[opensource-dev] Building viewer-release on OS X.

[Ash Qin]

Just an update if anyone else is interested in using ccache on OS X.

Replacing the symlinks used for compilers in
/Applications/Xcode.app/Contents/Developer/usr/bin/ to the ccache
binary was sufficient to use ccache.

I will say that I am not very big on the whole replacing of system
files instead of using UNIX standard local paths for custom stuff, so
if you are aware of alternate ways of doing this with local paths or
environment variables, I'd appreciate hearing them.

Ash


On Fri, Oct 4, 2013 at 4:45 PM, Ash Qin <ash at exodusviewer.com> wrote:
>> Shouldn't need an environment variable. Xcodebuild is directed to use the system's llvm-gcc
>
> I had tried already without ccache (and a clean build directory). What
> I hadn't tried though was not defining CXX and CC variables to LLVM.
>
> Surprisingly, I am able to compile the viewer now despite the
> deceptive message that autobuild is now using Clang. The confusing
> thing is that I can point the CXX and CC variables to the exact same
> compilers xcode is using and still get the exact same failure.
>
> This sort of behaviour leaves me a little miffed. Being that I would
> really like to use ccache in my work, would you happen to know of a
> way to tell xcode to use ccache + llvm in Second life's compilation
> process?
>
>> (just won't work on Xcode5, which you aren't using anyway, because Apple symlinked "llvm-gcc" to clang. -_-)
>
> So, one could get xcode5 working by just changing the symlink to the
> right compiler?
>
> Thanks,
>    Ash
>
> On Fri, Oct 4, 2013 at 3:55 PM, Cinder Biscuits
> <cinder.roxley at phoenixviewer.com> wrote:
>> On 4 Oct 2013, at 8:32, Ash Qin wrote:
>>
>>>> Did you install Command Line Tools with Xcode and CMake?
>>>
>>> Yes.
>>>
>>>> (from your logs)
>>>> -- The C compiler identification is unknown
>>>> -- The CXX compiler identification is unknown
>>>
>>> That's only because I defined the CC and CXX environment variables to
>>> use LLVM-GCC through ccache using:
>>>
>>> export CXX=/usr/local/opt/ccache/libexec/llvm-g++-4.2
>>> export CC=/usr/local/opt/ccache/libexec/llvm-gcc-4.2
>>>
>>> This is because I am aware that viewer-release will not build under
>>> Clang. If you look in the build log, it uses those compilers fine.
>>> Also, no difference when not using ccache.
>>
>> Shouldn't need an environment variable. Xcodebuild is directed to use
>> the system's llvm-gcc
>> in Variables.cmake (just won't work on Xcode5, which you aren't using
>> anyway, because Apple
>> symlinked "llvm-gcc" to clang. -_-)
>>
>> Seems to me that CMake is confused as to where the C compiler is. You've
>> probably already tried
>> this, but nuke build-darwin-i386 and try again without ccache.
>> Something's likely stale.
>>
>> --
>> Cinder
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