An error occurred while installing nokogiri (1.10.3)

[neilbalch]

I've been trying to install the jemoji plugin for my GitHub Pages site, but to no avail. Please let me know if more information is required. I'm not sure what is needed.

Output of gem install jemoji:

... skipped for brevity...
An error occurred while installing nokogiri (1.10.3), and Bundler cannot continue.
Make sure that `gem install nokogiri -v '1.10.3' --source 'https://rubygems.org/'` succeeds before bundling.

In Gemfile:
  jemoji was resolved to 0.11.1, which depends on
    html-pipeline was resolved to 2.11.1, which depends on
      nokogiri

bundler --version: Bundler version 2.0.1 ruby --version: ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-linux-gnu]

[DirtyF]

gem install jemoji
Fetching jemoji-0.11.1.gem
Successfully installed jemoji-0.11.1
1 gem installed

[neilbalch]

Full error, in case that's useful, @DirtyF

neil@Neil-Laptop:~$ sudo gem install jemoji
[sudo] password for neil:
Building native extensions. This could take a while...
ERROR:  Error installing jemoji:
        ERROR: Failed to build gem native extension.

    current directory: /var/lib/gems/2.5.0/gems/nokogiri-1.10.3/ext/nokogiri
/usr/bin/ruby2.5 -r ./siteconf20190808-9217-rg4gky.rb extconf.rb
checking if the C compiler accepts ... yes
Building nokogiri using packaged libraries.
Using mini_portile version 2.4.0
checking for gzdopen() in -lz... no
zlib is missing; necessary for building libxml2
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers.  Check the mkmf.log file for more details.  You may
need configuration options.

Provided configuration options:
        --with-opt-dir
        --without-opt-dir
        --with-opt-include
        --without-opt-include=${opt-dir}/include
        --with-opt-lib
        --without-opt-lib=${opt-dir}/lib
        --with-make-prog
        --without-make-prog
        --srcdir=.
        --curdir
        --ruby=/usr/bin/$(RUBY_BASE_NAME)2.5
        --help
        --clean
        --use-system-libraries
        --enable-static
        --disable-static
        --with-zlib-dir
        --without-zlib-dir
        --with-zlib-include
        --without-zlib-include=${zlib-dir}/include
        --with-zlib-lib
        --without-zlib-lib=${zlib-dir}/lib
        --enable-cross-build
        --disable-cross-build

To see why this extension failed to compile, please check the mkmf.log which can be found here:

  /var/lib/gems/2.5.0/extensions/x86_64-linux/2.5.0/nokogiri-1.10.3/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /var/lib/gems/2.5.0/gems/nokogiri-1.10.3 for inspection.
Results logged to /var/lib/gems/2.5.0/extensions/x86_64-linux/2.5.0/nokogiri-1.10.3/gem_make.out
neil@Neil-Laptop:~$

[neilbalch]

/var/lib/gems/2.5.0/extensions/x86_64-linux/2.5.0/nokogiri-1.10.3/mkmf.log

"gcc -o conftest -I/usr/include/x86_64-linux-gnu/ruby-2.5.0 -I/usr/include/ruby-2.5.0/ruby/backward -I/usr/include/ruby-2.5.0 -I. -Wdate-time -D_FORTIFY_SOURCE=2   -g -O2 -fdebug-prefix-map=/build/ruby2.5-Cn_Oyg/ruby2.5-2.5.1=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC  conftest.c  -L. -L/usr/lib/x86_64-linux-gnu -L. -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now -fstack-protector -rdynamic -Wl,-export-dynamic     -lruby-2.5  -lpthread -lgmp -ldl -lcrypt -lm   -lc "
checked program was:
/* begin */
1: #include "ruby.h"
2:
3: int main(int argc, char **argv)
4: {
5:   return 0;
6: }
/* end */

"gcc -I/usr/include/x86_64-linux-gnu/ruby-2.5.0 -I/usr/include/ruby-2.5.0/ruby/backward -I/usr/include/ruby-2.5.0 -I. -Wdate-time -D_FORTIFY_SOURCE=2   -g -O2 -fdebug-prefix-map=/build/ruby2.5-Cn_Oyg/ruby2.5-2.5.1=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC    -Werror -c conftest.c"
checked program was:
/* begin */
1: #include "ruby.h"
2:
3: int main() {return 0;}
/* end */

have_library: checking for gzdopen() in -lz... -------------------- no

"gcc -o conftest -I/usr/include/x86_64-linux-gnu/ruby-2.5.0 -I/usr/include/ruby-2.5.0/ruby/backward -I/usr/include/ruby-2.5.0 -I. -Wdate-time -D_FORTIFY_SOURCE=2   -g -O2 -fdebug-prefix-map=/build/ruby2.5-Cn_Oyg/ruby2.5-2.5.1=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC  -g -DXP_UNIX -Wall -Wcast-qual -Wwrite-strings -Wmissing-noreturn -Winline conftest.c  -L. -L/usr/lib/x86_64-linux-gnu -L. -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now -fstack-protector -rdynamic -Wl,-export-dynamic     -lruby-2.5 -lz  -lpthread -lgmp -ldl -lcrypt -lm   -lc "
conftest.c:3:10: fatal error: zlib.h: No such file or directory
 #include <zlib.h>
          ^~~~~~~~
compilation terminated.
checked program was:
/* begin */
 1: #include "ruby.h"
 2:
 3: #include <zlib.h>
 4:
 5: /*top*/
 6: extern int t(void);
 7: int main(int argc, char **argv)
 8: {
 9:   if (argc > 1000000) {
10:     printf("%p", &t);
11:   }
12:
13:   return 0;
14: }
15: int t(void) { void ((*volatile p)()); p = (void ((*)()))gzdopen; return !p; }
/* end */

"gcc -o conftest -I/usr/include/x86_64-linux-gnu/ruby-2.5.0 -I/usr/include/ruby-2.5.0/ruby/backward -I/usr/include/ruby-2.5.0 -I. -Wdate-time -D_FORTIFY_SOURCE=2   -g -O2 -fdebug-prefix-map=/build/ruby2.5-Cn_Oyg/ruby2.5-2.5.1=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC  -g -DXP_UNIX -Wall -Wcast-qual -Wwrite-strings -Wmissing-noreturn -Winline conftest.c  -L. -L/usr/lib/x86_64-linux-gnu -L. -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now -fstack-protector -rdynamic -Wl,-export-dynamic     -lruby-2.5 -lz  -lpthread -lgmp -ldl -lcrypt -lm   -lc "
conftest.c:3:10: fatal error: zlib.h: No such file or directory
 #include <zlib.h>
          ^~~~~~~~
compilation terminated.
checked program was:
/* begin */
 1: #include "ruby.h"
 2:
 3: #include <zlib.h>
 4:
 5: /*top*/
 6: extern int t(void);
 7: int main(int argc, char **argv)
 8: {
 9:   if (argc > 1000000) {
10:     printf("%p", &t);
11:   }
12:
13:   return 0;
14: }
15: extern void gzdopen();
16: int t(void) { gzdopen(); return 0; }
/* end */

--------------------

I have no idea how to get the zlib.h that it is complaining about. Little help?

[DirtyF]

https://stackoverflow.com/questions/6277456/nokogiri-installation-fails-libxml2-is-missing

[neilbalch]

@DirtyF Thank you for the resource, that fixes it for me. I'm still not sure, however, how I was supposed to find that on my own.