Environment:Windows. Viewer version 18.104.22.168
In the past I used a command similar to the one below to point to needed FmodEX files.
autobuild configure -c ReleaseOS -A 64 --verbose – -DPACKAGE:BOOL=OFF -DLL_TESTS:BOOL=OFF -DFMODSTUDIO:BOOL=TRUE -DFMODSTUDIO_LIBRARY:PATH=E:\FmodStudio\api\core\lib\x64\fmod_vc.lib -DFMODSTUDIO_INCLUDE_DIR:PATH=E:\FmodStudio\api\core\inc
The command above points to where needed include files are located yet when compiling fmod.hpp and fmod_errors.h are not located. A temporary workaround is to manually create \packages\fmodstudio\include and copy them into that folder.
The correct fix is to remove references in files in llaudio which refer to "\fmodstudio" and also possibly add near line 13 of FmodStudio.cmake