svn update your haiku source too & that should let gcc4 compile. See here: http://dev.haiku-os.org/attachment/ticket/3021/wnoerror.patch http://dev.haiku-os.org/ticket/3021 Regards, > Hi all, > > today I tried to use hybrid builds (specifically gcc4 with a gcc2 > alternate). > After updating buildtools etc, I started up the configure step for the > gcc2, which worked fine. > > Trying to build the gcc4 though failed. _________________________________________________________________