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main_AB.dlopen.c
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main_AB.dlopen.c
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#include <stdio.h>
#include <stdlib.h>
#include <dlfcn.h>
// #define DLOPEN_FLAGS RTLD_LAZY | RTLD_LOCAL
#define DLOPEN_FLAGS RTLD_LAZY
#if defined(_WIN32) || defined(__CYGWIN__)
// Windows (x86 or x64)
const char* libA = "libA.shared.dll";
const char* libB = "libB.shared.dll";
#elif defined(__linux__)
// Linux
const char* libA = "libA.shared.so";
const char* libB = "libB.shared.so";
#elif defined(__APPLE__) && defined(__MACH__)
// Mac OS
const char* libA = "libA.shared.dylib";
const char* libB = "libB.shared.dylib";
#elif defined(unix) || defined(__unix__) || defined(__unix)
// Unix like OS
const char* libA = "libA.shared.so";
const char* libB = "libB.shared.so";
#else
#error Unknown environment!
#endif
int main(int argc, char **argv)
{
(void)argc;
(void)argv;
void *handle_A;
void *handle_B;
int (*call_A)(void);
int (*call_B)(void);
char *error;
handle_B = dlopen(libB, DLOPEN_FLAGS);
if(handle_B == NULL) {
fprintf(stderr, "%s\n", dlerror());
exit(EXIT_FAILURE);
}
handle_A = dlopen(libA, DLOPEN_FLAGS);
if(handle_A == NULL) {
fprintf(stderr, "%s\n", dlerror());
exit(EXIT_FAILURE);
}
call_A = dlsym(handle_A, "call_A");
error = dlerror();
if(error != NULL) {
fprintf(stderr, "%s\n", error);
exit(EXIT_FAILURE);
}
call_B = dlsym(handle_B, "call_B");
error = dlerror();
if(error != NULL) {
fprintf(stderr, "%s\n", error);
exit(EXIT_FAILURE);
}
printf(" main_AB->");
call_A();
printf(" main_AB->");
call_B();
dlclose(handle_B);
dlclose(handle_A);
return 0;
}