[gdal-dev] Cannot compile 1.10 for iOS due to missing crt_extern

[Even Rouault]

Selon Nik Sands <nixanz at nixanz.com>:

> PS.  I've got a work around for now...
>
> I edited the file "ogr/ogrsf_frmts/vfk/vfkdatablock.cpp" and commented out
> the lines that referenced "clock()", and the debug line which appears to be
> all that was using it.
>
> It then built OK.   :-)
>
> I'm sure you guys can come up with a proper solution, but this did the job
> for me for now.   :-)

Nick,

can you open a ticket in GDAL Trac about those 2 issues ?

Thanks,

Even

>
> Cheers,
> Nik.
>
>
>
> On 13/08/2013, at 10:16 AM, Nik Sands <nixanz at nixanz.com> wrote:
>
> > Hi Even,
> >
> > Your suggestion has helped a little, but I still can't compile for iOS
> (device).  I'm getting the following at the end of the build output...
> >
> >
> > libtool: compile:
>
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/g++
> -arch armv7 -pipe -Os -gdwarf-2 -isysroot
>
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk
> -mno-thumb -mthumb-interwork -Wall
> -I/Users/nsands/Documents/Nik/Development/gdal-1.10.0/port
> -I/Users/nsands/Documents/Nik/Development/gdal-1.10.0/gcore
> -I/Users/nsands/Documents/Nik/Development/gdal-1.10.0/alg
> -I/Users/nsands/Documents/Nik/Development/gdal-1.10.0/ogr
> -I/Users/nsands/Documents/Nik/Development/gdal-1.10.0/ogr/ogrsf_frmts
> -I/Users/nsands/Documents/Nik/Development/gdal-1.10.0/frmts -DOGR_ENABLED
> -I/Users/nsands/Documents/Nik/Development/gdal-1.10.0/port -c commonutils.cpp
> -o commonutils.o
> > /bin/sh /Users/nsands/Documents/Nik/Development/gdal-1.10.0/libtool
>
--mode=link	/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/g++
> -arch armv7 -isysroot
>
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk
> gdalinfo.lo commonutils.lo
> /Users/nsands/Documents/Nik/Development/gdal-1.10.0/libgdal.la -o gdalinfo
> > libtool: link:
>
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/g++
> -arch armv7 -isysroot
>
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk
> gdalinfo.o commonutils.o -o gdalinfo
> /Users/nsands/Documents/Nik/Development/gdal-1.10.0/.libs/libgdal.a -lsqlite3
> -lz -lpthread -ldl -liconv -lxml2
> > Undefined symbols for architecture armv7:
> >  "_clock$UNIX2003", referenced from:
> >      IVFKDataBlock::LoadGeometry()       in libgdal.a(vfkdatablock.o)
> > ld: symbol(s) not found for architecture armv7
> > collect2: ld returned 1 exit status
> > make[1]: *** [gdalinfo] Error 1
> > make: *** [apps-target] Error 2
> >
> >
> > How can I get this resolved?
> >
> > Cheers,
> > Nik.
> >
> >
> > On 12/08/2013, at 4:12 PM, Even Rouault <even.rouault at mines-paris.org>
> wrote:
> >
> >> Le lundi 12 août 2013 02:17:33, Nik Sands a écrit :
> >>> Hi list members,
> >>>
> >>> I was able to build GDAL 1.9 for iOS, and I can build 1.10 for the iOS
> >>> simulator, however I cannot compile GDAL 1.10 for the actual iOS
> >>> (devices).  It appears that this is because crt_extern is not included in
> >>> iOS.
> >>>
> >>> The code that trips up the build is in 'cpl_spawn.cpp' and appears to be:
> >>>
> >>> 	#ifdef __APPLE__
> >>> 	#include <crt_externs.h>
> >>>
> >>> The last few lines of the build output are below.
> >>>
> >>> Is there some way that I can get GDAL 1.10 built for iOS?  I really need
> >>> one of the changes that was included in this version.
> >>>
> >>> Thanks in advance for any advice that you may be able to provide.
> >>
> >> Nick,
> >>
> >> Maybe you can try the patch at
> >> https://github.com/joyent/libuv/pull/321#issuecomment-4155600 that has
> very
> >> similar code that the one in GDAL and report if it works for you so it can
> get
> >> integrated ?
> >>
> >> Even
> >>
> >>>
> >>> Cheers,
> >>> Nik.
> >>>
> >>>
> >>> libtool: compile:
> >>>
> /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Dev
> >>> eloper/usr/bin/g++ -arch armv7 -pipe -Os -gdwarf-2 -isysroot
> >>>
> /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Dev
> >>> eloper/SDKs/iPhoneOS6.1.sdk -mno-thumb -mthumb-interwork -Wall
> >>> -DOGR_ENABLED -I/Users/nsands/Documents/Nik/Development/gdal-1.10.0/port
> >>> -DHAVE_LIBZ -I/usr/include/libxml2 -DHAVE_LIBXML2 -c cpl_spawn.cpp -o
> >>> cpl_spawn.o cpl_spawn.cpp:465:25: error: crt_externs.h: No such file or
> >>> directory cpl_spawn.cpp: In function 'CPLSpawnedProcess*
> CPLSpawnAsync(int
> >>> (*)(CPL_FILE_HANDLE, CPL_FILE_HANDLE), const char* const*, int, int, int,
> >>> char**)': cpl_spawn.cpp:727: error: '_NSGetEnviron' was not declared in
> >>> this scope make[1]: *** [cpl_spawn.lo] Error 1
> >>> make: *** [port-target] Error 2
> >>> _______________________________________________
> >>> gdal-dev mailing list
> >>> gdal-dev at lists.osgeo.org
> >>> http://lists.osgeo.org/mailman/listinfo/gdal-dev
> >>
> >> --
> >> Geospatial professional services
> >> http://even.rouault.free.fr/services.html
> >
> > _______________________________________________
> > gdal-dev mailing list
> > gdal-dev at lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/gdal-dev
>
>