Make pthread, libcurl and libcurses library checks mandatory or fail.
diff --git a/configure.ac b/configure.ac
index 679b7de..de3153a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -72,11 +72,21 @@ AC_LINK_IFELSE(
found_opencl=0])
LIBS=$SAVED_LIBS
+AC_CHECK_LIB(pthread, pthread_create, ,
+ AC_MSG_ERROR([Could not find pthread library - please install libpthread]))
+PTHREAD_LIBS=-lpthread
+
AC_CHECK_LIB(jansson, json_loads, request_jansson=false, request_jansson=true)
-AC_CHECK_LIB(pthread, pthread_create, PTHREAD_LIBS=-lpthread)
+
+AC_SEARCH_LIBS(addstr, ncurses pdcurses, ,
+ AC_MSG_ERROR([Could not find curses library - please install libncurses-dev or pdcurses-dev]))
+
AC_CHECK_LIB(ncurses, addstr, NCURSES_LIBS=-lncurses)
AC_CHECK_LIB(pdcurses, addstr, PDCURSES_LIBS=-lpdcurses)
+AC_CHECK_LIB(curl, curl_easy_init, ,
+ AC_MSG_ERROR([Could not find curl library - please install libcurl-dev]))
+
AM_CONDITIONAL([WANT_JANSSON], [test x$request_jansson = xtrue])
AM_CONDITIONAL([HAVE_WINDOWS], [test x$have_win32 = xtrue])
AM_CONDITIONAL([HAVE_x86_64], [test x$have_x86_64 = xtrue])