[ccache] New ccache User - Got Some Questions
On 11 Jul 2006, Naqib Khan wrote: > Martin, > > Much appreciate the reply & useful INFO you've provided. Can you > clarify what is meant by: "It only works with gcc or compilers that > have similar external behaviour". Is the "similiar external behavior" > you are referring to the "-E" option? No, there's more to it than that. ccache makes assumptions about how the compiler behaves which are correct for gcc. This includes the command line arguments and also other things, such as that there is a single object file produced and nothing else. They may be wrong for other compilers. If you look in the list archives you can find some descriptions. > Said in another way, how do I indentify which compilers will work with > ccache? Try them? Or ask here about specific compilers, and maybe someone else will have used them. -- Martin
[ccache] New ccache User - Got Some Questions
Martin, Much appreciate the reply & useful INFO you've provided. Can you clarify what is meant by: "It only works with gcc or compilers that have similar external behaviour". Is the "similiar external behavior" you are referring to the "-E" option? Said in another way, how do I indentify which compilers will work with ccache? Thank you, Naqib -Original Message- From: Martin Pool [mailto:m...@canonical.com] Sent: Monday, July 10, 2006 7:21 PM To: Khan, Naqib (RICH2:2V90) Cc: ccache@lists.samba.org Subject: Re: [ccache] New ccache User - Got Some Questions On 11/07/2006, at 2:55 AM, Naqib Khan wrote: > Hi, > > I'm new to ccache - it does appear to be an extremely useful tool for > compiling software. I have read through all the archives, but don't > seem to specifically find the answers I'm looking for - here they are: > > 1) Does ccache only work with gcc... or can I also use it with any > arbitrary compiler? If not, which other compilers does it > specifically > support? (Note: I did see a similar question in the archives, but > that > was about 2 years ago). It only works with gcc or compilers that have similar external behaviour. (There are some niche compilers based on gcc, and the intel cc tries to be like gcc, but apparently is not close enough.) > 2) ccache usage - the documentation / information on the web indicates > that ccache is best suited for: C/C++ compiles; "clean" builds. My > question is are those the type of builds I should be targeting (i.e. > C/C++ compiles; "clean" builds)? It would appear that ccache > should be > able to speed up compiles in general regardless, due to it's > sophistication (i.e. hashing versus plain old timestamp checking). It's useful in general; it just will give the biggest proportional win when you do "make; make clean; make" > 3) In-house we also use clearmake (DOs & wink-ins) - does anybody have > experience with incorporating ccache in this type of environment? > Specifically... > 3a) I assume since ccache creates it's own object files, that ccache > would essentially _replace_ clearmake, correct? Yes, they're trying to do the same thing at different levels. Clearmake (as I understand) can cache all kinds of output, not just C/ C++ compilation; ccache is a bit simpler and doesn't depend on clearmake or clearcase, and can work with distcc for an even bigger win. > 3b) Just checking here (just in case) - before I get started on this > journey :) - has anyone successfully used ccache with clearmake? I haven't. Maybe someone else has. -- Martin
[ccache] New ccache User - Got Some Questions
On 11/07/2006, at 2:55 AM, Naqib Khan wrote: > Hi, > > I'm new to ccache - it does appear to be an extremely useful tool for > compiling software. I have read through all the archives, but don't > seem to specifically find the answers I'm looking for - here they are: > > 1) Does ccache only work with gcc... or can I also use it with any > arbitrary compiler? If not, which other compilers does it > specifically > support? (Note: I did see a similar question in the archives, but > that > was about 2 years ago). It only works with gcc or compilers that have similar external behaviour. (There are some niche compilers based on gcc, and the intel cc tries to be like gcc, but apparently is not close enough.) > 2) ccache usage - the documentation / information on the web indicates > that ccache is best suited for: C/C++ compiles; "clean" builds. My > question is are those the type of builds I should be targeting (i.e. > C/C++ compiles; "clean" builds)? It would appear that ccache > should be > able to speed up compiles in general regardless, due to it's > sophistication (i.e. hashing versus plain old timestamp checking). It's useful in general; it just will give the biggest proportional win when you do "make; make clean; make" > 3) In-house we also use clearmake (DOs & wink-ins) - does anybody have > experience with incorporating ccache in this type of environment? > Specifically... > 3a) I assume since ccache creates it's own object files, that ccache > would essentially _replace_ clearmake, correct? Yes, they're trying to do the same thing at different levels. Clearmake (as I understand) can cache all kinds of output, not just C/ C++ compilation; ccache is a bit simpler and doesn't depend on clearmake or clearcase, and can work with distcc for an even bigger win. > 3b) Just checking here (just in case) - before I get started on this > journey :) - has anyone successfully used ccache with clearmake? I haven't. Maybe someone else has. -- Martin
[ccache] New ccache User - Got Some Questions
Hi, I'm new to ccache - it does appear to be an extremely useful tool for compiling software. I have read through all the archives, but don't seem to specifically find the answers I'm looking for - here they are: 1) Does ccache only work with gcc... or can I also use it with any arbitrary compiler? If not, which other compilers does it specifically support? (Note: I did see a similar question in the archives, but that was about 2 years ago). 2) ccache usage - the documentation / information on the web indicates that ccache is best suited for: C/C++ compiles; "clean" builds. My question is are those the type of builds I should be targeting (i.e. C/C++ compiles; "clean" builds)? It would appear that ccache should be able to speed up compiles in general regardless, due to it's sophistication (i.e. hashing versus plain old timestamp checking). 3) In-house we also use clearmake (DOs & wink-ins) - does anybody have experience with incorporating ccache in this type of environment? Specifically... 3a) I assume since ccache creates it's own object files, that ccache would essentially _replace_ clearmake, correct? 3b) Just checking here (just in case) - before I get started on this journey :) - has anyone successfully used ccache with clearmake? Of course, any other general information regarding ccache would be appreciated - for example, like it's usefulness, tips & tricks, advice for first time users, etc. Thank you in advance for any help / feedback. __ Naqib
