root@szolke:/usr/src/spandsp-0.0.3# make
Making all in src
make[1]: Entering directory `/usr/src/spandsp-0.0.3/src'
make  all-am
make[2]: Entering directory `/usr/src/spandsp-0.0.3/src'
if /bin/sh ../libtool --tag=CC --mode=compile gcc -DHAVE_CONFIG_H -I. -I. -I. -I..    -std=c99 -Wall -Wunused-variable -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -g -O2 -MT at_interpreter.lo -MD -MP -MF ".deps/at_interpreter.Tpo" -c -o at_interpreter.lo at_interpreter.c; \
        then mv -f ".deps/at_interpreter.Tpo" ".deps/at_interpreter.Plo"; else rm -f ".deps/at_interpreter.Tpo"; exit 1; fi
 gcc -DHAVE_CONFIG_H -I. -I. -I. -I.. -std=c99 -Wall -Wunused-variable -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -g -O2 -MT at_interpreter.lo -MD -MP -MF .deps/at_interpreter.Tpo -c at_interpreter.c  -fPIC -DPIC -o .libs/at_interpreter.o
at_interpreter.c: In function 'command_search':
at_interpreter.c:5122: error: 'COMMAND_TRIE_LEN' undeclared (first use in this function)
at_interpreter.c:5122: error: (Each undeclared identifier is reported only once
at_interpreter.c:5122: error: for each function it appears in.)
at_interpreter.c:5131: error: 'command_trie' undeclared (first use in this function)
at_interpreter.c: In function 'at_interpreter':
at_interpreter.c:5247: error: 'at_commands' undeclared (first use in this function)
make[2]: *** [at_interpreter.lo] Error 1
make[2]: Leaving directory `/usr/src/spandsp-0.0.3/src'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/usr/src/spandsp-0.0.3/src'
make: *** [all-recursive] Error 1