From 3ec39b1881535d7a0727b5afd6b78d816b556b73 Mon Sep 17 00:00:00 2001
From: Philipp van Kempen <philipp.van-kempen@tum.de>
Date: Tue, 19 Dec 2023 11:51:11 +0100
Subject: [PATCH] target/riscv/utils.py: merge imafd to g when joining
 extensions

---
 mlonmcu/target/riscv/util.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/mlonmcu/target/riscv/util.py b/mlonmcu/target/riscv/util.py
index 488bf5246..1838de5f1 100644
--- a/mlonmcu/target/riscv/util.py
+++ b/mlonmcu/target/riscv/util.py
@@ -87,9 +87,12 @@ def _get_index(x):
     return extensions_new
 
 
-def join_extensions(exts):
+def join_extensions(exts, merge=True):
     sep = ""
     ret = ""
+    if merge:
+        if "i" in exts and "m" in exts and "a" in exts and "f" in exts and "d" in exts:
+            exts = ["g"] + [e for e in exts if e not in "imafd"]
     for ext in exts:
         length = len(ext)
         if sep == "_":