Add workaround to fix build on arm

0001-Drop-real128.patch

@@ -0,0 +1,74 @@
+From 8f0c71281b5dccd70a3f1d4204e3cc6bc7201ceb Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?=
+ <zbyszek@arm03-packager01.cloud.fedoraproject.org>
+Date: Wed, 28 Aug 2019 10:57:55 +0000
+Subject: [PATCH] Drop real128
+
+https://github.com/pmodels/mpich/issues/4005
+---
+ .../fortran/use_mpi_f08/mpi_f08_types.f90     | 24 -------------------
+ 1 file changed, 24 deletions(-)
+
+diff --git a/src/binding/fortran/use_mpi_f08/mpi_f08_types.f90 b/src/binding/fortran/use_mpi_f08/mpi_f08_types.f90
+index f8b0fa811..46bdf6972 100644
+--- a/src/binding/fortran/use_mpi_f08/mpi_f08_types.f90
++++ b/src/binding/fortran/use_mpi_f08/mpi_f08_types.f90
+@@ -248,10 +248,8 @@ interface MPI_Sizeof
+     module procedure MPI_Sizeof_xint64
+     module procedure MPI_Sizeof_xreal32
+     module procedure MPI_Sizeof_xreal64
+-    module procedure MPI_Sizeof_xreal128
+     module procedure MPI_Sizeof_xcomplex32
+     module procedure MPI_Sizeof_xcomplex64
+-    module procedure MPI_Sizeof_xcomplex128
+ end interface
+ 
+ private :: MPI_Sizeof_character
+@@ -263,10 +261,8 @@ private :: MPI_Sizeof_xint32
+ private :: MPI_Sizeof_xint64
+ private :: MPI_Sizeof_xreal32
+ private :: MPI_Sizeof_xreal64
+-private :: MPI_Sizeof_xreal128
+ private :: MPI_Sizeof_xcomplex32
+ private :: MPI_Sizeof_xcomplex64
+-private :: MPI_Sizeof_xcomplex128
+ 
+ contains
+ 
+@@ -350,16 +346,6 @@ subroutine MPI_Sizeof_xreal64 (x, size, ierror)
+     ierror = 0
+ end subroutine MPI_Sizeof_xreal64
+ 
+-subroutine MPI_Sizeof_xreal128 (x, size, ierror)
+-    use,intrinsic :: iso_fortran_env, only: real128
+-    real(real128),dimension(..) :: x
+-    integer, intent(out) :: size
+-    integer, optional,  intent(out) :: ierror
+-
+-    size = storage_size(x)/8
+-    ierror = 0
+-end subroutine MPI_Sizeof_xreal128
+-
+ subroutine MPI_Sizeof_xcomplex32 (x, size, ierror)
+     use,intrinsic :: iso_fortran_env, only: real32
+     complex(real32),dimension(..) :: x
+@@ -380,16 +366,6 @@ subroutine MPI_Sizeof_xcomplex64 (x, size, ierror)
+     ierror = 0
+ end subroutine MPI_Sizeof_xcomplex64
+ 
+-subroutine MPI_Sizeof_xcomplex128 (x, size, ierror)
+-    use,intrinsic :: iso_fortran_env, only: real128
+-    complex(real128),dimension(..) :: x
+-    integer, intent(out) :: size
+-    integer, optional,  intent(out) :: ierror
+-
+-    size = storage_size(x)/8
+-    ierror = 0
+-end subroutine MPI_Sizeof_xcomplex128
+-
+ subroutine MPI_Status_f2f08(f_status, f08_status, ierror)
+     integer, intent(in) :: f_status(MPI_STATUS_SIZE)
+     type(MPI_Status), intent(out) :: f08_status
+-- 
+2.21.0
+

mpich.spec

@@ -10,6 +10,7 @@ Source1:        mpich.macros
 Source2:        mpich.pth.py2
 Source3:        mpich.pth.py3
 Patch0:         mpich-modules.patch
+Patch1:         0001-Drop-real128.patch
 
 BuildRequires:  gcc
 BuildRequires:  gcc-c++
@@ -103,7 +104,13 @@ Requires:       python(abi) = %{python3_version}
 mpich support for Python 3.
 
 %prep
-%autosetup -p1
+%setup
+
+%patch0 -p1
+
+%ifarch %{arm}
+%patch1 -p1
+%endif
 
 %build
 CONFIGURE_OPTS=(