Hi, I am working on an application in python 3.7.6 using a library called
accessible_output2. I was able to successfully create a Windows executable
as a single file, however when I pulled out my mac and tried to build the
application, I got this "Unknown Mach-O header" error. I included the full
traceback and my .spec file below. The big issue is that accessible_output2
depends on a few DLLs to interface with Windows screen readers. Those DLLs
are not necessary on Mac, however even if I do not include the DLLs in the
binaries array in my spec file I am still getting this error that seems to
be attempting to load the DLLs when the executable is created, at least
based on the last line of the traceback.
Here is the traceback:
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.7/bin/pyinstaller",
line 8, in <module>
sys.exit(run())
File
"/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/PyInstaller/__main__.py",
line 114, in run
run_build(pyi_config, spec_file, **vars(args))
File
"/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/PyInstaller/__main__.py",
line 65, in run_build
PyInstaller.building.build_main.main(pyi_config, spec_file, **kwargs)
File
"/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/PyInstaller/building/build_main.py",
line 734, in main
build(specfile, kw.get('distpath'), kw.get('workpath'),
kw.get('clean_build'))
File
"/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/PyInstaller/building/build_main.py",
line 681, in build
exec(code, spec_namespace)
File "src/mtg.spec", line 25, in <module>
noarchive=False)
File
"/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/PyInstaller/building/build_main.py",
line 244, in __init__
self.__postinit__()
File
"/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/PyInstaller/building/datastruct.py",
line 160, in __postinit__
self.assemble()
File
"/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/PyInstaller/building/build_main.py",
line 470, in assemble
redirects=self.binding_redirects))
File
"/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/PyInstaller/depend/bindepend.py",
line 230, in Dependencies
for lib, npth in selectImports(pth, xtrapath):
File
"/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/PyInstaller/depend/bindepend.py",
line 501, in selectImports
dlls = getImports(pth)
File
"/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/PyInstaller/depend/bindepend.py",
line 742, in getImports
return _getImports_macholib(pth)
File
"/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/PyInstaller/depend/bindepend.py",
line 625, in _getImports_macholib
m = MachO(pth)
File
"/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/macholib/MachO.py",
line 118, in __init__
self.load(fp)
File
"/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/macholib/MachO.py",
line 133, in load
self.load_header(fh, 0, size)
File
"/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/macholib/MachO.py",
line 167, in load_header
raise ValueError("Unknown Mach-O header: 0x%08x in %r" % (header, fh))
ValueError: Unknown Mach-O header: 0x4d5a9000 in <_io.BufferedReader
name='/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/accessible_output2/lib/nvdaControllerClient64.dll'>
The last line mentioning accessible_output2/lib/nvdaControllerClient64.dll,
is one of the DLLs that accessible_output2 depends on. In my spec file you
can see that I constructed a binaries array to include the DLLs for
Windows, and an empty array is being passed for other platforms. I
originally did try passing the constructed binaries array on all platforms,
but I got the same error as above. I am only concerned with Windows and Mac.
Here is my spec file:
# -*- mode: python ; coding: utf-8 -*-
import os
import platform
block_cipher = None
binaries = []
if platform.system() == "Windows":
binaries = [(os.path.join('accessible_output2', 'lib',
'nvdaControllerClient32.dll'), '.'), (os.path.join('accessible_output2',
'lib', 'nvdaControllerClient64.dll'), '.'),
(os.path.join('accessible_output2', 'lib', 'dolapi.dll'),
'.'), (os.path.join('accessible_output2', 'lib', 'PCTKUSR.dll'), '.'),
(os.path.join('accessible_output2', 'lib', 'PCTKUSR64.dll'), '.'),
(os.path.join('accessible_output2', 'lib', 'SAAPI32.dll'),
'.')]
a = Analysis(['mtg.py'],
pathex=[SPECPATH],
binaries= binaries,
datas=[],
hiddenimports=[],
hookspath=[],
runtime_hooks=[],
excludes=[],
win_no_prefer_redirects=False,
win_private_assemblies=False,
cipher=block_cipher,
noarchive=False)
pyz = PYZ(a.pure, a.zipped_data,
cipher=block_cipher)
exe = EXE(pyz,
a.scripts,
a.binaries,
a.zipfiles,
a.datas,
[],
name='mtg',
debug=False,
bootloader_ignore_signals=False,
strip=False,
upx=True,
upx_exclude=[],
runtime_tmpdir=None,
console=False )
my command to run is:
pyinstaller mtg.spec
I have search everywhere for an answer for this problem, but have not found
much. It looks like a ticket was opened for a similar issue, but there is
no answer that helped me.
https://github.com/NordicSemiconductor/pc-nrfutil/issues/183
There was also this thread that mentioned this issue, but also no answer
that helps me:
http://pyinstaller.47505.x6.nabble.com/ValueError-Unknown-Mach-O-header-td2238.html
This is all that I could find on this problem, does anyone have any ideas
how to deal with this issue?
Let me know if I need to include any more information.
Thanks,
Timothy Breitenfeldt
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