[gentoo-user] ccache: unsupported compiler option

[gentoo-user] ccache: unsupported compiler option

[Justin Findlay]

I'm trying to find out why ccache won't cache anything.  Building and
maintaining for three months an entire system got me all of 5 cache
hits.  What can I do to encourace more cache usage?  One of the methods
I'm investigating is to determine and eliminate CFLAGS arguments that
may cause 'unsupported compiler option' to be incremented.  Is there
anything else I can try?

# ccache -s
cache directory                     /var/tmp/ccache
cache hit                              5
cache miss                           153
called for link                    14836
multiple source files                 87
compile failed                         2
preprocessor error                  1732
bad compiler arguments                 1
not a C/C++ file                    4774
autoconf compile/link              28079
unsupported compiler option         2569
no input file                       8965
files in cache                       306
cache size                           4.3 Mbytes
max cache size                       2.5 Gbytes

# grep CFLAGS /etc/make.conf
CFLAGS="-march=athlon64 -mtune=athlon64 -m64 -O3 -fmessage-length=0 -pipe"
CXXFLAGS="${CFLAGS}"


Justin
-- 
gentoo-user@gentoo.org mailing list

Re: [gentoo-user] ccache: unsupported compiler option

[Dale]

Justin Findlay wrote:
> I'm trying to find out why ccache won't cache anything.  Building and
> maintaining for three months an entire system got me all of 5 cache
> hits.  What can I do to encourace more cache usage?  One of the methods
> I'm investigating is to determine and eliminate CFLAGS arguments that
> may cause 'unsupported compiler option' to be incremented.  Is there
> anything else I can try?
>
> # ccache -s
> cache directory                     /var/tmp/ccache
> cache hit                              5
> cache miss                           153
> called for link                    14836
> multiple source files                 87
> compile failed                         2
> preprocessor error                  1732
> bad compiler arguments                 1
> not a C/C++ file                    4774
> autoconf compile/link              28079
> unsupported compiler option         2569
> no input file                       8965
> files in cache                       306
> cache size                           4.3 Mbytes
> max cache size                       2.5 Gbytes
>
> # grep CFLAGS /etc/make.conf
> CFLAGS="-march=athlon64 -mtune=athlon64 -m64 -O3 -fmessage-length=0 -pipe"
> CXXFLAGS="${CFLAGS}"
>
>
> Justin
>   

Well, I have been using mine longer than that.  I have even done a
emerge -e world a couple times.

> root@smoker / # ccache -s
> cache hit                              0
> cache miss                             0
> files in cache                         0
> cache size                             0 Kbytes
> max cache size                     768.0 Mbytes
> root@smoker / #

Looks like you are not alone.

Dale

:-)  :-)
-- 
gentoo-user@gentoo.org mailing list

Re: [gentoo-user] ccache: unsupported compiler option

[Alexander Kirillov]

> I'm trying to find out why ccache won't cache anything.  Building and
> maintaining for three months an entire system got me all of 5 cache
> hits.  What can I do to encourace more cache usage?  One of the methods
> I'm investigating is to determine and eliminate CFLAGS arguments that
> may cause 'unsupported compiler option' to be incremented.  Is there
> anything else I can try?
> 
> # ccache -s
> cache directory                     /var/tmp/ccache
> cache hit                              5
> cache miss                           153
> called for link                    14836
> multiple source files                 87
> compile failed                         2
> preprocessor error                  1732
> bad compiler arguments                 1
> not a C/C++ file                    4774
> autoconf compile/link              28079
> unsupported compiler option         2569
> no input file                       8965
> files in cache                       306
> cache size                           4.3 Mbytes
> max cache size                       2.5 Gbytes
> 
> # grep CFLAGS /etc/make.conf
> CFLAGS="-march=athlon64 -mtune=athlon64 -m64 -O3 -fmessage-length=0 -pipe"
> CXXFLAGS="${CFLAGS}"

Have you tried http://gentoo-wiki.com/Ccache?


-- 
gentoo-user@gentoo.org mailing list

Re: [gentoo-user] ccache: unsupported compiler option

[Justin Findlay]

On Sat, Aug 12, 2006 at 04:33:30PM -0500, Dale wrote:
> root@smoker / # ccache -s
> cache hit                              0
> cache miss                             0
> files in cache                         0
> cache size                             0 Kbytes
> max cache size                     768.0 Mbytes
> root@smoker / #

Try `CCACHE_DIR="/var/tmp/ccache" ccache -s` and see if you get anything
different.


Justin
-- 
gentoo-user@gentoo.org mailing list

Re: [gentoo-user] ccache: unsupported compiler option

[Dale]

Justin Findlay wrote:
> On Sat, Aug 12, 2006 at 04:33:30PM -0500, Dale wrote:
>   
>> root@smoker / # ccache -s
>> cache hit                              0
>> cache miss                             0
>> files in cache                         0
>> cache size                             0 Kbytes
>> max cache size                     768.0 Mbytes
>> root@smoker / #
>>     
>
> Try `CCACHE_DIR="/var/tmp/ccache" ccache -s` and see if you get anything
> different.
>
>
> Justin
>   

Strange.

> root@smoker / # CCACHE_DIR="/var/tmp/ccache" ccache -s
> cache hit                          76331
> cache miss                        157987
> called for link                    16817
> multiple source files                112
> compile failed                      5118
> preprocessor error                  4269
> bad compiler arguments                 2
> not a C/C++ file                    6042
> autoconf compile/link              55706
> unsupported compiler option         3205
> no input file                      23230
> files in cache                     59867
> cache size                         872.9 Mbytes
> max cache size                     976.6 Mbytes
> root@smoker / #

At least it is working.  Now why is it not reporting it with just ccache
-s like it should??

Dale

:-)  :-)
-- 
gentoo-user@gentoo.org mailing list

Re: [gentoo-user] ccache: unsupported compiler option

[Dale]

Dale wrote:
>
> Strange.
> root@smoker / # CCACHE_DIR="/var/tmp/ccache" ccache -s
> cache hit                          76331
> cache miss                        157987
> called for link                    16817
> multiple source files                112
> compile failed                      5118
> preprocessor error                  4269
> bad compiler arguments                 2
> not a C/C++ file                    6042
> autoconf compile/link              55706
> unsupported compiler option         3205
> no input file                      23230
> files in cache                     59867
> cache size                         872.9 Mbytes
> max cache size                     976.6 Mbytes
> root@smoker / #
>   
>
> At least it is working.  Now why is it not reporting it with just ccache
> -s like it should??
>
> Dale
>
> :-)  :-)
>   

This helped:

> echo "CCACHE_DIR=\"/var/tmp/ccache\"" >> /etc/env.d/99local 
>  env-update && source /etc/profile

Now I get this:

> root@smoker / # ccache -s
> cache hit                          76331
> cache miss                        157987
> called for link                    16817
> multiple source files                112
> compile failed                      5118
> preprocessor error                  4269
> bad compiler arguments                 2
> not a C/C++ file                    6042
> autoconf compile/link              55706
> unsupported compiler option         3205
> no input file                      23230
> files in cache                     59867
> cache size                         872.9 Mbytes
> max cache size                     976.6 Mbytes
> root@smoker / #   

Dale
:-)  :-)
-- 
gentoo-user@gentoo.org mailing list

[gentoo-user] Re: ccache: unsupported compiler option

[Justin Findlay]

While doing some investigating I found over 40000 files in
/var/tmp/ccache named tmp.hash.<hostname>.<number> and
tmp.stderr.<hostname>.<number>.  These files seem to be cache files that
are for some reason not being stored in the cache index located at
/var/tmp/ccahce/[0-9a-e]/[0-9a-e].  It seems that ccache is caching data
but not storing it correctly and therefore cannot retrieve it.


Justin
-- 
gentoo-user@gentoo.org mailing list