def modify_object_macholib(cur_path, paths_to_paths):
"""
This function is used when install machO buildcaches on linux by
rewriting mach-o loader commands for dependency library paths of
mach-o binaries and the id path for mach-o libraries.
Rewritting of rpaths is handled by replace_prefix_bin.
Inputs
mach-o binary to be modified
dictionary mapping paths in old install layout to new install layout
"""
dll = MachO(cur_path)
changedict = paths_to_paths
def changefunc(path):
npath = changedict.get(path, None)
return npath
dll.rewriteLoadCommands(changefunc)
try:
f = open(dll.filename, 'rb+')
for header in dll.headers:
f.seek(0)
dll.write(f)
f.seek(0, 2)
f.flush()
f.close()
except Exception:
pass
return
def rewriteFramework(framework, frameworkMap):
basename = os.path.splitext(os.path.basename(framework))[0]
dyld = os.path.abspath(os.path.join(framework, basename))
macho = MachO(dyld)
def changefunc(key):
if key == dyld:
return dyld
dirname, filename = os.path.split(key)
return frameworkMap.get(filename)
macho.rewriteLoadCommands(changefunc)
macho.write(open(dyld, "rb+"))
def rewriteFramework(framework, frameworkMap):
basename = os.path.splitext(os.path.basename(framework))[0]
dyld = os.path.abspath(os.path.join(framework, basename))
macho = MachO(dyld)
def changefunc(key):
if key == dyld:
return dyld
dirname, filename = os.path.split(key)
return frameworkMap.get(filename)
macho.rewriteLoadCommands(changefunc)
macho.write(open(dyld, "rb+"))
def modify_object_macholib(cur_path, old_dir, new_dir):
"""
Modify MachO binary path_name by replacing old_dir with new_dir
or the relative path to spack install root.
The old install dir in LC_ID_DYLIB is replaced with the new install dir
using py-macholib
The old install dir in LC_LOAD_DYLIB is replaced with the new install dir
using py-macholib
The old install dir in LC_RPATH is replaced with the new install dir using
using py-macholib
"""
if cur_path.endswith('.o'):
return
try:
from macholib.MachO import MachO
except ImportError as e:
raise MissingMacholibException(e)
def match_func(cpath):
rpath = cpath.replace(old_dir, new_dir)
return rpath
dll = MachO(cur_path)
dll.rewriteLoadCommands(match_func)
try:
f = open(dll.filename, 'rb+')
for header in dll.headers:
f.seek(0)
dll.write(f)
f.seek(0, 2)
f.flush()
f.close()
except Exception:
pass
return
def mac_set_relative_dylib_deps(libname, distname):
"""
On Mac OS X set relative paths to dynamic library dependencies
of `libname`.
Relative paths allow to avoid using environment variable DYLD_LIBRARY_PATH.
There are known some issues with DYLD_LIBRARY_PATH. Relative paths is
more flexible mechanism.
Current location of dependend libraries is derived from the location
of the library path (paths start with '@loader_path').
'distname' path of the library relative to dist directory of frozen
executable. We need this to determine the level of directory
level for @loader_path of binaries not found in dist directory.
E.g. qt4 plugins are not in the same directory as Qt*.dylib
files. Without using '@loader_path/../..' for qt plugins
Mac OS X would not be able to resolve shared library
dependencies and qt plugins will not be loaded.
"""
from macholib import util
from macholib.MachO import MachO
# Ignore bootloader otherwise PyInstaller fails with exception like
# 'ValueError: total_size > low_offset (288 > 0)'
if os.path.basename(libname) in _BOOTLOADER_FNAMES:
return
# Determine how many directories up is the directory with shared
# dynamic libraries. '../'
# E.g. ./qt4_plugins/images/ -> ./../../
parent_dir = ''
# Check if distname is not only base filename.
if os.path.dirname(distname):
parent_level = len(os.path.dirname(distname).split(os.sep))
parent_dir = parent_level * (os.pardir + os.sep)
def match_func(pth):
"""
For system libraries is still used absolute path. It is unchanged.
"""
# Leave system dynamic libraries unchanged
if util.in_system_path(pth):
return None
# The older python.org builds that use system Tcl/Tk framework
# have their _tkinter.cpython-*-darwin.so library linked against
# /Library/Frameworks/Tcl.framework/Versions/8.5/Tcl and
# /Library/Frameworks/Tk.framework/Versions/8.5/Tk, although the
# actual frameworks are located in /System/Library/Frameworks.
# Therefore, they slip through the above in_system_path() check,
# and we need to exempt them manually.
_exemptions = [
'/Library/Frameworks/Tcl.framework/',
'/Library/Frameworks/Tk.framework/'
]
if any([x in pth for x in _exemptions]):
return None
# Use relative path to dependent dynamic libraries based on the
# location of the executable.
return os.path.join('@loader_path', parent_dir, os.path.basename(pth))
# Rewrite mach headers with @loader_path.
dll = MachO(libname)
dll.rewriteLoadCommands(match_func)
# Write changes into file.
# Write code is based on macholib example.
try:
with open(dll.filename, 'rb+') as f:
for header in dll.headers:
f.seek(0)
dll.write(f)
f.seek(0, 2)
f.flush()
except Exception:
pass
def mac_set_relative_dylib_deps(libname, distname):
"""
On Mac OS X set relative paths to dynamic library dependencies
of `libname`.
Relative paths allow to avoid using environment variable DYLD_LIBRARY_PATH.
There are known some issues with DYLD_LIBRARY_PATH. Relative paths is
more flexible mechanism.
Current location of dependend libraries is derived from the location
of the library path (paths start with '@loader_path').
'distname' path of the library relative to dist directory of frozen
executable. We need this to determine the level of directory
level for @loader_path of binaries not found in dist directory.
E.g. qt4 plugins are not in the same directory as Qt*.dylib
files. Without using '@loader_path/../..' for qt plugins
Mac OS X would not be able to resolve shared library
dependencies and qt plugins will not be loaded.
"""
from macholib import util
from macholib.MachO import MachO
# Ignore bootloader otherwise PyInstaller fails with exception like
# 'ValueError: total_size > low_offset (288 > 0)'
if os.path.basename(libname) in _BOOTLOADER_FNAMES:
return
# Determine how many directories up is the directory with shared
# dynamic libraries. '../'
# E.g. ./qt4_plugins/images/ -> ./../../
parent_dir = ''
# Check if distname is not only base filename.
if os.path.dirname(distname):
parent_level = len(os.path.dirname(distname).split(os.sep))
parent_dir = parent_level * (os.pardir + os.sep)
def match_func(pth):
"""
For system libraries is still used absolute path. It is unchanged.
"""
# Match non system dynamic libraries.
if not util.in_system_path(pth):
# Use relative path to dependend dynamic libraries bases on
# location of the executable.
return os.path.join('@loader_path', parent_dir,
os.path.basename(pth))
# Rewrite mach headers with @loader_path.
dll = MachO(libname)
dll.rewriteLoadCommands(match_func)
# Write changes into file.
# Write code is based on macholib example.
try:
with open(dll.filename, 'rb+') as f:
for header in dll.headers:
f.seek(0)
dll.write(f)
f.seek(0, 2)
f.flush()
except Exception:
pass
