Add missing "build" folder (was gitignored before)

pmb/build/crosscompiler.py

@@ -0,0 +1,32 @@
+"""
+Copyright 2017 Oliver Smith
+
+This file is part of pmbootstrap.
+
+pmbootstrap is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+pmbootstrap is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with pmbootstrap.  If not, see <http://www.gnu.org/licenses/>.
+"""
+import pmb.config
+import fnmatch
+
+
+def init(args, arch):
+    packages = ["gcc-" + arch, "ccache-cross-symlinks"]
+    pmb.chroot.apk.install(args, packages)
+
+
+def native_chroot(args, pkgname):
+    for pattern in pmb.config.crosscompile_supported:
+        if fnmatch.fnmatch(pkgname, pattern):
+            return True
+    return False