ObjC/ObjC++ compilers are not available for Elbrus, so don't fail

mesonbuild/environment.py

@@ -586,11 +586,19 @@ class Environment:
             self.default_objcpp = ['c++', 'g++']
             self.default_cs = ['csc', 'mcs']
         else:
-            self.default_c = ['cc', 'gcc', 'clang', 'pgcc', 'icc']
-            self.default_cpp = ['c++', 'g++', 'clang++', 'pgc++', 'icpc']
+            if platform.machine().lower() == 'e2k':
+                # There are no objc or objc++ compilers for Elbrus,
+                # and there's no clang which can build binaries for host.
+                self.default_c = ['cc', 'gcc', 'lcc']
+                self.default_cpp = ['c++', 'g++', 'l++']
+                self.default_objc = []
+                self.default_objcpp = []
+            else:
+                self.default_c = ['cc', 'gcc', 'clang', 'pgcc', 'icc']
+                self.default_cpp = ['c++', 'g++', 'clang++', 'pgc++', 'icpc']
+                self.default_objc = ['cc', 'gcc', 'clang']
+                self.default_objcpp = ['c++', 'g++', 'clang++']
             self.default_fortran = ['gfortran', 'flang', 'pgfortran', 'ifort', 'g95']
-            self.default_objc = ['cc', 'gcc', 'clang']
-            self.default_objcpp = ['c++', 'g++', 'clang++']
             self.default_cs = ['mcs', 'csc']
         self.default_d = ['ldc2', 'ldc', 'gdc', 'dmd']
         self.default_java = ['javac']
@@ -1265,7 +1273,7 @@ class Environment:
                 popen_exceptions[' '.join(compiler + arg)] = e
                 continue
             version = search_version(out)
-            if 'Free Software Foundation' in out or ('e2k' in out and 'lcc' in out):
+            if 'Free Software Foundation' in out:
                 defines = self.get_gnu_compiler_defines(compiler)
                 if not defines:
                     popen_exceptions[' '.join(compiler)] = 'no pre-processor defines'

run_unittests.py

@@ -2290,7 +2290,7 @@ class AllPlatformTests(BasePlatformTests):
         ar = mesonbuild.linkers.ArLinker
         lib = mesonbuild.linkers.VisualStudioLinker
         langs = [('c', 'CC'), ('cpp', 'CXX')]
-        if not is_windows():
+        if not is_windows() and platform.machine().lower() != 'e2k':
             langs += [('objc', 'OBJC'), ('objcpp', 'OBJCXX')]
         testdir = os.path.join(self.unit_test_dir, '5 compiler detection')
         env = get_fake_env(testdir, self.builddir, self.prefix)