[cortex-m] Avoid slow memcpy and memset in startup code

modm-io · Jan 23, 2025 · dcadbed · dcadbed
1 parent 539a0bf
commit dcadbed
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/src/modm/platform/core/cortex/module.lb b/src/modm/platform/core/cortex/module.lb
@@ -365,10 +365,12 @@ def build(env):
 
     # startup script
     env.template("reset_handler.sx.in")
-    env.template("startup.c.in")
+    ops = env.template("startup.c.in")
+    env.collect(":build:cflags", "-fno-builtin", operations=ops)
+    env.collect(":build:linkflags", "-nostartfiles")
+
     env.template("vectors.c.in")
     env.template("vectors.hpp.in")
-    env.collect(":build:linkflags", "-nostartfiles")
 
     # dealing with runtime assertions
     if env.has_module(":architecture:assert"):