python: add capability to install python packages for the host

Some python packages (e.g. cffi) compile one or more shared libraries
as part of their setup process. When these packages are setup
dependencies of other packages (e.g. cryptography), these packages (and
their shared libraries) will need to be loaded on the host system.

This adds a makefile, similar to python-package.mk, to simplify
installing python packages on the host.

Signed-off-by: Jeffery To <jeffery.to@gmail.com>

diff --git a/lang/python/Makefile b/lang/python/Makefile
index 698f4bee6d5736aa22f417db7c4879f26e1f2b3e..29e93a0376427ce2a26ec4d6289fcac93f47ce2e 100644 (file)
--- a/lang/python/Makefile
+++ b/lang/python/Makefile
@@ -138,7 +138,10 @@ define Build/InstallDev
        $(INSTALL_DIR) $(STAGING_DIR)/mk/
        $(INSTALL_DIR) $(1)/usr/include/ $(1)/usr/lib/ $(1)/usr/lib/pkgconfig
        $(INSTALL_DIR) $(1)/usr/lib/python$(PYTHON_VERSION)/
-       $(INSTALL_DATA) ./files/python-package.mk $(STAGING_DIR)/mk/
+       $(INSTALL_DATA) \
+               ./files/python-package.mk \
+               ./files/python-host.mk \
+               $(STAGING_DIR)/mk/
        $(CP) \
                $(PKG_INSTALL_DIR)/usr/include/python$(PYTHON_VERSION) \
                $(1)/usr/include/

diff --git a/lang/python/files/python-host.mk b/lang/python/files/python-host.mk
new file mode 100644 (file)
index 0000000..ed0ef41
--- /dev/null
+++ b/lang/python/files/python-host.mk
@@ -0,0 +1,53 @@
+#
+# Copyright (C) 2015 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+HOST_PYTHON_INC_DIR:=$(STAGING_DIR_HOST)/include/python$(PYTHON_VERSION)
+
+HOST_PYTHON_PKG_DIR:=/lib/python$(PYTHON_VERSION)/site-packages
+
+HOST_PYTHONPATH:=$(HOST_PYTHON_LIB_DIR):$(STAGING_DIR_HOST)/$(HOST_PYTHON_PKG_DIR)
+define HostHostPython
+       (       export PYTHONPATH="$(HOST_PYTHONPATH)"; \
+               export PYTHONOPTIMIZE=""; \
+               export PYTHONDONTWRITEBYTECODE=1; \
+               export _python_sysroot="$(STAGING_DIR_HOST)"; \
+               export _python_prefix=""; \
+               export _python_exec_prefix=""; \
+               $(1) \
+               $(HOST_PYTHON_BIN) $(2); \
+       )
+endef
+
+# These configure args are needed in detection of path to Python header files
+# using autotools.
+HOST_CONFIGURE_ARGS += \
+       _python_sysroot="$(STAGING_DIR_HOST)" \
+       _python_prefix="" \
+       _python_exec_prefix=""
+
+# $(1) => build subdir
+# $(2) => additional arguments to setup.py
+# $(3) => additional variables
+define Build/Compile/HostPyMod
+       $(call HostHostPython, \
+               cd $(HOST_BUILD_DIR)/$(strip $(1)); \
+               CC="$(HOSTCC)" \
+               CCSHARED="$(HOSTCC) $(HOST_FPIC)" \
+               CXX="$(HOSTCXX)" \
+               LD="$(HOSTCC)" \
+               LDSHARED="$(HOSTCC) -shared" \
+               CFLAGS="$(HOST_CFLAGS)" \
+               CPPFLAGS="$(HOST_CPPFLAGS) -I$(HOST_PYTHON_INC_DIR)" \
+               LDFLAGS="$(HOST_LDFLAGS) -lpython$(PYTHON_VERSION)" \
+               _PYTHON_HOST_PLATFORM=linux2 \
+               __PYVENV_LAUNCHER__="/usr/bin/$(PYTHON)" \
+               $(3) \
+               , \
+               ./setup.py $(2) \
+       )
+endef
+