RedHat perl in UTF-8 locale may not build Tk /usr/bin/perl is installed in /usr/lib/perl5/5.8.5/i386-linux-thread-multi okay PPM for perl5.008005 Test Compiling config/signedchar.c Test Compiling config/Ksprintf.c Test Compiling config/tod.c Test Compiling -DTIMEOFDAY_TZ config/tod.c TZ gettimeofday() Using -L/usr/X11R6/lib to find /usr/X11R6/lib/libX11.so.6.2 Cannot find X include files via /usr/X11R6/include Cannot find X include files anywhere at ./myConfig line 332. Compilation failed in require at Makefile.PL line 36. BEGIN failed--compilation aborted at Makefile.PL line 38.