Remove compilers from ModuleState object

It doesn't make much sense to have this and not also have
cross-compilers (so any use of this is already pretty suspect as
probably wrong when cross-compiling).

This information is accessible anyhow via environment.coredata.

mesonbuild/interpreter.py

@@ -1633,7 +1633,7 @@ class CompilerHolder(InterpreterObject):
 
 ModuleState = namedtuple('ModuleState', [
     'build_to_src', 'subproject', 'subdir', 'current_lineno', 'environment',
-    'project_name', 'project_version', 'backend', 'compilers', 'targets',
+    'project_name', 'project_version', 'backend', 'targets',
     'data', 'headers', 'man', 'global_args', 'project_args', 'build_machine',
     'host_machine', 'target_machine', 'current_node'])
 
@@ -1668,7 +1668,6 @@ class ModuleHolder(InterpreterObject, ObjectHolder):
             # The backend object is under-used right now, but we will need it:
             # https://github.com/mesonbuild/meson/issues/1419
             backend=self.interpreter.backend,
-            compilers=self.interpreter.build.compilers,
             targets=self.interpreter.build.targets,
             data=self.interpreter.build.data,
             headers=self.interpreter.build.get_headers(),

mesonbuild/modules/cmake.py

@@ -52,7 +52,8 @@ class CmakeModule(ExtensionModule):
         super().__init__(interpreter)
         self.snippets.add('configure_package_config_file')
 
-    def detect_voidp_size(self, compilers, env):
+    def detect_voidp_size(self, env):
+        compilers = env.coredata.compilers
         compiler = compilers.get('c', None)
         if not compiler:
             compiler = compilers.get('cpp', None)
@@ -115,7 +116,7 @@ class CmakeModule(ExtensionModule):
 
         conf = {
             'CVF_VERSION': (version, ''),
-            'CMAKE_SIZEOF_VOID_P': (str(self.detect_voidp_size(state.compilers, state.environment)), '')
+            'CMAKE_SIZEOF_VOID_P': (str(self.detect_voidp_size(state.environment)), '')
         }
         mesonlib.do_conf_file(template_file, version_file, conf, 'meson')
 

mesonbuild/modules/windows.py

@@ -50,7 +50,7 @@ class WindowsModule(ExtensionModule):
         rescomp = ExternalProgram.from_bin_list(state.environment.binaries.host, 'windres')
 
         if not rescomp or not rescomp.found():
-            comp = self.detect_compiler(state.compilers)
+            comp = self.detect_compiler(state.environment.coredata.compilers)
             if comp.id in {'msvc', 'clang-cl', 'intel-cl'}:
                 rescomp = ExternalProgram('rc', silent=True)
             else: