Re: Clang!

[Richard Campbell]

On Feb 1, 2011, at 7:12 PM, Richard Campbell wrote:

> 
> On Feb 1, 2011, at 7:09 PM, Ben Abbott wrote:
> 
>> On Feb 1, 2011, at 12:36 PM, Richard Campbell wrote:
>> 
>>> octave:2> octave_config_info.CC
>>> ans = clang
>>> octave:3> octave_config_info.CXX
>>> ans = llvm-g++
>>> octave:4> octave_config_info.FC
>>> ans = gfortran
>>> octave:5> octave_config_info.config_opts
>>> ans = '--disable-docs' '--with-blas=-lBLASWRAP' 'CC=clang' 'CFLAGS=-arch 
>>> x86_64' 'LDFLAGS=-arch x86_64' 'CPPFLAGS=-arch x86_64 -D_REENTRANT' 
>>> 'CXX=llvm-g++' 'FFLAGS=-arch x86_64'
>>> 
>>> It works! I also tried it with CXX="clang" but it gave a bunch of warnings 
>>> and then hung during the build. From what I gather, c++ support from Clang 
>>> is still highly experimental, although six months ago it was completely 
>>> nonexistent. LLVM is working beautifully though. I might try with 
>>> llvm-gfortran as well.
>>> 
>>> Campbell
>> 
>> Is there a llvm-gfortan for MacOS?
>> 
>> Ben
>> 
> 
> 
> Not from Apple, but macresearch.org has one. I haven't tried anything from 
> them yet.
> 
> Campbell

Did I mention it builds significantly faster?

With clang and llvm-g++, both from Apple:
 
time make -j 24
...
real 3m9.225s
user 46m20.673s
sys 5m45.742s

With gcc and g++, both from Apple:

time make -j 24
...
real 5m1.606s
user 64m43.338s
sys 5m54.598s