Nokogiri: Failure of building nokogiri is due to failure of building libxml2 2.9.4

Created on 24 Sep 2016 · 6Comments · Source: sparklemotion/nokogiri

Could you help me, please?

I found an issue when building libxml2 2.9.4 during installation of nokogiri. (gem install nokogiri)

The macro HAVE_LZMA_H is NOT set to 1, so that libxml2 cannot find LZMA_OK in lzma/base.h. In fact, it doesn't include this header files. Maybe something is wrong in extconf.rb. How can I fix it manually?

Thanks

ENV:
OS: macOS sierra + Homebrew
Dependency Libs: xz (lzma.h included) had been installed
Ruby: 2.3.1 (with rbenv 1.0.0)

Source

yangzhichina

Most helpful comment

Try xcode-select --install and then retry the gem install nokogiri command.

scharfie on 27 Sep 2016

👍10 👎1

All 6 comments

For now I installed nokogiri with homebrew libxml2.

PKG_CONFIG_PATH="$(brew --prefix)/opt/libxml2/lib/pkgconfig" \
LDFLAGS="-L$(brew --prefix)/opt/libxml2/lib" \
CPPFLAGS="-I(brew --prefix)/opt/libxml2/include" \
  gem install nokogiri -- --use-system-libraries

(all config are from brew info libxml2)

excerpt from the gem_make.out when just running gem install nokogiri

************************************************************************
Extracting libxml2-2.9.4.tar.gz into tmp/x86_64-apple-darwin16.0.0/ports/libxml2/2.9.4... OK
Running 'configure' for libxml2 2.9.4... OK
Running 'compile' for libxml2 2.9.4... ERROR, review '<homedir>/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.8/ext/nokogiri/tmp/x86_64-apple-darwin16.0.0/ports/libxml2/2.9.4/compile.log' to see what happened. Last lines are:
========================================================================
    unsigned short* in = (unsigned short*) inb;
                         ^~~~~~~~~~~~~~~~~~~~~
encoding.c:815:27: warning: cast from 'unsigned char *' to 'unsigned short *' increases required alignment from 1 to 2 [-Wcast-align]
    unsigned short* out = (unsigned short*) outb;
                          ^~~~~~~~~~~~~~~~~~~~~~
4 warnings generated.
  CC       error.lo
  CC       parserInternals.lo
  CC       parser.lo
  CC       tree.lo
  CC       hash.lo
  CC       list.lo
  CC       xmlIO.lo
xmlIO.c:1450:52: error: use of undeclared identifier 'LZMA_OK'
    ret =  (__libxml2_xzclose((xzFile) context) == LZMA_OK ) ? 0 : -1;
                                                   ^
1 error generated.
make[2]: *** [xmlIO.lo] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2

chulkilee on 27 Sep 2016

Try xcode-select --install and then retry the gem install nokogiri command.

scharfie on 27 Sep 2016

👍10 👎1

@scharfie that works! It's strange since I had no problem with building ruby or other gems with native extensions..

chulkilee on 27 Sep 2016

Thanks @scharfie, it works. I think it's because I was using the building tools within Xcode itself which could not find the path of XZ outside of Xcode sandbox, but the command tools of Xcode could find it.

yangzhichina on 27 Sep 2016

Thanks @scharfie, worked like a charm!