Fix for openjdk to disable tagged pointers in Termux on Android 12+

libdisable-tagged-pointer.c

// C code to disable tagged pointers in Termux.
// Compile and add the path to LD_PRELOAD.
// See https://github.com/termux/termux-packages/issues/7332#issuecomment-1078588433
// for more info.

#include <android/log.h>
void __attribute__((constructor)) disable_tagged_pointer_hook() {
#ifndef __ANDROID_SDK__
  __android_log_print(ANDROID_LOG_INFO, "DEBUG", "undefined __ANDROID_SDK__");
#elif __ANDROID_SDK__ >= 31 // ANDROID 12
  extern int mallopt(int param, int value);
  mallopt(-204, 0);
#elif __ANDROID_SDK__ >= 30 // ANDROID 11
  int tmp = 0;
  extern int android_mallopt(int opcode, void *arg, size_t arg_size);
  android_mallopt(8, &tmp, sizeof(tmp));
#else
  __android_log_print(ANDROID_LOG_INFO, "DEBUG", "__ANDROID_SDK__: %i", __ANDROID_SDK__);
#endif
}