meson: add tests build option to enable/disable unit tests

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>

libvirt.spec.in

@@ -1185,6 +1185,7 @@ export SOURCE_DATE_EPOCH=$(stat --printf='%Y' %{_specdir}/%{name}.spec)
            -Dexpensive_tests=enabled \
            -Dinit_script=systemd \
            -Ddocs=enabled \
+           -Dtests=enabled \
            %{?arg_login_shell}
 
 %meson_build

meson.build

@@ -2197,7 +2197,10 @@ subdir('src')
 
 subdir('tools')
 
-subdir('tests')
+build_tests = not get_option('tests').disabled()
+if build_tests
+  subdir('tests')
+endif
 
 subdir('examples')
 
@@ -2432,6 +2435,7 @@ misc_summary = {
   'Use -Werror': cc_flags.contains('-Werror'),
   'Warning Flags': supported_cc_flags,
   'docs': gen_docs,
+  'tests': build_tests,
   'DTrace': conf.has('WITH_DTRACE_PROBES'),
   'firewalld': conf.has('WITH_FIREWALLD'),
   'firewalld-zone': conf.has('WITH_FIREWALLD_ZONE'),

meson_options.txt

@@ -8,6 +8,7 @@ option('test_coverage', type: 'boolean', value: false, description: 'turn on cod
 option('git_werror', type: 'feature', value: 'auto', description: 'use -Werror if building from GIT')
 option('rpath', type: 'feature', value: 'auto', description: 'whether to include rpath information in installed binaries and libraries')
 option('docs', type: 'feature', value: 'auto', description: 'whether to generate documentation')
+option('tests', type: 'feature', value: 'auto', description: 'whether to build tests')
 
 
 # build dependencies options