c++ - Why am I getting an “Undefined reference” error when I run my Makefile on some computers, but not others? -

i doing research on parallel processing , need test counter output different parallel-ization apis. every time try make code, undefined reference 'papi_....

i using papi 5.1.1 , know directories libpapi.a , papi.h in. had no issues running makefile on pc on other 1 need, doesn't seem working. here's have

cc=g++ cflags="-fopenmp" lib=/usr/local/lib/libpapi.a -lm -lpthread include=-i/usr/local/include  all: test      echo "done" test: testpandp.cpp      ${cc} ${cflags} ${lib} ${include} -o test testpandp.cpp clean:      ${rm} *.o test 

i have read other posts asking undefined reference but, every 1 i've seen suggested use -l/usr/local/lib or /usr/local/lib/libpapi.a, i'm doing.

does have other suggestions?

depending on version of linker, order of libs might give trouble. why can compile in machines not in others.

changing order of compilation should it:

test: testpandp.cpp      ${cc} ${cflags} ${include} -o test testpandp.cpp ${lib} 

further information in question linking order.