[Gdal-dev] MinGW & GDAL: "[Linker error] undefined reference..."

[Mario Beauchamp]

Hi Jochen,

On Mon, 26 Jul 2004 01:59:32 +0200, Jochen Krüger <kruegerj at gmx.de> wrote:

>Similar error messages are given for any instance where I use one of the 
>libraries instructions. I have configured the paths to the includes and 
>the library in Dev-C++ correctly, so I must assume that it's something 
>with the library I'm using or with the way I'm using it...

I used Dev-C++ to build the gda/ogr apps based on the following makefile:

# Project: gdal-ogr_apps
# Makefile created by Dev-C++ 4.9.8.7

CPP  = g++.exe
CC   = gcc.exe
WINDRES = windres.exe
RES  = 
OBJ  = ogr/ogrtindex.o $(RES)
LINKOBJ  = ogr/ogrtindex.o $(RES)
LIBS =  -L/local/bin -lgdal12 
INCS = 
CXXINCS = 
BIN  = ogrtindex.exe
CXXFLAGS = $(CXXINCS)-I./port -I./gcore -I./ogr -I./frmts -I./alg -I./ogr/ogrsf_frmts   -w -O2
CFLAGS = $(INCS)-I./port -I./gcore -I./ogr -I./frmts -I./alg -I./ogr/ogrsf_frmts   -w -O2

.PHONY: all all-before all-after clean clean-custom

all: all-before ogrtindex.exe all-after


clean: clean-custom
	rm -f $(OBJ) $(BIN)

$(BIN): $(OBJ)
	$(CPP) $(LINKOBJ) -o "ogrtindex.exe" $(LIBS)

ogr/ogrtindex.o: ogr/ogrtindex.cpp
	$(CPP) -c ogr/ogrtindex.cpp -o ogr/ogrtindex.o $(CXXFLAGS)

This assumes that the makefile is at the top of the GDAL building tree. Also note the "LIBS" line:
it means that we link directly with the gdal12.dll in /local/bin.

>int main(int argc, char *argv[])
>{
>...
>   GDALAllRegister();
>   const char* pan_infile=argv[1];
>   // Open Pan
>   panDataset = (GDALDataset *) GDALOpen( pan_infile, GA_ReadOnly );
>   if( panDataset == NULL ) {
>     cout << endl << "Pan-Input kann nicht geoeffnet werden!" << endl;
>     errorvalue=2;

May I ask what you're trying to do? I see you open a "panDataset": is it for a fusion with an RGB
dataset?

Hope this helps.
--
Mario B.
My Landsat images:
http://pages.infinit.net/starged/landsat/home.html