cc -c  -I../..//src/include -I../../src/include -I../..//src/libprelude-error -D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS -DDEBIAN -fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2   -DVERSION=\"\" -DXS_VERSION=\"\" -fPIC "-I/usr/lib/perl/5.8/CORE"   Prelude.c
Prelude.c: In function @_wrap_prelude_strerror':
Prelude.c:37602: error: @prelude_error_t' undeclared (first use in this function)
Prelude.c:37602: error: (Each undeclared identifier is reported only once
Prelude.c:37602: error: for each function it appears in.)
Prelude.c:37602: error: syntax error before "arg1" 
Prelude.c:37610: error: @arg1' undeclared (first use in this function)
Prelude.c: In function @_wrap_prelude_strsource':
Prelude.c:37629: error: @prelude_error_t' undeclared (first use in this function)
Prelude.c:37629: error: syntax error before "arg1" 
Prelude.c:37637: error: @arg1' undeclared (first use in this function)
Prelude.c: In function @_wrap_prelude_error_code_to_errno':
Prelude.c:37656: error: @prelude_error_code_t' undeclared (first use in this function)
Prelude.c:37656: error: syntax error before "arg1" 
Prelude.c:37665: error: @argp' undeclared (first use in this function)
Prelude.c:37669: error: @arg1' undeclared (first use in this function)

Adding
#include <prelude-error.h>
in Prelude.c
will fix this