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

[Nik Sands]

No problem.  I've now logged these issues in GDAL Trac as two separate tickets (not sure if they should be in one ticket or two?):

	Ticket #5197
	Ticket #5198


On 13/08/2013, at 4:06 PM, Even Rouault <even.rouault at mines-paris.org> wrote:

> 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
>>> 
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>> 
>> 
> 
>