Checking if your kit is complete...
Looks good
Writing Makefile for Sys::Mmap
cp Mmap.pm blib/lib/Sys/Mmap.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 -typemap typemap Mmap.xs > Mmap.xsc && mv Mmap.xsc Mmap.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=\"0.13\" -DXS_VERSION=\"0.13\" -fPIC -I/export/home/cpanrun/build/5.6.1/lib/5.6.1/sun4-solaris-thread-multi/CORE  Mmap.c
Mmap.xs: In function `XS_Sys__Mmap_mmap':
Mmap.xs:157: `MAP_ANON' undeclared (first use in this function)
Mmap.xs:157: (Each undeclared identifier is reported only once
Mmap.xs:157: for each function it appears in.)
make: *** [Mmap.o] Error 1