# Missing header stdio.h? (when updating hpricot gem) **URL:** \ **Category:** Ruby\ **Created:** [August 29, 2008, 2:53am UTC](https://www.ruby-forum.com/t/missing-header-stdio-h-when-updating-hpricot-gem/147172 "2008-08-29T02:53:09Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![carluva](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/76d3ee/32.png) [@carluva](https://www.ruby-forum.com/u/carluva)\ **Post date:** [August 29, 2008, 2:53am UTC](https://www.ruby-forum.com/t/missing-header-stdio-h-when-updating-hpricot-gem/147172/1 "2008-08-29T02:53:09Z")
I just ran ‘gem update’ this evening, and during the update for hpricot, I got a rather surprising error. Here’s the complete output from gem: * * * Updating installed gems Updating hpricot Building native extensions. This could take a while… ERROR: While executing gem … (Gem::Installer::ExtensionBuildError) ERROR: Failed to build gem native extension. d:/ruby/bin/ruby.exe extconf.rb update hpricot checking for stdio.h… no \*\*\* 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 –srcdir=. –curdir –ruby=d:/ruby/bin/ruby ## Gem files will remain installed in d:/ruby/lib/ruby/gems/1.8/gems/hpricot-0.6.161 for inspection. Results logged to d:/ruby/lib/ruby/gems/1.8/gems/hpricot-0.6.161/ext/fast\_xs/gem\_make.out Neither mkmf.log nor gem\_make.out contains any additional helpful information. This only seems to happen with hpricot (I have manually updated other gems successfully). It sounds like there might be a lib missing from the distribution of hpricot. I don’t actually use that gem at present, so it’s not critical, but it piqued my interest, and it’s slightly annoying because gem aborts immediately instead of attempting to update the other gems. - Doug ---
**Author:** ![carluva](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/76d3ee/32.png) [@carluva](https://www.ruby-forum.com/u/carluva)\ **Post date:** [August 29, 2008, 8:33am UTC](https://www.ruby-forum.com/t/missing-header-stdio-h-when-updating-hpricot-gem/147172/2 "2008-08-29T08:33:07Z")
Doug G. wrote: > I just ran ‘gem update’ this evening, and during the update for hpricot, > I got a rather surprising error. Here’s the complete output from gem: > > * * * > > Updating installed gems > Updating hpricot > Building native extensions. This could take a while… > ERROR: While executing gem … (Gem::Installer::ExtensionBuildError) > ERROR: Failed to build gem native extension. It’s attempting to compile it. This error means either you don’t have a compiler or your compiler lives in a directory with spaces in it. I know that hpricot does compile if these two aren’t the case [i.e. mingw + devkit works fine]. You could also install an older version that has a precompiled binary. -=R ---
**Author:** ![carluva](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/76d3ee/32.png) [@carluva](https://www.ruby-forum.com/u/carluva)\ **Post date:** [August 29, 2008, 12:30pm UTC](https://www.ruby-forum.com/t/missing-header-stdio-h-when-updating-hpricot-gem/147172/3 "2008-08-29T12:30:55Z")
On 29 Aug 2008, at 01:48, Doug G. wrote: > I just ran ‘gem update’ this evening, and during the update for > hpricot, > I got a rather surprising error. Here’s the complete output from gem: Do you have a working C compiler installed? Sounds like you don’t Fred ---
**Author:** ![carluva](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/76d3ee/32.png) [@carluva](https://www.ruby-forum.com/u/carluva)\ **Post date:** [August 29, 2008, 2:43pm UTC](https://www.ruby-forum.com/t/missing-header-stdio-h-when-updating-hpricot-gem/147172/4 "2008-08-29T14:43:50Z")
Roger P. wrote: [snip] > It’s attempting to compile it. This error means either you don’t have a > compiler or your compiler lives in a directory with spaces in it. > [snip] Sounds likely. The same update worked fine on my work machine this morning. I’ll take a look when I get home this evening. I wasn’t expecting to need a C compiler to install a ruby gem. I’m pretty sure I have some version of gcc installed, but I’m not sure where it’s located or if I have an environment variable pointing to it. Thanks, Doug ---
**Author:** ![carluva](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/76d3ee/32.png) [@carluva](https://www.ruby-forum.com/u/carluva)\ **Post date:** [August 30, 2008, 12:20am UTC](https://www.ruby-forum.com/t/missing-header-stdio-h-when-updating-hpricot-gem/147172/5 "2008-08-30T00:20:25Z")
> expecting to need a C compiler to install a ruby gem. I’m pretty sure I > have some version of gcc installed, but I’m not sure where it’s located > or if I have an environment variable pointing to it. You’ll want to use the same compiler that you Ruby distro was compiled in–MSVC 6 or mingw. GL! -=R ---
**Author:** ![carluva](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/76d3ee/32.png) [@carluva](https://www.ruby-forum.com/u/carluva)\ **Post date:** [August 30, 2008, 9:48pm UTC](https://www.ruby-forum.com/t/missing-header-stdio-h-when-updating-hpricot-gem/147172/6 "2008-08-30T21:48:41Z")
Axel E. wrote: [snip] > See here: [Gem (update ?) problem - Ruby - Ruby-Forum](http://www.ruby-forum.com/topic/162379#new) (last post). > > Best regards, > > Axel Thanks very much! Doug ---
**Author:** ![carluva](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/76d3ee/32.png) [@carluva](https://www.ruby-forum.com/u/carluva)\ **Post date:** [August 30, 2008, 9:39pm UTC](https://www.ruby-forum.com/t/missing-header-stdio-h-when-updating-hpricot-gem/147172/7 "2008-08-30T21:39:38Z")
-------- Original-Nachricht -------- > Datum: Fri, 29 Aug 2008 09:48:22 +0900 > Von: Doug G. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) > An: removed\_email\_address@domain.invalid > Betreff: missing header stdio.h??? (when updating hpricot gem) > d:/ruby/bin/ruby.exe extconf.rb update hpricot > –without-opt-include=${opt-dir}/include > Results logged to > immediately instead of attempting to update the other gems. > > - Doug > – > Posted via [http://www.ruby-forum.com/](http://www.ruby-forum.com/). See here: [Gem (update ?) problem - Ruby - Ruby-Forum](http://www.ruby-forum.com/topic/162379#new) (last post). Best regards, Axel