From def42f156d8bd914fa4e291ecc5e89cbc4f71aea Mon Sep 17 00:00:00 2001
From: healther <healther@users.noreply.github.com>
Date: Fri, 3 Mar 2017 15:06:25 +0100
Subject: [PATCH] add flex variant to cscope (#3252)

* add flex variant to cscope

* fixed dependency

* fixed typo
---
 var/spack/repos/builtin/packages/cscope/package.py | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/var/spack/repos/builtin/packages/cscope/package.py b/var/spack/repos/builtin/packages/cscope/package.py
index 73017ffc57..1e39216367 100644
--- a/var/spack/repos/builtin/packages/cscope/package.py
+++ b/var/spack/repos/builtin/packages/cscope/package.py
@@ -33,5 +33,12 @@ class Cscope(AutotoolsPackage):
 
     version('15.8b', '8f9409a238ee313a96f9f87fe0f3b176')
 
-    # Can be configured to use flex (not necessary)
-    # ./configure --with-flex
+    variant('flex', default=False, description="Builds with flex")
+
+    depends_on('flex', when='+flex')
+
+    def configure_args(self):
+        args = []
+        if '+flex' in self.spec:
+            args.append('--with-flex')
+        return args