This did it Greg,
Thanks a lot.
On Wednesday, May 21, 2014 2:18:08 AM UTC+9, Greg D wrote:
>
> Yes, the examples in the book are missing some lines. I think the
> following log shows what they were going for:
>
> joy.udp=> (remove-method compiler ::osx)
> joy.udp=> (def unix (into unix {::c-compiler "/usr/bin/gcc"}))
> joy.udp=> (def osx (into osx {:c-compiler "gcc"}))
> oy.udp=> osx
> {:home "/Users", :llvm-compiler "clang", :os :joy.udp/osx,
> :joy.udp/prototype {:home "/home", :os :joy.udp/unix, :c-compiler "cc",
> :dev "/dev"}, :c-compiler "gcc"}
> joy.udp=> unix
> {:home "/home", :joy.udp/c-compiler "/usr/bin/gcc", :os :joy.udp/unix,
> :c-compiler "cc", :dev "/dev"}
> joy.udp=> (compiler osx)
> "gcc"
> joy.udp=> (compile-cmd osx)
> "/usr/bin/gcc"
>
> About your question:
>
>> Isn't there a core function/macro where I can derive and set hierarchy
>> all at once?
>>
> Such a function would need to know in advance what hierarchy you want to
> construct. If you have a desired pattern of hierarchy that you want to
> reuse, you could define a function to create it using "derive" and
> optionally "make-hierarchy".
>
>
> On Monday, May 19, 2014 4:38:00 PM UTC-7, gamma235 wrote:
>>
>> I actually just wanna know why I need to use derive so many times. Isn't
>> there a core function/macro where I can derive and set hierarchy all at
>> once? I'm just looking for a more efficient way. My bad for not stating
>> that more clearly in the original post.
>>
>> The real problem though is the last two calls to compile-cmd. I've been
>> messing with it for a couple of days so any help there would be well
>> appreciated.
>>
>> Thanks
>>
>> J
>>
>>
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