cmake: Revert to using self.for_machine instead of MachineChoice.BUILD (fixes #8028)

cross/linux-mingw-w64-32bit.txt

@@ -7,6 +7,7 @@ pkgconfig = '/usr/bin/i686-w64-mingw32-pkg-config'
 windres = '/usr/bin/i686-w64-mingw32-windres'
 exe_wrapper = 'wine'
 ld = '/usr/bin/i686-w64-mingw32-ld'
+cmake = '/usr/bin/cmake'
 
 [properties]
 # Directory that contains 'bin', 'lib', etc

cross/linux-mingw-w64-64bit.txt

@@ -6,6 +6,7 @@ strip = '/usr/bin/x86_64-w64-mingw32-strip'
 pkgconfig = '/usr/bin/x86_64-w64-mingw32-pkg-config'
 windres = '/usr/bin/x86_64-w64-mingw32-windres'
 exe_wrapper = 'wine64'
+cmake = '/usr/bin/cmake'
 
 [properties]
 # Directory that contains 'bin', 'lib', etc

mesonbuild/cmake/interpreter.py

@@ -850,6 +850,7 @@ class CMakeInterpreter:
 
     def configure(self, extra_cmake_options: T.List[str]) -> CMakeExecutor:
         # Find CMake
+        # TODO: Using MachineChoice.BUILD should always be correct here, but also evaluate the use of self.for_machine
         cmake_exe = CMakeExecutor(self.env, '>=3.7', MachineChoice.BUILD)
         if not cmake_exe.found():
             raise CMakeException('Unable to find CMake')

mesonbuild/dependencies/base.py

@@ -1087,10 +1087,11 @@ class CMakeDependency(ExternalDependency):
         # AttributeError exceptions in derived classes
         self.traceparser = None  # type: CMakeTraceParser
 
-        self.cmakebin = CMakeExecutor(environment, CMakeDependency.class_cmake_version, MachineChoice.BUILD, silent=self.silent)
+        # TODO further evaluate always using MachineChoice.BUILD
+        self.cmakebin = CMakeExecutor(environment, CMakeDependency.class_cmake_version, self.for_machine, silent=self.silent)
         if not self.cmakebin.found():
             self.cmakebin = None
-            msg = 'No CMake binary for machine {} not found. Giving up.'.format(MachineChoice.BUILD)
+            msg = 'No CMake binary for machine {} not found. Giving up.'.format(self.for_machine)
             if self.required:
                 raise DependencyException(msg)
             mlog.debug(msg)