Reference:	https://cgit.freebsd.org/ports/commit/?id=f08b67611f0b19c0ee8d9053ee4d22e09b03f2b1

--- aws-crt-ffi/crt/aws-lc/crypto/fipsmodule/cpucap/cpu_ppc64le.c.orig	2023-10-20 20:00:18 UTC
+++ aws-crt-ffi/crt/aws-lc/crypto/fipsmodule/cpucap/cpu_ppc64le.c
@@ -27,7 +27,11 @@
 extern uint8_t OPENSSL_cpucap_initialized;
 
 void OPENSSL_cpuid_setup(void) {
+#if defined(__linux__)
   OPENSSL_ppc64le_hwcap2 = getauxval(AT_HWCAP2);
+#elif defined(__FreeBSD__)
+  elf_aux_info(AT_HWCAP2, &OPENSSL_ppc64le_hwcap2, sizeof(OPENSSL_ppc64le_hwcap2));
+#endif
   OPENSSL_cpucap_initialized = 1;
 }