--- ccache.1.orig Mon Sep 13 06:38:30 2004 +++ ccache.1 Tue Nov 15 14:59:46 2005 @@ -234,6 +234,16 @@ incorrect setting of this debug info rarely causes problems\&. If you strike problems with gdb not using the correct directory then enable this option\&. +.IP +.IP "\fBCCACHE_NOHASH_SIZE_MTIME\fP" +This tells ccache to not hash the real compiler's size and modification +time. Normally this is the mechanism to detect compiler upgrades. +There are situations however, where even though the compiler's size or +modification time has changed you can safely use the cached objects +(e.g. if as part of your build system the compiler is built as well +and the compiler's source has not changed; or if the compiler has only +changes that do not affect code generation). Use this feature only if +you know what you are doing. .IP .IP "\fBCCACHE_UNIFY\fP" If you set the environment variable CCACHE_UNIFY