[libvirt] [PATCH v2 01/20] build: mandate use of a build dir != src dir

[Pavel Hrdina]

From: Daniel P. Berrangé <berrange at redhat.com>

Historically we've allowed builds in the main src dir, but meson does
not support this. Explicitly force separate build dir in autotools to
align with meson. We must re-enable dependency tracking which the RPM
%configure macro turns off. Without this, the build dir doesn't get
the source directory tree mirrored.

Signed-off-by: Daniel P. Berrangé <berrange at redhat.com>
---

Notes:
    New in v2.

 configure.ac    |  6 ++++++
 libvirt.spec.in | 10 +++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 8b53b6ada9..476bba2800 100644
--- a/configure.ac
+++ b/configure.ac
@@ -17,6 +17,12 @@ dnl License along with this library.  If not, see
 dnl <http://www.gnu.org/licenses/>.
 
 AC_INIT([libvirt], [5.9.0], [libvir-list at redhat.com], [], [https://libvirt.org])
+
+if test $srcdir = "."
+then
+  AC_MSG_ERROR([Build directory must be different from source directory])
+fi
+
 AC_CONFIG_SRCDIR([src/libvirt.c])
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_HEADERS([config.h])
diff --git a/libvirt.spec.in b/libvirt.spec.in
index dcad08cb5f..723ced3535 100644
--- a/libvirt.spec.in
+++ b/libvirt.spec.in
@@ -1163,7 +1163,13 @@ export SOURCE_DATE_EPOCH=$(stat --printf='%Y' %{_specdir}/%{name}.spec)
 %endif
 
 rm -f po/stamp-po
-%configure --with-runstatedir=%{_rundir} \
+
+%define _configure ../configure
+mkdir %{_vpath_builddir}
+cd %{_vpath_builddir}
+
+%configure --enable-dependency-tracking \
+           --with-runstatedir=%{_rundir} \
            %{?arg_qemu} \
            %{?arg_openvz} \
            %{?arg_lxc} \
@@ -1232,6 +1238,7 @@ rm -fr %{buildroot}
 
 export SOURCE_DATE_EPOCH=$(stat --printf='%Y' %{_specdir}/%{name}.spec)
 
+cd %{_vpath_builddir}
 %make_install %{?_smp_mflags} SYSTEMD_UNIT_DIR=%{_unitdir} V=1
 
 rm -f $RPM_BUILD_ROOT%{_libdir}/*.la
@@ -1313,6 +1320,7 @@ mv $RPM_BUILD_ROOT%{_datadir}/systemtap/tapset/libvirt_qemu_probes.stp \
 %endif
 
 %check
+cd %{_vpath_builddir}
 if ! make %{?_smp_mflags} check VIR_TEST_DEBUG=1
 then
   cat test-suite.log || true
-- 
2.21.0