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authorGravatar Thomas Petazzoni <thomas.petazzoni@bootlin.com>2018-12-28 18:01:30 +0100
committerGravatar Thomas Petazzoni <thomas.petazzoni@bootlin.com>2019-01-01 11:16:10 +0100
commitf75239d1b59ca1e6d821eeeda10cd4653a7ab78c (patch)
treed278bd8be3ed2ba1161b1c84c2269dc185aa6c76
parent331a23041de73d449f9892e4fd97f2fcf414d6de (diff)
downloadbuildroot-f75239d1b59ca1e6d821eeeda10cd4653a7ab78c.tar.gz
buildroot-f75239d1b59ca1e6d821eeeda10cd4653a7ab78c.tar.bz2
package/pkg-python: use host-python3-setuptools when needed
When a package uses "setuptools" as its <pkg>_SETUP_TYPE, we currently add a dependency on host-python-setuptools. This means that: (1) When BR2_PACKAGE_PYTHON=y, the default host Python version is Python 2.x, and host-python-setuptools is installed for host-python. (2) When BR2_PACKAGE_PYTHON3=y, the default host Python version is Python 3.x, and host-python-setuptools is installed for host-python3. (3) When no target Python interpreter is selected, the default host Python version is Python 2.x, and host-python-setuptools is installed for host-python. Situations (1) and (3) are problematic for host Python packages that need Python 3.x. Such packages use <pkg>_NEEDS_HOST_PYTHON = python3, but if they use setuptools as their setup type, they will not find setuptools installed for host-python3 in situations (1) and (3) described above. We currently have a single package that sets <pkg>_NEEDS_HOST_PYTHON = python3: host-meson. host-meson generally works because if setuptools is not found, it falls back to distutils, which is part of the standard Python library. However, if there is a setuptools version installed system-wide, it may be picked up, but may not necessarily be the same version as Buildroot setuptools, potentially causing problems. This commit makes the necessary change to the python-package infrastructure to fix this behavior, by identifying the following cases: - When a host Python package says <pkg>_NEEDS_HOST_PYTHON = python3, then we know it wants setuptools installed for host-python3, so we use host-python3-setuptools. - When a host Python package says <pkg>_NEEDS_HOST_PYTHON = python2, then we known it wants setuptools installed for host-python, so we use host-python-setuptools. - When BR2_PACKAGE_PYTHON3=y, and we have a target package, or a host package with no NEEDS_HOST_PYTHON option, then we want setuptools installed for host-python3, so we use host-python3-setuptools. - When BR2_PACKAGE_PYTHON=y or no target interpreter is enabled at all, and we have a target package, or a host package with no NEEDS_HOST_PYTHON option, then we want setuptools for host-python, so we use host-python-setuptools. To make this happen, we use host-python3-setuptools introduced in a previous commit, but we also change host-python-setuptools to force its installation for host-python. The latter is needed if you build with BR2_PACKAGE_PYTHON3=y but want to install a Python-based package that has NEEDS_HOST_PYTHON=python2. There is one single package that needs be adjusted following this: lirc-tools, because it is not using the python-package infrastructure. It directly depends on host-python-setuptools, which no longer works because host-python-setuptools now only installs for Python 2.x, while lirc-tools Python binding only supports Python 3.x. Switching to host-python3-setuptools solves this problem. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Reviewed-by: Asaf Kahlon <asafka7@gmail.com> Reviewed-by: Yegor Yefremov <yegorslists@googlemail.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
-rw-r--r--package/lirc-tools/lirc-tools.mk2
-rw-r--r--package/pkg-python.mk35
-rw-r--r--package/python-setuptools/python-setuptools.mk1
3 files changed, 29 insertions, 9 deletions
diff --git a/package/lirc-tools/lirc-tools.mk b/package/lirc-tools/lirc-tools.mk
index a5165ad438..e468f2a25d 100644
--- a/package/lirc-tools/lirc-tools.mk
+++ b/package/lirc-tools/lirc-tools.mk
@@ -46,7 +46,7 @@ LIRC_TOOLS_DEPENDENCIES += libftdi1
endif
ifeq ($(BR2_PACKAGE_PYTHON3),y)
-LIRC_TOOLS_DEPENDENCIES += python3 host-python-setuptools
+LIRC_TOOLS_DEPENDENCIES += python3 host-python3-setuptools
LIRC_TOOLS_MAKE_ENV += SETUPTOOLS_ENV="$(PKG_PYTHON_SETUPTOOLS_ENV)"
endif
diff --git a/package/pkg-python.mk b/package/pkg-python.mk
index 1ee465ba5d..af8b86968d 100644
--- a/package/pkg-python.mk
+++ b/package/pkg-python.mk
@@ -180,16 +180,35 @@ endif
endif # ($$($(2)_NEEDS_HOST_PYTHON),)
endif # ($(4),target)
-# Setuptools based packages will need host-python-setuptools (both
-# host and target). We need to have a special exclusion for the
-# host-setuptools package itself: it is setuptools-based, but
-# shouldn't depend on host-setuptools (because it would otherwise
-# depend on itself!).
+# Setuptools based packages will need setuptools for the host Python
+# interpreter (both host and target).
+#
+# If we have a host package that says "I need Python 3", we install
+# setuptools for python3.
+#
+# If we have a host packge that says "I need Python 2", we install
+# setuptools for python2.
+#
+# If we have a target package, or a host package that doesn't have any
+# <pkg>_NEEDS_HOST_PYTHON, and BR2_PACKAGE_PYTHON3 is used, then
+# Python 3.x is the default Python interpreter, so we install
+# setuptools for python3.
+#
+# In all other cases, we install setuptools for python2. Those other
+# cases are: a target package or host package with
+# BR2_PACKAGE_PYTHON=y, or a host-package with neither
+# BR2_PACKAGE_PYTHON3=y or BR2_PACKAGE_PYTHON=y.
ifeq ($$($(2)_SETUP_TYPE),setuptools)
-ifneq ($(2),HOST_PYTHON_SETUPTOOLS)
-$(2)_DEPENDENCIES += host-python-setuptools
-endif
+ifeq ($(4):$$($(2)_NEEDS_HOST_PYTHON),host:python3)
+$(2)_DEPENDENCIES += $$(if $$(filter host-python3-setuptools,$(1)),,host-python3-setuptools)
+else ifeq ($(4):$$($(2)_NEEDS_HOST_PYTHON),host:python2)
+$(2)_DEPENDENCIES += $$(if $$(filter host-python-setuptools,$(1)),,host-python-setuptools)
+else ifeq ($$(BR2_PACKAGE_PYTHON3),y)
+$(2)_DEPENDENCIES += $$(if $$(filter host-python3-setuptools,$(1)),,host-python3-setuptools)
+else
+$(2)_DEPENDENCIES += $$(if $$(filter host-python-setuptools,$(1)),,host-python-setuptools)
endif
+endif # SETUP_TYPE
# Python interpreter to use for building the package.
#
diff --git a/package/python-setuptools/python-setuptools.mk b/package/python-setuptools/python-setuptools.mk
index cc6f991cdd..d915449c5d 100644
--- a/package/python-setuptools/python-setuptools.mk
+++ b/package/python-setuptools/python-setuptools.mk
@@ -10,6 +10,7 @@ PYTHON_SETUPTOOLS_SITE = https://files.pythonhosted.org/packages/37/1b/b25507861
PYTHON_SETUPTOOLS_LICENSE = MIT
PYTHON_SETUPTOOLS_LICENSE_FILES = LICENSE
PYTHON_SETUPTOOLS_SETUP_TYPE = setuptools
+HOST_PYTHON_SETUPTOOLS_NEEDS_HOST_PYTHON = python2
define PYTHON_SETUPTOOLS_EXTRACT_CMDS
$(UNZIP) -d $(@D) $(PYTHON_SETUPTOOLS_DL_DIR)/$(PYTHON_SETUPTOOLS_SOURCE)