host_cffi: custom cffi module to be used within hostpython

recipes/cffi/__init__.py

@@ -6,6 +6,7 @@ import sh
 
 
 class CffiRecipe(CythonRecipe):
+    depends = ["host_cffi"]
     name = "cffi"
     version = "1.8.3"
     url = (

recipes/host_cffi/__init__.py

@@ -0,0 +1,66 @@
+from os.path import join
+from toolchain import Recipe
+from toolchain import shprint
+import os
+import sh
+
+libffi_tpl = """
+prefix=%PREFIX%
+exec_prefix=${prefix}
+libdir=${exec_prefix}/build/Release
+includedir=${libdir}/build_macosx-x86_64/include
+
+Name: libffi
+Description: Library supporting Foreign Function Interfaces
+Version: %VERSION%
+Libs: -L${libdir} -lffi
+Cflags: -I${includedir}
+"""
+
+class HostCffiRecipe(Recipe):
+    name = "host_cffi"
+    version = "1.8.3"
+    archs = ["x86_64"]
+    url = (
+        "https://pypi.python.org/packages/0a/f3/"
+        "686af8873b70028fccf67b15c78fd4e4667a3da995007afc71e786d61b0a/"
+        "cffi-{version}.tar.gz"
+    )
+    depends = ["libffi", "host_setuptools", "pycparser"]
+
+    def get_recipe_env(self, arch):
+        sdk_path = sh.xcrun("--sdk", "macosx", "--show-sdk-path").strip()
+        env = super(HostCffiRecipe, self).get_recipe_env(arch)
+        env["CC"] = "clang -Qunused-arguments -fcolor-diagnostics"
+        env["LDFLAGS"] = " ".join([
+                "-undefined dynamic_lookup",
+                "-shared",
+                "-L{}".format(join(self.ctx.dist_dir, "hostlibffi", "usr", "local", "lib"))
+                ])
+        env["CFLAGS"] = " ".join([
+                "--sysroot={}".format(sdk_path),
+                "-I{}".format(join(self.ctx.dist_dir, "hostlibffi", "usr", "local", "include"))
+                ])
+        return env
+
+    def prebuild_arch(self, arch):
+        hostpython = sh.Command(self.ctx.hostpython)
+        build_dir = self.get_build_dir(arch.arch)
+        build_env = self.get_recipe_env(arch)
+        os.chdir(build_dir)
+
+        # generate a fake libffi pkg-config to let cffi use it
+        hostlibffi = Recipe.get_recipe("hostlibffi", self.ctx)
+        with open("libffi.pc", "w") as fd:
+            tpl = libffi_tpl.replace("%PREFIX%",
+                    hostlibffi.get_build_dir(arch.arch))
+            tpl = tpl.replace("%VERSION%", hostlibffi.version)
+            fd.write(tpl)
+
+        build_env["PKG_CONFIG"] = "/usr/local/bin/pkg-config"
+        build_env["PKG_CONFIG_PATH"] = build_dir 
+
+        shprint(hostpython, "setup.py", "build_ext", _env=build_env)
+        shprint(hostpython, "setup.py", "install", _env=build_env)
+
+recipe = HostCffiRecipe()