[reportlab-users] Symbol not found in flat namespace when running on macOS 12.0.1

[Robin Becker]

Hi Markus,

I don't have a proper mac and have been building out these darwin dylibs using a github action. I suspect you are right 
and that this is a version compatibility issue. However, I have no real idea, what version of OS/xcode is the issue here.

I looked at the 3.9 log here and at least for some architectures the tests seem to have run without this error see eg


https://github.com/MrBitBucket/reportlab-ci/runs/3923521082?check_suite_focus=true

however I think we are running system pythons and I see the following


CIBW_TEST_SKIP: "*-manylinux_{aarch64,ppc64le,s390x} *-macosx_arm64 *-macosx_universal2:arm64"

So perhaps the arm64 build has this problem. I believe I added the test skips because of problems with the imaging 
library, but it could also be a problem with the freetype lib. However, looking at the build logs I see this

########## SUMMARY INFO #########
       ##### setup-python-3.9.7-macosx-11.0-arm64: ================================================
       ##### setup-python-3.9.7-macosx-11.0-arm64: Attempting build of _rl_accel
       ##### setup-python-3.9.7-macosx-11.0-arm64: extensions from 'src/rl_addons/rl_accel'
       ##### setup-python-3.9.7-macosx-11.0-arm64: ================================================
       ##### setup-python-3.9.7-macosx-11.0-arm64: ===================================================
       ##### setup-python-3.9.7-macosx-11.0-arm64: Attempting build of _renderPM
       ##### setup-python-3.9.7-macosx-11.0-arm64: extensions from 'src/rl_addons/renderPM'
       ##### setup-python-3.9.7-macosx-11.0-arm64: ===================================================
       ##### setup-python-3.9.7-macosx-11.0-arm64: will use package libart 2.3.21
       ##### setup-python-3.9.7-macosx-11.0-arm64: # installing with freetype version 21
       ##### setup-python-3.9.7-macosx-11.0-arm64: ################################################
       ##### setup-python-3.9.7-macosx-11.0-arm64: Downloading standard T1 font curves
       ##### setup-python-3.9.7-macosx-11.0-arm64: Finished download of standard T1 font curves
       ##### setup-python-3.9.7-macosx-11.0-arm64: Finished creation of _glyphlist.py

so at least for that build it claims to have built with freetype version 21 and the compile command was

>  gcc -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -g -arch arm64 -DRENDERPM_FT -DLIBART_COMPILATION -DLIBART_VERSION=2.3.21 -Isrc/rl_addons/renderPM -Isrc/rl_addons/renderPM/libart_lgpl -Isrc/rl_addons/renderPM/gt1 -I/usr/local/include/freetype2 -I/Library/Frameworks/Python.framework/Versions/3.9/include/python3.9 -c src/rl_addons/renderPM/_renderPM.c -o build/temp.macosx-11.0-arm64-3.9/src/rl_addons/renderPM/_renderPM.o

the load command contains this

> -L/usr/local/lib -L/usr/lib -L/Library/Frameworks/Python.framework/Versions/3.9/lib -lfreetype -o build/lib.macosx-11.0-arm64-3.9/reportlab/graphics/_renderPM.cpython-39-darwin.so

so theoretically that dylib ought to contain the right stuff. However, it's for 11.0 not the 12.0 you have.

As you are using homebrew what happens when you just do brew reportlab or do they punt to downloading from pypi?

You can well blame us for lack of support, but I suspect this is just a problem with Apple constantly degrading old 
support to drag people into upgrading. I need to build a new version and will check if cibuildwheel now supports a more 
modern set of macosx builds.
--
Robin Becker

On 15/11/2021 13:12, Markus Gerards wrote:
> Hello everybody,
> 
> I have issues running my Django application that has reportlab as an indirect dependency from easy_thumbnails.
> The error is:
> 
> Invalid template library specified. ImportError raised when trying to load 'backend.templatetags.get_thumbnail': 
> dlopen(/Users/markusgerards/.pyenv/versions/myapp/lib/python3.9/site-packages/reportlab/graphics/_renderPM.cpython-39-darwin.so, 
> 0x0002): symbol not found in flat namespace '_FT_Done_Face'
> 
> My environment is:
> 
> macOS 12.0.1 with XCode 13.1 installed
> Python 3.9.7 within a virtual env (via Homebrew)
> Reportlab 3.6.2 (as a dependency from easy_thumbnails 2.8)
> Freetype 2.11.0 (via Homebrew)
> 
> I took a look into the problematic .so-file. Here is what otool says:
> 
> ```
> /Users/markusgerards/.pyenv/versions/myapp/lib/python3.9/site-packages/reportlab/graphics/_renderPM.cpython-39-darwin.so:
>      /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1292.60.1)
> ```
> 
> I suspect freetype should be listed there as a load command, am I right? Is it possible, that this fails due to some 
> stricter checks for symbols in recent XCode versions? When searching through the interwebs I stumbled upon this issue: 
> https://github.com/openzfsonosx/openzfs/pull/75
> 
> Could it be, that reportlab has the same problem?
> 
> As I am no lib-genius I suspect that this has to be fixed by reportlab, right?
> 
> Thanks!
> Markus
> 
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> 


-- 
Robin Becker