Remove memset_s, not implemented on any machine I can test on and

problematic for requiring a special define before the first include of
string.h. Instead optionally call memset via a volatile function
pointer as a faster alternative to byte at a time writes.

Github 42, 45

1 files changed, 6 insertions, 0 deletions

diff --git a/src/build-data/buildh.in b/src/build-data/buildh.in
index 636552a4f..fdb141ffb 100644
--- a/src/build-data/buildh.in
+++ b/src/build-data/buildh.in
@@ -44,6 +44,12 @@
 /* How many bits per limb in a BigInt */
 #define BOTAN_MP_WORD_BITS %{mp_bits}
 
+/*
+If enabled uses memset via volatile function pointer to zero memory,
+otherwise does a byte at a time write via a volatile pointer.
+*/
+#define BOTAN_USE_VOLATILE_MEMSET_FOR_ZERO 1
+
 /* PK key consistency checking toggles */
 #define BOTAN_PUBLIC_KEY_STRONG_CHECKS_ON_LOAD 1
 #define BOTAN_PRIVATE_KEY_STRONG_CHECKS_ON_LOAD 0