By: agencja interaktywna krakow

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By: Muhammad Faisal

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By: Dragoon

Dragoon — Fri, 09 Mar 2012 07:15:46 +0000

m suing header files as omp.h stdio.h time.h…and sm more it didnt pasted in abv post…Program is working file without omp_num_threads and all
So,please tell me how can i use omp here…..
do i need to install threads or need to perform any other settings???

By: Dragoon

Dragoon — Fri, 09 Mar 2012 07:12:15 +0000

when i am trying
gcc title.c
…its givng error like omp_set_num_threads undefiened.

when i gave the command as u told that is
gcc -fopenmp prog1.c
it was givng errors like

C:\Documents and Settings\Avi>cd C:\

C:\>gcc -fopenmp title.c
c:/mingw/bin/../lib/gcc/mingw32/4.6.2/../../../crt2.o: In function `_mingw_CRTSt
artup’:
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:193: undefined reference to `__dyn
_tls_init_callback’
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:202: undefined reference to `SetUn
handledExceptionFilter@4′
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:207: undefined reference to `__cpu
_features_init’
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:208: undefined reference to `_fpre
set’
c:/mingw/bin/../lib/gcc/mingw32/4.6.2/../../../crt2.o: In function `mingw32_init
_mainargs’:
C:\MinGW\msys\1.0\src\mingwrt/../mingw/init.c:60: undefined reference to `_CRT_g
lob’
C:\MinGW\msys\1.0\src\mingwrt/../mingw/init.c:60: undefined reference to `__getm
ainargs’
c:/mingw/bin/../lib/gcc/mingw32/4.6.2/../../../crt2.o: In function `mingw32_init
_fmode’:
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:70: undefined reference to `_CRT_f
mode’
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:97: undefined reference to `__p__f
mode’
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:97: undefined reference to `_fmode
‘
c:/mingw/bin/../lib/gcc/mingw32/4.6.2/../../../crt2.o: In function `_mingw_CRTSt
artup’:
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:224: undefined reference to `_pei3
86_runtime_relocator’
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:236: undefined reference to `__mai
n’
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:244: undefined reference to `__p__
environ’
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:250: undefined reference to `_cexi
t’
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:252: undefined reference to `ExitP
rocess@4′
c:/mingw/bin/../lib/gcc/mingw32/4.6.2/../../../crt2.o: In function `mingw32_init
_fmode’:
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:72: undefined reference to `_fmode
‘
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:83: undefined reference to `_imp__
_iob’
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:83: undefined reference to `_setmo
de’
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:87: undefined reference to `_CRT_f
mode’
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:87: undefined reference to `_setmo
de’
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:91: undefined reference to `_CRT_f
mode’
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:91: undefined reference to `_setmo
de’
c:/mingw/bin/../lib/gcc/mingw32/4.6.2/../../../crt2.o: In function `gnu_exceptio
n_handler’:
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:162: undefined reference to `signa
l’
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:135: undefined reference to `signa
l’
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:116: undefined reference to `signa
l’
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:140: undefined reference to `signa
l’
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:121: undefined reference to `signa
l’
c:/mingw/bin/../lib/gcc/mingw32/4.6.2/../../../crt2.o:C:\MinGW\msys\1.0\src\ming
wrt/../mingw/crt1.c:165: more undefined references to `signal’ follow
c:/mingw/bin/../lib/gcc/mingw32/4.6.2/../../../crt2.o: In function `gnu_exceptio
n_handler’:
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:167: undefined reference to `_fpre
set’
c:/mingw/bin/../lib/gcc/mingw32/4.6.2/../../../crt2.o: In function `mainCRTStart
up’:
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:262: undefined reference to `_imp_
___set_app_type’
c:/mingw/bin/../lib/gcc/mingw32/4.6.2/../../../crt2.o: In function `WinMainCRTSt
artup’:
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:276: undefined reference to `_imp_
___set_app_type’
c:/mingw/bin/../lib/gcc/mingw32/4.6.2/../../../crt2.o: In function `atexit’:
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:288: undefined reference to `_imp_
_atexit’
c:/mingw/bin/../lib/gcc/mingw32/4.6.2/../../../crt2.o: In function `onexit’:
C:\MinGW\msys\1.0\src\mingwrt/../mingw/crt1.c:296: undefined reference to `_imp_
__onexit’
c:/mingw/bin/../lib/gcc/mingw32/4.6.2/crtbegin.o:cygming-crtbegin.c:(.text+0xe):
undefined reference to `GetModuleHandleA@4′
c:/mingw/bin/../lib/gcc/mingw32/4.6.2/crtbegin.o:cygming-crtbegin.c:(.text+0×23)
: undefined reference to `GetProcAddress@8′
c:/mingw/bin/../lib/gcc/mingw32/4.6.2/crtbegin.o:cygming-crtbegin.c:(.text+0×51)
: undefined reference to `GetModuleHandleA@4′
c:/mingw/bin/../lib/gcc/mingw32/4.6.2/crtbegin.o:cygming-crtbegin.c:(.text+0×66)
: undefined reference to `GetProcAddress@8′
c:/mingw/bin/../lib/gcc/mingw32/4.6.2/crtbegin.o:cygming-crtbegin.c:(.text+0x9a)
: undefined reference to `GetModuleHandleA@4′
c:/mingw/bin/../lib/gcc/mingw32/4.6.2/crtbegin.o:cygming-crtbegin.c:(.text+0xaf)
: undefined reference to `GetProcAddress@8′
C:\DOCUME~1\Avi\LOCALS~1\Temp\ccYSWgNR.o:title.c:(.text+0xa): undefined referenc
e to `__main’
C:\DOCUME~1\Avi\LOCALS~1\Temp\ccYSWgNR.o:title.c:(.text+0x3b): undefined referen
ce to `printf’
C:\DOCUME~1\Avi\LOCALS~1\Temp\ccYSWgNR.o:title.c:(.text+0×47): undefined referen
ce to `puts’
C:\DOCUME~1\Avi\LOCALS~1\Temp\ccYSWgNR.o:title.c:(.text+0x5b): undefined referen
ce to `scanf’
C:\DOCUME~1\Avi\LOCALS~1\Temp\ccYSWgNR.o:title.c:(.text+0x6f): undefined referen
ce to `fopen’
C:\DOCUME~1\Avi\LOCALS~1\Temp\ccYSWgNR.o:title.c:(.text+0×86): undefined referen
ce to `puts’
C:\DOCUME~1\Avi\LOCALS~1\Temp\ccYSWgNR.o:title.c:(.text+0×92): undefined referen
ce to `exit’
C:\DOCUME~1\Avi\LOCALS~1\Temp\ccYSWgNR.o:title.c:(.text+0xb6): undefined referen
ce to `fscanf’
C:\DOCUME~1\Avi\LOCALS~1\Temp\ccYSWgNR.o:title.c:(.text+0xe4): undefined referen
ce to `fscanf’
C:\DOCUME~1\Avi\LOCALS~1\Temp\ccYSWgNR.o:title.c:(.text+0xfb): undefined referen
ce to `fclose’
C:\DOCUME~1\Avi\LOCALS~1\Temp\ccYSWgNR.o:title.c:(.text+0×109): undefined refere
nce to `clock’
C:\DOCUME~1\Avi\LOCALS~1\Temp\ccYSWgNR.o:title.c:(.text+0x12f): undefined refere
nce to `clock’
C:\DOCUME~1\Avi\LOCALS~1\Temp\ccYSWgNR.o:title.c:(.text+0×160): undefined refere
nce to `printf’
C:\DOCUME~1\Avi\LOCALS~1\Temp\ccYSWgNR.o:title.c:(.text+0x17c): undefined refere
nce to `printf’
C:\DOCUME~1\Avi\LOCALS~1\Temp\ccYSWgNR.o:title.c:(.text+0×194): undefined refere
nce to `printf’
C:\DOCUME~1\Avi\LOCALS~1\Temp\ccYSWgNR.o:title.c:(.text+0x1c2): undefined refere
nce to `printf’
collect2: ld returned 1 exit status

morever i set my PATH variable to
C:\MinGW\lib\gcc\4.6.2\

i am using MinGW gcc 4.6.2
please give any useful suggestion to me.
my program is like this

#include

#include
#include
#include
#include
#define MAX 10000000

void mergesort(float a[],int,int);
void merge(float a[],int,int,int);

float a[MAX],b[MAX];
char ar[MAX];

int main()
{
FILE *fp;

int i,n=0,j;
float time;
clock_t start,stop;
double startTime,endTime,wt;
int iCPU=omp_get_num_procs();

omp_set_num_threads(iCPU);
printf(“nNo of cpu’s=%d\n”,iCPU);

printf(“Parallel version of Merge sort.\nEnter the data file name :\n”);
scanf(“%s”,ar);
if((fp=fopen(ar,”r”))==NULL)
{
printf(“Can’t open file\n”);
exit(1);
}
i=fscanf(fp,”%f”,&a[n]);
while(i != EOF)
{
//printf(“%d,”,a[n]);
n++;
i=fscanf(fp,”%f”,&a[n]);
}
fclose(fp);

startTime=omp_get_wtime();

start=clock();
mergesort(a,0,n-1);
stop=clock();

endTime=omp_get_wtime();

printf(“\nNo of elements=%d\nstart time=%10.9f”,n,((float)(start)/ CLOCKS_PER_SEC));
printf(“\nstop=%10.9f”,((float)(stop)/CLOCKS_PER_SEC));
printf(“\nElapsed time=%10.9f”,(double)(endTime-startTime));
printf(“\nTime taken :%10.9f secs\n”,(((float)(stop-start))/CLOCKS_PER_SEC));

}

void mergesort(float a[],int low,int high)
{
int mid;

if (low {
mid=(low+high)/2;
#pragma omp parallel
{
#pragma omp sections nowait
{
#pragma omp section
mergesort(a,low,mid);
#pragma omp section
mergesort(a,mid+1,high);
}}
merge(a,low,mid,high);
}
}
void merge(float a[],int low,int mid,int high)
{
int i,h,j,k;
h=i=low;
j= mid + 1;

while((h<=mid) && (j<=high))
if (a[h]mid)
for(k=j;k<=high;k++)
b[i++]=a[k];
else
for(k=h;k<=mid;k++)
b[i++]=a[k];

for(k=low;k<=high;k++)
a[k]=b[k];
}

but its not geting executed using MInGW

Comments on: Programming for multicore: An introduction to OpenMP using GCC-4.4

By: agencja interaktywna krakow

By: Rodzicielstwo

By: organic gardening

By: machine a affranchir

By: Raymond Huddleston

By: Vada Lippold

By: Google Places Optimization Service

By: Muhammad Faisal

By: Dragoon

By: Dragoon