Daniel Morissette wrote:
Now, according to http://trac.osgeo.org/gdal/wiki/LargeFileSupport GDAL/OGR already enables large file support if your OS supports it . Obviously that did not work in this case.
Daniel, The above topic says that GDAL supports reading large files, it doesn't necessarily mean that _LARGEFILE_SOURCE is defined. I *think* I accomplish reading large files on linux by using a particular 64bit API in gdal/port/cpl_vsil_unix_stdio_64.cpp though it is a bit unclear exactly what is getting defined. On my system I see cpl_conf.h contains "#define UNIX_STDIO_64 1" and: /* Define to name of 64bit fopen function */ #define VSI_FOPEN64 fopen64 /* Define to name of 64bit fseek func */ #define VSI_FSEEK64 fseeko64 /* Define to name of 64bit ftell func */ #define VSI_FTELL64 ftello64 /* Define to 1, if you have 64 bit STDIO API */ #define VSI_LARGE_API_SUPPORTED 1 /* Define to 1, if you have LARGEFILE64_SOURCE */ /* #undef VSI_NEED_LARGEFILE64_SOURCE */ /* Define to name of 64bit stat function */ #define VSI_STAT64 stat64 /* Define to name of 64bit stat structure */ #define VSI_STAT64_T stat64 It seems to me if VSIStatL() is being used on linux large inode values shouldn't be a problem. Perhaps I missing something. Or perhaps the MITAB code is using VSIStat() instead? If so, perhaps it would suffice to upgrade it to use VSIStatL()?
Question to Frank and other devs: Is it that a specific configure option has to be used to enable large file support, or that the MITAB source MUST be updated to use VSIL* calls everywhere? (I fear it's the latter, but I thought I'd take a chance anyway)
I think it is the latter. You should upgrade to use VSI*L everywhere in MITAB. This may also be important to allow access to mapinfo files in non-traditional file systems (like /vsimem/, and the newly popular /vsicurl/). Best regards, -- ---------------------------------------+-------------------------------------- I set the clouds in motion - turn up | Frank Warmerdam, warmer...@pobox.com light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush | Geospatial Programmer for Rent _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
