From 13d1d4cf8edabcfcffc0b8f44e4bf265775d4fe8 Mon Sep 17 00:00:00 2001
From: Gary Wong <gtw@gnu.org>
Date: Fri, 22 Jan 2021 11:58:14 -0700
Subject: [PATCH] integration/export: allow manually specifying toolchain
 triple.

If the environment variable TRIPLE is defined, use its value as the
highest priority candidate.  Useful for testing new cross-compilers,
or selecting among toolchains in a different priority than the built-in
list.
---
 litex/soc/integration/export.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/litex/soc/integration/export.py b/litex/soc/integration/export.py
index e2fabb35d..2296f6a6e 100644
--- a/litex/soc/integration/export.py
+++ b/litex/soc/integration/export.py
@@ -64,6 +64,9 @@ def get_cpu_mak(cpu, compile_software):
         r = None
         if not isinstance(triple, tuple):
             triple = (triple,)
+        override = os.getenv( "TRIPLE" )
+        if override:
+            triple = (override,) + triple
         p = get_platform()
         for i in range(len(triple)):
             t = triple[i]