Support mbedtls, an alternative SSL library

var/spack/packages/mbedtls/package.py

@@ -0,0 +1,20 @@
+from spack import *
+
+class Mbedtls(Package):
+    """
+    mbed TLS (formerly known as PolarSSL) makes it trivially easy for developers to include cryptographic and SSL/TLS capabilities in their (embedded) products, facilitating this functionality with a minimal coding footprint.
+    """
+    homepage = "https://tls.mbed.org"
+    url      = "https://github.com/ARMmbed/mbedtls/archive/mbedtls-2.2.1.tar.gz"
+
+    version('2.2.1' , '73a38f96898d6d03e32f55dd9f9a67be')
+    version('2.2.0' , 'eaf4586c1ef93ae872e606b6c1203942')
+    version('2.1.4' , '40cdf67b6c6d92c9cbcfd552d39ea3ae')
+    version('2.1.3' , '7eb4cf1dfa68578a2c8dbd0b6fa752dd')
+    version('1.3.16', '4144d7320c691f721aeb9e67a1bc38e0')
+
+    def install(self, spec, prefix):
+        cmake('.', *std_cmake_args)
+
+        make()
+        make("install")