I have an issue on gcc 9.3.1 version for ARM, my code have two file that object_1.c is empty file and for main.c as
unsigned char test = 100;
int main(void)
{
/*Write code here*/
test++;
printf("Test lib");
return 0;
}
my command when linking as the example:
<gcc_path>/bin/arm-none-eabi-ld.exe -L<gcc_path>/arm-none-eabi/lib -L<gcc_path>/lib/gcc/arm-none-eabi/9.3.1 -lc -lm -T linker.ld object_1.o main.o -o run.elf
I have tried some ideas but it is not work. Could anyone help me with some ideas?
Related
I try to test the __gcov_dump function via a simple example like this:
tmp.c:
#include <stdio.h>
#include <gcov.h>
int main()
{
int i, total;
total = 0;
for (i = 0; i < 10; i++)
total += i;
if (total != 45)
printf ("Failure\n");
else
printf ("Success\n");
__gcov_dump();
}
~/Downloads/gcovtest ❯ g++ --coverage -lgcov tmp.c
/tmp/user/ccdEPxlm.o: In function main': tmp.c:(.text+0xa3): undefined reference to __gcov_dump()'
collect2: error: ld returned 1 exit status
Leaving out -lgcov makes not difference.
It's an Ubuntu 18.04 LTE with a
g++ (Ubuntu 9.4.0-1ubuntu1~18.04.1sav0) 9.4.0
/usr/lib/gcc/x86_64-linux-gnu/9/libgcov.a is present and the program tries to open it as strace says.
Any ideas what could be wrong?
Regards
Ok, it seems I cannot use the standard gcov.h header when using g++. I have to declare the method manually with c linkage:
extern "C" void __gcov_dump();
I am currently trying to use the DLFCN-WIN32 library in order to use a c++ script originally implemented to use the dlfcn.h library.
When compiling the code (cantera V2.3), everything goes well except when generating the shared library where the dlopen and dlclose functions are not found.
originally script is :
/**
* #file CustomKinetics.cpp
*
* #ingroup chemkinetics
*/
//
// Author: Q. Cazeres, A. Felden, P. Pepiot
//
//
#include "cantera/kinetics/CustomKinetics.h"
#include <iostream>
#include <dlfcn.h>
using namespace std;
namespace Cantera
{
CustomKinetics::CustomKinetics(thermo_t* th) : GasKinetics(th)
{
printf("WARNING: Using customized kinetics from f90 file.\n");
handle = dlopen("customkinetics.so", RTLD_LAZY);
// load symbol
ck = (ck_t) dlsym(handle, "customkinetics_");
}
void CustomKinetics::get_wdot_reduced(doublereal* wdot)
{
doublereal P = thermo().pressure();
doublereal T = thermo().temperature();
// New yarc2 format
//doublereal rho = thermo().density();
const doublereal* m_y = thermo().massFractions();
ck(&P,&T,&m_y[0],&wdot[0]);
// New yarc2 format
//ck(&P,&T,&rho,&m_y[0],&wdot[0]);
// Old yarc format
//mol/kmol conversion cantera is in kmol
for (size_t i=0;i<thermo().nSpecies();i++) {
wdot[i]=wdot[i]/1000.0;
}
}
The script is compiled with the following command line :
g++ -o build\src\kinetics\CustomKinetics.o -c -std=c++0x -lpsapi -O3 -Wno-inline -g -Wall -include src/pch/system.h -DNDEBUG -Iinclude -Iinclude\cantera\ext -Ibuild\src -Ibuild\src\L -Isrc\L -IL:\LIB_WINDOWS\DLFCN-WIN32\include -IL:\LIB_WINDOWS\BOOST\boost_1_78_0 src\kinetics\CustomKinetics.cpp
The shared library is compiled with the following command line :
scons: warning: Using $CXX to link Fortran and C++ code together.
This may generate a buggy executable if the 'g++'
compiler does not know how to deal with Fortran runtimes.
g++ -static-libgcc -static-libstdc++ -shared -o build\lib\cantera_shared.dll build\ext\libexecstream\exec-stream.o build\ext\fmt\fmt\format.o build\ext\fmt\fmt\ostream.o build\ext\fmt\fmt\posix.o build\ext\sundials\src\sundials\sundials_band.o build\ext\sundials\src\sundials\sundials_dense.o build\ext\sundials\src\sundials\sundials_direct.o build\ext\sundials\src\sundials\sundials_iterative.o build\ext\sundials\src\sundials\sundials_math.o build\ext\sundials\src\sundials\sundials_nvector.o build\ext\sundials\src\sundials\sundials_pcg.o build\ext\sundials\src\sundials\sundials_sparse.o build\ext\sundials\src\sundials\sundials_spbcgs.o build\ext\sundials\src\sundials\sundials_spfgmr.o build\ext\sundials\src\sundials\sundials_spgmr.o build\ext\sundials\src\sundials\sundials_sptfqmr.o build\ext\sundials\src\nvec_ser\fnvector_serial.o build\ext\sundials\src\nvec_ser\nvector_serial.o build\ext\sundials\src\cvodes\cvodea.o build\ext\sundials\src\cvodes\cvodea_io.o build\ext\sundials\src\cvodes\cvodes.o build\ext\sundials\src\cvodes\cvodes_band.o build\ext\sundials\src\cvodes\cvodes_bandpre.o build\ext\sundials\src\cvodes\cvodes_bbdpre.o build\ext\sundials\src\cvodes\cvodes_dense.o build\ext\sundials\src\cvodes\cvodes_diag.o build\ext\sundials\src\cvodes\cvodes_direct.o build\ext\sundials\src\cvodes\cvodes_io.o build\ext\sundials\src\cvodes\cvodes_sparse.o build\ext\sundials\src\cvodes\cvodes_spbcgs.o build\ext\sundials\src\cvodes\cvodes_spgmr.o build\ext\sundials\src\cvodes\cvodes_spils.o build\ext\sundials\src\cvodes\cvodes_sptfqmr.o build\ext\sundials\src\ida\ida.o build\ext\sundials\src\ida\ida_band.o build\ext\sundials\src\ida\ida_bbdpre.o build\ext\sundials\src\ida\ida_dense.o build\ext\sundials\src\ida\ida_direct.o build\ext\sundials\src\ida\ida_ic.o build\ext\sundials\src\ida\ida_io.o build\ext\sundials\src\ida\ida_sparse.o build\ext\sundials\src\ida\ida_spbcgs.o build\ext\sundials\src\ida\ida_spgmr.o build\ext\sundials\src\ida\ida_spils.o build\ext\sundials\src\ida\ida_sptfqmr.o build\src\base\Parser.o build\src\base\ValueCache.o build\src\base\application.o build\src\base\checkFinite.o build\src\base\clockWC.o build\src\base\ct2ctml.o build\src\base\ctexceptions.o build\src\base\ctml.o build\src\base\global.o build\src\base\plots.o build\src\base\stringUtils.o build\src\base\xml.o build\src\thermo\ConstCpPoly.o build\src\thermo\ConstDensityThermo.o build\src\thermo\DebyeHuckel.o build\src\thermo\Elements.o build\src\thermo\FixedChemPotSSTP.o build\src\thermo\GibbsExcessVPSSTP.o build\src\thermo\HMWSoln.o build\src\thermo\HMWSoln_input.o build\src\thermo\IdealGasPhase.o build\src\thermo\IdealMolalSoln.o build\src\thermo\IdealSolidSolnPhase.o build\src\thermo\IdealSolnGasVPSS.o build\src\thermo\IonsFromNeutralVPSSTP.o build\src\thermo\LatticePhase.o build\src\thermo\LatticeSolidPhase.o build\src\thermo\MargulesVPSSTP.o build\src\thermo\MaskellSolidSolnPhase.o build\src\thermo\MetalSHEelectrons.o build\src\thermo\MineralEQ3.o build\src\thermo\MixedSolventElectrolyte.o build\src\thermo\MixtureFugacityTP.o build\src\thermo\MolalityVPSSTP.o build\src\thermo\MolarityIonicVPSSTP.o build\src\thermo\Mu0Poly.o build\src\thermo\MultiSpeciesThermo.o build\src\thermo\Nasa9Poly1.o build\src\thermo\Nasa9PolyMultiTempRegion.o build\src\thermo\NasaPoly2.o build\src\thermo\PDSS.o build\src\thermo\PDSS_ConstVol.o build\src\thermo\PDSS_HKFT.o build\src\thermo\PDSS_IdealGas.o build\src\thermo\PDSS_IonsFromNeutral.o build\src\thermo\PDSS_SSVol.o build\src\thermo\PDSS_Water.o build\src\thermo\Phase.o build\src\thermo\PhaseCombo_Interaction.o build\src\thermo\PureFluidPhase.o build\src\thermo\RedlichKisterVPSSTP.o build\src\thermo\RedlichKwongMFTP.o build\src\thermo\SemiconductorPhase.o build\src\thermo\SingleSpeciesTP.o build\src\thermo\Species.o build\src\thermo\SpeciesThermoFactory.o build\src\thermo\SpeciesThermoInterpType.o build\src\thermo\StoichSubstance.o build\src\thermo\SurfPhase.o build\src\thermo\ThermoFactory.o build\src\thermo\ThermoPhase.o build\src\thermo\VPSSMgr.o build\src\thermo\VPSSMgrFactory.o build\src\thermo\VPSSMgr_ConstVol.o build\src\thermo\VPSSMgr_General.o build\src\thermo\VPSSMgr_IdealGas.o build\src\thermo\VPSSMgr_Water_ConstVol.o build\src\thermo\VPSSMgr_Water_HKFT.o build\src\thermo\VPStandardStateTP.o build\src\thermo\WaterProps.o build\src\thermo\WaterPropsIAPWS.o build\src\thermo\WaterPropsIAPWSphi.o build\src\thermo\WaterSSTP.o build\src\tpx\CarbonDioxide.o build\src\tpx\HFC134a.o build\src\tpx\Heptane.o build\src\tpx\Hydrogen.o build\src\tpx\Methane.o build\src\tpx\Nitrogen.o build\src\tpx\Oxygen.o build\src\tpx\RedlichKwong.o build\src\tpx\Sub.o build\src\tpx\Water.o build\src\tpx\lk.o build\src\tpx\utils.o build\src\equil\BasisOptimize.o build\src\equil\ChemEquil.o build\src\equil\MultiPhase.o build\src\equil\MultiPhaseEquil.o build\src\equil\vcs_Gibbs.o build\src\equil\vcs_MultiPhaseEquil.o build\src\equil\vcs_SpeciesProperties.o build\src\equil\vcs_TP.o build\src\equil\vcs_VolPhase.o build\src\equil\vcs_elem.o build\src\equil\vcs_elem_rearrange.o build\src\equil\vcs_inest.o build\src\equil\vcs_nondim.o build\src\equil\vcs_phaseStability.o build\src\equil\vcs_prep.o build\src\equil\vcs_prob.o build\src\equil\vcs_rearrange.o build\src\equil\vcs_report.o build\src\equil\vcs_rxnadj.o build\src\equil\vcs_setMolesLinProg.o build\src\equil\vcs_solve.o build\src\equil\vcs_solve_TP.o build\src\equil\vcs_solve_phaseStability.o build\src\equil\vcs_species_thermo.o build\src\equil\vcs_util.o build\src\numerics\BandMatrix.o build\src\numerics\CVodesIntegrator.o build\src\numerics\DAE_solvers.o build\src\numerics\DenseMatrix.o build\src\numerics\Func1.o build\src\numerics\FuncEval.o build\src\numerics\IDA_Solver.o build\src\numerics\ODE_integrators.o build\src\numerics\ResidJacEval.o build\src\numerics\RootFind.o build\src\numerics\SquareMatrix.o build\src\numerics\funcs.o build\src\numerics\polyfit.o build\src\kinetics\AqueousKinetics.o build\src\kinetics\BulkKinetics.o build\src\kinetics\C12H26_25_373_27_TJKinetics.o build\src\kinetics\C12H26_NOX_27_452_20_TJKinetics.o build\src\kinetics\C2H4_18_320_11_AFKinetics.o build\src\kinetics\C3H8_22_173_12_FCKinetics.o build\src\kinetics\C7H16_25_210_27_FCKinetics.o build\src\kinetics\CH4_22_320_18_TJKinetics.o build\src\kinetics\CustomKinetics.o build\src\kinetics\Falloff.o build\src\kinetics\FalloffFactory.o build\src\kinetics\GasKinetics.o build\src\kinetics\Group.o build\src\kinetics\HYCHEM_27_272_12_AFKinetics.o build\src\kinetics\HYCHEM_NOX_29_548_17_AFKinetics.o build\src\kinetics\ImplicitSurfChem.o build\src\kinetics\InterfaceKinetics.o build\src\kinetics\Kinetics.o build\src\kinetics\KineticsFactory.o build\src\kinetics\Reaction.o build\src\kinetics\ReactionPath.o build\src\kinetics\RxnRates.o build\src\kinetics\importKinetics.o build\src\kinetics\solveSP.o build\src\kinetics\c12h262537327tj.o build\src\kinetics\c12h262745220tj.o build\src\kinetics\c2h41832011af.o build\src\kinetics\c3h82217312fc.o build\src\kinetics\c7h162521027fc.o build\src\kinetics\ch42232018tj.o build\src\kinetics\hychem2727212af.o build\src\kinetics\hychemnox2954817af.o build\src\kinetics\sankaran13.o build\src\transport\AVBPTransport.o build\src\transport\DustyGasTransport.o build\src\transport\GasTransport.o build\src\transport\HighPressureGasTransport.o build\src\transport\LTPspecies.o build\src\transport\LiquidTranInteraction.o build\src\transport\LiquidTransport.o build\src\transport\LiquidTransportData.o build\src\transport\LiquidTransportParams.o build\src\transport\MMCollisionInt.o build\src\transport\MixTransport.o build\src\transport\MultiTransport.o build\src\transport\SimpleTransport.o build\src\transport\SolidTransport.o build\src\transport\SolidTransportData.o build\src\transport\TransportBase.o build\src\transport\TransportData.o build\src\transport\TransportFactory.o build\src\transport\TransportParams.o build\src\transport\WaterTransport.o build\src\oneD\Domain1D.o build\src\oneD\MultiJac.o build\src\oneD\MultiNewton.o build\src\oneD\OneDim.o build\src\oneD\Sim1D.o build\src\oneD\StFlow.o build\src\oneD\boundaries1D.o build\src\oneD\refine.o build\src\zeroD\ConstPressureReactor.o build\src\zeroD\FlowDevice.o build\src\zeroD\FlowReactor.o build\src\zeroD\IdealGasConstPressureReactor.o build\src\zeroD\IdealGasReactor.o build\src\zeroD\Reactor.o build\src\zeroD\ReactorBase.o build\src\zeroD\ReactorFactory.o build\src\zeroD\ReactorNet.o build\src\zeroD\ReactorSurface.o build\src\zeroD\Wall.o build\src\clib\ct.o build\src\clib\ctfunc.o build\src\clib\ctmultiphase.o build\src\clib\ctonedim.o build\src\clib\ctreactor.o build\src\clib\ctrpath.o build\src\clib\ctsurf.o build\src\clib\ctxml.o -Lbuild\lib -Lbuild\src\L -Lsrc\L -LL:\LIB_WINDOWS\DLFCN-WIN32\lib -Wl,--out-implib,build\lib\libcantera_shared.a -Wl,--output-def,build\lib\cantera_shared.def
And after that I got the following error message :
=====
b"build\\src\\kinetics\\CustomKinetics.o: In function `Cantera::CustomKinetics::CustomKinetics(Cantera::ThermoPhase*)':\r\nL:\\LIB_WINDOWS\\CANTERA\\cantera-avbp-2.3/src/kinetics/CustomKinetics.cpp:23: undefined reference to `dlopen'\r\nL:\\LIB_WINDOWS\\CANTERA\\cantera-avbp-2.3/src/kinetics/CustomKinetics.cpp:26: undefined reference to `dlsym'\r\nbuild\\src\\kinetics\\CustomKinetics.o: In function `Cantera::CustomKinetics::close_dl()':\r\nL:\\LIB_WINDOWS\\CANTERA\\cantera-avbp-2.3/src/kinetics/CustomKinetics.cpp:53: undefined reference to `dlclose'\r\nL:\\LIB_WINDOWS\\CANTERA\\cantera-avbp-2.3/src/kinetics/CustomKinetics.cpp:53: undefined reference to `dlclose'\r\ncollect2.exe: error: ld returned 1 exit status\r\n"
=====
scons: *** [build\lib\cantera_shared.dll] Error 1
scons: building terminated because of errors.
The include and lib directories of the DLFCN-WIN32 libraries are well put in argument with -L option. Did I forget a compilation option?
Thank you in advance for your help,
Rock
There is a function in aaa.c
int myadd(int a, int b){
return a+b;
}
and aaa.c was built into a static library using
gcc -c aaa.c -o aaa.o && ar -cr libaaa.a aaa.o
and a shared library using
gcc -c aaa.c -o aaa.o && gcc -shared -fPCI -o libaaa.so aaa.o
Then I wrote a file call.c, and try to call function myadd() in libaaa.so, but failed.
Please give me some advice,
test.c:
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
MODULE_LICENSE("Dual BSD/GPL");
extern int myadd(int a, int b);
static int hello_init(void)
{
int c = 0;
printk(KERN_ALERT "hello,I am Destiny\n");
c = myadd(1, 2);
printk(KERN_ALERT "res is (%d)\n", c);
return 0;
}
static void hello_exit(void)
{
printk(KERN_ALERT "goodbye,kernel\n");
}
module_init(hello_init);
module_exit(hello_exit);
MODULE_AUTHOR("Destiny");
MODULE_DESCRIPTION("This is a simple example!\n");
MODULE_ALIAS("A simplest example");
This Makefile will make both c file into call.ko, and it will work. But that's not what I want.
Makefile :
KVERSION = $(shell uname -r)
obj-m = call.o
call-objs = aaa.o test.o
Debug:
make -C /lib/modules/$(KVERSION)/build M=$(PWD) modules
All:Debug
cleanDebug:
make -C /lib/modules/$(KVERSION)/build M=/home/Destiny/myProject/kernel/cbtest/ clean
clean:cleanDebug
installDebug:Debug
rmmod /lib/modules/2.6.18-348.12.1.el5/test/call.ko
/bin/cp call.ko /lib/modules/$(KVERSION)/test/
depmod -a
insmod /lib/modules/2.6.18-348.12.1.el5/test/call.ko
install:installDebug
main.o : defs.h
Ko files are running in kernel space , not user space where application running. Libc or libc++ and so on on are prepared for user space application. So you can not link libc/c++ functions, Just like you cannot link any libc functions in kernel.
I've seen several other posts that deal with this exact same issue. However, none of their solutions seem to work for me. I am compiling the following code:
#include <boost/numeric/ublas/matrix.hpp>
#include <boost/numeric/ublas/io.hpp>
#include <boost/timer/timer.hpp>
using namespace boost::numeric::ublas;
int main(){
matrix<double> mat1 (3,3);
matrix<double> mat2 (3,3);
matrix<double> mat3 (3,3);
unsigned k=0;
for(unsigned i = 0; i < mat1.size1(); ++i){
for(unsigned j = 0; j < mat1.size2(); ++j){
mat1(i,j) = k;
mat2(i,j) = 2*k++;
}
}
k=0;
if(1){
boost::timer::auto_cpu_timer t;
while(k<1000){
mat3 = prod(mat1,mat2);
k++;
}
}
return 0;
}
I am compiling from the command line using:
$ g++ matrix_test.cpp -o matrix_test -lboost_system -lboost_timer
and receiving the following error:
usr/lib/gcc/i686-redhat-linux/4.7.0/../../../libboost_timer.so:
undefined reference to `boost::chrono::steady_clock::now()'
collect2: error: ld returned 1 exit status
If I add -lboost_chrono when I compile, I get this error:
/usr/lib/gcc/i686-redhat-linux/4.7.0/../../../libboost_chrono.so:
undefined reference to `clock_gettime'
collect2: error: ld returned 1 exit status
I can trace clock_gettime to sys/time.h. Unfortunately, I cannot find a corresponding .so file to link to. What am I missing here?
You must add -lrt to your link libraries
g++ matrix_test.cpp -o matrix_test -lboost_system -lboost_timer -lboost_chrono -lrt
Update (2016-08-31)
This still seems to be an issue. When you lookup man clock_gettime, this leads to the solution (-lrt), but it also says
Link with -lrt (only for glibc versions before 2.17).
So when your glibc is newer, your problem might be something else.
Add -lrt to your g++ invocation – clock_gettime is in librt.so.
I am working on getting a few files to link together using my make file and c++ and am getting the following error when running make.
g++ -bind_at_load `pkg-config --cflags opencv` -c -o compute_gist.o compute_gist.cpp
g++ -bind_at_load `pkg-config --cflags opencv` -c -o gist.o gist.cpp
g++ -bind_at_load `pkg-config --cflags opencv` -c -o standalone_image.o standalone_image.cpp
g++ -bind_at_load `pkg-config --cflags opencv` -c -o IplImageConverter.o IplImageConverter.cpp
g++ -bind_at_load `pkg-config --cflags opencv` -c -o GistCalculator.o GistCalculator.cpp
g++ -bind_at_load `pkg-config --cflags opencv` `pkg-config --libs opencv` compute_gist.o gist.o standalone_image.o IplImageConverter.o GistCalculator.o -o rungist
Undefined symbols for architecture x86_64:
"color_gist_scaletab(color_image_t*, int, int, int const*)", referenced from:
_main in compute_gist.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
make: *** [rungist] Error 1
My makefile is as follows (Note, I don't need opencv bindings yet, but will be coding in opencv later.
CXX = g++
CXXFLAGS = -bind_at_load `pkg-config --cflags opencv`
LFLAGS = `pkg-config --libs opencv`
SRC = \
compute_gist.cpp \
gist.cpp \
standalone_image.cpp \
IplImageConverter.cpp \
GistCalculator.cpp
OBJS = $(SRC:.cpp=.o)
rungist: $(OBJS)
$(CXX) $(CXXFLAGS) $(LFLAGS) $(OBJS) -o $#
all: rungist
clean:
rm -rf $(OBJS) rungist
The method header is located in gist.h
float *color_gist_scaletab(color_image_t *src, int nblocks, int n_scale, const int *n_orientations);
And the method is defined in gist.cpp
float *color_gist_scaletab(color_image_t *src, int w, int n_scale, const int *n_orientation) {
And finally the compute_gist.cpp (main file)
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "gist.h"
static color_image_t *load_ppm(const char *fname) {
FILE *f=fopen(fname,"r");
if(!f) {
perror("could not open infile");
exit(1);
}
int width,height,maxval;
if(fscanf(f,"P6 %d %d %d",&width,&height,&maxval)!=3 || maxval!=255) {
fprintf(stderr,"Error: input not a raw PPM with maxval 255\n");
exit(1);
}
fgetc(f); /* eat the newline */
color_image_t *im=color_image_new(width,height);
int i;
for(i=0;i<width*height;i++) {
im->c1[i]=fgetc(f);
im->c2[i]=fgetc(f);
im->c3[i]=fgetc(f);
}
fclose(f);
return im;
}
static void usage(void) {
fprintf(stderr,"compute_gist options... [infilename]\n"
"infile is a PPM raw file\n"
"options:\n"
"[-nblocks nb] use a grid of nb*nb cells (default 4)\n"
"[-orientationsPerScale o_1,..,o_n] use n scales and compute o_i orientations for scale i\n"
);
exit(1);
}
int main(int argc,char **args) {
const char *infilename="/dev/stdin";
int nblocks=4;
int n_scale=3;
int orientations_per_scale[50]={8,8,4};
while(*++args) {
const char *a=*args;
if(!strcmp(a,"-h")) usage();
else if(!strcmp(a,"-nblocks")) {
if(!sscanf(*++args,"%d",&nblocks)) {
fprintf(stderr,"could not parse %s argument",a);
usage();
}
} else if(!strcmp(a,"-orientationsPerScale")) {
char *c;
n_scale=0;
for(c=strtok(*++args,",");c;c=strtok(NULL,",")) {
if(!sscanf(c,"%d",&orientations_per_scale[n_scale++])) {
fprintf(stderr,"could not parse %s argument",a);
usage();
}
}
} else {
infilename=a;
}
}
color_image_t *im=load_ppm(infilename);
//Here's the method call -> :(
float *desc=color_gist_scaletab(im,nblocks,n_scale,orientations_per_scale);
int i;
int descsize=0;
//compute descriptor size
for(i=0;i<n_scale;i++)
descsize+=nblocks*nblocks*orientations_per_scale[i];
descsize*=3; // color
//print descriptor
for(i=0;i<descsize;i++)
printf("%.4f ",desc[i]);
printf("\n");
free(desc);
color_image_delete(im);
return 0;
}
Any help would be greatly appreciated. I hope this is enough info. Let me know if I need to add more.
I suspect that color_gist_scaletab should be declared as extern "C" in your header file:
extern "C" {
float *color_gist_scaletab(color_image_t *src, int nblocks, int n_scale, const int *n_orientations);
}
Your link command line is incorrect. See this answer.
However, that is likely not the problem you are seeing here.
What do the following commands print?
file gist.o
nm gist.o | grep color_gist_scaletab
I also see this very similar question. But there, color_gist_scaletab comes from gist.c, not gist.cpp. You didn't just rename gist.c to gist.cpp, did you? Don't do that.