cmake can't find GiNaC despite it being installed

[salahmak]

Hi, I'm trying to compile and install Jemris, but when running cmake .., I get this error:

CMake Error at /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:230 (message):
  Could NOT find GiNaC (missing: GINAC_LIBRARIES GINAC_INCLUDE_DIRS)
Call Stack (most recent call first):
  /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:594 (_FPHSA_FAILURE_MESSAGE)
  cmake/FindGiNaC.cmake:155 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
  CMakeLists.txt:84 (find_package)

this is the output of ls /usr/include/ginac:

add.h         color.h       expair.h       flags.h     inifcns.h             ncmul.h          power.h       structure.h
archive.h     compiler.h    expairseq.h    function.h  integral.h            normal.h         print.h       symbol.h
assertion.h   constant.h    exprseq.h      ginac.h     integration_kernel.h  numeric.h        pseries.h     symmetry.h
basic.h       container.h   factor.h       hash_map.h  lst.h                 operators.h      ptr.h         tensor.h
class_info.h  excompiler.h  fail.h         idx.h       matrix.h              parse_context.h  registrar.h   version.h
clifford.h    ex.h          fderivative.h  indexed.h   mul.h                 parser.h         relational.h  wildcard.h

System info:
os: Archlinux
ginac version (from pacman): 1.8.2
jemris version: git

What I have tried to fix but failed:

• I have tried to remove the find_package(GiNaC REQUIRED) line and manually write: include_directories ("/usr/include/ginac/"), doing this allowed the cmake .. command run with no problem, but when running make, it compiles everything with no problem but it throws many errors while linking the binaries as shown in this picture:
  

• I have also tried manually compiling GiNac and doing the steps above, but got the same results.

Would be grateful if anyone helps, thanks