Add comment about SOURCE_DATE_EPOCH

OBS-URL: https://build.opensuse.org/package/show/science:HPC/openmpi4?expand=0&rev=13

openmpi4.spec

@@ -1,5 +1,5 @@
 #
-# spec file for package openmpi4
+# spec file for package %{package_name}%{?testsuite:-testsuite}
 #
 # Copyright (c) 2021 SUSE LLC
 # Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
@@ -162,7 +162,7 @@ BuildRequires:  gcc-c++
 BuildRequires:  gcc-fortran
 BuildRequires:  mpi-selector
 Requires:       mpi-selector
-Requires(preun): mpi-selector
+Requires(preun):mpi-selector
 Requires:       %{package_name}-libs = %{version}
 %else
 BuildRequires:  %{compiler_family}%{?c_f_ver}-compilers-hpc-macros-devel
@@ -209,7 +209,7 @@ Requires:       openssh
 %define mpi_bindir %hpc_bindir
 %define mpi_libdir %hpc_libdir
 %define mpi_datadir %hpc_datadir
-%define mpi_helpdir %{mpi_datadir}/openmpi 
+%define mpi_helpdir %{mpi_datadir}/openmpi
 %define mpi_includedir %hpc_includedir
 %define mpi_mandir %hpc_mandir
 
@@ -288,7 +288,7 @@ programming API, which is a Partitioned Global Address Space (PGAS)
 abstraction layer providing inter-process communication using
 one-sided communication techniques.
 
-This package provides the development files for Open MPI/OpenSHMEM 
+This package provides the development files for Open MPI/OpenSHMEM
 version %{m_f_ver}, such as wrapper compilers and header files for
 MPI/OpenSHMEM development.
 
@@ -414,6 +414,7 @@ sed -i -e 's/^greek=.*$/greek=%{git_ver}/' -e 's/^repo_rev=.*$/repo_rev=%{versio
 # make build reproducible
 export USER=OBS
 export HOSTNAME=OBS
+# OBS sets SOURCE_DATE_EPOCH
 %global _lto_cflags %{_lto_cflags} -ffat-lto-objects
 %{?with_hpc:%hpc_debug}
 ./autogen.pl --force