在OS X上，我如何找出共享库编译的架构？

Question

我需要知道我编译的libjpeg是32位还是64位体系结构，但不知道如何找到，是否有命令可以让我检查？

- Gorann Semara

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可能是Determine if an executable (or library) is 32 -or 64-bits (on OSX)的重复问题。 - outis

Answer 1

只需输入file libjpeg.dylib，您将得到以下输出

libpoll.dylib: Mach-O universal binary with 3 architectures
libpoll.dylib (for architecture x86_64): Mach-O 64-bit dynamically linked shared library x86_64
libpoll.dylib (for architecture i386): Mach-O dynamically linked shared library i386
libpoll.dylib (for architecture ppc7400): Mach-O dynamically linked shared library ppc

- Gary

Answer 2

file命令可以完美地工作。或者，您可以使用otool打印fat headers。

$ otool -vf /usr/lib/libSystem.B.dylib
Fat headers
fat_magic FAT_MAGIC
nfat_arch 2
architecture ppc
    cputype CPU_TYPE_POWERPC
    cpusubtype CPU_SUBTYPE_POWERPC_ALL
    offset 4096
    size 2221800
    align 2^12 (4096)
architecture ppc64
    cputype CPU_TYPE_POWERPC64
    cpusubtype CPU_SUBTYPE_POWERPC64_ALL
    offset 2228224
    size 2169980
    align 2^12 (4096)

- ubiyubix

Answer 3

使用file命令：

[mqudsi@iqudsi:Xcode/FSLogger]$ file ./original                   (07-31 02:53)
./original: Mach-O executable i386

- Mahmoud Al-Qudsi