Hi, I have installed the CLN library version 1.3.0 and wanted to use it. however I am not able to compile even the simple fibonacci.cpp example. I have installed the library with ./configure --prefix=/home/schulz_m and i tried to use your documentation to set all the compiler flags appropriately. the original files after unpacking are under /home/schulz_m/cln-1.3.0 and the fibon.cpp is in my home directory. after typing make test I get the following error (makefile and cpp, g++ version below): make test g++ -02 -I/home/schulz_m/include/ -Icln-1.3.0/include/ fibon.cpp -o test g++: unrecognized option '-02' /tmp/ccJKw2VF.o: In function `__static_initialization_and_destruction_0(int, int)': fibon.cpp:(.text+0x159): undefined reference to `cln::cl_random_def_init_helper::cl_random_def_init_helper()' fibon.cpp:(.text+0x18d): undefined reference to `cln::cl_FF_globals_init_helper::cl_FF_globals_init_helper()' fibon.cpp:(.text+0x1b5): undefined reference to `cln::cl_DF_globals_init_helper::cl_DF_globals_init_helper()' fibon.cpp:(.text+0x1dd): undefined reference to `cln::cl_LF_globals_init_helper::cl_LF_globals_init_helper()' /tmp/ccJKw2VF.o: In function `__tcf_4': fibon.cpp:(.text+0x22a): undefined reference to `cln::cl_LF_globals_init_helper::~cl_LF_globals_init_helper()' /tmp/ccJKw2VF.o: In function `__tcf_3': fibon.cpp:(.text+0x23e): undefined reference to `cln::cl_DF_globals_init_helper::~cl_DF_globals_init_helper()' /tmp/ccJKw2VF.o: In function `__tcf_2': fibon.cpp:(.text+0x252): undefined reference to `cln::cl_FF_globals_init_helper::~cl_FF_globals_init_helper()' /tmp/ccJKw2VF.o: In function `__tcf_1': fibon.cpp:(.text+0x266): undefined reference to `cln::cl_random_def_init_helper::~cl_random_def_init_helper()' /tmp/ccJKw2VF.o: In function `fibonacci(int)': fibon.cpp:(.text+0x2c0): undefined reference to `cln::float_format(unsigned long long)' fibon.cpp:(.text+0x2fc): undefined reference to `cln::sqrt(cln::cl_F const&)' fibon.cpp:(.text+0x3c7): undefined reference to `cln::expt(cln::cl_R const&, long)' fibon.cpp:(.text+0x3e3): undefined reference to `cln::operator/(cln::cl_R const&, cln::cl_R const&)' fibon.cpp:(.text+0x3f8): undefined reference to `cln::round1(cln::cl_R const&)' /tmp/ccJKw2VF.o: In function `cln::cl_I_classes_dummy::cl_I_classes_dummy()': fibon.cpp:(.gnu.linkonce.t._ZN3cln18cl_I_classes_dummyC1Ev+0x9): undefined reference to `cln::cl_class_fixnum' /tmp/ccJKw2VF.o: In function `cln::cl_gc_dec_pointer_refcount(cln::cl_heap*)': fibon.cpp:(.gnu.linkonce.t._ZN3cln26cl_gc_dec_pointer_refcountEPNS_7cl_heapE+0x28): undefined reference to `cln::cl_free_heap_object(cln::cl_heap*)' /tmp/ccJKw2VF.o: In function `cln::operator/(cln::cl_R const&, int)': fibon.cpp:(.gnu.linkonce.t._ZN3clndvERKNS_4cl_REi+0x2e): undefined reference to `cln::operator/(cln::cl_R const&, cln::cl_R const&)' /tmp/ccJKw2VF.o: In function `cln::cl_float(int, cln::float_format_t)': fibon.cpp:(.gnu.linkonce.t._ZN3cln8cl_floatEiNS_14float_format_tE+0x41): undefined reference to `cln::cl_float(cln::cl_I const&, cln::float_format_t)' /tmp/ccJKw2VF.o: In function `cln::operator+(int, cln::cl_R const&)': fibon.cpp:(.gnu.linkonce.t._ZN3clnplEiRKNS_4cl_RE+0x2e): undefined reference to `cln::operator+(cln::cl_R const&, cln::cl_R const&)' collect2: ld returned 1 exit status make: *** [test] Error 1 ----makefile CLN_DIR=/home/schulz_m/ CLN_TARGETDIR=cln-1.3.0/ CC=g++ CFLAGS= -I$(CLN_DIR)include/ -I$(CLN_TARGETDIR)include/ CXXFLAGS= -02 test: $(CC) $(CXXFLAGS) $(CFLAGS) fibon.cpp -o test all: test ----fibon.cpp: #include <iostream> //#include <cln/cln.h> #include "cln/integer.h" #include "cln/real.h" using namespace cln; // Returns F_n, computed as the nearest integer to // ((1+sqrt(5))/2)^n/sqrt(5). Assume n>=0. cl_I fibonacci (int n) { // Need a precision of ((1+sqrt(5))/2)^-n. float_format_t prec = float_format((int)(0.208987641*n+5)); cl_R sqrt5 = sqrt(cl_float(5,prec)); cl_R phi = (1+sqrt5)/2; return round1( expt(phi,n)/sqrt5 ); } int main(){ cl_I tt=fibonacci(4); std::cout<< "fibon:"; return 1; } ----this is my g++ version Using built-in specs. Target: i686-pc-linux-gnu Configured with: ../gcc-4.2.0/configure --prefix=/usr --libexecdir=/usr/lib --enable-shared --enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu --disable-multilib --disable-nls --enable-languages=c,c++,fortran Thread model: posix gcc version 4.2.0 Thanks for any advice! Best wishes, Marcel