Check that the Quickfix Python module is able to find the dynamically linked libraries it requires, and suggest how to fix incorrect paths.

gistfile1.py

import logging, os, subprocess


def checkQuickfixDylibs(soPath):
	'''
	Verify that _quickfix.so's required dylibs exist, and suggest how to fix incorrect paths.
	It is assumed that missing libs (most likely just libquickfix.14.dylib) should be present
	in the same directory as _quickfix.so.
	:param soPath: path/to/_quickfix.so (or path/to/libquickfix_python.10.dylib).
	'''
	system = subprocess.check_output(('uname', '-s')).strip()
	if system == 'Darwin':
		# Mac OS X. Use otool.
		otool = subprocess.check_output(('otool', '-L', soPath)).strip()
		# Possible output:
		# path/to/_quickfix.so:
		# 	/tmp/quickfix/prefix/lib/libquickfix_python.10.dylib (compatibility version 11.0.0, current version 11.0.0)
		# 	/tmp/quickfix/src/C++/.libs/libquickfix.14.dylib (compatibility version 15.0.0, current version 15.0.0)
		# 	/usr/lib/libxml2.2.dylib (compatibility version 10.0.0, current version 10.9.0)
		# 	/usr/lib/libc++.1.dylib (compatibility version 1.0.0, current version 120.0.0)
		# 	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1197.1.1)
		libs = [ L.strip().split(' ', 1)[0] for L in otool.split('\n')[1:] ]
		logging.debug('Quickfix at path = %s requires shared libs = %r.', soPath, libs)
		for path in libs:
			if os.path.basename(path) != 'libquickfix_python.10.dylib':
				# libquickfix_python.10.dylib refers to the Python module itself and can be safely ignored.
				if not os.path.exists(path):
					possiblePath = os.path.abspath(os.path.join(os.path.dirname(soPath), os.path.basename(path)))
					fix = 'install_name_tool -change {missing} {correct} {so}'.format(missing = path, correct = possiblePath, so = soPath)
					raise RuntimeError('Shared library = {0} does not exist. Run `{1}` to fix the path.'.format(path, fix))

	elif system == 'Linux':
		# Linux. Use ldd.
		ldd = subprocess.check_output(('ldd', soPath)).strip()
		# Possible output:
		#        linux-vdso.so.1 =>  (0x00007fffa8dfe000)
		#        libquickfix.so.14 => not found
		#        libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f74a1bbb000)
		#        libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f74a18b7000)
		#        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f74a14f1000)
		#        libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f74a12da000)
		#        /lib64/ld-linux-x86-64.so.2 (0x00007f74a296e000)
		#        libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f74a0fd4000)
		lines = [ L.strip() for L in ldd.split('\n') ]
		logging.debug('Quickfix at path = %s requires shared libs = %r.', soPath, lines)
		for line in lines:
			if '=>' in line:
				name, details = line.split(' => ')
				if details == 'not found':
					possibleRpath = os.path.abspath(os.path.join(os.path.dirname(soPath)))
					fix = 'patchelf --set-rpath {rpath} {so}'.format(rpath = possibleRpath, so = soPath)
					raise RuntimeError('Shared library = {0} does not exist. Run `{1}` to fix the rpath (http://nixos.org/patchelf.html).'.format(name, fix))

	else:
		raise RuntimeError('Unknown operating system: {}'.format(system))