Nokogiri: Unknown warning option '-Werror=unused-command-line-argument-hard-error-in-future'

Created on 7 Mar 2015 · 9Comments · Source: sparklemotion/nokogiri

According to gem_make.out, a check is made if the C compiler accepts unused-command-line-argument-hard-error-in-future. The response is "no", but, according to mkmf.log, the option is passed along anyway.

My environment

OS X Yosemite 10.10.2
Ruby 2.2.1p85 (2015-02-26 revision 49769) [x86_64-darwin14]
Clang 6.0

gem_make.out

...
checking if the C compiler accepts ... yes
checking if the C compiler accepts -Wno-error=unused-command-line-argument-hard-error-in-future... no
Building nokogiri using packaged libraries.
*** extconf.rb failed ***

mkmf.log

...
"clang -I/usr/local/include/ruby-2.2.0/x86_64-darwin14 -I/usr/local/include/ruby-2.2.0/ruby/backward -I/usr/local/include/ruby-2.2.0 -I. -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT    -O3 -fno-fast-math -ggdb3 -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wunused-variable -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wshorten-64-to-32 -Wimplicit-function-declaration -Wdivision-by-zero -Wdeprecated-declarations -Wextra-tokens  -pipe  -Wno-error=unused-command-line-argument-hard-error-in-future   -Werror -c conftest.c"
error: unknown warning option '-Werror=unused-command-line-argument-hard-error-in-future'; did you mean '-Werror=unused-command-line-argument'? [-Werror,-Wunknown-warning-option]
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: int main() {return 0;}
/* end */

Source

jkereako

Most helpful comment

you can try this command "xcode-select --install" to install xcode tool and then "gem install nokogiri -v '1.6.6.2' "

baorsmile on 6 Sep 2016

👍4

All 9 comments

Hi @jkereako,

Thanks for asking this question. It's not clear what's going on here, but I suspect you're looking at the mkmf.log file from the check you're referencing.

Is Nokogiri not installing? If so, can you provide more information -- your entire mkmf.log as well as the entire installation output?

flavorjones on 30 Sep 2015

For the past eight years, Apple has been phasing out GCC in favor of Clang in its Xcode developer tools. A year or two ago (in Xcode 5.1?), Clang started throwing an error when handed unknown command-line arguments (read: GCC-specific arguments). #1101 appears to be where Nokogiri became aware of this fact, with the commonly accepted workaround—downgrading the error to a warning—implemented in https://github.com/sparklemotion/nokogiri/commit/d9b63d2bf5f6094ec7b49748c170d0704c646a34. As promised over on #1101, "this will be a hard error (cannot be downgraded to a warning) in the future." The future is now! :rocket: :sparkles: It appears that with the latest version(s) of Xcode, the process of phasing out GCC is now complete, ~~the downgrade workaround is no longer effective, and that's why @jkereako and I are seeing the error we're seeing~~ [see below].

$ sw_vers 
ProductName:    Mac OS X
ProductVersion: 10.10.5
BuildVersion:   14F27
$ clang --version
Apple LLVM version 7.0.0 (clang-700.0.72)
Target: x86_64-apple-darwin14.5.0
Thread model: posix
$ ruby --version
ruby 2.1.4p265 (2014-10-27 revision 48166) [x86_64-darwin14.0]
$
$
$
$ gem install nokogiri
Building native extensions.  This could take a while...
ERROR:  Error installing nokogiri:
    ERROR: Failed to build gem native extension.

    /opt/rubies/ruby-2.1.4/bin/ruby -r ./siteconf20151026-32154-xjpjge.rb extconf.rb
checking if the C compiler accepts -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/sasl... yes
checking if the C compiler accepts -Wno-error=unused-command-line-argument-hard-error-in-future... no
Building nokogiri using packaged libraries.
*** 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=/opt/rubies/ruby-2.1.4/bin/ruby
    --help
    --clean
    --use-system-libraries
/opt/rubies/ruby-2.1.4/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:54:in `require': cannot load such file -- mini_portile (LoadError)
    from /opt/rubies/ruby-2.1.4/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from extconf.rb:395:in `<main>'

extconf failed, exit code 1

Gem files will remain installed in /Users/whit537/.gem/ruby/2.1.4/gems/nokogiri-1.6.6.2 for inspection.
Results logged to /Users/whit537/.gem/ruby/2.1.4/extensions/x86_64-darwin-14/2.1.0-static/nokogiri-1.6.6.2/gem_make.out
$
$
$
$ cat /Users/whit537/.gem/ruby/2.1.4/extensions/x86_64-darwin-14/2.1.0-static/nokogiri-1.6.6.2/mkmf.log 
"clang -o conftest -I/opt/rubies/ruby-2.1.4/include/ruby-2.1.0/x86_64-darwin14.0 -I/opt/rubies/ruby-2.1.4/include/ruby-2.1.0/ruby/backward -I/opt/rubies/ruby-2.1.4/include/ruby-2.1.0 -I. -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/sasl -pipe -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/sasl conftest.c  -L. -L/opt/rubies/ruby-2.1.4/lib -L. -L/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/lib -fstack-protector -L/usr/local/lib     -lruby-static -framework CoreFoundation  -lpthread -ldl -lobjc  "
ld: warning: directory not found for option '-L/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/lib'
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: int main(int argc, char **argv)
4: {
5:   return 0;
6: }
/* end */

"clang -I/opt/rubies/ruby-2.1.4/include/ruby-2.1.0/x86_64-darwin14.0 -I/opt/rubies/ruby-2.1.4/include/ruby-2.1.0/ruby/backward -I/opt/rubies/ruby-2.1.4/include/ruby-2.1.0 -I. -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/sasl -pipe -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/sasl   -Werror -c conftest.c"
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: int main() {return 0;}
/* end */

"clang -I/opt/rubies/ruby-2.1.4/include/ruby-2.1.0/x86_64-darwin14.0 -I/opt/rubies/ruby-2.1.4/include/ruby-2.1.0/ruby/backward -I/opt/rubies/ruby-2.1.4/include/ruby-2.1.0 -I. -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/sasl -pipe -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/sasl -Wno-error=unused-command-line-argument-hard-error-in-future   -Werror -c conftest.c"
error: unknown warning option '-Werror=unused-command-line-argument-hard-error-in-future'; did you mean '-Werror=unused-command-line-argument'? [-Werror,-Wunknown-warning-option]
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: int main() {return 0;}
/* end */