diff --git a/_constraints b/_constraints
new file mode 100644
index 0000000..c9d6a5c
--- /dev/null
+++ b/_constraints
@@ -0,0 +1,18 @@
+<constraints>
+  <hardware>
+  <physicalmemory>
+    <size unit="G">5</size>
+  </physicalmemory>
+  </hardware>
+  <overwrite>
+    <conditions>
+      <arch>ppc64</arch>
+      <arch>ppc64le</arch>
+    </conditions>
+    <hardware>
+    <physicalmemory>
+      <size unit="G">7</size>
+    </physicalmemory>
+    </hardware>
+  </overwrite>
+</constraints>
diff --git a/suitesparse.changes b/suitesparse.changes
index 781e6b5..d1d05dc 100644
--- a/suitesparse.changes
+++ b/suitesparse.changes
@@ -1,3 +1,11 @@
+-------------------------------------------------------------------
+Tue Aug 18 15:52:29 UTC 2020 - Michel Normand <normand@linux.vnet.ibm.com>
+
+- Call %limit_build macro in spec to avoid oom build failure
+  for ppc64le and aarch64
+- Add _constraints with default 5GB min physicalmemory
+  and 7GB for ppc64/ppc64le
+
 -------------------------------------------------------------------
 Thu Mar 19 22:49:23 UTC 2020 - Christoph G <foss@grueninger.de>
 
diff --git a/suitesparse.spec b/suitesparse.spec
index 09377c0..609fcfc 100644
--- a/suitesparse.spec
+++ b/suitesparse.spec
@@ -46,6 +46,7 @@ BuildRequires:  cmake
 BuildRequires:  gcc-fortran
 BuildRequires:  lapack-devel
 BuildRequires:  m4
+BuildRequires:  memory-constraints
 BuildRequires:  metis-devel
 BuildRequires:  tbb-devel
 %if %{with openblas}
@@ -579,6 +580,13 @@ rm SPQR/Doc/spqr.pdf
 %patch775418 -p1
 
 %build
+%ifarch ppc64le aarch64
+%define limitbuild 1500
+%limit_build -m %{limitbuild}
+%define JOBS %{jobs}
+%define _lto_cflags -flto=%{jobs}
+%endif
+
 %global _lto_cflags %{_lto_cflags} -ffat-lto-objects
 %if 0%{?suse_version} < 1500
 export CC=gcc-7