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-rw-r--r--setup.py95
1 files changed, 94 insertions, 1 deletions
diff --git a/setup.py b/setup.py
index 63451e8..2a3cd90 100644
--- a/setup.py
+++ b/setup.py
@@ -16,13 +16,106 @@ from distutils.core import setup, Extension
from portato.constants import FRONTENDS, VERSION, DATA_DIR, ICON_DIR, PLUGIN_DIR, TEMPLATE_DIR
### copied from shm's setup.py ###
+
+import popen2
+import tempfile
+
+# shm makes use of the ipc_perm structure defined in include/sys/ipc.h (or include/bits/ipc.h
+# on some systems). That structure includes an element called key, _key or __key depending
+# on the OS. Here's the variations I've been able to find with OS version numbers where
+# possible.
+# key: FreeBSD 6, AIX, Solaris, OS X 10.3, OS X 10.4 (conditionally)
+# _key: NetBSD, OS X 10.4 (conditionally)
+# __key: Debian 4 (Etch), Ubuntu 7, RH 3.3 & 3.4
+
+# OS X side note: OS X 10.4's ipc.h (see /Developer/SDKs/MacOSX10.4u.sdk/usr/include/sys/ipc.h)
+# defines structs called __ipc_perm_old (which uses key) and __ipc_perm_new (which uses _key).
+# Use of __ipc_perm_new is inside this:
+# #if defined(__POSIX_C_SOURCE) || defined(kernel) || defined(__LP64__)
+# Obviously __ipc_perm_new is the preferred version. This code doesn't use that yet but
+# will probably do so in some future version when compiled on OS X >= 10.4.
+
+# Trying to enumerate all of the variations is a fool's errand so instead I figure it out
+# on the fly using the function CountKeyUnderscores() below.
+
+# Lots of systems use the unadorned "key" so that's the default when I'm forced to guess.
+COUNT_KEY_UNDERSCORES_DEFAULT = 0
+
+def CountKeyUnderscores():
+ """ Uses trial-and-error with the system's C compiler to figure out the number of
+ underscores preceding key in the ipc_perm structure. Returns 0, 1 or 2. In case of
+ error, it makes a guess and hopes for the best.
+ """
+ UnderscoresCount = COUNT_KEY_UNDERSCORES_DEFAULT
+
+ underscores = { }
+
+ # mktemp isn't secure, but I don't care since I use it only for compiling this dummy code.
+ # Using mktemp() allows me to keep this code compatible with Python < 2.3.
+ path = tempfile.mktemp(dir='.')
+ os.mkdir(path)
+ if path[-1] != "/": path += '/'
+
+ # Here I compile three mini-programs with key, _key and __key. Theoretically,
+ # two should fail and one should succeed, and that will tell me how this platform names
+ # ipc_perm.key. If the number of successes != 1, something's gone wrong.
+ # I use popen2.Popen4() in order to trap (and discard) stderr so that the user doesn't
+ # see the compiler errors I'm deliberately generating here.
+ src = """
+#include <sys/ipc.h>
+int main(void) { struct ipc_perm foo; foo.%skey = 42; }
+
+"""
+ for i in range(0, 3):
+ # I'd prefer to feed the C source to the compiler via stdin so as to entirely avoid
+ # using files and directories, but I had trouble on Ubuntu getting echo to cooperate.
+ filename = "%d.c" % i
+ file(path + filename, "w").write(src % ('_' * i))
+
+ cmd = ["cc", "-c", "-o", "/dev/null", "%s" % path + filename]
+
+ po = popen2.Popen4(cmd)
+ if not po.wait(): underscores[i] = True
+
+ # Clean up
+ os.remove(path + filename)
+
+ os.rmdir(path)
+
+ KeyCount = len(underscores.keys())
+
+ if KeyCount == 1:
+ UnderscoresCount = underscores.keys()[0]
+ else:
+ print """
+*********************************************************************
+* I was unable to detect the structure of ipc_perm on your system. *
+* I'll make my best guess, but compiling might fail anyway. Please *
+* email this message, the error code of %d, and the name of your OS *
+* to the contact at http://NikitaTheSpider.com/python/shm/. *
+*********************************************************************
+""" % KeyCount
+
+ return UnderscoresCount
+
+
MacrosAndDefines = [ ]
# HAVE_UNION_SEMUN needs to be #defined on FreeBSD and OS X and must *not* be #defined
# on Linux. On other systems, I'm not sure. Please let me know if you find that you
# need to make changes for your platform.
-if ("bsd" in sys.platform) or ("darwin" in sys.platform):
+if (sys.platform.find("bsd") != -1) or (sys.platform.find("darwin") != -1):
MacrosAndDefines.append( ('HAVE_UNION_SEMUN', None) )
+
+KeyUnderscores = CountKeyUnderscores()
+
+if KeyUnderscores == 2:
+ MacrosAndDefines.append( ('TWO_UNDERSCORE_KEY', None) )
+elif KeyUnderscores == 1:
+ MacrosAndDefines.append( ('ONE_UNDERSCORE_KEY', None) )
+else:
+ MacrosAndDefines.append( ('ZERO_UNDERSCORE_KEY', None) )
+
### end copy ###
def plugin_list (*args):