see https://gitlab.com/flightgear/flightgear/-/work_items/3527
Fix missing transitive GDAL include directory
from /var/tmp/portage/games-simulation/flightgear-2024.1.7/work/flightgear-2024.1.7/src/Airports/groundnetwork.cxx:26:
/usr/include/simgear/scene/dem/SGDemTile.hxx:4:10: fatal error: gdal.h: No such file or directory
    4 | #include <gdal.h>                                           
      |          ^~~~~~~~  
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -601,6 +601,8 @@ add_dependencies(fgfsObjects buildId)
 # remove once we use CMake 3.12, since then the dependency will be explicit
 add_dependencies(fgfsObjects fgembeddedresources)
 
+# For transitive GDAL::GDAL usage requirements
+target_link_libraries(fgfsObjects PRIVATE SimGearScene)
 ########################################################################
 
 add_subdirectory(3rdparty)