Hello, Actually, the google aosp code has the schema I mentioned. I just don't want to change it in our makefiles(nor can I influence the upstream) (they use clang)
As far as my patch, I used objdump to see that there are no absolute paths. Thanks, Venkat. On Sat, Sep 16, 2017 at 1:16 PM, Anders Björklund via ccache < ccache@lists.samba.org> wrote: > Karanam Suryanarayana Rao Venkata Krishna wrote: > > Hello, > > I think I discovered a scenario that results in cache misses in spite of > > using CCACHE_BASEDIR. > > Consider the following command: > > > > CCACHE_BASEDIR=$PWD /bin/bash -c "ccache clang++ > > -fdebug-prefix-map=/proc/self/cwd= -g -c -MD -MF hello.d -o hello.o > > hello.cpp" > > > > It seems to me that is is perfectly alright to ask for debug prefix > mapping > > like: "-fdebug-prefix-map=/proc/self/cwd=" > > Unfortunately, ccache is ending up hashing gnu_getcwd(); thus, even > though > > we use CCACHE_BASEDIR setting, such a cache cannot be shared by other > > users' from different workspaces resulting in cache misses. > ... > > > > If the string after "=" in the mapping is null string, then, I hash "./". > > Can't you just use "$PWD" and ".", instead of this elaborate scheme ? > > Especially since using /proc/self/cwd doesn't even work, not with GCC... > i.e. when you give that prefix, it will just look for that path string > > In the actual debug info, you will _still_ have a reference the cwd. > > /Anders > _______________________________________________ > ccache mailing list > ccache@lists.samba.org > https://lists.samba.org/mailman/listinfo/ccache > _______________________________________________ ccache mailing list ccache@lists.samba.org https://lists.samba.org/mailman/listinfo/ccache
