OpenCL undefined reference but lib files in the right place

I have encountered a strange problem while setting up my PC (Win 7 Ultimate 64 CPU AMD/ GPU AMD) for our current Projekt which requires OpenCL.

I have MSYS so I am working on mingw with gcc. I am desperately trying to compile a simple piece of work called openclexample.

Note: the directory containing "openclexample" does contain a lib folder including the reimplemented libOpenCL.a, OpenCL.lib and OVDecode64.lib.

OpenCL.dll in in windows/system32

now when I try to compile using

$ gcc -std=c99 -lOpenCL -o openclexample.exe openclexample.c

all I get is a bunch of undefined reference errors in ALL funktions listet within the OpenCL.def

Ani@ANYONE /d/StuPro/OpenCLtests
$ gcc -std=c99 -lOpenCL -o openclexample.exe openclexample.c 
openclexample.c: In function 'main':
openclexample.c:214:3: warning: implicit declaration of function 'srandom' [-Wim
plicit-function-declaration]
openclexample.c:217:7: warning: implicit declaration of function 'random' [-Wimp
licit-function-declaration]
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x35): undefin
ed reference to `clGetDeviceIDs@24'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x8c): undefin
ed reference to `clCreateContext@24'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0xd9): undefin
ed reference to `clCreateCommandQueue@20'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x127): undefi
ned reference to `clCreateProgramWithSource@20'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x17f): undefi
ned reference to `clBuildProgram@24'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x1be): undefi
ned reference to `clCreateKernel@12'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x22c): undefi
ned reference to `clCreateBuffer@24'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x264): undefi
ned reference to `clCreateBuffer@24'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x29c): undefi
ned reference to `clCreateBuffer@24'
C:\Users\Ani\A开发者_开发技巧ppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x2f1): undefi
ned reference to `clSetKernelArg@16'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x319): undefi
ned reference to `clSetKernelArg@16'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x346): undefi
ned reference to `clSetKernelArg@16'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x373): undefi
ned reference to `clSetKernelArg@16'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x3e5): undefi
ned reference to `clEnqueueWriteBuffer@36'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x433): undefi
ned reference to `clEnqueueWriteBuffer@36'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x4b2): undefi
ned reference to `clEnqueueNDRangeKernel@36'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x51f): undefi
ned reference to `clEnqueueReadBuffer@36'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x54f): undefi
ned reference to `clFinish@4'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x55d): undefi
ned reference to `clReleaseMemObject@4'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x56b): undefi
ned reference to `clReleaseMemObject@4'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x579): undefi
ned reference to `clReleaseMemObject@4'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x587): undefi
ned reference to `clReleaseKernel@4'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x595): undefi
ned reference to `clReleaseProgram@4'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x5a3): undefi
ned reference to `clReleaseCommandQueue@4'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x5b1): undefi
ned reference to `clReleaseContext@4'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x72a): undefi
ned reference to `srandom'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x75f): undefi
ned reference to `random'
C:\Users\Ani\AppData\Local\Temp\ccOLx5XT.o:openclexample.c:(.text+0x7a4): undefi
ned reference to `random'
collect2: ld returned 1 exit status

I have read hundreds of threads but didn't find the solution, some suggested link it with -static, or enter the path where your lib files are... didn't work either.

I'd be really grateful if anyone else had an idea!

The arguments to the linker have to be in the right order. You can see that the library search path (-L) is OK because the linker doesn't whine about not finding libraries. The symbols are undefined because -lOpenCL was mentioned before the object/source file that is using it.

$ gcc -std=c99 -o openclexample.exe openclexample.c -lOpenCL