examples fail to build: fatal error: 'dart/external/ikfast/ikfast.h' file not found

[yurivict]

examples is a standalone cmake project. dartsim-6.9.5 is installed ()

[ 31%] Building CXX object wam_ikfast/ikfast/CMakeFiles/wamIk.dir/ikfast71.Transform6D.4_6_9_10_11_12_f8.cpp.o
/usr/ports/misc/dartsim/work/dart-6.9.5/examples/wam_ikfast/ikfast/ikfast71.Transform6D.4_6_9_10_11_12_f8.cpp:21:10: fatal error: 'dart/external/ikfast/ikfast.h' file not found
#include "dart/external/ikfast/ikfast.h" // found inside share/openrave-X.Y/python/ikfast.h
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The header is installed:

$ ls -l /usr/local/include/dart/external/ikfast/ikfast.h
-rw-r--r--  1 root  wheel  13529 Oct 17 14:51 /usr/local/include/dart/external/ikfast/ikfast.h

After this is fixed the link error ocurrs:

[ 37%] Linking CXX shared library ../../libwamIk.so
ld: error: unable to find library -ldart

examples should discover dart either through cmake or through pkg-config scripts, but it doesn't.