ERROR: Failed to build gem native extension

Server Mongrel
1

Hello, I am currently not able to instal mongrel, I run a Linux Ubuntu
10.04
system with Gems 1.3.7 when I do a “sudo gem install mongrel” I get this
sequence of messages:
$ sudo gem install mongrel
Building native extensions. This could take a while…
ERROR: Error installing mongrel:

ERROR: Failed to build gem native extension.

/usr/local/bin/ruby extconf.rb checking for main() in -lc… yes
creating Makefile

make
gcc -I. -I/usr/local/include/ruby-1.9.1/i686-linux
-I/usr/local/include/ruby-1.9.1/ruby/backward
-I/usr/local/include/ruby-1.9.1 -I. -D_FILE_OFFSET_BITS=64 -fPIC -O3
-ggdb
-Wextra -Wno-unused-parameter -Wno-parentheses -Wpointer-arith
-Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -o
http11.o
-c http11.c
http11.c: In function http_field:
http11.c:70: warning: format not a string literal and no format
arguments
http11.c:71: warning: format not a string literal and no format
arguments
http11.c:77: error: struct RString has no member named ptr
http11.c:77: error: struct RString has no member named len
http11.c: In function request_uri:
http11.c:102: warning: format not a string literal and no format
arguments
http11.c: In function fragment:
http11.c:113: warning: format not a string literal and no format
arguments
http11.c: In function request_path:
http11.c:124: warning: format not a string literal and no format
arguments
http11.c: In function query_string:
http11.c:135: warning: format not a string literal and no format
arguments
http11.c: In function header_done:
http11.c:172: error: struct RString has no member named ptr
http11.c:172: error: struct RString has no member named ptr
http11.c:172: error: struct RString has no member named ptr
http11.c:174: error: struct RString has no member named ptr
http11.c:176: error: struct RString has no member named ptr
http11.c:177: error: struct RString has no member named len
http11.c: In function HttpParser_execute:
http11.c:298: error: struct RString has no member named ptr
http11.c:299: error: struct RString has no member named len
http11.c:307: warning: format not a string literal and no format
arguments
make: *** [http11.o] Error 1

Gem files will remain installed in
/usr/local/lib/ruby/gems/1.9.1/gems/mongrel-1.1.5 for inspection.
Results logged to
/usr/local/lib/ruby/gems/1.9.1/gems/mongrel-1.1.5/ext/http11/gem_make.out

Would you please help me?
Thank you in advance for your valuable time.

2

On Thu, Dec 2, 2010 at 9:48 PM, Luis Flores
[email protected] wrote:

Hello, I am currently not able to instal mongrel, I run a Linux Ubuntu 10.04
system with Gems 1.3.7 when I do a “sudo gem install mongrel” I get this
sequence of messages:

[SNIP]

$ sudo gem install mongrel
gcc -I. -I/usr/local/include/ruby-1.9.1/i686-linux
-I/usr/local/include/ruby-1.9.1/ruby/backward
-I/usr/local/include/ruby-1.9.1 -I. -D_FILE_OFFSET_BITS=64 -fPIC -O3 -ggdb
-Wextra -Wno-unused-parameter -Wno-parentheses -Wpointer-arith
-Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -o http11.o
-c http11.c
/usr/local/lib/ruby/gems/1.9.1/gems/mongrel-1.1.5/ext/http11/gem_make.out

Would you please help me?

Mongrel 1.1.5 is not compatible with Ruby 1.9.x

You need to install the pre-release version:

gem install mongrel --pre

Luis L.
AREA 17

Perfection in design is achieved not when there is nothing more to add,
but rather when there is nothing more to take away.
Antoine de Saint-Exupry

3

I was racking my brain around with this one for a while and finally got
it working on Ubuntu 10.10…

$ cd /var/lib/gems/1.9.1/cache #it could be 1.9.1 or another directory
#depending on how you intalled ruby

$ pwd #make damn sure you are in the right one
:wink:
/var/lib/gems/1.9.1/cache/

$ sudo rm *

$ gem install mongrel -v 1.2.0.pre2 --pre --source http://rubygems.org

I am pretty sure the post above will work too i.e
$ gem install mongrel --pre

I didn’t get a chance to try it but the key is if your having problems
even with the --pre its because gems is looking in its cache files to
save you time and thus --pre doesn’t help