Description of problem:

There needs to be a reference in the package config file to the architecture-specific directory; i.e., /usr/include/x86_64-linux on 64bit systsems.

When trying to build using cmake, for example, the discovery portion only finds the reference to /usr/include. However, there are header files in /usr/include/x86_64-linux that are necessary but which are not being pointed to by the config file.


Version-Release number of selected component (if applicable):

mcpierce@mcpierce-laptop:~  $ rpm -q ruby-devel
ruby-devel-1.9.3.194-10.1.fc17.x86_64


How reproducible:

100%


Steps to Reproduce:
1. Create a cmake project that depends on Ruby.
2. Use the cmake command to generate Makefiles.
3. Use make to build.
  
Actual results:

The following results, which are due to pkgconfig not telling cmake about the platform-specific header location:

Scanning dependencies of target cqpid_ruby
[ 93%] Building CXX object bindings/qpid/ruby/CMakeFiles/cqpid_ruby.dir/rubyRUBY_wrap.o
In file included from /usr/include/ruby.h:32:0,
                 from /home/mcpierce/Programming/Qpid/cmake/bindings/qpid/ruby/rubyRUBY_wrap.cxx:856:
/usr/include/ruby/ruby.h:24:25: fatal error: ruby/config.h: No such file or directory
compilation terminated.
make[2]: *** [bindings/qpid/ruby/CMakeFiles/cqpid_ruby.dir/rubyRUBY_wrap.o] Error 1
make[1]: *** [bindings/qpid/ruby/CMakeFiles/cqpid_ruby.dir/all] Error 2
make: *** [all] Error 2


Expected results:

Compilation to complete successfully.

Additional info: