$(2)_BASE_INSTALL_OPTS = $$(HOST_PKG_PYTHON_DISTUTILS_INSTALL_OPTS)
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endif
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# Setuptools
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else ifeq ($$($(2)_SETUP_TYPE),setuptools)
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ifeq ($(4),target)
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$(2)_BASE_ENV = $$(PKG_PYTHON_SETUPTOOLS_ENV)
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$(2)_BASE_BUILD_TGT = build
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$(2)_BASE_INSTALL_TARGET_OPTS = $$(PKG_PYTHON_SETUPTOOLS_INSTALL_TARGET_OPTS)
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$(2)_BASE_INSTALL_STAGING_OPTS = $$(PKG_PYTHON_SETUPTOOLS_INSTALL_STAGING_OPTS)
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else
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$(2)_BASE_ENV = $$(HOST_PKG_PYTHON_SETUPTOOLS_ENV)
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$(2)_BASE_BUILD_TGT = build
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$(2)_BASE_INSTALL_OPTS = $$(HOST_PKG_PYTHON_SETUPTOOLS_INSTALL_OPTS)
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endif
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else
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$$(error "Invalid $(2)_SETUP_TYPE. Valid options are 'distutils' or 'setuptools'")
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endif
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# Target packages need both the python interpreter on the target (for
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# runtime) and the python interpreter on the host (for
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# compilation). However, host packages only need the python
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# interpreter on the host, whose version may be enforced by setting
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# the *_NEEDS_HOST_PYTHON variable.
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#
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# So:
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# - for target packages, we always depend on the default python interpreter
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# (the one selected by the config);
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# - for host packages:
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# - if *_NEEDS_HOST_PYTHON is not set, then we depend on use the default
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# interperter;
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# - otherwise, we depend on the one requested by *_NEEDS_HOST_PYTHON.
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#
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ifeq ($(4),target)
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$(2)_DEPENDENCIES += $$(if $$(BR2_PACKAGE_PYTHON3),host-python3 python3,host-python python)
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else
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ifeq ($$($(2)_NEEDS_HOST_PYTHON),)
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$(2)_DEPENDENCIES += $$(if $$(BR2_PACKAGE_PYTHON3),host-python3,host-python)
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else
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ifeq ($$($(2)_NEEDS_HOST_PYTHON),python2)
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$(2)_DEPENDENCIES += host-python
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else ifeq ($$($(2)_NEEDS_HOST_PYTHON),python3)
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$(2)_DEPENDENCIES += host-python3
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else
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$$(error Incorrect value '$$($(2)_NEEDS_HOST_PYTHON)' for $(2)_NEEDS_HOST_PYTHON)
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endif
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endif # ($$($(2)_NEEDS_HOST_PYTHON),)
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endif # ($(4),target)
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# Setuptools based packages will need setuptools for the host Python
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# interpreter (both host and target).
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#
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# If we have a host package that says "I need Python 3", we install
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# setuptools for python3.
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#
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# If we have a host packge that says "I need Python 2", we install
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# setuptools for python2.
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#
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# If we have a target package, or a host package that doesn't have any
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# <pkg>_NEEDS_HOST_PYTHON, and BR2_PACKAGE_PYTHON3 is used, then
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# Python 3.x is the default Python interpreter, so we install
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# setuptools for python3.
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#
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# In all other cases, we install setuptools for python2. Those other
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# cases are: a target package or host package with
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# BR2_PACKAGE_PYTHON=y, or a host-package with neither
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# BR2_PACKAGE_PYTHON3=y or BR2_PACKAGE_PYTHON=y.
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ifeq ($$($(2)_SETUP_TYPE),setuptools)
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ifeq ($(4):$$($(2)_NEEDS_HOST_PYTHON),host:python3)
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$(2)_DEPENDENCIES += $$(if $$(filter host-python3-setuptools,$(1)),,host-python3-setuptools)
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else ifeq ($(4):$$($(2)_NEEDS_HOST_PYTHON),host:python2)
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$(2)_DEPENDENCIES += $$(if $$(filter host-python-setuptools,$(1)),,host-python-setuptools)
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else ifeq ($$(BR2_PACKAGE_PYTHON3),y)
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$(2)_DEPENDENCIES += $$(if $$(filter host-python3-setuptools,$(1)),,host-python3-setuptools)
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else
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$(2)_DEPENDENCIES += $$(if $$(filter host-python-setuptools,$(1)),,host-python-setuptools)
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endif
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endif # SETUP_TYPE
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# Python interpreter to use for building the package.
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#
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# We may want to specify the python interpreter to be used for building a
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# package, especially for host-packages (target packages must be built using
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# the same version of the interpreter as the one installed on the target).
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#
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# So:
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# - for target packages, we always use the default python interpreter (which
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# is the same version as the one built and installed on the target);
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# - for host packages:
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# - if *_NEEDS_HOST_PYTHON is not set, then we use use the default
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# interperter;
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# - otherwise, we use the one requested by *_NEEDS_HOST_PYTHON.
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#
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ifeq ($(4),target)
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$(2)_PYTHON_INTERPRETER = $$(HOST_DIR)/bin/python
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else
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ifeq ($$($(2)_NEEDS_HOST_PYTHON),)
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$(2)_PYTHON_INTERPRETER = $$(HOST_DIR)/bin/python
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else
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$(2)_PYTHON_INTERPRETER = $$(HOST_DIR)/bin/$$($(2)_NEEDS_HOST_PYTHON)
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endif
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endif
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#
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# Build step. Only define it if not already defined by the package .mk
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# file.
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#
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ifndef $(2)_BUILD_CMDS
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define $(2)_BUILD_CMDS
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(cd $$($$(PKG)_BUILDDIR)/; \
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$$($$(PKG)_BASE_ENV) $$($$(PKG)_ENV) \
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$$($(2)_PYTHON_INTERPRETER) setup.py \
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$$($$(PKG)_BASE_BUILD_TGT) \
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$$($$(PKG)_BASE_BUILD_OPTS) $$($$(PKG)_BUILD_OPTS))
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endef
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endif
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#
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# Host installation step. Only define it if not already defined by the
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# package .mk file.
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#
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ifndef $(2)_INSTALL_CMDS
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define $(2)_INSTALL_CMDS
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(cd $$($$(PKG)_BUILDDIR)/; \
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$$($$(PKG)_BASE_ENV) $$($$(PKG)_ENV) \
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$$($(2)_PYTHON_INTERPRETER) setup.py install \
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$$($$(PKG)_BASE_INSTALL_OPTS) $$($$(PKG)_INSTALL_OPTS))
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endef
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endif
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#
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# Target installation step. Only define it if not already defined by
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# the package .mk file.
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#
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ifndef $(2)_INSTALL_TARGET_CMDS
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define $(2)_INSTALL_TARGET_CMDS
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(cd $$($$(PKG)_BUILDDIR)/; \
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$$($$(PKG)_BASE_ENV) $$($$(PKG)_ENV) \
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$$($(2)_PYTHON_INTERPRETER) setup.py install --no-compile \
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$$($$(PKG)_BASE_INSTALL_TARGET_OPTS) \
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$$($$(PKG)_INSTALL_TARGET_OPTS))
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endef
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endif
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#
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# Staging installation step. Only define it if not already defined by
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# the package .mk file.
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#
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ifndef $(2)_INSTALL_STAGING_CMDS
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define $(2)_INSTALL_STAGING_CMDS
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(cd $$($$(PKG)_BUILDDIR)/; \
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$$($$(PKG)_BASE_ENV) $$($$(PKG)_ENV) \
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$$($(2)_PYTHON_INTERPRETER) setup.py install \
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$$($$(PKG)_BASE_INSTALL_STAGING_OPTS) \
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$$($$(PKG)_INSTALL_STAGING_OPTS))
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endef
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endif
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# Call the generic package infrastructure to generate the necessary
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# make targets
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$(call inner-generic-package,$(1),$(2),$(3),$(4))
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endef
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################################################################################
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# python-package -- the target generator macro for Python packages
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################################################################################
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python-package = $(call inner-python-package,$(pkgname),$(call UPPERCASE,$(pkgname)),$(call UPPERCASE,$(pkgname)),target)
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host-python-package = $(call inner-python-package,host-$(pkgname),$(call UPPERCASE,host-$(pkgname)),$(call UPPERCASE,$(pkgname)),host)
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