From 79a1de2f17094e7e5592bed8cd9040bff9f43cf5 Mon Sep 17 00:00:00 2001
From: Erik Schnetter <schnetter@gmail.com>
Date: Sat, 9 Jan 2016 10:47:31 -0500
Subject: [PATCH] Add a patch to prevent Julia running out of virtual memory

---
 var/spack/packages/julia/gc.patch   | 11 +++++++++++
 var/spack/packages/julia/package.py |  2 ++
 2 files changed, 13 insertions(+)
 create mode 100644 var/spack/packages/julia/gc.patch

diff --git a/var/spack/packages/julia/gc.patch b/var/spack/packages/julia/gc.patch
new file mode 100644
index 00000000000..6db69c6c1b0
--- /dev/null
+++ b/var/spack/packages/julia/gc.patch
@@ -0,0 +1,11 @@
+--- julia/src/gc.c
++++ julia/src/gc.c
+@@ -162,7 +162,7 @@
+ // A region is contiguous storage for up to REGION_PG_COUNT naturally aligned GC_PAGE_SZ pages
+ // It uses a very naive allocator (see malloc_page & free_page)
+ #if defined(_P64) && !defined(_COMPILER_MICROSOFT_)
+-#define REGION_PG_COUNT 16*8*4096 // 8G because virtual memory is cheap
++#define REGION_PG_COUNT 8*4096 // 512M
+ #else
+ #define REGION_PG_COUNT 8*4096 // 512M
+ #endif
diff --git a/var/spack/packages/julia/package.py b/var/spack/packages/julia/package.py
index 80a58ab7457..d978842d9c9 100644
--- a/var/spack/packages/julia/package.py
+++ b/var/spack/packages/julia/package.py
@@ -8,6 +8,8 @@ class Julia(Package):
 
     version('0.4.2', 'ccfeb4f4090c8b31083f5e1ccb03eb06')
 
+    patch('gc.patch')
+
     # Build-time dependencies
     depends_on("cmake @2.8:")
     # depends_on("awk")