skipping incompatible when searching for -lgpstk - c

Question

I am trying "make" command on my linux to create an exe file, but I keep getting an error
/usr/bin/ld: skipping incompatible ../../../shared/gpstk/src/libgpstk.a when searching for -lgpstk
/usr/bin/ld: cannot find -lgpstk
collect2: error: ld returned 1 exit status
../../../shared/makehome/common.makefile:79: recipe for target '../../../shared/binflate/src/binflate' failed
I have tried to download libraries through search online but I can't seem to get past this error. Can someone please help me out.
Here is the makefile code:
TARGET = linux
#----------------------------------------------------------------- Directories
# Where make will put outputs and intermediate files
SVNROOTDIR = ../../..
OBJDIR = $(SVNROOTDIR)/obj
BINDIR = $(SVNROOTDIR)/shared/binflate/src
LIBDIR = $(BINDIR)
#--------------------------------------------------------------------- Outputs
# What we are trying to build:
# Note: If you want this makefile to build an EXECUTABLE, leave LIBRARY
# undefined, and vice versa if you want to build a static LIBRARY
EXECUTABLE = $(BINDIR)/binflate
LIBRARY =
#--------------------------------------------------------------------- Sources
SOURCES = $(SVNROOTDIR)/shared/core/src/basetime.cpp \
$(SVNROOTDIR)/shared/core/src/parameters.cpp \
$(SVNROOTDIR)/shared/core/src/report.cpp \
$(SVNROOTDIR)/shared/core/src/datalog.cpp \
$(SVNROOTDIR)/shared/core/src/util.cpp \
$(SVNROOTDIR)/shared/core/src/serialutil.cpp \
$(SVNROOTDIR)/shared/core/src/signaltype.cpp \
$(SVNROOTDIR)/shared/core/src/channeltype.cpp \
$(SVNROOTDIR)/shared/core/src/gridframework.cpp \
$(SVNROOTDIR)/shared/core/src/binhelper.cpp \
$(SVNROOTDIR)/shared/core/src/observables.cpp \
$(SVNROOTDIR)/shared/core/src/txid.cpp \
$(SVNROOTDIR)/shared/core/src/ReportWrapper.cpp \
$(SVNROOTDIR)/shared/binflate/src/binflate.cpp
# include directories in gcc format
INCL = -I../include \
-I$(SVNROOTDIR)/shared/core/include \
-I$(SVNROOTDIR)/shared/gpstk/include
# Libraries
LIBS = -lm -lgpstk
# Library include directories in gcc format (-Lpath/to/dir1 -Lpath/to/dir2)
INCLLIB = -L$(SVNROOTDIR)/shared/gpstk/src \
-L/usr/local/lib
# Predefine macros
PREDEFINES =
#------------------------------------ Compilers, linkers, etc. and their flags
CC = g++
CCFLAGS = -g -Wall -Wno-unknown-pragmas \
-Wno-uninitialized $(PREDEFINES)
CCINCL = $(INCL)
LIBEXE = ar
LIBFLAGS = rcs
LIBINCL =
LNKEXE = g++
LNKFLAGS =
LNKINCL =
MD = g++
MDFLAGS = -MM
MDINCL = $(INCL)
#---------------------------------------------------------- Included Makefiles
include $(SVNROOTDIR)/shared/makehome/common.makefile