如何检查库是否是在 Mac OS X 上构建的 32 位/64 位？

Question

我在使用 PyQt/SIP 时遇到一些问题。我猜 SIP 被编译成 64 位，但 Python 在查找它时遇到了一些问题。

  File "qtdemo.py", line 46, in 
    import sip
ImportError: dlopen(/Library/Python/2.6/site-packages/sip.so, 2): no suitable image found.  Did find:
        /Library/Python/2.6/site-packages/sip.so: mach-o, but wrong architecture

• 我如何知道库 (so/dylib) 是 32 位还是 64 位？
• 我如何知道我的 Python 是 32 位还是 64 位？

Answer 1

file工具可用于识别可执行文件。

示例：

> file /Applications/TextEdit.app/Contents/MacOS/TextEdit 
/Applications/TextEdit.app/Contents/MacOS/TextEdit: Mach-O universal binary with 2 architectures
/Applications/TextEdit.app/Contents/MacOS/TextEdit (for architecture x86_64):   Mach-O 64-bit executable x86_64
/Applications/TextEdit.app/Contents/MacOS/TextEdit (for architecture i386): Mach-O executable i386

.

Answer 2

要查找您正在使用的 Python 实例中的可用架构：

$ file "$( "$(which python)" -c "import sys;print(sys.executable)" )"
/usr/bin/python: Mach-O universal binary with 3 architectures
/usr/bin/python (for architecture x86_64):  Mach-O 64-bit executable x86_64
/usr/bin/python (for architecture i386):    Mach-O executable i386
/usr/bin/python (for architecture ppc7400): Mach-O executable ppc

要查找 Python 当前运行的是 32 位还是 64 位（10.6 示例）：

$ /usr/bin/python2.6 -c "import sys;print('%x'%sys.maxint)"
7fffffffffffffff
$ arch -x86_64 /usr/bin/python2.6 -c "import sys;print('%x'%sys.maxint)"
7fffffffffffffff
$ arch -i386 /usr/bin/python2.6 -c "import sys;print('%x'%sys.maxint)"
7fffffff
$ arch -ppc /usr/bin/python2.6 -c "import sys;print('%x'%sys.maxint)"
7fffffff

对于 python3，替换 sys.maxsize 为了 sys.maxint:

$ python3 -c "import sys;print('%x'%sys.maxsize)"
7fffffff

Answer 3

lipo -info target/libexample-df07142d9bfd950a.a
input file target/libexample-df07142d9bfd950a.a is not a fat file
Non-fat file: target/libexample-df07142d9bfd950a.a is architecture: x86_64

.

或

lipo -info `which python`
Non-fat file: /usr/local/bin/python is architecture: x86_64

.

不要使用file。