# HG changeset patch
# User Barry Warsaw <barry@python.org>
# Date 1302190091 14400
# Node ID bd0f73a9538e05f526feaf05821e68bdcff498fa
# Parent  2e4cdaffe493e879fb5367a4aa454491de451137
Backport for Python 2.7 of issue 11715 support for building Python on
multiarch Debian/Ubuntu.

diff -r -u setup.py setup.py
--- setup.py.orig
+++ setup.py
@@ -15,6 +15,7 @@
 from distutils.command.build_ext import build_ext
 from distutils.command.install import install
 from distutils.command.install_lib import install_lib
+from distutils.spawn import find_executable
 
 # This global variable is used to hold the list of modules to be disabled.
 disabled_module_list = []
@@ -308,10 +309,33 @@ class PyBuildExt(build_ext):
                 return platform
         return sys.platform
 
+    def add_multiarch_paths(self):
+        # Debian/Ubuntu multiarch support.
+        # https://wiki.ubuntu.com/MultiarchSpec
+        if not find_executable('dpkg-architecture'):
+            return
+        tmpfile = os.path.join(self.build_temp, 'multiarch')
+        if not os.path.exists(self.build_temp):
+            os.makedirs(self.build_temp)
+        ret = os.system(
+            'dpkg-architecture -qDEB_HOST_MULTIARCH > %s 2> /dev/null' %
+            tmpfile)
+        try:
+            if ret >> 8 == 0:
+                with open(tmpfile) as fp:
+                    multiarch_path_component = fp.readline().strip()
+                add_dir_to_list(self.compiler.library_dirs,
+                                '/usr/lib/' + multiarch_path_component)
+                add_dir_to_list(self.compiler.include_dirs,
+                                '/usr/include/' + multiarch_path_component)
+        finally:
+            os.unlink(tmpfile)
+
     def detect_modules(self):
         # Ensure that /usr/local is always used
         add_dir_to_list(self.compiler.library_dirs, '/usr/local/lib')
         add_dir_to_list(self.compiler.include_dirs, '/usr/local/include')
+        self.add_multiarch_paths()
 
         # Add paths specified in the environment variables LDFLAGS and
         # CPPFLAGS for header and library files.
@@ -1339,14 +1363,13 @@
 
 
         # Platform-specific libraries
-        if platform == 'linux2':
+        if platform.startswith('linux'):
             # Linux-specific modules
             exts.append( Extension('linuxaudiodev', ['linuxaudiodev.c']) )
         else:
             missing.append('linuxaudiodev')
 
-        if platform in ('linux2', 'freebsd4', 'freebsd5', 'freebsd6',
-                        'freebsd7', 'freebsd8'):
+        if platform.startswith('linux') or platform.startswith('freebsd'):
             exts.append( Extension('ossaudiodev', ['ossaudiodev.c']) )
         else:
             missing.append('ossaudiodev')