Add compile flag to disable compilation of mining code

configure.ac

@@ -82,6 +82,12 @@ AC_ARG_ENABLE([wallet],
   [enable_wallet=$enableval],
   [enable_wallet=yes])
 
+AC_ARG_ENABLE([mining],
+  [AS_HELP_STRING([--enable-mining],
+  [enable mining (default is yes)])],
+  [enable_mining=$enableval],
+  [enable_mining=yes])
+
 AC_ARG_WITH([miniupnpc],
   [AS_HELP_STRING([--with-miniupnpc],
   [enable UPNP (default is yes if libminiupnpc is found)])],
@@ -790,6 +796,16 @@ else
   AC_MSG_RESULT(no)
 fi
 
+dnl enable mining
+AC_MSG_CHECKING([if mining should be enabled])
+if test x$enable_mining != xno; then
+  AC_MSG_RESULT(yes)
+  AC_DEFINE(ENABLE_MINING, 1, [Define to 1 to enable mining functions])
+
+else
+  AC_MSG_RESULT(no)
+fi
+
 dnl enable upnp support
 AC_MSG_CHECKING([whether to build with support for UPnP])
 if test x$have_miniupnpc = xno; then
@@ -881,6 +897,7 @@ AM_CONDITIONAL([TARGET_DARWIN], [test x$TARGET_OS = xdarwin])
 AM_CONDITIONAL([BUILD_DARWIN], [test x$BUILD_OS = xdarwin])
 AM_CONDITIONAL([TARGET_WINDOWS], [test x$TARGET_OS = xwindows])
 AM_CONDITIONAL([ENABLE_WALLET],[test x$enable_wallet = xyes])
+AM_CONDITIONAL([ENABLE_MINING],[test x$enable_mining = xyes])
 AM_CONDITIONAL([ENABLE_TESTS],[test x$BUILD_TEST = xyes])
 AM_CONDITIONAL([ENABLE_QT],[test x$bitcoin_enable_qt = xyes])
 AM_CONDITIONAL([ENABLE_QT_TESTS],[test x$BUILD_TEST_QT = xyes])