Can't compile - missing libxml/tree.h

[rpwatkins]

I have libxml2 installed and the install script is finding it prior to calling gcc, but when the gcc call is made, gcc cannot find the libxml/tree.h file.

[jirutka]

Have you also installed libxml2 headers, usually provided by package like libxml2-dev or libxml2-devel?

[abelsromero]

I know it's an old post, I am just adding more info in case it helps someone else.

I have the same issue with MSYS2.
I have the lib and .h

But the build fails, and looking into the build console, it seems it check the previous path:

[mast3rz3ro]

@abelsromero I come across your comment because your were used MSYS2
For anybody who run into same error, please refer to here:
moovweb/gokogiri#14 (comment)