ext widow可以旋转吗

来源：蜘蛛抓取(WebSpider) 时间：2015-10-23 09:12 标签： windows读取ext4
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when trying to install bson_ext i see the error...installing json gem works fine which also requires building native extensions - i have tried everything see similar questions with no good answer
$ gem install bson_ext
Temporarily enhancing PATH to include DevKit...
Building native extensions.
This could take a while...
Error installing bson_ext:
ERROR: Failed to build gem native extension.
c:/Ruby193/bin/ruby.exe extconf.rb
checking for asprintf()... no
checking for ruby/st.h... yes
checking for ruby/regex.h... yes
checking for ruby/encoding.h... yes
creating Makefile
generating cbson-i386-mingw32.def
compiling bson_buffer.c
compiling cbson.c
cbson.c:25:23: fatal error: arpa/inet.h: No such file or directory
compilation terminated.
make: *** [cbson.o] Error 1
Gem files will remain installed in c:/Ruby193/lib/ruby/gems/1.9.1/gems/bson_ext-
1.11.1 for inspection.
Results logged to c:/Ruby193/lib/ruby/gems/1.9.1/gems/bson_ext-1.11.1/ext/cbson/
gem_make.out
$ gem install json
Temporarily enhancing PATH to include DevKit...
Building native extensions.
This could take a while...
Successfully installed json-1.8.1
1 gem installed
Installing ri documentation for json-1.8.1...
Installing RDoc documentation for json-1.8.1...
According to
&arpa/inet.h& is not a windows library, so winsock2.h should be used instead.
To change this reference, I've done the following**:
Go to your installation folder (c:/Ruby193/lib/ruby/gems/1.9.1/gems/bson_ext-1.11.1)
Drill down a level into the cbson folder and find cbson.c
Open cbson.c in your favorite text editor and find the line that reads #include "&arpa/inet.h&"
Change that line to #include winsock2.h
Open a command prompt, browse to the installation folder, and run gem build bson_ext.gemspec
Move the newly-created .gem file someplace safe (%userprofile%\Desktop, for example).
Go up to the gem folder and delete the entire bson_ext folder
Back in your command prompt window, change directory to wherever you placed the newly-created .gem file (cd %userprofile%\Desktop, if you're following these steps exactly)
Run gem install bson_ext-1.11.1.gem --local and the gem should now install successfully.
** Huge caveat: I am just running through a mongodb for rails tutorial and I don't have any functioning code with which to test this. While this removes the installation error, I have no way of determining if this fix is a complete one. This library reference is new for the 1.11.1 release. If you install version 1.10.2 this issue will not occur (gem install bson_ext -v 1.10.2). I'll leave it to you to decide which solution makes more sense for you.
Edit: Based on
on github, a better fix would be to change that include to read like this:
#ifdef _WIN32
#include &winsock2.h&
#include &arpa/inet.h&
is not needed when compiling on DevKit.
To prevent this error it is enough to create an empty file at the expected location. If your DevKit was installed in C:\DevKit, the file would be expected at C:\DevKit\mingw\include\arpa\inet.h
This should also fix other native gems. The reasons is, that definitions usually coming from arpa/inet.h are already coming from other include files that are automatically included most of the time.
Use this command
gem update --system 2.3.0
I just updated my gem to an older version (from 2.4.6 to 2.3) and that worked.
2,67311127
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