Re: [Boost-users] Use of ccache with Boost

Subject: Re: [Boost-users] Use of ccache with Boost
From: Roland Bock (rbock_at_[hidden])
Date: 2009-10-05 13:13:01

Dalton, Tom wrote:
> Further to my questions from last week:
> 
> I've tried both methods - first I tried changing the toolset to make the
> gcc toolset use "ccache g++" as the compiler executable. I had some
> problems with that, so I tried the symlink approach suggested by Roland.
> This is also failing, with some seemingly very subtle bug that I can't
> suss out.
> 
> The build progresses a little way, until it gets to
> libs/program_options/src/cmdline.cpp
> 
> When g++ isn't a symlink to ccache, I get the following output as shown
> by the attachment build.log.1.fragment.
> When I have gcc & g++ symlinks in the ccache bin dir pointing to ccache
> (the PATH is ccache/bin:real_gcc/bin), the output is like the second
> attachment and the file fails.

Hmm? What symlinks do you have in the ccache folder? I only required 
symlinks in /usr/local/bin, as described here 
http://ccache.samba.org/ccache-man.html

I am using 4.2.4 and boost compiles with no problems at all. In daily 
life, I am using CMake, like Mathieu, but direct calls to g++ or 
compilation with configure&make never failed on me.

Regards,

Roland

> 
> The build logs diverge from that point onwards as more and more stuff
> either fails, or is skipped due to previous failures.
> 
> There are 2 issues that I can see from those logs. Firstly the line
> numbering on the .hpp includes is one-out on the ccache-enabled build.
> Does this mean the preprocessor is behaving strangely? Secondly, on line
> 15 of the failing fragment file, it looks like part of the output is cut
> off (at the end of the line, it gets
> "boost::_bi::list2<boost::_bi::v0.000008 sec system; 0.000164 sec user".
> 
> Can anyone help me? I don't know what would cause either of these
> issues.
> 
> Tom
> 
> PS Using gcc 4.4.1, ccache 2.4 and tried boost 1.39.0 and 1.40.0, with
> the same results.
> 
> 
> -----Original Message-----
> From: boost-users-bounces_at_[hidden]
> [mailto:boost-users-bounces_at_[hidden]] On Behalf Of Dalton, Tom
> Sent: 29 September 2009 16:20
> To: boost-users_at_[hidden]
> Subject: Re: [Boost-users] Use of ccache with Boost
> 
> Daniel and Roland,
> 
> Thanks guys, that gives me some good avenues to explore.
> 
> Tom
> 
> -----Original Message-----
> From: boost-users-bounces_at_[hidden]
> [mailto:boost-users-bounces_at_[hidden]] On Behalf Of Daniel James
> Sent: 29 September 2009 16:07
> To: boost-users_at_[hidden]
> Subject: Re: [Boost-users] Use of ccache with Boost
> 
> 2009/9/29 Dalton, Tom <tom.dalton_at_[hidden]>:
>> I'm using Boost on Linux however for various reasons I need to rebuild
> 
>> parts of it occasionally. For other C/C++-based tools that are built 
>> with autoconf/automake, I've started to use ccache
>> (http://ccache.samba.org/) to speed up recompilation. This is done 
>> simply by setting the CC / CXX environment variables to "ccache gcc" /
> 
>> "ccache g++" respectively. I have had a look through the Jam 
>> documentation but I can't see an easy way to achieve the same thing 
>> when building the Boost distribution. The closest I came was a bit on 
>> the trac that simply said I can add a new toolset, but had no real
> instructions as to how.
> 
> Create a file called 'user-config.jam' in your home directory,
> containing something like:
> 
> using gcc : : ccache g++ ;
> 
> Or possibly with the version number:
> 
> using gcc : 4.4 : ccache g++-4.4 ;
> 
> For more information see:
> 
> http://www.boost.org/doc/libs/1_40_0/doc/html/bbv2/advanced.html#bbv2.ad
> vanced.configuration
> 
> Daniel
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