build: added cross-compilation configure options

this enables use of a cross-compilation emulator, so configure tests
run on an emulator of the target platform

1 files changed, 34 insertions, 0 deletions

diff --git a/buildtools/wafsamba/samba_cross.py b/buildtools/wafsamba/samba_cross.py
new file mode 100644
index 0000000000..70d74e0c94
--- /dev/null
+++ b/buildtools/wafsamba/samba_cross.py
@@ -0,0 +1,34 @@
+# functions for handling cross-compilation
+
+import pproc, Utils
+from Configure import conf
+from pproc import Popen
+
+real_Popen = None
+
+class cross_Popen(Popen):
+    '''cross-compilation wrapper for Popen'''
+    def __init__(*k, **kw):
+        (obj, args) = k
+        if '--cross-execute' in args:
+            # when --cross-execute is set, then change the arguments
+            # to use the cross emulator
+            i = args.index('--cross-execute')
+            newargs = args[i+1].split()
+            newargs.extend(args[0:i])
+            args = newargs
+        Popen.__init__(*(obj, args), **kw)
+
+
+@conf
+def SAMBA_CROSS_ARGS(conf):
+    '''get exec_args to pass when running cross compiled binaries'''
+    if not conf.env.CROSS_COMPILE or not conf.env.CROSS_EXECUTE:
+        return []
+
+    global real_Popen
+    if real_Popen is None:
+        real_Popen  = Utils.pproc.Popen
+        Utils.pproc.Popen = cross_Popen
+
+    return ['--cross-execute', conf.env.CROSS_EXECUTE]