Appreciate if somebody can help out with this error:

$ scons

scons: Reading SConscript files ...

scons: done reading SConscript files.

scons: Building targets ...

Compiling Build/EffSource/ScalarSchwarzschild/EffectiveSource/EffectiveSource-acceleration.o

Src/EffSource/ScalarSchwarzschild/EffectiveSource/EffectiveSource-acceleration.cc:16:10: fatal error: gsl/gsl_sf_ellint.h: No such file or directory

   16 | #include <gsl/gsl_sf_ellint.h>

      |          ^~~~~~~~~~~~~~~~~~~~~

compilation terminated.

scons: *** [Build/EffSource/ScalarSchwarzschild/EffectiveSource/EffectiveSource-acceleration.o] Error 1

scons: building terminated because of errors.

the gsl library is already installed in my mac. I installed it both using MacPorts and brew

$ ls /usr/local/Cellar/gsl/2.7/lib/

libgsl.25.dylib libgsl.a libgsl.dylib libgslcblas.0.dylib libgslcblas.a libgslcblas.dylib pkgconfig

$ ls /opt/local/lib/*gsl*

/opt/local/lib/libgsl.25.dylib /opt/local/lib/libgsl.dylib /opt/local/lib/libgslcblas.a

/opt/local/lib/libgsl.a /opt/local/lib/libgslcblas.0.dylib /opt/local/lib/libgslcblas.dylib