crypto/armcap.c, crypto/ppccap.c: stricter use of getauxval()

[openssl.git] / crypto / ppccap.c

diff --git a/crypto/ppccap.c b/crypto/ppccap.c
index 421476245ee134eb8ed785f95139ade0e79426e6..e50f7574b807ceb545bfd9f179872b4e6350075d 100644 (file)
--- a/crypto/ppccap.c
+++ b/crypto/ppccap.c
@@ -168,16 +168,11 @@ void OPENSSL_altivec_probe(void);
 void OPENSSL_crypto207_probe(void);
 void OPENSSL_madd300_probe(void);
 
-/*
- * Use a weak reference to getauxval() so we can use it if it is available
- * but don't break the build if it is not. Note that this is *link-time*
- * feature detection, not *run-time*. In other words if we link with
- * symbol present, it's expected to be present even at run-time.
- */
-#if defined(__GNUC__) && __GNUC__>=2 && defined(__ELF__)
-extern unsigned long getauxval(unsigned long type) __attribute__ ((weak));
-#else
-static unsigned long (*getauxval) (unsigned long) = NULL;
+#if defined(__GLIBC__) && defined(__GLIBC_PREREQ)
+# if __GLIBC_PREREQ(2, 16)
+#  include <sys/auxv.h>
+#  define OSSL_IMPLEMENT_GETAUXVAL
+# endif
 #endif
 
 /* I wish <sys/auxv.h> was universally available */
@@ -277,7 +272,8 @@ void OPENSSL_cpuid_setup(void)
     }
 #endif
 
-    if (getauxval != NULL) {
+#ifdef OSSL_IMPLEMENT_GETAUXVAL
+    {
         unsigned long hwcap = getauxval(HWCAP);
 
         if (hwcap & HWCAP_FPU) {
@@ -307,6 +303,7 @@ void OPENSSL_cpuid_setup(void)
 
         return;
     }
+#endif
 
     sigfillset(&all_masked);
     sigdelset(&all_masked, SIGILL);