unittests: move get_convincing_fake_env_and_cc to run_tests.py

run_tests.py

@@ -40,7 +40,7 @@ from mesonbuild import mesonlib
 from mesonbuild import mesonmain
 from mesonbuild import mtest
 from mesonbuild import mlog
-from mesonbuild.environment import Environment, detect_ninja
+from mesonbuild.environment import Environment, detect_ninja, detect_machine_info
 from mesonbuild.coredata import backendlist, version as meson_version
 from mesonbuild.mesonlib import OptionKey, setup_vsenv
 
@@ -153,6 +153,17 @@ def get_fake_env(sdir='', bdir=None, prefix='', opts=None):
     env.machines.host.cpu_family = 'x86_64' # Used on macOS inside find_library
     return env
 
+def get_convincing_fake_env_and_cc(bdir, prefix):
+    '''
+    Return a fake env and C compiler with the fake env
+    machine info properly detected using that compiler.
+    Useful for running compiler checks in the unit tests.
+    '''
+    env = get_fake_env('', bdir, prefix)
+    cc = compilers.detect_c_compiler(env, mesonlib.MachineChoice.HOST)
+    # Detect machine info
+    env.machines.host = detect_machine_info({'c':cc})
+    return (env, cc)
 
 Backend = Enum('Backend', 'ninja vs xcode')
 

unittests/allplatformstests.py

@@ -60,7 +60,7 @@ from mesonbuild.scripts import destdir_join
 from mesonbuild.wrap.wrap import PackageDefinition, WrapException
 
 from run_tests import (
-    Backend, exe_suffix, get_fake_env
+    Backend, exe_suffix, get_fake_env, get_convincing_fake_env_and_cc
 )
 
 from .baseplatformtests import BasePlatformTests
@@ -1546,23 +1546,12 @@ class AllPlatformTests(BasePlatformTests):
             self.build()
             self.run_tests()
 
-    def get_convincing_fake_env_and_cc(self) -> None:
-        '''
-        Return a fake env and C compiler with the fake env
-        machine info properly detected using that compiler.
-        '''
-        env = get_fake_env('', self.builddir, self.prefix)
-        cc = detect_c_compiler(env, MachineChoice.HOST)
-        # Detect machine info
-        env.machines.host = mesonbuild.environment.detect_machine_info({'c':cc})
-        return (env, cc)
-
     def test_underscore_prefix_detection_list(self) -> None:
         '''
         Test the underscore detection hardcoded lookup list
         against what was detected in the binary.
         '''
-        env, cc = self.get_convincing_fake_env_and_cc()
+        env, cc = get_convincing_fake_env_and_cc(self.builddir, self.prefix)
         expected_uscore = cc._symbols_have_underscore_prefix_searchbin(env)
         list_uscore = cc._symbols_have_underscore_prefix_list(env)
         if list_uscore is not None:
@@ -1575,7 +1564,7 @@ class AllPlatformTests(BasePlatformTests):
         Test the underscore detection based on compiler-defined preprocessor macro
         against what was detected in the binary.
         '''
-        env, cc = self.get_convincing_fake_env_and_cc()
+        env, cc = get_convincing_fake_env_and_cc(self.builddir, self.prefix)
         expected_uscore = cc._symbols_have_underscore_prefix_searchbin(env)
         define_uscore = cc._symbols_have_underscore_prefix_define(env)
         if define_uscore is not None: