Issue building lxml for Kivy-ios

[mawaki]

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I am having issues building lxml using Kivy-ios or buildozer.

I get the same error either when I try with kivy-ios only or buildozer.

    running build_ext
    building 'lxml.etree' extension
    creating build/temp.macosx-11.5-x86_64-3.9
    creating build/temp.macosx-11.5-x86_64-3.9/src
    creating build/temp.macosx-11.5-x86_64-3.9/src/lxml
    /usr/bin/false -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include -DCYTHON_CLINE_IN_TRACEBACK=0 -Isrc -Isrc/lxml/includes -I/Volumes/Passport_mac/mac/Dev/Mawou_buildozer/.buildozer/venv/include -I/Users/mawakibidjada/.pyenv/versions/3.9.2/include/python3.9 -c src/lxml/etree.c -o build/temp.macosx-11.5-x86_64-3.9/src/lxml/etree.o -w -flat_namespace
    Compile failed: command '/usr/bin/false' failed with exit code 1
    creating tmp
    cc -I/usr/include/libxml2 -c /tmp/xmlXPathInitkpqxhlhb.c -o tmp/xmlXPathInitkpqxhlhb.o
    cc tmp/xmlXPathInitkpqxhlhb.o -lxml2 -o a.out
    error: command '/usr/bin/false' failed with exit code 1
    ----------------------------------------
ERROR: Command errored out with exit status 1: /Volumes/Passport_mac/mac/Dev/Mawou_buildozer/.buildozer/venv/bin/python3 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/tmp/pip-install-plsllze8/lxml/setup.py'"'"'; __file__='"'"'/private/tmp/pip-install-plsllze8/lxml/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /private/tmp/pip-record-efi3mmzj/install-record.txt --single-version-externally-managed --home /private/tmp/pip-target-fkpd45qq --compile --install-headers include/site/python3.9/lxml Check the logs for full command output.
WARNING: You are using pip version 20.2.3; however, version 21.2.4 is available.
You should consider upgrading via the '/Volumes/Passport_mac/mac/Dev/Mawou_buildozer/.buildozer/venv/bin/python3 -m pip install --upgrade pip' command.
# Command failed: pip install --target=/Volumes/Passport_mac/mac/Dev/Mawou_buildozer/.buildozer/applibs yagmail
# ENVIRONMENT:
#     VIRTUAL_ENV = '/Volumes/Passport_mac/mac/Dev/Mawou_buildozer/.buildozer/venv'
#     PATH = '/Volumes/Passport_mac/mac/Dev/Mawou_buildozer/.buildozer/venv/bin:/Volumes/Passport_mac/mac/Dev/Mawou_buildozer/venv/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/Apple/usr/bin'
#     CC = '/usr/bin/false'
#     CXX = '/usr/bin/false'
# 
# Buildozer failed to execute the last command
# The error might be hidden in the log above this error
# Please read the full log, and search for it before
# raising an issue with buildozer itself.
# In case of a bug report, please add a full log with log_level = 2

YOUR HELP IS APPRECIATED. @AndreMiras :)

[misl6]

lxml is Pythonic binding for libxml2 - libxslt c libraries and needs a recipe on kivy-ios, so cannot be installed via pip.

The recipe was previously available but has never been migrated to the new toolchain (See https://github.com/kivy/kivy-ios/blob/8a2f5a621b6bbc48132b9fa48d85093db5ee786c/tools/build-lxml.sh)

[mawaki]

Thanks @misl6!

I will try it and follow up.

[mawaki]

@misl6 the recipe you referenced is a .sh file while python recipes are python files. How can I make it work? Thanks!

[misl6]

In past (that referenced file is quite old), "recipes" were bash scripts. That file that I referenced could help you find out which hacks are needed in the recipe to get it to work, but, of course, you should do a complete re-work of it.

[mawaki]

Ok, thanks. I will work on it, but I will leave this issue open in case someone has the recipe. Thanks @misl6

[sharpordie]

Is it working with lxml alternatives like pugixml? https://pypi.org/project/pugixml/