Add tests/meson.build and make it adjustable via the build option -Dtests=true

Author: istoph

meson.build

@@ -57,54 +57,6 @@ import('pkgconfig').generate(
   subdirs: ['.']
 )
 
-if not meson.is_subproject()
-
-  catch2_dep = dependency('catch2', required : get_option('system-catch2'))
-  if not catch2_dep.found()
-    catch2_dep = declare_dependency(compile_args: ['-DBUNDLED_CATCH2'])
-  else
-    if catch2_dep.version().version_compare('>=3.0')
-      catch2_dep = [catch2_dep, declare_dependency(compile_args: ['-DCATCH3'])]
-    endif
-  endif
-
-  testlib = static_library('testlib', 'tests/catch_main.cpp', dependencies: [catch2_dep])
-  testdep_socket = []
-  if host_machine.system() == 'sunos'
-    testdep_socket = cxx.find_library('socket')
-  endif
-
-  test_cpp_args = []
-  feraiseexcept_test_code = '''
-#define _GNU_SOURCE
-#include <fenv.h>
-
-int main() {
-    feenableexcept(FE_DIVBYZERO);
-    feraiseexcept(FE_DIVBYZERO);
-}
-'''
-  if cxx.links(feraiseexcept_test_code,
-       name: 'feraiseexcept')
-    test_cpp_args += ['-DTEST_ENABLE_FERAISEEXCEPT']
-  endif
-
-  test_no_opts_cpp_args = []
-
-  # The tests are by necessity made using undefined behavior (after all it needs to test what happens in situations that
-  # are, for good reason, undefined behavior).
-  # To make this a bit more likely to work, just disable link time optimization if possible.
-  if cxx.has_argument('-fno-lto')
-    test_no_opts_cpp_args += ['-fno-lto', '-O0']
-  endif
-
-  verbose_kwargs = {}
-  if meson.version().version_compare('>=0.62')
-    verbose_kwargs += {'verbose': true}
-  endif
-
-  test('tests', executable('tests', 'tests/tests.cpp', link_with: [testlib],
-       dependencies: [posixsignalmanager_dep, qt5_dep, librt, catch2_dep, testdep_socket],
-       cpp_args: test_cpp_args + test_no_opts_cpp_args),
-       kwargs: verbose_kwargs)
+if get_option('tests')
+  subdir('tests')
 endif

meson_options.txt

@@ -1 +1,4 @@
+# SPDX-License-Identifier: BSL-1.0
+
+option('tests', type : 'boolean', value : true)
 option('system-catch2', type : 'feature', value : 'disabled')

tests/meson.build

@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: BSL-1.0
+
+if not meson.is_subproject()
+
+  catch2_dep = dependency('catch2', required : get_option('system-catch2'))
+  if not catch2_dep.found()
+    catch2_dep = declare_dependency(compile_args: ['-DBUNDLED_CATCH2'])
+  else
+    if catch2_dep.version().version_compare('>=3.0')
+      catch2_dep = [catch2_dep, declare_dependency(compile_args: ['-DCATCH3'])]
+    endif
+  endif
+
+  testlib = static_library('testlib', 'catch_main.cpp', dependencies: [catch2_dep])
+  testdep_socket = []
+  if host_machine.system() == 'sunos'
+    testdep_socket = cxx.find_library('socket')
+  endif
+
+  test_cpp_args = []
+  feraiseexcept_test_code = '''
+#define _GNU_SOURCE
+#include <fenv.h>
+
+int main() {
+    feenableexcept(FE_DIVBYZERO);
+    feraiseexcept(FE_DIVBYZERO);
+}
+'''
+  if cxx.links(feraiseexcept_test_code,
+       name: 'feraiseexcept')
+    test_cpp_args += ['-DTEST_ENABLE_FERAISEEXCEPT']
+  endif
+
+  test_no_opts_cpp_args = []
+
+  # The tests are by necessity made using undefined behavior (after all it needs to test what happens in situations that
+  # are, for good reason, undefined behavior).
+  # To make this a bit more likely to work, just disable link time optimization if possible.
+  if cxx.has_argument('-fno-lto')
+    test_no_opts_cpp_args += ['-fno-lto', '-O0']
+  endif
+
+  verbose_kwargs = {}
+  if meson.version().version_compare('>=0.62')
+    verbose_kwargs += {'verbose': true}
+  endif
+
+  test('tests', executable('tests', 'tests.cpp', link_with: [testlib],
+       dependencies: [posixsignalmanager_dep, qt5_dep, librt, catch2_dep, testdep_socket],
+       cpp_args: test_cpp_args + test_no_opts_cpp_args),
+       kwargs: verbose_kwargs)
+endif