Doesn't do recursive searches

[Immortalin]

When I tried to #include headers under the following path: /usr/include/guile/2.0, I received the following error:

libguile.2.0.h not found in:
./
/usr/lib/gcc/x86_64-linux-gnu/5/include/
/usr/local/include/
/usr/lib/gcc/x86_64-linux-gnu/5/include-fixed/
/usr/include/x86_64-linux-gnu/
/usr/include/
/usr/lib/gcc/x86_64-linux-gnu/5/include/
/usr/local/include/
/usr/lib/gcc/x86_64-linux-gnu/5/include-fixed/
/usr/include/x86_64-linux-gnu/
/usr/include/
 at 
stack traceback:
    /usr/local/share/luajit-2.1.0-beta1/ffiex/init.lua:61: in function 'search_header_file'
    /usr/local/share/luajit-2.1.0-beta1/ffiex/init.lua:67: in function 'compileFile'
    /usr/local/share/luajit-2.1.0-beta1/ffiex/lcpp.lua:828: in function 'processLine'
    /usr/local/share/luajit-2.1.0-beta1/ffiex/lcpp.lua:817: in function '_doWork'
    /usr/local/share/luajit-2.1.0-beta1/ffiex/lcpp.lua:824: in function </usr/local/share/luajit-2.1.0-beta1/ffiex/lcpp.lua:824>
stack traceback:
    [C]: in function '(for generator)'
    /usr/local/share/luajit-2.1.0-beta1/ffiex/lcpp.lua:1538: in function 'compile'
    /usr/local/share/luajit-2.1.0-beta1/ffiex/init.lua:290: in function 'parse'
    /usr/local/share/luajit-2.1.0-beta1/ffiex/init.lua:310: in function 'cdef'
    stdin:1: in main chunk
    [C]: at 0x00404790

This was fixed by explicitly including the path i.e. ffi.cdef("#include <guile/2.0/libguile.h>"), however, this gives the following error:

/usr/local/share/luajit-2.1.0-beta1/ffiex/lcpp.lua:1538: /usr/local/share/luajit-2.1.0-beta1/ffiex/lcpp.lua:1538: /usr/local/share/luajit-2.1.0-beta1/ffiex/init.lua:61: libguile/__scm.h not found in:
./
/usr/lib/gcc/x86_64-linux-gnu/5/include/
/usr/local/include/
/usr/lib/gcc/x86_64-linux-gnu/5/include-fixed/
/usr/include/x86_64-linux-gnu/
/usr/include/
/usr/lib/gcc/x86_64-linux-gnu/5/include/
/usr/local/include/
/usr/lib/gcc/x86_64-linux-gnu/5/include-fixed/
/usr/include/x86_64-linux-gnu/
/usr/include/
 at 
stack traceback:
    /usr/local/share/luajit-2.1.0-beta1/ffiex/init.lua:61: in function 'search_header_file'
    /usr/local/share/luajit-2.1.0-beta1/ffiex/init.lua:67: in function 'compileFile'
    /usr/local/share/luajit-2.1.0-beta1/ffiex/lcpp.lua:828: in function 'processLine'
    /usr/local/share/luajit-2.1.0-beta1/ffiex/lcpp.lua:817: in function '_doWork'
    /usr/local/share/luajit-2.1.0-beta1/ffiex/lcpp.lua:824: in function </usr/local/share/luajit-2.1.0-beta1/ffiex/lcpp.lua:824>
stack traceback:
    [C]: in function '(for generator)'
    /usr/local/share/luajit-2.1.0-beta1/ffiex/lcpp.lua:1538: in function 'compile'
    /usr/local/share/luajit-2.1.0-beta1/ffiex/init.lua:290: in function 'parse'
    /usr/local/share/luajit-2.1.0-beta1/ffiex/init.lua:310: in function 'cdef'
    stdin:1: in mhttps://www.gnu.org/software/guile/docs/guile-tut/tutorial.htmlain chunk
    [C]: at 0x00404790

__scm.h is a header linked in the libguile.h header file. Reference: https://www.gnu.org/software/guile/docs/guile-tut/tutorial.html