From 778dddc523307a180831f9d8d2e8942075d8e920 Mon Sep 17 00:00:00 2001
From: Satish Balay <balay@mcs.anl.gov>
Date: Fri, 18 Nov 2022 12:34:27 -0600
Subject: pflotran: add "rxn" variant (#33995)

---
 var/spack/repos/builtin/packages/pflotran/package.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/var/spack/repos/builtin/packages/pflotran/package.py b/var/spack/repos/builtin/packages/pflotran/package.py
index 6a042497b9..7e57d2f941 100644
--- a/var/spack/repos/builtin/packages/pflotran/package.py
+++ b/var/spack/repos/builtin/packages/pflotran/package.py
@@ -25,6 +25,8 @@ class Pflotran(AutotoolsPackage):
     version("xsdk-0.4.0", commit="c851cbc94fc56a32cfdb0678f3c24b9936a5584e")
     version("xsdk-0.3.0", branch="release/xsdk-0.3.0")
 
+    variant("rxn", default=False, description="Use inbuilt reaction code, useful with cray ftn")
+
     depends_on("mpi")
     depends_on("hdf5@1.8.12:+mpi+fortran+hl")
     depends_on("petsc@main:+hdf5+metis", when="@develop")
@@ -35,6 +37,13 @@ class Pflotran(AutotoolsPackage):
     depends_on("petsc@3.10:+hdf5+metis", when="@xsdk-0.4.0")
     depends_on("petsc@3.8.0:+hdf5+metis", when="@xsdk-0.3.0")
 
+    def build(self, spec, prefix):
+        if spec.satisfies("+rxn"):
+            with working_dir("src/pflotran"):
+                make("pflotran_rxn")
+        else:
+            make("all")
+
     @property
     def parallel(self):
         return self.spec.satisfies("@xsdk-0.4.0:")
-- 
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