Having difficulty installing ruby-filemagic gem on new RHEL6 server - ruby

Question

It appears to be looking for the libmagic.so.1 file. I have that file. It is located in /usr/lib64. I am not running this installation as the root user.
I am also using rvm and Bundler. This is the result of my "bundle" command, when it gets to the ruby-filemagic line in my Gemfile:
[server#mine ext]$ ruby extconf.rb --with-magiclib
checking for magic_open() in -ltrue... no
*** ERROR: missing required library to compile this module
*** 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.
UPDATE:
Here are the results of the mkmf.log:
have_library: checking for magic_open() in -ltrue... -------------------- no
"gcc -o conftest -I. -I/usr/local/rvm/rubies/ruby-1.8.7-p358/lib/ruby/1.8/x86_64-linux -I. -g -O2 -fPIC conftest.c -L. -L/usr/local/rvm/rubies/ruby-1.8.7-p358/lib -Wl,-R/usr/local/rvm/rubies/ruby-1.8.7-p358/lib -L. -rdynamic -Wl,-export-dynamic -lruby-static -ltrue -lrt -ldl -lcrypt -lm -lc"
conftest.c: In function ‘t’:
conftest.c:3: error: ‘magic_open’ undeclared (first use in this function)
conftest.c:3: error: (Each undeclared identifier is reported only once
conftest.c:3: error: for each function it appears in.)
checked program was:
/* begin */
1: /*top*/
2: int main() { return 0; }
3: int t() { void ((*volatile p)()); p = (void ((*)()))magic_open; return 0; }
/* end */
"gcc -o conftest -I. -I/usr/local/rvm/rubies/ruby-1.8.7-p358/lib/ruby/1.8/x86_64-linux -I. -g -O2 -fPIC conftest.c -L. -L/usr/local/rvm/rubies/ruby-1.8.7-p358/lib -Wl,-R/usr/local/rvm/rubies/ruby-1.8.7-p358/lib -L. -rdynamic -Wl,-export-dynamic -lruby-static -ltrue -lrt -ldl -lcrypt -lm -lc"
/usr/bin/ld: cannot find -ltrue
collect2: ld returned 1 exit status
checked program was:
/* begin */
1: /*top*/
2: int main() { return 0; }
3: int t() { magic_open(); return 0; }
/* end */
I can't figure out what to do to make this work.

Answer 1

Had same problem on Ubuntu 12.04. Just installed libmagic-dev package through following command:
sudo apt-get install libmagic-dev

Answer 2

On a Mac, using homebrew:
sudo brew install libmagic

Answer 3

I needed to do:
yum install file-devel
That apparently contains the libmagic header files that the filemagic ruby gem required in order to compile. It worked like a champ after that.

Answer 4

I had the same problem on OpenSuse 11.3. This helped:
zypper install file-devel