Ticket #308 (defect)

System: Cygwin, Current version
GNU Radio: SVN 9750, Trunk

When building gr-howto-write-a-block (or any self-written block based on gr-howto-write-a-block), gruel is not found. The SWIG include path does not include /usr/local/include.

Relevant error message from "./bootstrap && ./configure && make":

make[3]: Entering directory `/home/friesengeist/gnuradio/gnuradio-trunk/gr-howto-write-a-block/src/lib'
/usr/bin/swig -c++ -fvirtual -python -modern -I/usr/local/include/gnuradio/swig -I/usr/local/include/gnuradio -module howto -o howto.cc ../../src/lib/howto.i
/usr/local/include/gnuradio/swig/gr_realtime.i:3: Error: Unable to find 'gruel/realtime.h'
make[3]: *** [howto.cc] Error 1

Creating a symlink from /usr/local/include/gnuradio/gruel to /usr/local/include/gruel or applying the attached patch "works for me". I don't know if it's the right thing to do, though, I'm new to the make system.