cmake HAVE_WEAK_GETAUXVAL examples

bitcoin-sv/bitcoin-sv src/leveldb/crc32c/CMakeLists.txt :172 

check_cxx_source_compiles("
unsigned long getauxval(unsigned long type) __attribute__((weak));
#define AT_HWCAP 16

int main() {
  getauxval(AT_HWCAP);
  return 0;
}
" HAVE_WEAK_GETAUXVAL)

peercoin/peercoin src/crc32c/CMakeLists.txt :172 

check_cxx_source_compiles("
unsigned long getauxval(unsigned long type) __attribute__((weak));
#define AT_HWCAP 16

int main() {
  getauxval(AT_HWCAP);
  return 0;
}
" HAVE_WEAK_GETAUXVAL)

AXErunners/axe src/crc32c/CMakeLists.txt :172 

check_cxx_source_compiles("
unsigned long getauxval(unsigned long type) __attribute__((weak));
#define AT_HWCAP 16

int main() {
  getauxval(AT_HWCAP);
  return 0;
}
" HAVE_WEAK_GETAUXVAL)