注意：使用easy_install、其他安装方式时也会出现同样的错误...
我面临着几乎完全相同的问题，因为我试图将 psycopg2 安装到 Mac OS 10.6.3 上；它声称它找不到“stdarg.h”，但我可以看到它在那里；我该怎么办？，除了我在 OSX Lion (10.7) 上并且我在 Python v2.7 上。
它似乎也与在 Mac OS X 10.7 上的虚拟环境中无法使用 pip 安装 psycopg2 有关，但我收到不同的错误消息。
我提出了一个新问题，因为适用于 OSX 10.6 的解决方案（例如http://mail.python.org/pipermail/pythonmac-sig/2009-September/021617.html）对我不起作用。
我正在尝试在 Heroku ( https://devcenter.heroku.com/articles/django ) 上为 Django 做教程，但在尝试安装 psycopg2 时遇到错误。这是跟踪：
Downloading/unpacking psycopg2
Running setup.py egg_info for package psycopg2
no previously-included directories found matching 'doc/src/_build'
Installing collected packages: psycopg2
Running setup.py install for psycopg2
building 'psycopg2._psycopg' extension
gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -isysroot /Developer/SDKs/MacOSX10.6.sdk -arch i386 -arch x86_64 -g -O2 -DNDEBUG -g -O3 -DPSYCOPG_DEFAULT_PYDATETIME=1 -DPSYCOPG_VERSION="2.4.5 (dt dec pq3 ext)" -DPG_VERSION_HEX=0x090005 -DPSYCOPG_EXTENSIONS=1 -DPSYCOPG_NEW_BOOLEAN=1 -DHAVE_PQFREEMEM=1 -I/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -I. -I/usr/include -I/usr/include/postgresql/server -c psycopg/psycopgmodule.c -o build/temp.macosx-10.6-intel-2.7/psycopg/psycopgmodule.o
In file included from /Library/Frameworks/Python.framework/Versions/2.7/include/python2.7/unicodeobject.h:4,
from /Library/Frameworks/Python.framework/Versions/2.7/include/python2.7/Python.h:85,
from ./psycopg/psycopg.h:30,
from psycopg/psycopgmodule.c:27:
/Developer/SDKs/MacOSX10.6.sdk/usr/include/stdarg.h:4:25: error: stdarg.h: No such file or directory
In file included from /Library/Frameworks/Python.framework/Versions/2.7/include/python2.7/unicodeobject.h:4,
from /Library/Frameworks/Python.framework/Versions/2.7/include/python2.7/Python.h:85,
from ./psycopg/psycopg.h:30,
from psycopg/psycopgmodule.c:27:
/Developer/SDKs/MacOSX10.6.sdk/usr/include/stdarg.h:4:25: error: stdarg.h: No such file or directory
lipo: can't figure out the architecture type of: /var/tmp//ccHla8Gp.out
error: command 'gcc-4.2' failed with exit status 1
Complete output from command /Users/AndyFang/Desktop/code/venv/bin/python -c "import setuptools;__file__='/Users/AndyFang/Desktop/code/venv/build/psycopg2/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --single-version-externally-managed --record /tmp/pip-ONvqYm-record/install-record.txt --install-headers /Users/AndyFang/Desktop/code/venv/bin/../include/site/python2.7:
running install
running build
running build_py
running build_ext
building 'psycopg2._psycopg' extension
gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -isysroot /Developer/SDKs/MacOSX10.6.sdk -arch i386 -arch x86_64 -g -O2 -DNDEBUG -g -O3 -DPSYCOPG_DEFAULT_PYDATETIME=1 -DPSYCOPG_VERSION="2.4.5 (dt dec pq3 ext)" -DPG_VERSION_HEX=0x090005 -DPSYCOPG_EXTENSIONS=1 -DPSYCOPG_NEW_BOOLEAN=1 -DHAVE_PQFREEMEM=1 -I/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -I. -I/usr/include -I/usr/include/postgresql/server -c psycopg/psycopgmodule.c -o build/temp.macosx-10.6-intel-2.7/psycopg/psycopgmodule.o
In file included from /Library/Frameworks/Python.framework/Versions/2.7/include/python2.7/unicodeobject.h:4,
from /Library/Frameworks/Python.framework/Versions/2.7/include/python2.7/Python.h:85,
from ./psycopg/psycopg.h:30,
from psycopg/psycopgmodule.c:27:
/Developer/SDKs/MacOSX10.6.sdk/usr/include/stdarg.h:4:25: error: stdarg.h: No such file or directory
In file included from /Library/Frameworks/Python.framework/Versions/2.7/include/python2.7/unicodeobject.h:4,
from /Library/Frameworks/Python.framework/Versions/2.7/include/python2.7/Python.h:85,
from ./psycopg/psycopg.h:30,
from psycopg/psycopgmodule.c:27:
/Developer/SDKs/MacOSX10.6.sdk/usr/include/stdarg.h:4:25: error: stdarg.h: No such file or directory
lipo: can't figure out the architecture type of: /var/tmp//ccHla8Gp.out
error: command 'gcc-4.2' failed with exit status 1
----------------------------------------
Command /Users/AndyFang/Desktop/code/venv/bin/python -c "import setuptools;__file__='/Users/AndyFang/Desktop/code/venv/build/psycopg2/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --single-version-externally-managed --record /tmp/pip-ONvqYm-record/install-record.txt --install-headers /Users/AndyFang/Desktop/code/venv/bin/../include/site/python2.7 failed with error code 1 in /Users/AndyFang/Desktop/code/venv/build/psycopg2
Storing complete log in /Users/AndyFang/.pip/pip.log
不知道为什么找不到stdarg.h！我在网上查了很多答案，无果。