llvm: Add an option to statically link libstdc++

The goal of the snapshot bots is to produce binaries which can run in as many
locations as possible. Currently we build on Centos 6 for this reason, but with
LLVM's update to C++11, this reduces the number of platforms that we could
possibly run on.

This adds a --enable-llvm-static-stdcpp option to the ./configure script for
Rust which will enable building a librustc with a static dependence on
libstdc++. This normally isn't necessary, but this option can be used on the
snapshot builders in order to continue to make binaries which should be able to
run in as many locations as possible.

1 files changed, 10 insertions, 3 deletions

diff --git a/src/etc/mklldeps.py b/src/etc/mklldeps.py
index 364564168a5..f745f5d61cb 100644
--- a/src/etc/mklldeps.py
+++ b/src/etc/mklldeps.py
@@ -11,11 +11,14 @@
 import os
 import sys
 import subprocess
+import itertools
+from os import path
 
 f = open(sys.argv[1], 'wb')
 
 components = sys.argv[2].split(' ')
 components = [i for i in components if i]  # ignore extra whitespaces
+enable_static = sys.argv[3]
 
 f.write("""// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
@@ -41,7 +44,7 @@ def run(args):
         sys.exit(1)
     return out
 
-for llconfig in sys.argv[3:]:
+for llconfig in sys.argv[4:]:
     f.write("\n")
 
     out = run([llconfig, '--host-target'])
@@ -94,9 +97,13 @@ for llconfig in sys.argv[3:]:
 
     # C++ runtime library
     out = run([llconfig, '--cxxflags'])
-    if 'stdlib=libc++' in out:
-        f.write("#[link(name = \"c++\")]\n")
+    if enable_static == '1':
+      assert('stdlib=libc++' not in out)
+      f.write("#[link(name = \"stdc++\", kind = \"static\")]\n")
     else:
+      if 'stdlib=libc++' in out:
+        f.write("#[link(name = \"c++\")]\n")
+      else:
         f.write("#[link(name = \"stdc++\")]\n")
 
     # Attach everything to an extern block