Description of problem:

The /usr/include/slang/slcurses.h file contains:

 #include <slang.h>

but it does not work because slang-devel uses slang/ subdirectory for all headers. The another problem is that 

  pkg-config --cflags slang

does not return -I/usr/include/slang.

I think the best way how to fix this problem is to use "#include <slang/slang.h>" in /usr/include/slang/slcurses.h.

It would be also nice to add -I/usr/include/slang to slang.pc.


The workaround is to explicitly include slang.h in all applications where is necessary slcurses.h, for example:

 #include <slang/slang.h>
 #include <slang/slcurses.h>

I didn't test it, but I guess that the same problem exists in F-13 rawhide and RHEL6.