Move LTO code from SDK logic to general build logic, supports all pro…

…jects

builder/frameworks/_bare.py

@@ -11,6 +11,16 @@
 
 machine_arch = str(board.get("build.march"))
 
+def get_flag_value(flag_name:str, default_val:bool):
+    flag_val = board.get("build.%s" % flag_name, default_val)
+    flag_val = str(flag_val).lower() in ("1", "yes", "true")
+    return flag_val
+
+lto_flag = ""
+if get_flag_value("use_lto", False):
+    lto_flag = "-flto"
+    env.Append(LINKFLAGS=["-flto"], CCFLAGS=["-flto"])
+
 env.Append(
     ASFLAGS=[
         "-march=%s" % machine_arch,
@@ -48,6 +58,7 @@
         "-Wunused",
         "-Wuninitialized",
         "-Wno-comment",
+        lto_flag,
         "-march=%s" % machine_arch,
         "-mabi=%s" % board.get("build.mabi"),
     ],
@@ -68,8 +79,10 @@
         "-nostartfiles",
         '-Wl,-Map="%s"' % os.path.join(
             "$BUILD_DIR", os.path.basename(env.subst("${PROJECT_DIR}.map"))),
+        lto_flag,
     ]
 )
 # copy general C/C++ flags to assembler with cpp flags too, except
 # would-be-duplicate last two elements
-env["ASPPFLAGS"].extend(env["CCFLAGS"][:-2]) 
+env["ASPPFLAGS"].extend(env["CCFLAGS"][:-2]) 
+

builder/frameworks/noneos_sdk.py

@@ -93,9 +93,6 @@ def get_startup_filename(board):
         env.Exit(-1)
     return startup_file
 
-if get_flag_value("use_lto", False):
-    env.Append(LINKFLAGS=["-flto"], CCFLAGS=["-flto"])
-
 env.Append(
     CPPPATH=[
         join(FRAMEWORK_DIR, "Core", chip_series),