commit 50c0033a6c6fcef73a7a5fcbb7c46e077e546ce2
author Douglas Mencken <dougmencken@gmail.com> Mon Feb 12 06:19:56 2018 -0500
committer Daniel Stenberg <daniel@haxx.se> Mon Feb 12 14:16:37 2018 +0100
tree b9e8329ddd292993ca48db92d28bd409628d5116
parent b9e323334d2f8afdb4998d22d16a7643981abc63

sha256: build with OpenSSL < 0.9.8 too

support for SHA-2 was introduced in OpenSSL 0.9.8

Closes #2305

lib/sha256.c

diff --git a/lib/sha256.c b/lib/sha256.c
index cd81c02..776bd28 100644
--- a/lib/sha256.c
+++ b/lib/sha256.c
@@ -27,8 +27,20 @@
 #include "warnless.h"
 #include "curl_sha256.h"
 
+#define USE_OPENSSL_SHA256      0
+
 #if defined(USE_OPENSSL)
 
+#include <openssl/opensslv.h>
+
+#if (OPENSSL_VERSION_NUMBER >= 0x0090800fL)
+#define USE_OPENSSL_SHA256      1
+#endif
+
+#endif
+
+#if USE_OPENSSL_SHA256
+
 /* When OpenSSL is available we use the SHA256-function from OpenSSL */
 #include <openssl/sha.h>