From 64766d975490a782225b23e9adfe69cecf873266 Mon Sep 17 00:00:00 2001
From: Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
Date: Thu, 30 Jul 2020 02:13:19 +0200
Subject: [PATCH] common: build Lemon grammar for libeval_compiler only when
 Lemon is installed

---
 common/CMakeLists.txt | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/common/CMakeLists.txt b/common/CMakeLists.txt
index 82e468c398..771c64ee0a 100644
--- a/common/CMakeLists.txt
+++ b/common/CMakeLists.txt
@@ -435,8 +435,13 @@ target_include_directories( common PRIVATE
 
 add_dependencies( common libcontext )
 add_dependencies( common version_header )
-add_dependencies( common libeval_grammar )
-add_dependencies( common libeval_grammar2 )
+
+find_program(LEMON lemon)
+
+if( LEMON )
+    add_dependencies( common libeval_grammar )
+    add_dependencies( common libeval_grammar2 )
+endif()
 
 target_link_libraries( common
     kimath