Hi,
another flext compile problem ;) firstly i tried....
-I/usr/lib/ -I/usr/lib/ -I/home/tom/pdcvs/devel38/pd/src/src
it seems like in your buildsys/config-pd-gcc-linux.txt file you specified the PD path including src, although you should give the plain path to the installation.
demudi:/home/tom/externals/grill/flext# ./bootstrap.sh /usr/share/aclocal/tcl.m4:20: warning: underquoted definition of SC_PATH_TCLCONFIG
Can't really comment on that... the autoconf stuff is maintained by Tim Blechmann, but will certainly be superseded by SCons
best greetings, Thomas