Thank you, still learning my way around things.
So after copying 90% of the my not working source code into the test
program and it worked there, it finally dawned on me to check the
Makefile. Duh! while I had removed all the shapelib calls from the
source code, I forgot to check the link line to remove adding -lshp
which apparently was causing the bogus behavior. Cleaned that up and
things started working as expected.
Thanks for all the help guys. It is very much appreciated.
-Steve
On 9/3/2010 2:20 PM, Even Rouault wrote:
Stephen
did you read :
http://gdal.org/ogr/ogr__api_8h.html#7b67ea4ab5892c6720460dc7f66eca2d ?
You'll know the cause of the crash afterwards ;-)
Le vendredi 03 septembre 2010 20:12:51, Stephen Woodbridge a écrit :
Even,
Here is my test program:
$ cat testogr.c
#include "ogr_api.h"
int main() {
OGRDataSourceH hDSin;
OGRLayerH hLayerIn;
OGRFeatureDefnH hFDefnIn;
OGRwkbGeometryType layerGeomType;
OGRRegisterAll();
hDSin = OGROpen( "/u/data/routeloops-v2/25/25017/Streets.shp",
FALSE, NULL );
hLayerIn = OGR_DS_GetLayerByName( hDSin, "Streets" );
hFDefnIn = OGR_L_GetLayerDefn( hLayerIn );
layerGeomType = OGR_FD_GetGeomType( hFDefnIn );
printf("GeometryType: %s\n", OGRGeometryTypeToName( layerGeomType ));
OGR_FD_Release( hFDefnIn );
OGR_DS_Destroy( hDSin );
}
$ gcc -g -o testogr testogr.c -I/usr/local/include/gdal -lgdal -lm
It reports GeometryType correctly and then segvs :(
wood...@mappy:~/work$ gdb ./testogr
GNU gdb 6.8-debian
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu"...
(gdb) run
Starting program: /home/woodbri/work/testogr
[Thread debugging using libthread_db enabled]
warning: Lowest section in /usr/lib/libicudata.so.38 is .hash at
0000000000000120
GeometryType: Line String
[New Thread 0x7f361a0bc710 (LWP 30585)]
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7f361a0bc710 (LWP 30585)]
0x0000000000000031 in ?? ()
(gdb) bt
#0 0x0000000000000031 in ?? ()
#1 0x00007f3619a2f190 in ~OGRShapeLayer (this=0x605a40)
at ogrshapelayer.cpp:105
#2 0x00007f3619a2c63f in ~OGRShapeDataSource (this=0x604330)
at ogrshapedatasource.cpp:62
#3 0x0000000000400958 in main () at testogr.c:19
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