GCC Dynamic library building problem
- by Sirish Kumar
I am new to linux, while compiling with dynamic library I am getting the segmentationfault error.
I have two files
ctest1.c
void ctest1(int *i)
{
*i =10;
}
ctest2.c
void ctest2(int *i)
{
*i =20;
}
I have compiled both files to a shared library named libtest.so using following command
gcc -shared -W1,-soname,libtest.so.1 -o libtest.so.1.0.1 ctest1.o ctest2.o -lc
And I have wrote another program prog.c which uses functions exported by this library
prog.c
#include
void (ctest1)(int);
void (ctest2)(int*);
int main()
{
int a;
ctest1(&a);
printf("%d",a);
return 0;
}
And when I have built the executable with following command
gcc -Wall prog.c -L. -o prog
But when I run the generated executable I get the SegmentationFault error.
When I checked the header of prog with ldd it shows
linux-vdso.so.1 = (0x00007f99dff000)
libc.so.6 = /lib64/libc.so.6 (0x0007feeaa8c1000)
/lib64/ld-linux-x86-64.so.2 (0x00007feeaac1c000)
Can somebody tell what is the problem
