Set environment variables defining target for build-essential

In the future we will allow this to be modified to provide a
cross-bootstrap mode, but for now we use the same target as
the host compiler.

1 files changed, 11 insertions, 0 deletions

diff --git a/morphlib/util.py b/morphlib/util.py
index 16063f45..c3a7ac9f 100644
--- a/morphlib/util.py
+++ b/morphlib/util.py
@@ -42,6 +42,17 @@ def arch():
     '''Return the CPU architecture of the current host.'''
     return os.uname()[4]
 
+
+def target(runcmd):  # pragma: no cover
+    '''Returns the machine triplet of the current host'''
+    try:
+        target = runcmd(['cc', '-dumpmachine']).strip()
+    except cliapp.AppException as e:
+        raise morphlib.Error(
+            'Failed to execute host compiler \'cc\': %s' % e)
+    return target
+
+
 def indent(string, spaces=4):
     '''Return ``string`` indented by ``spaces`` spaces.