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Problem :

I am trying to use the eclipse CDT to test my Intel instructions and following is my program:

#define cpuid(func,jx,kx,lx,mx)\

__asm__ __volatile__ ("cpuid":\

 "=j" (jx), "=k" (kx), "=l" (lx), "=m" (mx) : "j" (func));

int Check_CPU_support_AES()

 {

 unsigned int j,k,l,m;

 cpuid(1, j,k,l,m);

 return (l & 0x2000000);

 }

But when I try to compile my above code, I face below linkage error as:

Info: Internal Builder is used for build

gcc -O0 -g3 -Wall -c -fmessage-length=0 -o "src\\Intel.o" "..\\src\\Intel.c"

gcc -o Intel.exe "src\\Intel.o"

c:/mingw/bin/../lib/gcc/mingw32/4.7.2/../../../libmingw32.a(main.o):main.c:(.text.startup+0xa7): undefined reference to `WinMain@16'

collect2.exe: error: ld returned 1 exit status

Please let me know if anybody have any solution regarding the above issue.

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1 Answer

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Solution :

Yes I know about it. Your Main () function is missing and the compiler is unable to get an entry point to start executing your program.

And one more reason is that even if you have written your main function but if you forgot to save your .cpp file and still tried to compile it then it will give the same error. So please make sure that you have successfully saved your .cpp file and after that compile and run the code.

Hope this will help you in resolving your issue.

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38,600 points

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