From 9b361bea5a9eeb20afb1e28135f950ac5f00b1ea Mon Sep 17 00:00:00 2001
From: Justin S <3630356+codeandkey@users.noreply.github.com>
Date: Fri, 12 Jul 2019 18:50:04 -0500
Subject: r package: add rmath variant for standalone rmath library (#11693)

---
 var/spack/repos/builtin/packages/r/package.py | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/var/spack/repos/builtin/packages/r/package.py b/var/spack/repos/builtin/packages/r/package.py
index eb5a6f4a8f..65276d9269 100644
--- a/var/spack/repos/builtin/packages/r/package.py
+++ b/var/spack/repos/builtin/packages/r/package.py
@@ -49,6 +49,8 @@ class R(AutotoolsPackage):
             description='Enable X11 support (call configure --with-x)')
     variant('memory_profiling', default=False,
             description='Enable memory profiling')
+    variant('rmath', default=False,
+            description='Build standalone Rmath library')
 
     # Virtual dependencies
     depends_on('blas', when='+external-lapack')
@@ -89,6 +91,18 @@ class R(AutotoolsPackage):
     def etcdir(self):
         return join_path(prefix, 'rlib', 'R', 'etc')
 
+    @run_after('build')
+    def build_rmath(self):
+        if '+rmath' in self.spec:
+            with working_dir('src/nmath/standalone'):
+                make()
+
+    @run_after('install')
+    def install_rmath(self):
+        if '+rmath' in self.spec:
+            with working_dir('src/nmath/standalone'):
+                make('install')
+
     def configure_args(self):
         spec   = self.spec
         prefix = self.prefix
-- 
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