[ptx] problems with cvs snapshot of libpano12

[Rich]

first, thanks for the cvs snapshots - hopefully they will make it easier 
to test new features and problems before releases :)

using a cvs snapshot downloaded a couple of hours ago.
now, some problems and questions :

1. in slackware, bootstrapping/configuring libpano still requires 
exporting of CFLAGS="-lm";

2. compiling of libpano12 fails - possibly because of some libraries, 
invoked with -lm. some last lines :

gcc: -lm: linker input file unused because linking not done
/bin/sh ../libtool --tag=CC --mode=link gcc  -lm -L..  -o PTmender 
PTmender.o ColourBrightness.o PTcommon.o -lpano12 -ljpeg
-ltiff
gcc -o .libs/PTmender PTmender.o ColourBrightness.o PTcommon.o 
-L/install/pano/cvs/libpano /install/pano/cvs/libpano/.libs/l
ibpano12.so -lpng /usr/lib/libtiff.so -ljpeg -lz -lm -lc
PTmender.o(.text+0x625): In function `main':
: undefined reference to `InsertFileName'
PTmender.o(.text+0x82e): In function `main':
: undefined reference to `InsertFileName'
collect2: ld returned 1 exit status
make[2]: *** [PTmender] Error 1
make[2]: Leaving directory `/install/pano/cvs/libpano/tools'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/install/pano/cvs/libpano'
make: *** [all] Error 2

what could be causing this and what can i do to fix it ?
i was using ./bootstrap && ./configure && ./make sequence

3. i'm thinking about building libpano and hugin with debugging symbols 
included (so that possibly useful backtraces could be gathered), but was 
unable to find anything related to debugging in libpano configure help.
what steps must i take to ensure debugging information is included in 
the final build ?
-- 
  Rich