Use %make_build macro

https://docs.fedoraproject.org/en-US/packaging-guidelines/#_parallel_make

libocxl.spec

@@ -1,6 +1,6 @@
 Name:           libocxl
 Version:        1.1.0
-Release:        7%{?dist}
+Release:        8%{?dist}
 Summary:        Allows to implement a user-space driver for an OpenCAPI accelerator
 
 License:        ASL 2.0
@@ -40,7 +40,8 @@ developing applications that use %{name}.
 %autosetup -p1
 
 %build
-LDFLAGS="%{build_ldflags}" CFLAGS="%{build_cflags}" make %{?_smp_mflags} V=1
+%set_build_flags
+%make_build
 
 %install
 %make_install PREFIX=%{_prefix}
@@ -59,6 +60,9 @@ LDFLAGS="%{build_ldflags}" CFLAGS="%{build_cflags}" make %{?_smp_mflags} V=1
 %{_pkgdocdir}
 
 %changelog
+* Tue May 11 2021 Timm Bäder <tbaeder@redhat.com> - 1.1.0-8
+- Use %%make_build macro
+
 * Tue Jan 26 2021 Fedora Release Engineering <releng@fedoraproject.org> - 1.1.0-7
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild