Re: how to compile the .so to allow extern functions

["andy wang" <ypwangreg at gmail dot com>]

Done:-), thank Brain for the help!

$ cat bug1.c
//this will be .so and will call an extern func1() in the main proc
int func1();
int myfunc()
{
 printf("in myfunc.so\n");
 func1();
}


$ cat bug1-main.c
#include <dlfcn.h>

int func1()
{
 printf("in main.func1()\n");
 return 0;
}
int main()
{
 int (*mf)();
 void *handle = dlopen("bug1.so", RTLD_LAZY);
 if(handle) {
   mf = dlsym(handle, "myfunc");
   if(mf) mf();
   dlclose(handle);
 }
 return 0;
}


$ gcc -shared -o bug1-main.so bug1-main.c -ldl -Wl,--out-implib=libmain.dll.a
Creating library file: libmain.dll.a


$ gcc -shared -o bug1.so bug1.c  -L. -lmain


$ gcc -o bug1-main bug1-main.c -ldl


$ ./bug1-main.exe
in myfunc.so
in main.func1()

Regards,
Andy

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/