Rocky apps build fails: gdal unresolved symbols

[GaussGun3000]

I am using gdal 3.11 to link with rocky. Worked fine on other devices, but on my particular ubuntu22 I get this, right when the apps start to build (rocky library itself seems to build without issues):

[ 98%] Linking CXX executable rocky_simple
/usr/bin/ld: ../../rocky/librocky.so.51: undefined reference to GDALDataset::GetRasterCount()' /usr/bin/ld: ../../rocky/librocky.so.51: undefined reference to GDALRasterBand::GetYSize()'
/usr/bin/ld: ../../rocky/librocky.so.51: undefined reference to GDALRasterBand::GetRasterDataType()' /usr/bin/ld: ../../rocky/librocky.so.51: undefined reference to GDALDataset::GetRasterYSize()'
/usr/bin/ld: ../../rocky/librocky.so.51: undefined reference to GDALRasterBand::GetXSize()' /usr/bin/ld: ../../rocky/librocky.so.51: undefined reference to GDALRasterBand::GetBlockSize(int*, int*)'
/usr/bin/ld: ../../rocky/librocky.so.51: undefined reference to GDALRasterBand::GetActualBlockSize(int, int, int*, int*)' /usr/bin/ld: ../../rocky/librocky.so.51: undefined reference to GDALDataset::GetRasterXSize()'
collect2: error: ld returned 1 exit status
make[2]: *** [src/apps/rocky_simple/CMakeFiles/rocky_simple.dir/build.make:122: src/apps/rocky_simple/rocky_simple] Error 1
make[1]: *** [CMakeFiles/Makefile2:208: src/apps/rocky_simple/CMakeFiles/rocky_simple.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
[ 99%] Linking CXX executable rocky_tests
/usr/bin/ld: ../rocky/librocky.so.51: undefined reference to GDALDataset::GetRasterCount()' /usr/bin/ld: ../rocky/librocky.so.51: undefined reference to GDALRasterBand::GetYSize()'
/usr/bin/ld: ../rocky/librocky.so.51: undefined reference to GDALRasterBand::GetRasterDataType()' /usr/bin/ld: ../rocky/librocky.so.51: undefined reference to GDALDataset::GetRasterYSize()'
/usr/bin/ld: ../rocky/librocky.so.51: undefined reference to GDALRasterBand::GetXSize()' /usr/bin/ld: ../rocky/librocky.so.51: undefined reference to GDALRasterBand::GetBlockSize(int*, int*)'
/usr/bin/ld: ../rocky/librocky.so.51: undefined reference to GDALRasterBand::GetActualBlockSize(int, int, int*, int*)' /usr/bin/ld: ../rocky/librocky.so.51: undefined reference to GDALDataset::GetRasterXSize()'
collect2: error: ld returned 1 exit status
make[2]: *** [src/tests/CMakeFiles/rocky_tests.dir/build.make:108: src/tests/rocky_tests] Error 1
make[1]: *** [CMakeFiles/Makefile2:260: src/tests/CMakeFiles/rocky_tests.dir/all] Error 2
[100%] Linking CXX executable rocky_demo
/usr/bin/ld: ../../rocky/librocky.so.51: undefined reference to GDALDataset::GetRasterCount()' /usr/bin/ld: ../../rocky/librocky.so.51: undefined reference to GDALRasterBand::GetYSize()'
/usr/bin/ld: ../../rocky/librocky.so.51: undefined reference to GDALRasterBand::GetRasterDataType()' /usr/bin/ld: ../../rocky/librocky.so.51: undefined reference to GDALDataset::GetRasterYSize()'
/usr/bin/ld: ../../rocky/librocky.so.51: undefined reference to GDALRasterBand::GetXSize()' /usr/bin/ld: ../../rocky/librocky.so.51: undefined reference to GDALRasterBand::GetBlockSize(int*, int*)'
/usr/bin/ld: ../../rocky/librocky.so.51: undefined reference to GDALRasterBand::GetActualBlockSize(int, int, int*, int*)' /usr/bin/ld: ../../rocky/librocky.so.51: undefined reference to GDALDataset::GetRasterXSize()'

tried looking for stale old gdal, cleaned it (even though it hadn't caused any issues before), but still getting this error.

[gwaldron]

I do not know. Perhaps something to do with linker argument ordering?
https://stackoverflow.com/questions/74612412/g-failing-when-trying-to-use-gdal-library

[GaussGun3000]

Nope. Wasn't it. Found the culprit though - it was newer vsgXchange that picked up older gdal and was affecting rocky build. I believe that is because earlier vsgXchange did not depend on gdal at all. I build VSG and rocky (including newer gdal) separately from each other, did not discover any issues with VSG build and proceeded to search only on rocky side. All good now

[gwaldron]

Ah good find. I generally pull in vsgXchange from vcpkg without the optional gdal support.
Thanks!