Add missing tools to develop

conan/tools/__init__.py

@@ -1,2 +1,4 @@
+from conans.model.version import Version
+
 CONAN_TOOLCHAIN_ARGS_FILE = "conanbuild.conf"
 CONAN_TOOLCHAIN_ARGS_SECTION = "toolchain"

conan/tools/build/__init__.py

@@ -1 +1,2 @@
 from conan.tools.build.cpu import build_jobs
+from conan.tools.build.cross_building import cross_building

conan/tools/build/cross_building.py

@@ -0,0 +1,20 @@
+
+def cross_building(conanfile=None, skip_x64_x86=False):
+    host_os = conanfile.settings.get_safe("os")
+    host_arch = conanfile.settings.get_safe("arch")
+    build_os = conanfile.settings_build.get_safe('os')
+    build_arch = conanfile.settings_build.get_safe('arch')
+
+    if skip_x64_x86 and host_os is not None and (build_os == host_os) and \
+            host_arch is not None and ((build_arch == "x86_64") and (host_arch == "x86") or
+                                       (build_arch == "sparcv9") and (host_arch == "sparc") or
+                                       (build_arch == "ppc64") and (host_arch == "ppc32")):
+        return False
+
+    if host_os is not None and (build_os != host_os):
+        return True
+    if host_arch is not None and (build_arch != host_arch):
+        return True
+
+    return False
+