From 7d847f4dc4f8895d57e492c11cfd7c3fbb794945 Mon Sep 17 00:00:00 2001
From: Todd Gamblin <tgamblin@llnl.gov>
Date: Sat, 5 Mar 2016 15:14:21 -0800
Subject: Minor tweaks to m4 -- be sure to add sigsegv args explicitly.

---
 var/spack/repos/builtin/packages/m4/package.py | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/var/spack/repos/builtin/packages/m4/package.py b/var/spack/repos/builtin/packages/m4/package.py
index 9d522dfccf..d6829dbcd4 100644
--- a/var/spack/repos/builtin/packages/m4/package.py
+++ b/var/spack/repos/builtin/packages/m4/package.py
@@ -12,6 +12,12 @@ class M4(Package):
     depends_on('libsigsegv', when='+sigsegv')
 
     def install(self, spec, prefix):
-        configure("--prefix=%s" % prefix)
+        configure_args = []
+        if 'libsigsegv' in spec:
+            configure_args.append('--with-libsigsegv-prefix=%s' % spec['libsigsegv'].prefix)
+        else:
+            configure_args.append('--without-libsigsegv-prefix')
+
+        configure("--prefix=%s" % prefix, *configure_args)
         make()
         make("install")
-- 
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