Checking if your kit is complete...
Looks good
Writing Makefile for BTRIEVE::Native
cp Native.pm blib/lib/BTRIEVE/Native.pm
/export/home/cpanrun/build/5.6.1/bin/perl -I/export/home/cpanrun/build/5.6.1/lib/5.6.1/sun4-solaris-thread-multi -I/export/home/cpanrun/build/5.6.1/lib/5.6.1 /export/home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/xsubpp  -typemap /export/home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/typemap Native.xs > Native.xsc && mv Native.xsc Native.c
gcc -c  -DUSE_REENTRANT_API -D_POSIX_PTHREAD_SEMANTICS -D_REENTRANT -fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O   -DVERSION=\"0.03\" -DXS_VERSION=\"0.03\" -fPIC -I/export/home/cpanrun/build/5.6.1/lib/5.6.1/sun4-solaris-thread-multi/CORE  Native.c
Native.xs:8: parse error before `BTRCALL'
Native.xs:17: warning: data definition has no type or storage class
make: *** [Native.o] Error 1