package/pkg-python: deduplicate common env/opts variables

There are many varibles shared via setuptools, distutils and pep517,
combine those common env/opts variables to make them easier to
maintain.

Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/pkg-python.mk

@@ -33,78 +33,77 @@ PKG_PYTHON_HOST_PLATFORM = linux-$(PKG_PYTHON_ARCH)
 PKG_PYTHON_SYSCONFIGDATA_PATH = $(PYTHON3_PATH)/_sysconfigdata__linux_*.py
 PKG_PYTHON_SYSCONFIGDATA_NAME = `{ [ -e $(PKG_PYTHON_SYSCONFIGDATA_PATH) ] && basename $(PKG_PYTHON_SYSCONFIGDATA_PATH) .py; } || true`
 
-# Target distutils-based packages
-PKG_PYTHON_DISTUTILS_ENV = \
+# Target python packages
+PKG_PYTHON_ENV = \
+	_PYTHON_HOST_PLATFORM="$(PKG_PYTHON_HOST_PLATFORM)" \
+	_PYTHON_PROJECT_BASE="$(PYTHON3_DIR)" \
+	_PYTHON_SYSCONFIGDATA_NAME="$(PKG_PYTHON_SYSCONFIGDATA_NAME)" \
 	PATH=$(BR_PATH) \
 	$(TARGET_CONFIGURE_OPTS) \
-	LDSHARED="$(TARGET_CROSS)gcc -shared" \
 	PYTHONPATH="$(PYTHON3_PATH)" \
 	PYTHONNOUSERSITE=1 \
-	SETUPTOOLS_USE_DISTUTILS=stdlib \
-	_PYTHON_HOST_PLATFORM="$(PKG_PYTHON_HOST_PLATFORM)" \
-	_PYTHON_PROJECT_BASE="$(PYTHON3_DIR)" \
-	_PYTHON_SYSCONFIGDATA_NAME="$(PKG_PYTHON_SYSCONFIGDATA_NAME)" \
 	_python_sysroot=$(STAGING_DIR) \
 	_python_prefix=/usr \
 	_python_exec_prefix=/usr
 
+# Host python packages
+HOST_PKG_PYTHON_ENV = \
+	PATH=$(BR_PATH) \
+	PYTHONNOUSERSITE=1 \
+	$(HOST_CONFIGURE_OPTS)
+
+# Target distutils-based packages
+PKG_PYTHON_DISTUTILS_ENV = \
+	$(PKG_PYTHON_ENV) \
+	LDSHARED="$(TARGET_CROSS)gcc -shared" \
+	SETUPTOOLS_USE_DISTUTILS=stdlib \
+
 PKG_PYTHON_DISTUTILS_BUILD_OPTS = \
 	--executable=/usr/bin/python
 
-PKG_PYTHON_DISTUTILS_INSTALL_TARGET_OPTS = \
+PKG_PYTHON_DISTUTILS_INSTALL_OPTS = \
 	--install-headers=/usr/include/python$(PYTHON3_VERSION_MAJOR) \
-	--prefix=/usr \
+	--prefix=/usr
+
+PKG_PYTHON_DISTUTILS_INSTALL_TARGET_OPTS = \
+	$(PKG_PYTHON_DISTUTILS_INSTALL_OPTS) \
 	--root=$(TARGET_DIR)
 
 PKG_PYTHON_DISTUTILS_INSTALL_STAGING_OPTS = \
-	--install-headers=/usr/include/python$(PYTHON3_VERSION_MAJOR) \
-	--prefix=/usr \
+	$(PKG_PYTHON_DISTUTILS_INSTALL_OPTS) \
 	--root=$(STAGING_DIR)
 
 # Host distutils-based packages
 HOST_PKG_PYTHON_DISTUTILS_ENV = \
-	PATH=$(BR_PATH) \
-	PYTHONNOUSERSITE=1 \
-	SETUPTOOLS_USE_DISTUTILS=stdlib \
-	$(HOST_CONFIGURE_OPTS)
+	$(HOST_PKG_PYTHON_ENV) \
+	SETUPTOOLS_USE_DISTUTILS=stdlib
 
 HOST_PKG_PYTHON_DISTUTILS_INSTALL_OPTS = \
 	--prefix=$(HOST_DIR)
 
 # Target setuptools-based packages
 PKG_PYTHON_SETUPTOOLS_ENV = \
-	_PYTHON_HOST_PLATFORM="$(PKG_PYTHON_HOST_PLATFORM)" \
-	_PYTHON_PROJECT_BASE="$(PYTHON3_DIR)" \
-	_PYTHON_SYSCONFIGDATA_NAME="$(PKG_PYTHON_SYSCONFIGDATA_NAME)" \
-	PATH=$(BR_PATH) \
-	$(TARGET_CONFIGURE_OPTS) \
-	PYTHONPATH="$(PYTHON3_PATH)" \
-	PYTHONNOUSERSITE=1 \
-	SETUPTOOLS_USE_DISTUTILS=stdlib \
-	_python_sysroot=$(STAGING_DIR) \
-	_python_prefix=/usr \
-	_python_exec_prefix=/usr
+	$(PKG_PYTHON_ENV) \
+	SETUPTOOLS_USE_DISTUTILS=stdlib
 
-PKG_PYTHON_SETUPTOOLS_INSTALL_TARGET_OPTS = \
+PKG_PYTHON_SETUPTOOLS_INSTALL_OPTS = \
 	--install-headers=/usr/include/python$(PYTHON3_VERSION_MAJOR) \
 	--prefix=/usr \
 	--executable=/usr/bin/python \
-	--single-version-externally-managed \
+	--single-version-externally-managed
+
+PKG_PYTHON_SETUPTOOLS_INSTALL_TARGET_OPTS = \
+	$(PKG_PYTHON_SETUPTOOLS_INSTALL_OPTS) \
 	--root=$(TARGET_DIR)
 
 PKG_PYTHON_SETUPTOOLS_INSTALL_STAGING_OPTS = \
-	--install-headers=/usr/include/python$(PYTHON3_VERSION_MAJOR) \
-	--prefix=/usr \
-	--executable=/usr/bin/python \
-	--single-version-externally-managed \
+	$(PKG_PYTHON_SETUPTOOLS_INSTALL_OPTS) \
 	--root=$(STAGING_DIR)
 
 # Host setuptools-based packages
 HOST_PKG_PYTHON_SETUPTOOLS_ENV = \
-	PATH=$(BR_PATH) \
-	PYTHONNOUSERSITE=1 \
-	SETUPTOOLS_USE_DISTUTILS=stdlib \
-	$(HOST_CONFIGURE_OPTS)
+	$(HOST_PKG_PYTHON_ENV) \
+	SETUPTOOLS_USE_DISTUTILS=stdlib
 
 HOST_PKG_PYTHON_SETUPTOOLS_INSTALL_OPTS = \
 	--prefix=$(HOST_DIR) \
@@ -113,28 +112,21 @@ HOST_PKG_PYTHON_SETUPTOOLS_INSTALL_OPTS = \
 
 # Target pep517-based packages
 PKG_PYTHON_PEP517_ENV = \
-	_PYTHON_HOST_PLATFORM="$(PKG_PYTHON_HOST_PLATFORM)" \
-	_PYTHON_PROJECT_BASE="$(PYTHON3_DIR)" \
-	_PYTHON_SYSCONFIGDATA_NAME="$(PKG_PYTHON_SYSCONFIGDATA_NAME)" \
-	PATH=$(BR_PATH) \
-	$(TARGET_CONFIGURE_OPTS) \
-	PYTHONPATH="$(PYTHON3_PATH)" \
-	PYTHONNOUSERSITE=1 \
-	_python_sysroot=$(STAGING_DIR) \
-	_python_prefix=/usr \
-	_python_exec_prefix=/usr
+	$(PKG_PYTHON_ENV)
 
-PKG_PYTHON_PEP517_INSTALL_TARGET_OPTS = \
+PKG_PYTHON_PEP517_INSTALL_OPTS = \
 	--interpreter=/usr/bin/python \
-	--script-kind=posix \
+	--script-kind=posix
+
+PKG_PYTHON_PEP517_INSTALL_TARGET_OPTS = \
+	$(PKG_PYTHON_PEP517_INSTALL_OPTS) \
 	--purelib=$(TARGET_DIR)/usr/lib/python$(PYTHON3_VERSION_MAJOR)/site-packages \
 	--headers=$(TARGET_DIR)/usr/include/python$(PYTHON3_VERSION_MAJOR) \
 	--scripts=$(TARGET_DIR)/usr/bin \
 	--data=$(TARGET_DIR)/usr
 
 PKG_PYTHON_PEP517_INSTALL_STAGING_OPTS = \
-	--interpreter=/usr/bin/python \
-	--script-kind=posix \
+	$(PKG_PYTHON_PEP517_INSTALL_OPTS) \
 	--purelib=$(STAGING_DIR)/usr/lib/python$(PYTHON3_VERSION_MAJOR)/site-packages \
 	--headers=$(STAGING_DIR)/usr/include/python$(PYTHON3_VERSION_MAJOR) \
 	--scripts=$(STAGING_DIR)/usr/bin \
@@ -142,9 +134,7 @@ PKG_PYTHON_PEP517_INSTALL_STAGING_OPTS = \
 
 # Host pep517-based packages
 HOST_PKG_PYTHON_PEP517_ENV = \
-	PATH=$(BR_PATH) \
-	PYTHONNOUSERSITE=1 \
-	$(HOST_CONFIGURE_OPTS)
+	$(HOST_PKG_PYTHON_ENV)
 
 HOST_PKG_PYTHON_PEP517_BOOTSTRAP_INSTALL_OPTS = \
 	--installdir=$(HOST_DIR)/lib/python$(PYTHON3_VERSION_MAJOR)/site-packages