Enable explicit_bzero() on OpenBSD
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
diff --git a/library/platform_util.c b/library/platform_util.c
index d525acc..6d4759c 100644
--- a/library/platform_util.c
+++ b/library/platform_util.c
@@ -20,9 +20,10 @@
/*
* Ensure gmtime_r is available even with -std=c99; must be defined before
- * mbedtls_config.h, which pulls in glibc's features.h. Harmless on other platforms.
+ * mbedtls_config.h, which pulls in glibc's features.h. Harmless on other platforms
+ * except OpenBSD, where it stops us accessing explicit_bzero.
*/
-#if !defined(_POSIX_C_SOURCE)
+#if !defined(_POSIX_C_SOURCE) && !defined(__OpenBSD__)
#define _POSIX_C_SOURCE 200112L
#endif
@@ -51,7 +52,7 @@
// Detect platforms known to support explicit_bzero()
#if defined(__GLIBC__) && (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 25)
#define MBEDTLS_PLATFORM_HAS_EXPLICIT_BZERO 1
-#elif defined(__FreeBSD__) && (__FreeBSD_version >= 1100037)
+#elif (defined(__FreeBSD__) && (__FreeBSD_version >= 1100037)) || defined(__OpenBSD__)
#define MBEDTLS_PLATFORM_HAS_EXPLICIT_BZERO 1
#endif