Cool. It&#39;s great the behavior will be the same on XP and POSIX.<br>I get the following warning (treated as an error):<br><br>cc -DPD -O2 -fPIC -funroll-loops -fomit-frame-pointer -Wall -W -Wshadow -Wstrict-prototypes -Werror -Wno-unused -Wno-parentheses -Wno-switch -I../../src -I../../../../pd/src -o 
comport.o -c comport.c<br>cc1: warnings being treated as errors<br>comport.c: In function 'write_serials':<br>comport.c:1017: warning: comparison between signed and unsigned<br><br>It works if I replace line 1017 with:<br>
if (result != (int)buf_length)<br><br>Tom<br><br>