From b5c1e78c3dac1e310d021086dd7608500b6ec1a9 Mon Sep 17 00:00:00 2001
From: Orion Poplawski <orion@nwra.com>
Date: Fri, 13 Aug 2021 21:55:56 -0600
Subject: [PATCH] Try to limit memory usage on arm builds

---
 petsc.spec | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/petsc.spec b/petsc.spec
index 14f7b92..3b0ab88 100644
--- a/petsc.spec
+++ b/petsc.spec
@@ -661,6 +661,10 @@ pushd %{name}-%{version}
 ##
 
 RPM_BUILD_NCPUS="`%{_bindir}/getconf _NPROCESSORS_ONLN`"
+%ifarch %{arm}
+# Likely running out of memory during build
+[ $RPM_BUILD_NCPUS -gt 3 ] && RPM_BUILD_NCPUS=3
+%endif
 make \
  V=1 MAKE_NP=$RPM_BUILD_NCPUS PETSC_DIR=%{_builddir}/%{name}-%{version}/%{name}-%{version} PETSC_ARCH=%{_arch} all
 popd