[grilo-plugins] build: Add gperf check for lua-factory source

[Bastien Nocera <hadess src gnome org>]

commit 46eb24609a7a3c805881e794c1e43ab3d2802050
Author: vrishab <gnome vrb gmail com>
Date:   Sun Nov 27 05:47:21 2016 +0530

    build: Add gperf check for lua-factory source
    
    https://bugzilla.gnome.org/show_bug.cgi?id=770959

 configure.ac |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 358d100..c2e6e23 100644
--- a/configure.ac
+++ b/configure.ac
@@ -187,6 +187,8 @@ PKG_CHECK_MODULES([TRACKER_SPARQL], [ ${trackerpkg} ],
                                     HAVE_TRACKER_SPARQL=yes,
                                     HAVE_TRACKER_SPARQL=no)
 
+AC_CHECK_PROG(HAVE_GPERF, gperf, yes, no)
+
 GDBUS_CODEGEN=`${PKG_CONFIG} --variable=gdbus_codegen gio-2.0`
 AC_SUBST(GDBUS_CODEGEN)
 
@@ -677,11 +679,14 @@ AC_ARG_ENABLE(lua_factory,
                         if test "x$HAVE_XML" = "xno"; then
                            AC_MSG_ERROR([libxml-2.0 not found, install it or use --disable-lua-factory])
                         fi
+                        if test "x$HAVE_GPERF" = "xno"; then
+                           AC_MSG_ERROR([gperf not found, install it or use --disable-lua-factory])
+                        fi
                         ;;
                 esac
         ],
         [
-                if test "x$HAVE_LUA" = "xyes" -a "x$HAVE_ARCHIVE" = "xyes" -a "x$HAVE_GRLNET" = "xyes" -a 
"x$HAVE_JSON_GLIB" = "xyes" -a "x$HAVE_XML" = "xyes"; then
+                if test "x$HAVE_LUA" = "xyes" -a "x$HAVE_ARCHIVE" = "xyes" -a "x$HAVE_GRLNET" = "xyes" -a 
"x$HAVE_JSON_GLIB" = "xyes" -a "x$HAVE_XML" = "xyes" -a "x$HAVE_GPERF" = "xyes"; then
                   enable_lua_factory=yes
                 else
                   enable_lua_factory=no