packages/musl (#12247)

* new musl package

var/spack/repos/builtin/packages/musl/package.py

@@ -0,0 +1,43 @@
+# Copyright 2013-2019 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack import *
+
+
+class Musl(Package):
+    """Musl is a libc, an implementation of the standard library
+    functionality described in the ISO C and POSIX standards, plus common
+    extensions, intended for use on Linux-based systems. Whereas the kernel
+    (Linux) governs access to hardware, memory, filesystems, and the
+    privileges for accessing these resources, the C library is responsible
+    for providing the actual C function interfaces userspace applications
+    see, and for constructing higher-level buffered stdio, memory
+    allocation management, thread creation and synchronization operations,
+    and so on using the lower-level interfaces the kernel provides, as well
+    as for implementing pure library routines of the C language like
+    strstr, snprintf, strtol, exp, sqrt, etc.
+
+    Musl is a new general-purpose implementation of the C library. It is
+    lightweight, fast, simple, free, and aims to be correct in the sense of
+    standards-conformance and safety."""
+
+    homepage = "https://www.musl-libc.org"
+    url      = "https://www.musl-libc.org/releases/musl-1.1.23.tar.gz"
+
+    version('1.1.23', sha256='8a0feb41cef26c97dde382c014e68b9bb335c094bbc1356f6edaaf6b79bd14aa')
+    version('1.1.22', sha256='8b0941a48d2f980fd7036cfbd24aa1d414f03d9a0652ecbd5ec5c7ff1bee29e3')
+    version('1.1.21', sha256='c742b66f6f49c9e5f52f64d8b79fecb5a0f6e0203fca176c70ca20f6be285f44')
+    version('1.1.20', sha256='44be8771d0e6c6b5f82dd15662eb2957c9a3173a19a8b49966ac0542bbd40d61')
+
+    phases = ['configure', 'build', 'install']
+
+    def configure(self, spec, prefix):
+        configure('--prefix={0}'.format(prefix))
+
+    def build(self, spec, prefix):
+        make()
+
+    def install(self, spec, prefix):
+        make('install')