It didn't. That is why I asked.
Thank you.
On Aug 6, 2011, at 1:31 AM, Marcus Karlsson wrote:
--On July 31, 2011 4:49:34 PM -0700 JongAm Park <jongamp...@sbcglobal.net
> wrote:
Hello,
Because gcc now supports OpenMP, we can use pragmas for OpenMP
without
doing any special steps except for setting "Enable OpenMP" and "-
fopenmp".
However, when I tried to use OpenMP functions like :
int omp_get_max_threads(void)
omp.h should be included.
However the location of omp.h is not /usr/inlcude, /usr/local/
include (
if any ) etc. It was under
/usr/lib/gcc/i686-apple-darwin10/4.2.1/include/omp.h
/usr/lib/gcc/powerpc-apple-darwin10/4.2.1/include/omp.h
/usr/llvm-gcc-4.2/lib/gcc/i686-apple-darwin10/4.2.1/include/omp.h
However, as you can see, they are under /usr/lib.
It means that Apple or GCC people wanted to hide the include
directory ,
i.e. lib/gcc/i686-apple-darwin10/4.2.1/include for example, under a
specific compiler's folder under /usr/lib.
So, although it would be possible to set a header path, but to make
the
compiler choose appropriate one ( as you can see, those three are for
different gcc versions, intel, powerpc and llvm-gcc ), I believe
there
should be some mechanism to include them in "directory-path-free"
way.
Is there any such way to include the omp.h?
Or should their include path set just like other header path?
The reason why the header file is located in a per-compiler
directory is that OpenMP has to be implemented by the compiler
itself. That way, omp.h may change from compiler to compiler. It
will also assure that an error is generated if OpenMP is not
supported.
In general you shouldn't have to deal with where exactly the file is
located. Just include <omp.h> and give the compiler the -fopenmp
option. In Xcode setting "Enable OpenMP Support" should be
sufficient. The compiler will find the correct header file.
Marcus
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