Hi all,
I managed to get the GDAL library with ECW support to compile and link for
32-bit, but realized I need to get the 64-bit library working. I'm having
linking issues with this.
I'm running Windows 10, VS2015 command line tools, and trying to build GDAL
2.1.3 with support for ERDAS ECW 5.3. The relevant (I believe) parts of my
nmake.opt file are;
WIN64=YES
# Uncomment the following and update to enable ECW read support with the
# 4.1+ readonly SDK
ECWDIR = ...\Hexagon\ERDAS_ECW_JPEG_2000_SDK_53
ECWFLAGS = -DECWSDK_VERSION=53 \
-I$(ECWDIR)\include \
-I$(ECWDIR)\include/NCSECW/api -I$(ECWDIR)\include/NCSECW/jp2 \
-I$(ECWDIR)\include/NCSECW/ecw
ECWLIB = $(ECWDIR)\lib\vc110\x64\NCSEcw.lib
SYM_PREFIX=
(I've tried SYM_PREFIX=_) as well.
The output I get is;
Generating Code...
cd ..
if exist gdal.lib del gdal.lib
lib /nologo /out:gdal.lib port\*.obj gcore\*.obj alg\*.obj
frmts\o\*.obj ogr\ogrsf_frmts\ogrsf_frmts.lib ogr\ogr.lib gnm\*.obj
gnm\gnm_frmts\o\*.obj apps\commonutils.obj apps\gdalinfo_lib.obj
apps\gdal_translate_lib.obj apps\gdalwarp_lib.obj apps\ogr2ogr_lib.obj
apps\gdaldem_lib.obj apps\nearblack_lib.obj apps\gdal_grid_lib.obj
apps\gdal_rasterize_lib.obj apps\gdalbuildvrt_lib.obj
ogrsf_frmts.lib(ogrjmllayer.obj) : warning LNK4221: This object file does not
define any previously undefined public symbols, so it will not be used by any
link operation that consumes this library
ogr.lib(ograpispy.obj) : warning LNK4221: This object file does not define any
previously undefined public symbols, so it will not be used by any link
operation that consumes this library
nitf_gcprpc.obj : warning LNK4221: This object file does not define any
previously undefined public symbols, so it will not be used by any link
operation that consumes this library
ecwcreatecopy.obj : warning LNK4221: This object file does not define any
previously undefined public symbols, so it will not be used by any link
operation that consumes this library
cpl_recode_iconv.obj : warning LNK4221: This object file does not define any
previously undefined public symbols, so it will not be used by any link
operation that consumes this library
link /nologo /dll /INCLUDE:OSRValidate
/INCLUDE:OPTGetProjectionMethods /INCLUDE:OGR_G_GetPointCount
/INCLUDE:OGRRegisterAll /INCLUDE:GDALSimpleImageWarp
/INCLUDE:GDALReprojectImage /INCLUDE:GDALComputeMedianCutPCT
/INCLUDE:GDALDitherRGB2PCT /INCLUDE:OCTNewCoordinateTransformation port\*.obj
gcore\*.obj alg\*.obj frmts\o\*.obj ogr\ogrsf_frmts\ogrsf_frmts.lib ogr\ogr.lib
gnm\*.obj gnm\gnm_frmts\o\*.obj apps\commonutils.obj apps\gdalinfo_lib.obj
apps\gdal_translate_lib.obj apps\gdalwarp_lib.obj apps\ogr2ogr_lib.obj
apps\gdaldem_lib.obj apps\nearblack_lib.obj apps\gdal_grid_lib.obj
apps\gdal_rasterize_lib.obj apps\gdalbuildvrt_lib.obj
D:\Users\LCandy\AppData\Local\Hexagon\ERDAS_ECW_JPEG_2000_SDK_53\lib\vc110\x64\NCSEcw.lib
gcore\Version.res
/out:gdal201.dll /implib:gdal_i.lib
Creating library gdal_i.lib and object gdal_i.exp
LINK : error LNK2001: unresolved external symbol OSRValidate
LINK : error LNK2001: unresolved external symbol OPTGetProjectionMethods
LINK : error LNK2001: unresolved external symbol OGR_G_GetPointCount
LINK : error LNK2001: unresolved external symbol OGRRegisterAll
LINK : error LNK2001: unresolved external symbol GDALSimpleImageWarp
LINK : error LNK2001: unresolved external symbol GDALReprojectImage
LINK : error LNK2001: unresolved external symbol GDALComputeMedianCutPCT
LINK : error LNK2001: unresolved external symbol GDALDitherRGB2PCT
LINK : error LNK2001: unresolved external symbol OCTNewCoordinateTransformation
Followed by a string of 'unresolved external symbol' errors.
And, to confirm that I'm using the 64-bit compiler / linker from VS, the final
line of the output is:
gdal201.dll : fatal error LNK1120: 247 unresolved externals
NMAKE : fatal error U1077: '"D:\Program Files (x86)\Microsoft Visual Studio
14.0\VC\BIN\amd64_x86\link.EXE"' : return code '0x460'
Stop.
I've been struggling with this for two days, so any help at all would be
greatly appreciated.
Best regards,
Liam.
Liam Candy D +27 11 638 2078 M +27 11 282 8658 Ext 8113 2078
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