[Xen-changelog] [xen staging] README: document requirement about python

[patchbot@xxxxxxx]

commit bdd0f3c9b06f932d5bae2a277ae2efb233b48f04
Author:     Wei Liu <wei.liu2@xxxxxxxxxx>
AuthorDate: Tue May 14 15:22:32 2019 +0100
Commit:     Wei Liu <wei.liu2@xxxxxxxxxx>
CommitDate: Wed May 15 12:45:50 2019 +0100

    README: document requirement about python
    
    Provide information on what is expected from the build system
    regarding python.
    
    Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 README | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/README b/README
index 23e4f7c3dc..26d44cf7c1 100644
--- a/README
+++ b/README
@@ -181,6 +181,13 @@ Various tools, such as pygrub, have the following runtime 
dependencies:
           URL:    http://www.python.org/
           Debian: python
 
+Note that the build system expects `python` to be available. If your system
+only has `python2` or `python3` but not `python` (as in Linux From Scratch),
+you will need to create a symlink for it, or specify PYTHON= when invoking
+make, like (note the position of PYTHON= matters):
+
+    # make PYTHON=/usr/bin/python3
+
 Intel(R) Trusted Execution Technology Support
 =============================================
 
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generated by git-patchbot for /home/xen/git/xen.git#staging

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