0

I'm trying to install lxml with pip. I received this initial error when running my script:

bs4.FeatureNotFound: Couldn't find a tree builder with the features you requested: xml. Do you need to install a parser library?

A quick search of the above error (such as here) revealed I need to install lxml.

While trying to install lxml I receive the following error:

clang: error: unknown argument: '-mno-fused-madd' error: command 'cc' failed with exit status 1

Any idea what is going on?

Improve this question

1 Answer 1

Reset to default
1

According to Xcode 5 Release Notes:

The Apple LLVM compiler in Xcode 5.1 treats unrecognized command-line options as errors. This issue has been seen when building both Python native extensions and Ruby Gems, where some invalid compiler options are currently specified.

...

To workaround this issue, set the ARCHFLAGS environment variable to downgrade the error to a warning. For example, you can install a Python native extension with:

$ ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future \ easy_install ExtensionName

Set following environment variable before installing lxml:

export ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future
Improve this answer
Sign up to request clarification or add additional context in comments.

Comments

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.