fix for mac

CMakeLists.txt

@@ -312,8 +312,10 @@ ELSE()
   SET (OPENSSL_CONF_TARGET ${CMAKE_CURRENT_BINARY_DIR})
 ENDIF()
 
+    IF(WIN32)
 SET(POST_BUILD_STEP_COMMANDS ${POST_BUILD_STEP_COMMANDS}
      COMMAND ${CMAKE_COMMAND} -E copy_if_different "${OPENSSL_ROOT_DIR}/ssl/openssl.cnf" "${OPENSSL_CONF_TARGET}/openssl.cnf")
+    ENDIF(WIN32)
 
 ADD_CUSTOM_COMMAND(TARGET fc POST_BUILD ${POST_BUILD_STEP_COMMANDS} 
   COMMENT "Copying OpenSSL/ssl/openssl.cnf into target directory."

src/crypto/openssl.cpp

@@ -6,6 +6,7 @@
 
 #include <cstdlib>
 #include <string>
+#include <stdlib.h>
 
 namespace  fc 
 {
@@ -22,7 +23,7 @@ namespace  fc
           {
                std::string varSetting("OPENSSL_CONF=");
                varSetting += _configurationFilePath.to_native_ansi_path();
-            putenv(varSetting.c_str());
+               putenv((char*)varSetting.c_str());
           }
 
           OPENSSL_config(nullptr);