deal with DLL mess for OpenSSL test

tests/t_hash_sha256_vs_openssl.nim

@@ -6,16 +6,42 @@ import
   # Third-party
   stew/byteutils
 
+# Deal with platform mess
+# --------------------------------------------------------------------
+when defined(windows):
+  when sizeof(int) == 8:
+    const DLLSSLName* = "(libssl-1_1-x64|ssleay64|libssl64).dll"
+  else:
+    const DLLSSLName* = "(libssl-1_1|ssleay32|libssl32).dll"
+else:
+  when defined(macosx):
+    const versions = "(.1.1|.38|.39|.41|.43|.44|.45|.46|.47|.48|.10|.1.0.2|.1.0.1|.1.0.0|.0.9.9|.0.9.8|)"
+  else:
+    const versions = "(.1.1|.1.0.2|.1.0.1|.1.0.0|.0.9.9|.0.9.8|.48|.47|.46|.45|.44|.43|.41|.39|.38|.10|)"
+
+  when defined(macosx):
+    const DLLSSLName* = "libssl" & versions & ".dylib"
+  elif defined(genode):
+    const DLLSSLName* = "libssl.lib.so"
+  else:
+    const DLLSSLName* = "libssl.so" & versions
+
+# OpenSSL wrapper
+# --------------------------------------------------------------------
+
 proc SHA256[T: byte|char](
        msg: openarray[T],
        digest: ptr array[32, byte] = nil
-     ): ptr array[32, byte] {.cdecl, dynlib: "libssl.so", importc.}
+     ): ptr array[32, byte] {.cdecl, dynlib: DLLSSLName, importc.}
 
 proc SHA256_OpenSSL[T: byte|char](
        digest: var array[32, byte],
        s: openarray[T]) =
   discard SHA256(s, digest.addr)
 
+# Test
+# --------------------------------------------------------------------
+
 echo "\n------------------------------------------------------\n"
 const SmallSizeIters = 128
 const LargeSizeIters =  10