[Nix-dev] About using clang+llvm as default 'stdenv' compiler

[Max Ivanov]

Definition of ccacheStdenv is   "ccacheStdenv = lowPrio (overrideGCC
stdenv ccacheWrapper);", you cacn create your own, which will call
clang if object isn't cached:   ccacheStdenvClang = lowPrio
(overrideGCC clangStdenv ccacheWrapper);

On Thu, Apr 24, 2014 at 9:00 AM, Luca Bruno <lethalman88 at gmail.com> wrote:
> In this way it's possible to use ccache? I don't care much about security or
> isolation, rather I'm more concerned about saving build time of webkit & co.
>
>
> On Thu, Apr 24, 2014 at 7:20 AM, Max Ivanov <ivanov.maxim at gmail.com> wrote:
>>
>> 1. Use pkgs.clangStdenv instead of pkgs.stdenv
>> 2. You'll have different hashes in /nix/store and it is up to you
>> which one to link to your profile. You can create 2 profiles one for
>> each firefox flavor.
>>
>>
>> On Thu, Apr 24, 2014 at 12:17 AM, Anderson Torres
>> <torres.anderson.85 at gmail.com> wrote:
>> > Hello, Nixers!
>> >
>> > I was thinking about a thing here.
>> >
>> > 1 - How can I set a new C compiler for stdenv? I want to use llvm+clang
>> > as
>> > default compiler toolchain when running nix-build, etc. (Yes, I like
>> > some
>> > masochistic testing...)
>> >
>> > 2 - Using a different compiler certainly affect the object code produced
>> > -
>> > and in NIX it is propagated through the /nix/store tree as a different
>> > hash.
>> > But, technically, both compilers would produce 'equivalent' object
>> > codes.
>> >
>> > The default toolchain is gcc, but my local chain is clang+llvm. So, can
>> > I
>> > use at the same time a, say, Firefox compiled by Hydra and updated on
>> > the
>> > unstable channels, and a local, 'clang7ed' version of Firefox?
>> >
>> >
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>> >
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