Homebrew install libxml2 with python modules

问题

Good morning,

I'm trying to install libxml2 with python modules. I have tried the following:

brew install --with-python libxml2                                                                  
==> Downloading ftp://xmlsoft.org/libxml2/libxml2-2.8.0.tar.gz
Already downloaded: /Users/brandon/Library/Caches/Homebrew/libxml2-2.8.0.tar.gz
==> ./configure --prefix=/usr/local/Cellar/libxml2/2.8.0 --without-python

As you can see... even with the --with-python flag, it is still configuring the source without python!

At the end of the install, homebrew says:

Generally there are no consequences of this for you.
If you build your own software and it requires this formula, you'll need
to add its lib & include paths to your build variables:

    LDFLAGS  -L/usr/local/Cellar/libxml2/2.8.0/lib
    CPPFLAGS -I/usr/local/Cellar/libxml2/2.8.0/include

When I try to install the gnome-doc-utils package:

Gnome-doc-utils requires libxml2 to be compiled
with the python modules enabled, to do so:
  $ brew install libxml2 --with-python

So obviously I tried again...

╰─ brew install libxml2 --with-python
Error: libxml2-2.8.0 already installed

I'm still new to this... so any help would be greatly appreciated.

回答1:

First, you cannot install libxml2 because you already successfully installed it, so you will first need to uninstall it.

brew uninstall libxml2

Next you will need to edit the brew formula - which is simple enough to do --

type brew edit libxml2 and change the line

system "./configure", "--prefix=#{prefix}", "--without-python"

to this:

system "./configure", "--prefix=#{prefix}", "--with-python"

This does not fix the problem with the brew formula, but it does force the flag "--with-python", so the next time you type brew install libxml2 it will install the python libraries.

If you need to reset the formula (undo your changes), simply type brew update

回答2:

This worked for me. First unlink/uninstall if done previously:

brew unlink libxml2
brew unlink libxslt
brew uninstall libxml2
brew uninstall libxslt

Then

brew install --framework python
brew install --with-python libxml2
brew install --with-python libxslt
brew link libxml2 --force
brew link libxslt --force

Voila!