Unable to install rugged under Windows 7

[mliebelt]

I have tried the last few hours to install rugged under windows 7 but failed. Here is the setup:

• ruby.exe is in the path

• DevKit is installed and found

• When I run gem install rugged it fails with the following output:

  C:\apps\ruby\libgit2\build>gem install rugged
  Temporarily enhancing PATH to include DevKit...
  Building native extensions.  This could take a while...
  ERROR:  Error installing rugged:
      ERROR: Failed to build gem native extension.
  ...
  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.
  

In the mentioned mkmf.log, I find the following lines at the end:

"make -f Makefile.embed"
cc -g -I. -Isrc -Iinclude -Ideps/http-parser -Ideps/zlib -DNO_VIZ -DSTDC -DNO_GZIP -D_FILE_OFFSET_BITS=64 -Wall -                Wextra -fPIC -O2   -c -o src/blob.o src/blob.c
make: cc: Command not found
make: *** [src/blob.o] Error 127

What Do I have to do / to install to fix that error for me?

[vmg]

/cc @brianmario

I'm not sure about how to fix this. The Makefile.embed that we use to build libgit2 is designed for POSIX systems -- it won't work at all under Windows, even if the DevKit is installed.

Is there anyway we can ship Rugged gems with a pre-build libgit2 dll under Windows? How does that even work?

[brianmario]

We could give cross-compiling a try - I do that for mysql2 and yajl-ruby. Although I don't ship mysql2 with the libmysql.dll itself, we could probably build and ship libgit2.dll pretty easily (assuming it builds under the compilers I use http://crossgcc.rts-software.org/doku.php)

On Sunday, March 4, 2012 at 6:54 AM, Vicent Martí wrote:

/cc @brianmario

I'm not sure about how to fix this. The Makefile.embed that we use to build libgit2 is designed for POSIX systems -- it won't work at all under Windows, even if the DevKit is installed.

Is there anyway we can ship Rugged gems with a pre-build libgit2 dll under Windows? How does that even work?

---

Reply to this email directly or view it on GitHub:
#43 (comment)

[emassip]

Would be so great!

[stereobooster]

If I build libgit2 dll on my windows machine using this instruction. What to do next?

[bmatzelle]

Is there any resolution to this issue? It is possible to create native builds on Windows with DevKit. The RDiscount project has figured out how to make it work for both Windows and Linux/UNIX. The build can be executed with a single command with DevKit (I've tested it):

gem install rdiscount --platform=ruby

Could a rugged developer please look at the RDiscount Rakefile and extconf.rb files to see if this cross-platform support can be added to rugged's build files? I volunteer to help with testing the builds on Windows.

BTW, I've already compiled libgit2 on Windows so I should have all the necessary files.

[bmatzelle]

Can anyone offer any insight into this issue? I'd be happy to help get the Windows build working but I'll need some direction.

[scottjg]

The Makefile.embed that we use to build libgit2 is designed for POSIX systems -- it won't work at all under Windows, even if the DevKit is installed.

I think you mean, it won't work under windows... YET. 👊

[vmg]

You could certainly write a Makefile.embed.w32, but the original one simply won't work.

[scottjg]

since the commonly-used windows ruby devkit ships with mingw32, using one embedded makefile in libgit2 seems tractable. I sent out a PR here: libgit2/libgit2#776

of course i can create two makefiles if you think that would be better... i would just be nervous about keeping all 3 makefiles in sync.

[scottjg]

until we release a new version of the gem, you can point your trusty Gemfiles to the updated code with:
gem "rugged", :git => "git://github.com/libgit2/rugged.git", :branch => "development"

[bmatzelle]

Thanks Scott!

I downloaded the development version of libgit2 and compiled it with cmake using MinGW. I tried running that command above and it didn't work:

build>gem "rugged", :git => "git://github.com/libgit2/rugged.git", :branch => "development"
ERROR: While executing gem ... (RuntimeError)
Unknown command rugged,

I added "gem install" like so:

build>gem install rugged :git => "git://github.com/libgit2/rugged.git", :branch => "development"

Unfortunately that didn't work either. Error below.

ERROR: Error installing rugged:
ERROR: Failed to build gem native extension.
C:/Ruby193/bin/ruby.exe extconf.rb
*** 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.

Am I doing something wrong? I'm running Windows XP SP3.

[stereobooster]

@bmatzelle

Create Gemfile with following contents:

source :rubygems

gem "rugged", :git => "git://github.com/libgit2/rugged.git", :branch => "development"

Then run (from folder with Gemfile)

gem install bundler
bundle install

NOTE: it will not install gem globally. Read about bundler

[scottjg]

right. alternatively you can clone the rugged git repository and just gem build rugged.gemspec and install the resulting gem

[bmatzelle]

@stereobooster

Thanks for that explanation. That got me going but it didn't work on my Windows development machine until I performed some tweaks to extconf.rb. I forked the repo and added the change. Here's the commit log:

https://github.com/bmatzelle/rugged/commit/b6854a59c7e0dc4275a1ab02281fae19790d8de1

It should be cross-platform, except I'm concerned about that '/lib' directory part. Any thoughts on whether I should make a pull request on it?

BTW, I created the gem with the following Gemfile:

source :rubygems

gem "rugged", :git => "git://github.com/bmatzelle/rugged.git", :branch => "development"

Then I ran the following command on that Gemfile:

> set LIBGIT2_PATH=C:\Program Files\libgit2
> bundle install