mimi@mimi-PC ~
$ export CYGWIN=nodosfilewarning

mimi@mimi-PC ~
$ SRCS=C:/Users/mimi/swig/Examples/perl5/simple/example.c

mimi@mimi-PC ~
$ OBJS=C:/Users/mimi/swig/Examples/perl5/simple/example.o

mimi@mimi-PC ~
$ LIBPATH="-LC:/strawberry/perl/lib/CORE -LC:/strawberry/c/lib"

mimi@mimi-PC ~
$ LIBS=-lperl512

mimi@mimi-PC ~
$ cd C:/Users/mimi/swig/Examples/perl5/simple

mimi@mimi-PC /cygdrive/c/Users/mimi/swig/Examples/perl5/simple
$ ../../../swig -perl5 example.i

mimi@mimi-PC /cygdrive/c/Users/mimi/swig/Examples/perl5/simple
$ gcc -c $SRCS

mimi@mimi-PC /cygdrive/c/Users/mimi/swig/Examples/perl5/simple
$ gcc -shared $OBJS $LIBPATH $LIBS -o example.dll

mimi@mimi-PC /cygdrive/c/Users/mimi/swig/Examples/perl5/simple
$ perl -Mexample
Can't find 'boot_example' symbol in ./example.dll
 at example.pm line 11
Compilation failed in require.
BEGIN failed--compilation aborted.