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Subject: Re: gdal on amd64 needs -fPIC? - msg#00231List: gis.gdal.develMore info: both netcdf/hdf and gdal need -fPIC. I tried compiling gdal with -fPIC while having hdf4 compiled without, and that didn't work out. Might be that gdal when compiled without hdf4 support doesn't need -fPIC, but as I need hdf4 support I didn't try that yet. Vincent, The -fPIC causes object files to be produced using Position Independent Code. Basically, all jump instructions are relative instead of absolute jumps. This isn't normally an issue on Intel, but is required for shared libraries on Space and several other platforms. I'm not sure why it is required for AMD 64bit; however, given that it is I am surprised that libtool doesn't already take care of it. In non-libtool builds we automatically try and add -fPIC and use it if it doesn't cause a problem. Alessandro, do we need to update our libtool to address this? Best regards, -- ---------------------------------------+-------------------------------------- I set the clouds in motion - turn up | Frank Warmerdam, warmerdam@xxxxxxxxx light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush | Geospatial Programmer for Rent Thread at a glance:
Previous Message by Date: click to view message previewRe: gdal on amd64 needs -fPIC?More info: both netcdf/hdf and gdal need -fPIC. I tried compiling gdal with -fPIC while having hdf4 compiled without, and that didn't work out. Might be that gdal when compiled without hdf4 support doesn't need -fPIC, but as I need hdf4 support I didn't try that yet. Vincent. On Tuesday 30 March 2004 12:50, Vincent Schut wrote: > I just tried to compile gdal on my new amd64. It complained about needing > -fPIC in the final install phase (where all libs are archived together into > one I think). After I recompiled netcdf and hdf4 with -fPIC, I tried to > compile gdal with -fPIC and then it compiled fine. To do this, I both > changed GDALmake.opt and libtool. > I will investigate some more, e.g. do only hdf/netcdf need -fPIC or also > GDAL (this seemed to be the case, but I'm not yet sure). > Does it sound likely that gdal needs -fPIC on amd64? I really need to check > out what this -fPIC thing does... > Frank and other developers, your comments please...? > If you need some amd64 testing, please inform me. > > Cheers, -- ----------------------------- Vincent Schut SarVision B.V. Wageningen, The Netherlands www.sarvision.com Next Message by Date: click to view message previewRe: GDAL_INCLUDE needs -I$(GDAL_ROOT)/alg for usgsdem formatVincent Schut wrote: Appears that in GDALmake.opt GDAL_INCLUDE needs -I$(GDAL_ROOT)/alg for usgsdem format, because it wants to include gdalwarper.h which is in gcore/alg. Vincent, Fixed in CVS. Sorry about that. Best regards, -- ---------------------------------------+-------------------------------------- I set the clouds in motion - turn up | Frank Warmerdam, warmerdam@xxxxxxxxx light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush | Geospatial Programmer for Rent Previous Message by Thread: click to view message previewRe: gdal on amd64 needs -fPIC?More info: both netcdf/hdf and gdal need -fPIC. I tried compiling gdal with -fPIC while having hdf4 compiled without, and that didn't work out. Might be that gdal when compiled without hdf4 support doesn't need -fPIC, but as I need hdf4 support I didn't try that yet. Vincent. On Tuesday 30 March 2004 12:50, Vincent Schut wrote: > I just tried to compile gdal on my new amd64. It complained about needing > -fPIC in the final install phase (where all libs are archived together into > one I think). After I recompiled netcdf and hdf4 with -fPIC, I tried to > compile gdal with -fPIC and then it compiled fine. To do this, I both > changed GDALmake.opt and libtool. > I will investigate some more, e.g. do only hdf/netcdf need -fPIC or also > GDAL (this seemed to be the case, but I'm not yet sure). > Does it sound likely that gdal needs -fPIC on amd64? I really need to check > out what this -fPIC thing does... > Frank and other developers, your comments please...? > If you need some amd64 testing, please inform me. > > Cheers, -- ----------------------------- Vincent Schut SarVision B.V. Wageningen, The Netherlands www.sarvision.com Next Message by Thread: click to view message previewRe: gdal on amd64 needs -fPIC?Frank, > I'm not sure why it is > required for AMD 64bit; however, given that it is I am surprised that > libtool doesn't already take care of it. > > In non-libtool builds we automatically try and add -fPIC and use it if it > doesn't cause a problem. > > Alessandro, do we need to update our libtool to address this? i'll have a look, however grep x86.64 says that at least some support is already present in the version of libtool in cvs (and released). cheers, alessandro Loading Comments...
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