#1147 same workaround as in arduino cli

Author: jantje

io.sloeber.core/config/post_processing_boards_default.txt

@@ -1,8 +1,3 @@
-mega.compiler.c.elf.flags={compiler.warning_flags} -Os -g -flto -fuse-linker-plugin -Wl,--gc-sections,--relax
-megaADK.compiler.c.elf.flags={compiler.warning_flags} -Os -g -flto -fuse-linker-plugin -Wl,--gc-sections,--relax
-
-
-
 
 #workaround for maxim to avoid double quotes
 max32620_fthr.build.usbLib=-Ddefined_in_post_processing_boards_txt

io.sloeber.core/src/io/sloeber/core/common/Const.java

@@ -48,20 +48,18 @@ public class Const {
 	public static final String ARDUINO_VARIANT_FOLDER_PATH =ARDUINO_CODE_FOLDER_NAME+ "/variant";
 
 	// tags to interpret the arduino txt config files
-
+	public static final String ENV_KEY_JANTJE_START = "JANTJE.";
 	public static final String ERASE_START = "A" + DOT;
 
 	public static final String ENV_KEY_UPLOAD_USE_1200BPS_TOUCH = ERASE_START + "UPLOAD.USE_1200BPS_TOUCH";
-
 	public static final String ENV_KEY_WAIT_FOR_UPLOAD_PORT = ERASE_START + "UPLOAD.WAIT_FOR_UPLOAD_PORT";
 	public static final String ENV_KEY_RESET_BEFORE_UPLOAD = ERASE_START + "UPLOAD.FORCE_RESET_BEFORE_UPLOAD";
 	public static final String ENV_KEY_NETWORK_PORT = ERASE_START + "NETWORK.PORT";
 	public static final String ENV_KEY_NETWORK_AUTH = ERASE_START + "NETWORK.AUTH";
-
-	public static final String ENV_KEY_USE_ARCHIVER = ERASE_START + "BUILD.USE_ARCHIVER";
-
-	public static final String ENV_KEY_JANTJE_START = "JANTJE.";
+    public static final String ENV_KEY_USE_ARCHIVER = ERASE_START + "BUILD.USE_ARCHIVER";
+	public static final String ENV_KEY_BUILD_MCU = ERASE_START + "BUILD.MCU";
+	public static final String ENV_KEY_BUILD_COMPILER_C_ELF_FLAGS = ERASE_START + "COMPILER.C.ELF.FLAGS";
 
 	public static final String ARDUINO_NATURE_ID = "io.sloeber.arduinonature";
-
+	
 }

io.sloeber.core/src/io/sloeber/core/tools/Helpers.java

@@ -944,6 +944,12 @@ else if("A.BUILD.USB_PRODUCT".equalsIgnoreCase(name)){
 		setHookBuildEnvironmentVariable(contribEnv, confDesc, "A.JANTJE.SKETCH.POSTBUILD","A.RECIPE.HOOKS.SKETCH.POSTBUILD.XX.PATTERN",false);
 
 
+		//add -relax for mega boards
+		String buildMCU =getBuildEnvironmentVariable(confDesc, Const.ENV_KEY_BUILD_MCU, new String(), false);
+		if ("atmega2560".equalsIgnoreCase(buildMCU)){
+				String c_elf_flags =getBuildEnvironmentVariable(confDesc, Const.ENV_KEY_BUILD_COMPILER_C_ELF_FLAGS, new String(), false);
+				setBuildEnvironmentVariable(confDesc, Const.ENV_KEY_BUILD_COMPILER_C_ELF_FLAGS, c_elf_flags +",--relax");
+			}
 	}