While libmesh builds fine on OSX 10.9 with a hand-built GCC, apparently the
same cannot be said for a hand-built clang (or maybe any clang?). We
specifically tried the following one (since it includes OpenMP support)
$ clang++ --version
> clang version 3.3.1
> (https://github.com/clang-omp/clang47e909e53fa2eef93a2d14fc46d326c2ac18e44d) (
> https://github.com/clang-omp/llvmb488751c4fd745867e44dedb160c480bd37b3dc9)
>
and it produces the following error while building netcdf:
> In file included from ../../../../../contrib/netcdf/v4/ncgen3/load.c:14:
> ../../../../../contrib/netcdf/v4/ncgen3/genlib.h:84:15: error: expected
> parameter declarator
> extern size_t strlcat(char *dst, const char *src, size_t siz);
> ^
> /usr/include/secure/_string.h:111:44: note: expanded from macro 'strlcat'
> __builtin___strlcat_chk (dest, src, len, __darwin_obsz (dest))
> ^
> /usr/include/secure/_common.h:39:62: note: expanded from macro
> '__darwin_obsz'
> #define __darwin_obsz(object) __builtin_object_size (object,
> _USE_FORTIFY_LEVEL > 1 ? 1 : 0)
> ^
> /usr/include/secure/_common.h:30:32: note: expanded from macro
> '_USE_FORTIFY_LEVEL'
> # define _USE_FORTIFY_LEVEL 2
> ^
I've seen a couple of other threads [0,1] which report basically the same
problem on clang/OSX 10.9. The latter eventually ended in a patch that
added -fno-builtin to the list of compiler flags to work around the
problem. I tried that, but it didn't seem to fix the issue. I don't know
what the right solution is, and it's kind of important because apparently
/usr/bin/gcc is _actually clang_ on Mavericks:
$ /usr/bin/gcc --version
> Configured with: --prefix=/Library/Developer/CommandLineTools/usr
> --with-gxx-include-dir=/usr/include/c++/4.2.1
> Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn)
> Target: x86_64-apple-darwin13.0.0
> Thread model: posix
And, although I haven't tried installing it yet, GCC is supposedly not part
of Xcode 5.0 either [2].
[0] https://github.com/Homebrew/homebrew-science/issues/369
[1] https://code.google.com/p/go/issues/detail?id=6506
[2]
http://stackoverflow.com/questions/19061966/how-to-use-a-recent-gcc-with-xcode-5
--
John
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