Dear all,
I need to support both hdf5 and tiff files in the same program, and I
observed a conflict in hdf5 and ImageMagick include files on Windows 7,
when compiling with VC10 for 32-bit architecture.
In this case, H5public.h defines "typedef int ssize_t;" whereas
magick-config.h defines "typedef long ssize_t;". Indeed both "int" and
"long" are 4-byte variables, but anyway the compiler complaints that there
is a type redefinition with the wrong data type.
You can observe it even with a stupid "hello world" program, just
including the two lines:
#include <hdf5.h>
#include <wand/MagickWand.h>
A possible patch: I changed in H5public.h the ssize_t definition from
/* Define the ssize_t type if it not is defined */
#if H5_SIZEOF_SSIZE_T==0
/* Undefine this size, we will re-define it in one of the sections below
*/
#undef H5_SIZEOF_SSIZE_T
#if H5_SIZEOF_SIZE_T==H5_SIZEOF_INT
typedef int ssize_t;
# define H5_SIZEOF_SSIZE_T H5_SIZEOF_INT
#elif H5_SIZEOF_SIZE_T==H5_SIZEOF_LONG
typedef long ssize_t;
# define H5_SIZEOF_SSIZE_T H5_SIZEOF_LONG
#elif H5_SIZEOF_SIZE_T==H5_SIZEOF_LONG_LONG
typedef long long ssize_t;
# define H5_SIZEOF_SSIZE_T H5_SIZEOF_LONG_LONG
#else /* Can't find matching type for ssize_t */
# error "nothing appropriate for ssize_t"
#endif
#endif
to
/* Define the ssize_t type if it not is defined */
#if H5_SIZEOF_SSIZE_T==0
/* Undefine this size, we will re-define it in one of the sections below
*/
#undef H5_SIZEOF_SSIZE_T
#if H5_SIZEOF_SIZE_T==H5_SIZEOF_LONG_LONG
typedef long long ssize_t;
# define H5_SIZEOF_SSIZE_T H5_SIZEOF_LONG_LONG
#elif H5_SIZEOF_SIZE_T==H5_SIZEOF_LONG
typedef long ssize_t;
# define H5_SIZEOF_SSIZE_T H5_SIZEOF_LONG
#elif H5_SIZEOF_SIZE_T==H5_SIZEOF_INT
typedef int ssize_t;
# define H5_SIZEOF_SSIZE_T H5_SIZEOF_INT
#else /* Can't find matching type for ssize_t */
# error "nothing appropriate for ssize_t"
#endif
#endif
(ie just inverting the order from INT - LONG - LONG LONG to LONG LONG -
LONG - INT.)
In this way ssize_t is of type long and there is no conflict with
ImageMagick. And I think there is no real change in HDF5 too, since
sizeof(int)==sizeof(long).
First of all: did anybody ever observe any problem of this kind?
Second question: are there comments to the patch?
Regards,
Andrea
------------------------------------------------------------
Dr. Andrea Parenti DESY (FS-EC Group)
mail: [email protected] Notkestrasse 85
web: http://www.desy.de/~parenti/ D-22607 Hamburg
phone: +49 (0)40 8998 3154 Germany
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