#otool

Printing object files included in the library and their exported functions

$>otool -SV /usr/local/lib/libSDL2_image.a Archive : /usr/local/lib/libSDL2_image.a Table of contents from: /usr/local/lib/libSDL2_image.a(__.SYMDEF SORTED) size of ranlib structures: 392 (number 49) size of strings: 696 object symbol name IMG.o _IMG_Init IMG_jpg.o _IMG_InitJPG IMG_png.o _IMG_InitPNG IMG_tif.o _IMG_InitTIF IMG_webp.o _IMG_InitWEBP IMG.o _IMG_Linked_Version IMG.o _IMG_Load IMG_bmp.o _IMG_LoadBMP_RW IMG_bmp.o _IMG_LoadCUR_RW ...

Printing shared libraries used

$> otool -L /usr/local/lib/libSDL2.dylib /usr/local/lib/libSDL2.dylib: /usr/local/opt/sdl2/lib/libSDL2-2.0.0.dylib (compatibility version 5.0.0, current version 5.0.0) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1226.10.1) /usr/lib/libiconv.2.dylib (compatibility version 7.0.0, current version 7.0.0) /usr/lib/libobjc.A.dylib (compatibility version 1.0.0, current version 228.0.0) /System/Library/Frameworks/ForceFeedback.framework/Versions/A/ForceFeedback (compatibility version 1.0.0, current version 1.0.2) /System/Library/Frameworks/CoreVideo.framework/Versions/A/CoreVideo (compatibility version 1.2.0, current version 1.5.0) /System/Library/Frameworks/Cocoa.framework/Versions/A/Cocoa (compatibility version 1.0.0, current version 22.0.0) ...

Printing invoked external functions from executable

$> otool -IV testapp testapp: Indirect symbols for (__TEXT,__stubs) 38 entries address index name 0x000000010001bc0e 134 ___tolower 0x000000010001bc14 135 _fclose 0x000000010001bc1a 136 _fopen 0x000000010001bc20 137 _fread 0x000000010001bc26 138 _fseek 0x000000010001bc2c 139 _ftell 0x000000010001bc32 140 _memcpy 0x000000010001bc38 141 _memset 0x000000010001bc3e 142 _printf 0x000000010001bc44 143 _puts 0x000000010001bc4a 144 _snprintf 0x000000010001bc50 145 _strlen ...

Listing all symbols (internal/external) in binary files

nm [file] Example snippet: 0000000100001560 T _main U _memcpy U _memset U _printf U _puts U _snprintf U _strlen U dyld_stub_binder

mbp002:cpython $ md5sum /usr/bin/python e3a892c8511d5086b485aeb7e9700672 /usr/bin/python mbp002:cpython $ md5sum /opt/local/bin/python defb6eacf7bf552bef7c4033e685ec13 /opt/local/bin/python mbp002:cpython $ otool -L /usr/bin/python /usr/bin/python: /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, current version 550.29.0) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 125.2.0) mbp002:cpython $ otool -L /opt/local/bin/python /opt/local/bin/python: /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 125.2.0)

/usr/bin/python comes from original osx distribution. The framework version is probably built by me just for the sake of building python.

mbp002:cpython $ ls -l /opt/local/bin/python lrwxr-xr-x 1 root admin 18 24 May 2010 /opt/local/bin/python -> /usr/bin/python2.6 mbp002:cpython $ ls -l /usr/bin/python2.6 lrwxr-xr-x 1 root wheel 75 5 May 2010 /usr/bin/python2.6 -> ../../System/Library/Frameworks/Python.framework/Versions/2.6/bin/python2.6