memalign not defined in Mac OS X?

Question

I'm interested if anyone has managed to port HCRF2 to Mac OS X. I get stuck when building a cpp file using malloc.h. Apparently this is a deprecated package and there's not a whole lot out there telling you how to port programs using it. Any help would be greatly appreciated as I am not a C++ man.

[  2%] Building CXX object hCRF/CMakeFiles/hCRF.dir/src/matrixSSE2.cpp.o
/Volumes/LocalScratchHD/LocalHome/savkov/Software/HCRF2.0b/libs/shared/hCRF/src/matrixSSE2.cpp:9:10: error: 'malloc.h' file not found with <angled> include; use "quotes" instead
#include <malloc.h>
     ^~~~~~~~~~
     "malloc.h"
/Volumes/LocalScratchHD/LocalHome/savkov/Software/HCRF2.0b/libs/shared/hCRF/src/matrixSSE2.cpp:89:20: error: use of undeclared identifier 'memalign'
            pData = (double*)memalign(16, size*sizeof(double));
                             ^
2 errors generated.
make[2]: *** [hCRF/CMakeFiles/hCRF.dir/src/matrixSSE2.cpp.o] Error 1
make[1]: *** [hCRF/CMakeFiles/hCRF.dir/all] Error 2
make: *** [all] Error 2

UPDATE:

I copied malloc.h into the source folder and things went a bit further. Now I get another error:

/.../HCRF2.0b/libs/shared/hCRF/src/matrixSSE2.cpp: In member function 'void Matrix<elType>::create(int, int, elType) [with elType = double]':
/.../HCRF2.0b/libs/shared/hCRF/src/matrixSSE2.cpp:89:52: error: 'memalign' was not declared in this scope

What toolchain are you using to compile this? `#include ` should work everywhere (within reason). — trojanfoe, Jan 10 '14 at 16:42
I use cmake to prepare the make files and then make if that's what you're asking. — Aleksandar Savkov, Jan 10 '14 at 16:46
No, I want to know the compiler you are using. Is it the Xcode command line tools? — trojanfoe, Jan 11 '14 at 09:53
Initially the system was set to use Xcode (gcc4.2), then I tried setting the compiler manually to gcc4.8 when starting cmake. Both didn't work. — Aleksandar Savkov, Jan 12 '14 at 17:24

score 4 · Answer 1 · answered Apr 05 '14 at 05:00

OSX lacks memalign(), but it does have posix_memalign(). It has a different signature than memalign(), so you'll have to tweak the sources a bit. Where you have:

pData = (double*)memalign(16, size*sizeof(double));

you can re-write that as (untested):

err = posix_memalign((void **)&pData, 16, size*sizeof(double));

But I believe that OSX always allocates on 16 byte boundaries. If this is the case, you can just as easily use malloc():

pData = (double *)malloc(size*sizeof(double));

(If you go this route, it would be wise to include an assertion that verifies pData to be on a 16 byte boundary.)

memalign not defined in Mac OS X?

1 Answers1