Hi GDAL devs,
I’ve built GDAL 3.5 for iOS (device and simulator) but I’ve found that when
incorporating libgdal into my iOS app, there are several errors related to
undefined symbols, all of which are XML related.
My guess is that the libexpat included in Apple’s SDK is missing some symbols
that GDAL requires, therefore I’ve now built my own libexpat.
Now I’m attempting to rebuild GDAL using my own libexpat, using the cmake
configuration command:
==========
cmake -DCMAKE_TOOLCHAIN_FILE=$CMTOOLCHAIN \
-DPLATFORM=$OS \
-DENABLE_BITCODE=OFF \
-DCMAKE_INSTALL_PREFIX=$PREFIX \
-DBUILD_APPS=OFF \
-DBUILD_SHARED_LIBS=OFF \
-DBUILD_PYTHON_BINDINGS=OFF \
-DPROJ_ROOT=$PREFIX \
-DEXPAT_INCLUDE_DIR=$PREFIX/include \
-DEXPAT_LIBRARY=$PREFIX/lib/libexpat.dylib \
-DSQLITE3_INCLUDE_DIR=$PREFIX/include \
-DSQLITE3_LIBRARY=$PREFIX/lib/libsqlite3.a \
-DIconv_INCLUDE_DIR=$SDKPATH/usr \
-DIconv_LIBRARY=$SDKPATH/usr/lib/libiconv.tbd \
-DCMAKE_BUILD_TYPE=Release \
..
==========
However, when this completes, it tells me that it has ignored the two libexpat
arguments that I supplied to it:
==========
-- Configuring done
-- Generating done
CMake Warning:
Manually-specified variables were not used by the project:
EXPAT_INCLUDE_DIR
EXPAT_LIBRARY
-- Build files have been written to: ...
==========
Why would it be ignoring these arguments and how can I get it to use my own
libexpat instead of the default SDK libexpat?
Cheers,
Nik.
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