From 890a93bbcdf2a933ec5636ed7a9b38cd62c75c04 Mon Sep 17 00:00:00 2001
From: h-denpo <57649496+h-denpo@users.noreply.github.com>
Date: Mon, 1 Mar 2021 17:06:08 +0900
Subject: [PATCH] gchp: patch for aarch64 (#22010)

---
 .../builtin/packages/gchp/for_aarch64.patch   | 24 +++++++++++++++++++
 .../repos/builtin/packages/gchp/package.py    |  3 +++
 2 files changed, 27 insertions(+)
 create mode 100644 var/spack/repos/builtin/packages/gchp/for_aarch64.patch

diff --git a/var/spack/repos/builtin/packages/gchp/for_aarch64.patch b/var/spack/repos/builtin/packages/gchp/for_aarch64.patch
new file mode 100644
index 0000000000..53af837784
--- /dev/null
+++ b/var/spack/repos/builtin/packages/gchp/for_aarch64.patch
@@ -0,0 +1,24 @@
+diff -uprN spack-src.org/ESMA_cmake/GNU.cmake spack-src/ESMA_cmake/GNU.cmake
+--- spack-src.org/ESMA_cmake/GNU.cmake  2021-02-25 11:28:42.856054566 +0900
++++ spack-src/ESMA_cmake/GNU.cmake      2021-02-25 10:38:06.556356960 +0900
+@@ -125,7 +125,7 @@ set (GEOS_Fortran_Debug_FPE_Flags "${com
+
+ # GEOS Release
+ # ------------
+-set (GEOS_Fortran_Release_Flags "${FOPT3} -march=westmere -mtune=generic -funroll-loops ${DEBINFO}")
++set (GEOS_Fortran_Release_Flags "${FOPT3} -funroll-loops ${DEBINFO}")
+ set (GEOS_Fortran_Release_FPE_Flags "${common_Fortran_fpe_flags}")
+
+ # GEOS Vectorize
+diff -uprN spack-src.org/src/GCHP_GridComp/HEMCO_GridComp/HEMCO/CMakeLists.txt spack-src/src/GCHP_GridComp/HEMCO_GridComp/HEMCO/CMakeLists.txt
+--- spack-src.org/src/GCHP_GridComp/HEMCO_GridComp/HEMCO/CMakeLists.txt 2021-02-25 11:33:57.897033867 +0900
++++ spack-src/src/GCHP_GridComp/HEMCO_GridComp/HEMCO/CMakeLists.txt     2021-02-25 11:22:06.224802880 +0900
+@@ -64,7 +64,7 @@ set(HEMCO_Fortran_FLAGS_DEBUG_Intel
+
+ set(HEMCO_Fortran_FLAGS_GNU
+    -cpp -w -std=legacy -fautomatic -fno-align-commons -fconvert=big-endian
+-   -fno-range-check -mcmodel=medium -fbacktrace -g -DLINUX_GFORTRAN
++   -fno-range-check -mcmodel=small -fbacktrace -g -DLINUX_GFORTRAN
+    -ffree-line-length-none
+    CACHE STRING "HEMCO compiler flags for all build types with GNU compilers"
+ )
diff --git a/var/spack/repos/builtin/packages/gchp/package.py b/var/spack/repos/builtin/packages/gchp/package.py
index acbc3786e3..cd2bd3d44b 100644
--- a/var/spack/repos/builtin/packages/gchp/package.py
+++ b/var/spack/repos/builtin/packages/gchp/package.py
@@ -17,6 +17,9 @@ class Gchp(CMakePackage):
 
     version('13.0.0-rc.0', git='https://github.com/geoschem/GCHP.git',
             commit='4bd15316faf4e5f06517d3a6b1df1986b1126d90',  submodules=True)
+
+    patch('for_aarch64.patch', when='target=aarch64:')
+
     # NOTE: Post-13.0.0-rc.0 versions will have fix that
     # allows these ESMF variants to be enabled
     depends_on('esmf@8.0.1: -lapack -pio -pnetcdf -xerces')