From 6de97d44342ac2a2856f427c3ac648bb6f50abcc Mon Sep 17 00:00:00 2001
From: Kefu Chai <kchai@redhat.com>
Date: Thu, 4 Mar 2021 12:56:11 +0800
Subject: [PATCH] ceph.spec: prepare for out-of-source build

see also
https://fedoraproject.org/wiki/Changes/CMake_to_do_out-of-source_builds

Signed-off-by: Kefu Chai <kchai@redhat.com>
---
 ceph.spec.in | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/ceph.spec.in b/ceph.spec.in
index bff4eaba3df07..88e5baa0ccabf 100644
--- a/ceph.spec.in
+++ b/ceph.spec.in
@@ -1230,8 +1230,11 @@ export CXXFLAGS=$(echo $RPM_OPT_FLAGS | sed -e 's/-Wp,-D_FORTIFY_SOURCE=2//g')
 
 env | sort
 
-mkdir build
-cd build
+%{?!_vpath_builddir:%global _vpath_builddir %{_target_platform}}
+
+# TODO: drop this step once we can use `cmake -B`
+mkdir -p %{_vpath_builddir}
+pushd %{_vpath_builddir}
 cmake .. \
     -DCMAKE_INSTALL_PREFIX=%{_prefix} \
     -DCMAKE_INSTALL_LIBDIR:PATH=%{_libdir} \
@@ -1319,16 +1322,19 @@ make %{_smp_mflags}
 %make_build
 %endif
 
+popd
+
 %if 0%{with make_check}
 %check
 # run in-tree unittests
-cd build
+pushd %{_vpath_builddir}
 ctest %{_smp_mflags}
+popd
 %endif
 
 
 %install
-pushd build
+pushd %{_vpath_builddir}
 %make_install
 # we have dropped sysvinit bits
 rm -f %{buildroot}/%{_sysconfdir}/init.d/ceph
-- 
2.39.5