diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 81435b0..6e4368d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -4,7 +4,7 @@ on: [push, pull_request, workflow_dispatch]
 
 env:
   IDE_VERSION: 1.8.19
-  TEENSY_VERSION: 161
+  TEENSY_VERSION: 162
   IDE_LOCATION: /usr/local/share/arduino
 
 jobs:
diff --git a/README.md b/README.md
index 32e0cfe..5fa91d9 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ This is meant to be used in conjunction with the [ArduinoXInput library](https:/
 
 You must have both [the Arduino IDE](https://www.arduino.cc/en/main/software) and [Teensyduino](https://www.pjrc.com/teensy/td_download.html) installed before proceeding.
 
-Double-check that your installed Teensyduino version matches the files provided in this repository. This repository is currently using [**Teensyduino 1.61**](https://www.pjrc.com/teensy/td_161). You can download older versions on [the releases page](../../releases).
+Double-check that your installed Teensyduino version matches the files provided in this repository. This repository is currently using [**Teensyduino 1.62**](https://www.pjrc.com/teensy/td_162). You can download older versions on [the releases page](../../releases).
 
 If you don't know your Teensyduino version, compile a blank sketch with a Teensy board selected and the Teensy Loader will open. In the Teensy Loader window select `Help -> About` and it will tell you the version number. If your version does not match you will have to reinstall or update the Teensyduino software.
 
diff --git a/teensy/avr/boards.txt b/teensy/avr/boards.txt
index bc05ca7..df69efb 100644
--- a/teensy/avr/boards.txt
+++ b/teensy/avr/boards.txt
@@ -19,7 +19,7 @@ menu.keys=Keyboard Layout
 teensy41.name=Teensy 4.1
 #teensy41.upload.maximum_size=8126464
 teensy41.build.board=TEENSY41
-teensy41.build.flags.ld=-Wl,--gc-sections,--relax "-T{build.core.path}/imxrt1062_t41.ld"
+teensy41.build.flags.ld=-Wl,--gc-sections,--relax,--no-warn-rwx-segments "-T{build.core.path}/imxrt1062_t41.ld"
 #teensy41.upload.maximum_data_size=524288
 teensy41.upload.tool=teensyloader
 teensy41.upload.tool.default=teensyloader
@@ -42,7 +42,7 @@ teensy41.build.flags.dep=-MMD
 teensy41.build.flags.optimize=-Os
 teensy41.build.flags.cpu=-mthumb -mcpu=cortex-m7 -mfloat-abi=hard -mfpu=fpv5-d16
 teensy41.build.flags.defs=-D__IMXRT1062__ -DTEENSYDUINO=160
-teensy41.build.flags.cpp=-std=gnu++17 -fno-exceptions -fpermissive -fno-rtti -fno-threadsafe-statics -felide-constructors -Wno-error=narrowing -Wno-psabi
+teensy41.build.flags.cpp=-std=gnu++17 -fno-exceptions -fpermissive -fno-rtti -fno-threadsafe-statics -felide-constructors -Wno-error=narrowing -Wno-psabi -Wno-maybe-uninitialized
 teensy41.build.flags.c=
 teensy41.build.flags.S=-x assembler-with-cpp
 teensy41.build.flags.libs=-larm_cortexM7lfsp_math -lm -lstdc++
@@ -167,14 +167,20 @@ teensy41.menu.speed.24.build.fcpu=24000000
 teensy41.menu.opt.o2std=Faster
 teensy41.menu.opt.o2std.build.flags.optimize=-O2
 teensy41.menu.opt.o2std.build.flags.ldspecs=
+teensy41.menu.opt.o2stdnano=Faster + Nano Libc
+teensy41.menu.opt.o2stdnano.build.flags.optimize=-O2 --specs=nano.specs 
+teensy41.menu.opt.o2stdnano.build.flags.ldspecs=
 teensy41.menu.opt.o2lto=Faster with LTO
-teensy41.menu.opt.o2lto.build.flags.optimize=-O2 -flto -fno-fat-lto-objects
+teensy41.menu.opt.o2lto.build.flags.optimize=-O2 -flto=auto -fno-fat-lto-objects
 teensy41.menu.opt.o2lto.build.flags.ldspecs=-fuse-linker-plugin
+teensy41.menu.opt.o2ltonano=Faster with LTO + Nano Libc
+teensy41.menu.opt.o2ltonano.build.flags.optimize=-O2 -flto=auto -fno-fat-lto-objects --specs=nano.specs 
+teensy41.menu.opt.o2ltonano.build.flags.ldspecs=-fuse-linker-plugin
 teensy41.menu.opt.o1std=Fast
 teensy41.menu.opt.o1std.build.flags.optimize=-O1
 teensy41.menu.opt.o1std.build.flags.ldspecs=
 teensy41.menu.opt.o1lto=Fast with LTO
-teensy41.menu.opt.o1lto.build.flags.optimize=-O1 -flto -fno-fat-lto-objects
+teensy41.menu.opt.o1lto.build.flags.optimize=-O1 -flto=auto -fno-fat-lto-objects
 teensy41.menu.opt.o1lto.build.flags.ldspecs=-fuse-linker-plugin
 teensy41.menu.opt.o3std=Fastest
 teensy41.menu.opt.o3std.build.flags.optimize=-O3
@@ -183,22 +189,22 @@ teensy41.menu.opt.o3std.build.flags.ldspecs=
 #teensy41.menu.opt.o3purestd.build.flags.optimize=-O3 -mpure-code -D__PURE_CODE__
 #teensy41.menu.opt.o3purestd.build.flags.ldspecs=
 teensy41.menu.opt.o3lto=Fastest with LTO
-teensy41.menu.opt.o3lto.build.flags.optimize=-O3 -flto -fno-fat-lto-objects
+teensy41.menu.opt.o3lto.build.flags.optimize=-O3 -flto=auto -fno-fat-lto-objects
 teensy41.menu.opt.o3lto.build.flags.ldspecs=-fuse-linker-plugin
 #teensy41.menu.opt.o3purelto=Fastest + pure-code with LTO
-#teensy41.menu.opt.o3purelto.build.flags.optimize=-O3 -mpure-code -D__PURE_CODE__ -flto -fno-fat-lto-objects
+#teensy41.menu.opt.o3purelto.build.flags.optimize=-O3 -mpure-code -D__PURE_CODE__ -flto=auto -fno-fat-lto-objects
 #teensy41.menu.opt.o3purelto.build.flags.ldspecs=-fuse-linker-plugin
 teensy41.menu.opt.ogstd=Debug
 teensy41.menu.opt.ogstd.build.flags.optimize=-Og
 teensy41.menu.opt.ogstd.build.flags.ldspecs=
 #teensy41.menu.opt.oglto=Debug with LTO
-#teensy41.menu.opt.oglto.build.flags.optimize=-Og -flto -fno-fat-lto-objects
+#teensy41.menu.opt.oglto.build.flags.optimize=-Og -flto=auto -fno-fat-lto-objects
 #teensy41.menu.opt.oglto.build.flags.ldspecs=-fuse-linker-plugin
 teensy41.menu.opt.osstd=Smallest Code
 teensy41.menu.opt.osstd.build.flags.optimize=-Os --specs=nano.specs
 teensy41.menu.opt.osstd.build.flags.ldspecs=
 teensy41.menu.opt.oslto=Smallest Code with LTO
-teensy41.menu.opt.oslto.build.flags.optimize=-Os -flto -fno-fat-lto-objects --specs=nano.specs
+teensy41.menu.opt.oslto.build.flags.optimize=-Os -flto=auto -fno-fat-lto-objects --specs=nano.specs
 teensy41.menu.opt.oslto.build.flags.ldspecs=-fuse-linker-plugin
 
 teensy41.menu.keys.en-us=US English
@@ -258,7 +264,7 @@ teensy41.menu.keys.usint.build.keylayout=US_INTERNATIONAL
 teensyMM.name=Teensy MicroMod
 #teensyMM.upload.maximum_size=16515072
 teensyMM.build.board=TEENSY_MICROMOD
-teensyMM.build.flags.ld=-Wl,--gc-sections,--relax "-T{build.core.path}/imxrt1062_mm.ld"
+teensyMM.build.flags.ld=-Wl,--gc-sections,--relax,--no-warn-rwx-segments "-T{build.core.path}/imxrt1062_mm.ld"
 #teensyMM.upload.maximum_data_size=524288
 #teensyMM.upload.maximum_data_size=1048576
 teensyMM.upload.tool=teensyloader
@@ -282,7 +288,7 @@ teensyMM.build.flags.dep=-MMD
 teensyMM.build.flags.optimize=-Os
 teensyMM.build.flags.cpu=-mthumb -mcpu=cortex-m7 -mfloat-abi=hard -mfpu=fpv5-d16
 teensyMM.build.flags.defs=-D__IMXRT1062__ -DTEENSYDUINO=160
-teensyMM.build.flags.cpp=-std=gnu++17 -fno-exceptions -fpermissive -fno-rtti -fno-threadsafe-statics -felide-constructors -Wno-error=narrowing -Wno-psabi
+teensyMM.build.flags.cpp=-std=gnu++17 -fno-exceptions -fpermissive -fno-rtti -fno-threadsafe-statics -felide-constructors -Wno-error=narrowing -Wno-psabi -Wno-maybe-uninitialized
 teensyMM.build.flags.c=
 teensyMM.build.flags.S=-x assembler-with-cpp
 teensyMM.build.flags.libs=-larm_cortexM7lfsp_math -lm -lstdc++
@@ -407,14 +413,20 @@ teensyMM.menu.speed.24.build.fcpu=24000000
 teensyMM.menu.opt.o2std=Faster
 teensyMM.menu.opt.o2std.build.flags.optimize=-O2
 teensyMM.menu.opt.o2std.build.flags.ldspecs=
+teensyMM.menu.opt.o2stdnano=Faster + Nano Libc
+teensyMM.menu.opt.o2stdnano.build.flags.optimize=-O2 --specs=nano.specs 
+teensyMM.menu.opt.o2stdnano.build.flags.ldspecs=
 teensyMM.menu.opt.o2lto=Faster with LTO
-teensyMM.menu.opt.o2lto.build.flags.optimize=-O2 -flto -fno-fat-lto-objects
+teensyMM.menu.opt.o2lto.build.flags.optimize=-O2 -flto=auto -fno-fat-lto-objects
 teensyMM.menu.opt.o2lto.build.flags.ldspecs=-fuse-linker-plugin
+teensyMM.menu.opt.o2ltonano=Faster with LTO + Nano Libc
+teensyMM.menu.opt.o2ltonano.build.flags.optimize=-O2 -flto=auto -fno-fat-lto-objects --specs=nano.specs 
+teensyMM.menu.opt.o2ltonano.build.flags.ldspecs=-fuse-linker-plugin
 teensyMM.menu.opt.o1std=Fast
 teensyMM.menu.opt.o1std.build.flags.optimize=-O1
 teensyMM.menu.opt.o1std.build.flags.ldspecs=
 teensyMM.menu.opt.o1lto=Fast with LTO
-teensyMM.menu.opt.o1lto.build.flags.optimize=-O1 -flto -fno-fat-lto-objects
+teensyMM.menu.opt.o1lto.build.flags.optimize=-O1 -flto=auto -fno-fat-lto-objects
 teensyMM.menu.opt.o1lto.build.flags.ldspecs=-fuse-linker-plugin
 teensyMM.menu.opt.o3std=Fastest
 teensyMM.menu.opt.o3std.build.flags.optimize=-O3
@@ -423,22 +435,22 @@ teensyMM.menu.opt.o3std.build.flags.ldspecs=
 #teensyMM.menu.opt.o3purestd.build.flags.optimize=-O3 -mpure-code -D__PURE_CODE__
 #teensyMM.menu.opt.o3purestd.build.flags.ldspecs=
 teensyMM.menu.opt.o3lto=Fastest with LTO
-teensyMM.menu.opt.o3lto.build.flags.optimize=-O3 -flto -fno-fat-lto-objects
+teensyMM.menu.opt.o3lto.build.flags.optimize=-O3 -flto=auto -fno-fat-lto-objects
 teensyMM.menu.opt.o3lto.build.flags.ldspecs=-fuse-linker-plugin
 #teensyMM.menu.opt.o3purelto=Fastest + pure-code with LTO
-#teensyMM.menu.opt.o3purelto.build.flags.optimize=-O3 -mpure-code -D__PURE_CODE__ -flto -fno-fat-lto-objects
+#teensyMM.menu.opt.o3purelto.build.flags.optimize=-O3 -mpure-code -D__PURE_CODE__ -flto=auto -fno-fat-lto-objects
 #teensyMM.menu.opt.o3purelto.build.flags.ldspecs=-fuse-linker-plugin
 teensyMM.menu.opt.ogstd=Debug
 teensyMM.menu.opt.ogstd.build.flags.optimize=-Og
 teensyMM.menu.opt.ogstd.build.flags.ldspecs=
 #teensyMM.menu.opt.oglto=Debug with LTO
-#teensyMM.menu.opt.oglto.build.flags.optimize=-Og -flto -fno-fat-lto-objects
+#teensyMM.menu.opt.oglto.build.flags.optimize=-Og -flto=auto -fno-fat-lto-objects
 #teensyMM.menu.opt.oglto.build.flags.ldspecs=-fuse-linker-plugin
 teensyMM.menu.opt.osstd=Smallest Code
 teensyMM.menu.opt.osstd.build.flags.optimize=-Os --specs=nano.specs
 teensyMM.menu.opt.osstd.build.flags.ldspecs=
 teensyMM.menu.opt.oslto=Smallest Code with LTO
-teensyMM.menu.opt.oslto.build.flags.optimize=-Os -flto -fno-fat-lto-objects --specs=nano.specs
+teensyMM.menu.opt.oslto.build.flags.optimize=-Os -flto=auto -fno-fat-lto-objects --specs=nano.specs
 teensyMM.menu.opt.oslto.build.flags.ldspecs=-fuse-linker-plugin
 
 teensyMM.menu.keys.en-us=US English
@@ -498,7 +510,7 @@ teensyMM.menu.keys.usint.build.keylayout=US_INTERNATIONAL
 teensy40.name=Teensy 4.0
 #teensy40.upload.maximum_size=2031616
 teensy40.build.board=TEENSY40
-teensy40.build.flags.ld=-Wl,--gc-sections,--relax "-T{build.core.path}/imxrt1062.ld"
+teensy40.build.flags.ld=-Wl,--gc-sections,--relax,--no-warn-rwx-segments "-T{build.core.path}/imxrt1062.ld"
 #teensy40.upload.maximum_data_size=524288
 #teensy40.upload.maximum_data_size=1048576
 teensy40.upload.tool=teensyloader
@@ -522,7 +534,7 @@ teensy40.build.flags.dep=-MMD
 teensy40.build.flags.optimize=-Os
 teensy40.build.flags.cpu=-mthumb -mcpu=cortex-m7 -mfloat-abi=hard -mfpu=fpv5-d16
 teensy40.build.flags.defs=-D__IMXRT1062__ -DTEENSYDUINO=160
-teensy40.build.flags.cpp=-std=gnu++17 -fno-exceptions -fpermissive -fno-rtti -fno-threadsafe-statics -felide-constructors -Wno-error=narrowing -Wno-psabi
+teensy40.build.flags.cpp=-std=gnu++17 -fno-exceptions -fpermissive -fno-rtti -fno-threadsafe-statics -felide-constructors -Wno-error=narrowing -Wno-psabi -Wno-maybe-uninitialized
 teensy40.build.flags.c=
 teensy40.build.flags.S=-x assembler-with-cpp
 teensy40.build.flags.libs=-larm_cortexM7lfsp_math -lm -lstdc++
@@ -647,14 +659,20 @@ teensy40.menu.speed.24.build.fcpu=24000000
 teensy40.menu.opt.o2std=Faster
 teensy40.menu.opt.o2std.build.flags.optimize=-O2
 teensy40.menu.opt.o2std.build.flags.ldspecs=
+teensy40.menu.opt.o2stdnano=Faster + Nano Libc
+teensy40.menu.opt.o2stdnano.build.flags.optimize=-O2 --specs=nano.specs 
+teensy40.menu.opt.o2stdnano.build.flags.ldspecs=
 teensy40.menu.opt.o2lto=Faster with LTO
-teensy40.menu.opt.o2lto.build.flags.optimize=-O2 -flto -fno-fat-lto-objects
+teensy40.menu.opt.o2lto.build.flags.optimize=-O2 -flto=auto -fno-fat-lto-objects
 teensy40.menu.opt.o2lto.build.flags.ldspecs=-fuse-linker-plugin
+teensy40.menu.opt.o2ltonano=Faster with LTO + Nano Libc
+teensy40.menu.opt.o2ltonano.build.flags.optimize=-O2 -flto=auto -fno-fat-lto-objects --specs=nano.specs 
+teensy40.menu.opt.o2ltonano.build.flags.ldspecs=-fuse-linker-plugin
 teensy40.menu.opt.o1std=Fast
 teensy40.menu.opt.o1std.build.flags.optimize=-O1
 teensy40.menu.opt.o1std.build.flags.ldspecs=
 teensy40.menu.opt.o1lto=Fast with LTO
-teensy40.menu.opt.o1lto.build.flags.optimize=-O1 -flto -fno-fat-lto-objects
+teensy40.menu.opt.o1lto.build.flags.optimize=-O1 -flto=auto -fno-fat-lto-objects
 teensy40.menu.opt.o1lto.build.flags.ldspecs=-fuse-linker-plugin
 teensy40.menu.opt.o3std=Fastest
 teensy40.menu.opt.o3std.build.flags.optimize=-O3
@@ -663,22 +681,22 @@ teensy40.menu.opt.o3std.build.flags.ldspecs=
 #teensy40.menu.opt.o3purestd.build.flags.optimize=-O3 -mpure-code -D__PURE_CODE__
 #teensy40.menu.opt.o3purestd.build.flags.ldspecs=
 teensy40.menu.opt.o3lto=Fastest with LTO
-teensy40.menu.opt.o3lto.build.flags.optimize=-O3 -flto -fno-fat-lto-objects
+teensy40.menu.opt.o3lto.build.flags.optimize=-O3 -flto=auto -fno-fat-lto-objects
 teensy40.menu.opt.o3lto.build.flags.ldspecs=-fuse-linker-plugin
 #teensy40.menu.opt.o3purelto=Fastest + pure-code with LTO
-#teensy40.menu.opt.o3purelto.build.flags.optimize=-O3 -mpure-code -D__PURE_CODE__ -flto -fno-fat-lto-objects
+#teensy40.menu.opt.o3purelto.build.flags.optimize=-O3 -mpure-code -D__PURE_CODE__ -flto=auto -fno-fat-lto-objects
 #teensy40.menu.opt.o3purelto.build.flags.ldspecs=-fuse-linker-plugin
 teensy40.menu.opt.ogstd=Debug
 teensy40.menu.opt.ogstd.build.flags.optimize=-Og
 teensy40.menu.opt.ogstd.build.flags.ldspecs=
 #teensy40.menu.opt.oglto=Debug with LTO
-#teensy40.menu.opt.oglto.build.flags.optimize=-Og -flto -fno-fat-lto-objects
+#teensy40.menu.opt.oglto.build.flags.optimize=-Og -flto=auto -fno-fat-lto-objects
 #teensy40.menu.opt.oglto.build.flags.ldspecs=-fuse-linker-plugin
 teensy40.menu.opt.osstd=Smallest Code
 teensy40.menu.opt.osstd.build.flags.optimize=-Os --specs=nano.specs
 teensy40.menu.opt.osstd.build.flags.ldspecs=
 teensy40.menu.opt.oslto=Smallest Code with LTO
-teensy40.menu.opt.oslto.build.flags.optimize=-Os -flto -fno-fat-lto-objects --specs=nano.specs
+teensy40.menu.opt.oslto.build.flags.optimize=-Os -flto=auto -fno-fat-lto-objects --specs=nano.specs
 teensy40.menu.opt.oslto.build.flags.ldspecs=-fuse-linker-plugin
 
 teensy40.menu.keys.en-us=US English
@@ -758,10 +776,10 @@ teensy36.build.flags.dep=-MMD
 teensy36.build.flags.optimize=-Os
 teensy36.build.flags.cpu=-mthumb -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -fsingle-precision-constant
 teensy36.build.flags.defs=-D__MK66FX1M0__ -DTEENSYDUINO=160
-teensy36.build.flags.cpp=-fno-exceptions -fpermissive -felide-constructors -std=gnu++17 -Wno-error=narrowing -fno-rtti -Wno-psabi
+teensy36.build.flags.cpp=-fno-exceptions -fpermissive -felide-constructors -std=gnu++17 -Wno-error=narrowing -fno-rtti -Wno-psabi -Wno-maybe-uninitialized
 teensy36.build.flags.c=
 teensy36.build.flags.S=-x assembler-with-cpp
-teensy36.build.flags.ld=-Wl,--gc-sections,--relax,--defsym=__rtc_localtime={extra.time.local} "-T{build.core.path}/mk66fx1m0.ld"
+teensy36.build.flags.ld=-Wl,--gc-sections,--relax,--no-warn-rwx-segments,--defsym=__rtc_localtime={extra.time.local} "-T{build.core.path}/mk66fx1m0.ld"
 teensy36.build.flags.libs=-larm_cortexM4lf_math -lm -lstdc++
 teensy36.serial.restart_cmd=false
 teensy36.menu.usb.serial=Serial
@@ -888,13 +906,13 @@ teensy36.menu.opt.o2std=Faster
 teensy36.menu.opt.o2std.build.flags.optimize=-O2
 teensy36.menu.opt.o2std.build.flags.ldspecs=
 teensy36.menu.opt.o2lto=Faster with LTO
-teensy36.menu.opt.o2lto.build.flags.optimize=-O2 -flto -fno-fat-lto-objects
+teensy36.menu.opt.o2lto.build.flags.optimize=-O2 -flto=auto -fno-fat-lto-objects
 teensy36.menu.opt.o2lto.build.flags.ldspecs=-fuse-linker-plugin
 teensy36.menu.opt.o1std=Fast
 teensy36.menu.opt.o1std.build.flags.optimize=-O1
 teensy36.menu.opt.o1std.build.flags.ldspecs=
 teensy36.menu.opt.o1lto=Fast with LTO
-teensy36.menu.opt.o1lto.build.flags.optimize=-O1 -flto -fno-fat-lto-objects
+teensy36.menu.opt.o1lto.build.flags.optimize=-O1 -flto=auto -fno-fat-lto-objects
 teensy36.menu.opt.o1lto.build.flags.ldspecs=-fuse-linker-plugin
 teensy36.menu.opt.o3std=Fastest
 teensy36.menu.opt.o3std.build.flags.optimize=-O3
@@ -903,22 +921,22 @@ teensy36.menu.opt.o3purestd=Fastest + pure-code
 teensy36.menu.opt.o3purestd.build.flags.optimize=-O3 -mpure-code -D__PURE_CODE__
 teensy36.menu.opt.o3purestd.build.flags.ldspecs=
 teensy36.menu.opt.o3lto=Fastest with LTO
-teensy36.menu.opt.o3lto.build.flags.optimize=-O3 -flto -fno-fat-lto-objects
+teensy36.menu.opt.o3lto.build.flags.optimize=-O3 -flto=auto -fno-fat-lto-objects
 teensy36.menu.opt.o3lto.build.flags.ldspecs=-fuse-linker-plugin
 teensy36.menu.opt.o3purelto=Fastest + pure-code with LTO
-teensy36.menu.opt.o3purelto.build.flags.optimize=-O3 -mpure-code -D__PURE_CODE__ -flto -fno-fat-lto-objects
+teensy36.menu.opt.o3purelto.build.flags.optimize=-O3 -mpure-code -D__PURE_CODE__ -flto=auto -fno-fat-lto-objects
 teensy36.menu.opt.o3purelto.build.flags.ldspecs=-fuse-linker-plugin
 teensy36.menu.opt.ogstd=Debug
 teensy36.menu.opt.ogstd.build.flags.optimize=-Og
 teensy36.menu.opt.ogstd.build.flags.ldspecs=
 teensy36.menu.opt.oglto=Debug with LTO
-teensy36.menu.opt.oglto.build.flags.optimize=-Og -flto -fno-fat-lto-objects
+teensy36.menu.opt.oglto.build.flags.optimize=-Og -flto=auto -fno-fat-lto-objects
 teensy36.menu.opt.oglto.build.flags.ldspecs=-fuse-linker-plugin
 teensy36.menu.opt.osstd=Smallest Code
 teensy36.menu.opt.osstd.build.flags.optimize=-Os --specs=nano.specs
 teensy36.menu.opt.osstd.build.flags.ldspecs=
 teensy36.menu.opt.oslto=Smallest Code with LTO
-teensy36.menu.opt.oslto.build.flags.optimize=-Os -flto -fno-fat-lto-objects --specs=nano.specs
+teensy36.menu.opt.oslto.build.flags.optimize=-Os -flto=auto -fno-fat-lto-objects --specs=nano.specs
 teensy36.menu.opt.oslto.build.flags.ldspecs=-fuse-linker-plugin
 
 teensy36.menu.keys.en-us=US English
@@ -998,10 +1016,10 @@ teensy35.build.flags.dep=-MMD
 teensy35.build.flags.optimize=-Os
 teensy35.build.flags.cpu=-mthumb -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -fsingle-precision-constant
 teensy35.build.flags.defs=-D__MK64FX512__ -DTEENSYDUINO=160
-teensy35.build.flags.cpp=-fno-exceptions -fpermissive -felide-constructors -std=gnu++17 -Wno-error=narrowing -fno-rtti -Wno-psabi
+teensy35.build.flags.cpp=-fno-exceptions -fpermissive -felide-constructors -std=gnu++17 -Wno-error=narrowing -fno-rtti -Wno-psabi -Wno-maybe-uninitialized
 teensy35.build.flags.c=
 teensy35.build.flags.S=-x assembler-with-cpp
-teensy35.build.flags.ld=-Wl,--gc-sections,--relax,--defsym=__rtc_localtime={extra.time.local} "-T{build.core.path}/mk64fx512.ld"
+teensy35.build.flags.ld=-Wl,--gc-sections,--relax,--no-warn-rwx-segments,--defsym=__rtc_localtime={extra.time.local} "-T{build.core.path}/mk64fx512.ld"
 teensy35.build.flags.libs=-larm_cortexM4lf_math -lm -lstdc++
 teensy35.serial.restart_cmd=false
 teensy35.menu.usb.serial=Serial
@@ -1118,13 +1136,13 @@ teensy35.menu.opt.o2std=Faster
 teensy35.menu.opt.o2std.build.flags.optimize=-O2
 teensy35.menu.opt.o2std.build.flags.ldspecs=
 teensy35.menu.opt.o2lto=Faster with LTO
-teensy35.menu.opt.o2lto.build.flags.optimize=-O2 -flto -fno-fat-lto-objects
+teensy35.menu.opt.o2lto.build.flags.optimize=-O2 -flto=auto -fno-fat-lto-objects
 teensy35.menu.opt.o2lto.build.flags.ldspecs=-fuse-linker-plugin
 teensy35.menu.opt.o1std=Fast
 teensy35.menu.opt.o1std.build.flags.optimize=-O1
 teensy35.menu.opt.o1std.build.flags.ldspecs=
 teensy35.menu.opt.o1lto=Fast with LTO
-teensy35.menu.opt.o1lto.build.flags.optimize=-O1 -flto -fno-fat-lto-objects
+teensy35.menu.opt.o1lto.build.flags.optimize=-O1 -flto=auto -fno-fat-lto-objects
 teensy35.menu.opt.o1lto.build.flags.ldspecs=-fuse-linker-plugin
 teensy35.menu.opt.o3std=Fastest
 teensy35.menu.opt.o3std.build.flags.optimize=-O3
@@ -1133,22 +1151,22 @@ teensy35.menu.opt.o3purestd=Fastest + pure-code
 teensy35.menu.opt.o3purestd.build.flags.optimize=-O3 -mpure-code -D__PURE_CODE__
 teensy35.menu.opt.o3purestd.build.flags.ldspecs=
 teensy35.menu.opt.o3lto=Fastest with LTO
-teensy35.menu.opt.o3lto.build.flags.optimize=-O3 -flto -fno-fat-lto-objects
+teensy35.menu.opt.o3lto.build.flags.optimize=-O3 -flto=auto -fno-fat-lto-objects
 teensy35.menu.opt.o3lto.build.flags.ldspecs=-fuse-linker-plugin
 teensy35.menu.opt.o3purelto=Fastest + pure-code with LTO
-teensy35.menu.opt.o3purelto.build.flags.optimize=-O3 -mpure-code -D__PURE_CODE__ -flto -fno-fat-lto-objects
+teensy35.menu.opt.o3purelto.build.flags.optimize=-O3 -mpure-code -D__PURE_CODE__ -flto=auto -fno-fat-lto-objects
 teensy35.menu.opt.o3purelto.build.flags.ldspecs=-fuse-linker-plugin
 teensy35.menu.opt.ogstd=Debug
 teensy35.menu.opt.ogstd.build.flags.optimize=-Og
 teensy35.menu.opt.ogstd.build.flags.ldspecs=
 teensy35.menu.opt.oglto=Debug with LTO
-teensy35.menu.opt.oglto.build.flags.optimize=-Og -flto -fno-fat-lto-objects
+teensy35.menu.opt.oglto.build.flags.optimize=-Og -flto=auto -fno-fat-lto-objects
 teensy35.menu.opt.oglto.build.flags.ldspecs=-fuse-linker-plugin
 teensy35.menu.opt.osstd=Smallest Code
 teensy35.menu.opt.osstd.build.flags.optimize=-Os --specs=nano.specs
 teensy35.menu.opt.osstd.build.flags.ldspecs=
 teensy35.menu.opt.oslto=Smallest Code with LTO
-teensy35.menu.opt.oslto.build.flags.optimize=-Os -flto -fno-fat-lto-objects --specs=nano.specs
+teensy35.menu.opt.oslto.build.flags.optimize=-Os -flto=auto -fno-fat-lto-objects --specs=nano.specs
 teensy35.menu.opt.oslto.build.flags.ldspecs=-fuse-linker-plugin
 
 teensy35.menu.keys.en-us=US English
@@ -1229,10 +1247,10 @@ teensy31.build.flags.dep=-MMD
 teensy31.build.flags.optimize=-Os
 teensy31.build.flags.cpu=-mthumb -mcpu=cortex-m4 -fsingle-precision-constant
 teensy31.build.flags.defs=-D__MK20DX256__ -DTEENSYDUINO=160
-teensy31.build.flags.cpp=-fno-exceptions -fpermissive -felide-constructors -std=gnu++17 -Wno-error=narrowing -fno-rtti -Wno-psabi
+teensy31.build.flags.cpp=-fno-exceptions -fpermissive -felide-constructors -std=gnu++17 -Wno-error=narrowing -fno-rtti -Wno-psabi -Wno-maybe-uninitialized
 teensy31.build.flags.c=
 teensy31.build.flags.S=-x assembler-with-cpp
-teensy31.build.flags.ld=-Wl,--gc-sections,--relax,--defsym=__rtc_localtime={extra.time.local} "-T{build.core.path}/mk20dx256.ld"
+teensy31.build.flags.ld=-Wl,--gc-sections,--relax,--no-warn-rwx-segments,--defsym=__rtc_localtime={extra.time.local} "-T{build.core.path}/mk20dx256.ld"
 teensy31.build.flags.libs=-larm_cortexM4l_math -lm -lstdc++
 teensy31.serial.restart_cmd=false
 teensy31.menu.usb.serial=Serial
@@ -1350,13 +1368,13 @@ teensy31.menu.opt.o2std=Faster
 teensy31.menu.opt.o2std.build.flags.optimize=-O2
 teensy31.menu.opt.o2std.build.flags.ldspecs=
 teensy31.menu.opt.o2lto=Faster with LTO
-teensy31.menu.opt.o2lto.build.flags.optimize=-O2 -flto -fno-fat-lto-objects
+teensy31.menu.opt.o2lto.build.flags.optimize=-O2 -flto=auto -fno-fat-lto-objects
 teensy31.menu.opt.o2lto.build.flags.ldspecs=-fuse-linker-plugin
 teensy31.menu.opt.o1std=Fast
 teensy31.menu.opt.o1std.build.flags.optimize=-O1
 teensy31.menu.opt.o1std.build.flags.ldspecs=
 teensy31.menu.opt.o1lto=Fast with LTO
-teensy31.menu.opt.o1lto.build.flags.optimize=-O1 -flto -fno-fat-lto-objects
+teensy31.menu.opt.o1lto.build.flags.optimize=-O1 -flto=auto -fno-fat-lto-objects
 teensy31.menu.opt.o1lto.build.flags.ldspecs=-fuse-linker-plugin
 teensy31.menu.opt.o3std=Fastest
 teensy31.menu.opt.o3std.build.flags.optimize=-O3
@@ -1365,22 +1383,22 @@ teensy31.menu.opt.o3purestd=Fastest + pure-code
 teensy31.menu.opt.o3purestd.build.flags.optimize=-O3 -mpure-code -D__PURE_CODE__
 teensy31.menu.opt.o3purestd.build.flags.ldspecs=
 teensy31.menu.opt.o3lto=Fastest with LTO
-teensy31.menu.opt.o3lto.build.flags.optimize=-O3 -flto -fno-fat-lto-objects
+teensy31.menu.opt.o3lto.build.flags.optimize=-O3 -flto=auto -fno-fat-lto-objects
 teensy31.menu.opt.o3lto.build.flags.ldspecs=-fuse-linker-plugin
 teensy31.menu.opt.o3purelto=Fastest + pure-code with LTO
-teensy31.menu.opt.o3purelto.build.flags.optimize=-O3 -mpure-code -D__PURE_CODE__ -flto -fno-fat-lto-objects
+teensy31.menu.opt.o3purelto.build.flags.optimize=-O3 -mpure-code -D__PURE_CODE__ -flto=auto -fno-fat-lto-objects
 teensy31.menu.opt.o3purelto.build.flags.ldspecs=-fuse-linker-plugin
 teensy31.menu.opt.ogstd=Debug
 teensy31.menu.opt.ogstd.build.flags.optimize=-Og
 teensy31.menu.opt.ogstd.build.flags.ldspecs=
 teensy31.menu.opt.oglto=Debug with LTO
-teensy31.menu.opt.oglto.build.flags.optimize=-Og -flto -fno-fat-lto-objects
+teensy31.menu.opt.oglto.build.flags.optimize=-Og -flto=auto -fno-fat-lto-objects
 teensy31.menu.opt.oglto.build.flags.ldspecs=-fuse-linker-plugin
 teensy31.menu.opt.osstd=Smallest Code
 teensy31.menu.opt.osstd.build.flags.optimize=-Os --specs=nano.specs
 teensy31.menu.opt.osstd.build.flags.ldspecs=
 teensy31.menu.opt.oslto=Smallest Code with LTO
-teensy31.menu.opt.oslto.build.flags.optimize=-Os -flto -fno-fat-lto-objects --specs=nano.specs
+teensy31.menu.opt.oslto.build.flags.optimize=-Os -flto=auto -fno-fat-lto-objects --specs=nano.specs
 teensy31.menu.opt.oslto.build.flags.ldspecs=-fuse-linker-plugin
 
 teensy31.menu.keys.en-us=US English
@@ -1470,10 +1488,10 @@ teensy30.build.flags.dep=-MMD
 teensy30.build.flags.optimize=-Os
 teensy30.build.flags.cpu=-mthumb -mcpu=cortex-m4 -fsingle-precision-constant
 teensy30.build.flags.defs=-D__MK20DX128__ -DTEENSYDUINO=160
-teensy30.build.flags.cpp=-fno-exceptions -fpermissive -felide-constructors -std=gnu++17 -Wno-error=narrowing -fno-rtti -Wno-psabi
+teensy30.build.flags.cpp=-fno-exceptions -fpermissive -felide-constructors -std=gnu++17 -Wno-error=narrowing -fno-rtti -Wno-psabi -Wno-maybe-uninitialized
 teensy30.build.flags.c=
 teensy30.build.flags.S=-x assembler-with-cpp
-teensy30.build.flags.ld=-Wl,--gc-sections,--relax,--defsym=__rtc_localtime={extra.time.local} "-T{build.core.path}/mk20dx128.ld"
+teensy30.build.flags.ld=-Wl,--gc-sections,--relax,--no-warn-rwx-segments,--defsym=__rtc_localtime={extra.time.local} "-T{build.core.path}/mk20dx128.ld"
 teensy30.build.flags.ldspecs=--specs=nano.specs
 teensy30.build.flags.libs=-larm_cortexM4l_math -lm -lstdc++
 teensy30.serial.restart_cmd=false
@@ -1543,31 +1561,31 @@ teensy30.menu.opt.o2std=Faster
 teensy30.menu.opt.o2std.build.flags.optimize=-O2
 teensy30.menu.opt.o2std.build.flags.ldspecs=
 teensy30.menu.opt.o2lto=Faster with LTO
-teensy30.menu.opt.o2lto.build.flags.optimize=-O2 -flto -fno-fat-lto-objects
+teensy30.menu.opt.o2lto.build.flags.optimize=-O2 -flto=auto -fno-fat-lto-objects
 teensy30.menu.opt.o2lto.build.flags.ldspecs=-fuse-linker-plugin
 teensy30.menu.opt.o1std=Fast
 teensy30.menu.opt.o1std.build.flags.optimize=-O1
 teensy30.menu.opt.o1std.build.flags.ldspecs=
 teensy30.menu.opt.o1lto=Fast with LTO
-teensy30.menu.opt.o1lto.build.flags.optimize=-O1 -flto -fno-fat-lto-objects
+teensy30.menu.opt.o1lto.build.flags.optimize=-O1 -flto=auto -fno-fat-lto-objects
 teensy30.menu.opt.o1lto.build.flags.ldspecs=-fuse-linker-plugin
 teensy30.menu.opt.o3std=Fastest
 teensy30.menu.opt.o3std.build.flags.optimize=-O3
 teensy30.menu.opt.o3std.build.flags.ldspecs=
 teensy30.menu.opt.o3lto=Fastest with LTO
-teensy30.menu.opt.o3lto.build.flags.optimize=-O3 -flto -fno-fat-lto-objects
+teensy30.menu.opt.o3lto.build.flags.optimize=-O3 -flto=auto -fno-fat-lto-objects
 teensy30.menu.opt.o3lto.build.flags.ldspecs=-fuse-linker-plugin
 teensy30.menu.opt.ogstd=Debug
 teensy30.menu.opt.ogstd.build.flags.optimize=-Og
 teensy30.menu.opt.ogstd.build.flags.ldspecs=
 teensy30.menu.opt.oglto=Debug with LTO
-teensy30.menu.opt.oglto.build.flags.optimize=-Og -flto -fno-fat-lto-objects
+teensy30.menu.opt.oglto.build.flags.optimize=-Og -flto=auto -fno-fat-lto-objects
 teensy30.menu.opt.oglto.build.flags.ldspecs=-fuse-linker-plugin
 teensy30.menu.opt.osstd=Smallest Code
 teensy30.menu.opt.osstd.build.flags.optimize=-Os --specs=nano.specs
 teensy30.menu.opt.osstd.build.flags.ldspecs=
 teensy30.menu.opt.oslto=Smallest Code with LTO
-teensy30.menu.opt.oslto.build.flags.optimize=-Os -flto -fno-fat-lto-objects --specs=nano.specs
+teensy30.menu.opt.oslto.build.flags.optimize=-Os -flto=auto -fno-fat-lto-objects --specs=nano.specs
 teensy30.menu.opt.oslto.build.flags.ldspecs=-fuse-linker-plugin
 
 teensy30.menu.keys.en-us=US English
@@ -1646,10 +1664,10 @@ teensyLC.build.flags.common=-g -Wall -ffunction-sections -fdata-sections -nostdl
 teensyLC.build.flags.dep=-MMD
 teensyLC.build.flags.cpu=-mthumb -mcpu=cortex-m0plus -fsingle-precision-constant
 teensyLC.build.flags.defs=-D__MKL26Z64__ -DTEENSYDUINO=160
-teensyLC.build.flags.cpp=-fno-exceptions -fpermissive -felide-constructors -std=gnu++17 -Wno-error=narrowing -fno-rtti -Wno-psabi
+teensyLC.build.flags.cpp=-fno-exceptions -fpermissive -felide-constructors -std=gnu++17 -Wno-error=narrowing -fno-rtti -Wno-psabi -Wno-maybe-uninitialized
 teensyLC.build.flags.c=
 teensyLC.build.flags.S=-x assembler-with-cpp
-teensyLC.build.flags.ld=-Wl,--gc-sections,--relax,--defsym=__rtc_localtime={extra.time.local} "-T{build.core.path}/mkl26z64.ld"
+teensyLC.build.flags.ld=-Wl,--gc-sections,--relax,--no-warn-rwx-segments,--defsym=__rtc_localtime={extra.time.local} "-T{build.core.path}/mkl26z64.ld"
 teensyLC.build.flags.libs=-larm_cortexM0l_math -lm -lstdc++
 teensyLC.serial.restart_cmd=false
 teensyLC.menu.usb.serial=Serial
@@ -1717,31 +1735,31 @@ teensyLC.menu.opt.osstd=Smallest Code
 teensyLC.menu.opt.osstd.build.flags.optimize=-Os --specs=nano.specs
 teensyLC.menu.opt.osstd.build.flags.ldspecs=
 teensyLC.menu.opt.oslto=Smallest Code with LTO
-teensyLC.menu.opt.oslto.build.flags.optimize=-Os -flto -fno-fat-lto-objects --specs=nano.specs
+teensyLC.menu.opt.oslto.build.flags.optimize=-Os -flto=auto -fno-fat-lto-objects --specs=nano.specs
 teensyLC.menu.opt.oslto.build.flags.ldspecs=-fuse-linker-plugin
 teensyLC.menu.opt.ogstd=Debug
 teensyLC.menu.opt.ogstd.build.flags.optimize=-Og
 teensyLC.menu.opt.ogstd.build.flags.ldspecs=
 teensyLC.menu.opt.oglto=Debug with LTO
-teensyLC.menu.opt.oglto.build.flags.optimize=-Og -flto -fno-fat-lto-objects
+teensyLC.menu.opt.oglto.build.flags.optimize=-Og -flto=auto -fno-fat-lto-objects
 teensyLC.menu.opt.oglto.build.flags.ldspecs=-fuse-linker-plugin
 teensyLC.menu.opt.o3std=Fastest
 teensyLC.menu.opt.o3std.build.flags.optimize=-O3
 teensyLC.menu.opt.o3std.build.flags.ldspecs=
 teensyLC.menu.opt.o3lto=Fastest with LTO
-teensyLC.menu.opt.o3lto.build.flags.optimize=-O3 -flto -fno-fat-lto-objects
+teensyLC.menu.opt.o3lto.build.flags.optimize=-O3 -flto=auto -fno-fat-lto-objects
 teensyLC.menu.opt.o3lto.build.flags.ldspecs=-fuse-linker-plugin
 teensyLC.menu.opt.o2std=Faster
 teensyLC.menu.opt.o2std.build.flags.optimize=-O2
 teensyLC.menu.opt.o2std.build.flags.ldspecs=
 teensyLC.menu.opt.o2lto=Faster with LTO
-teensyLC.menu.opt.o2lto.build.flags.optimize=-O2 -flto -fno-fat-lto-objects
+teensyLC.menu.opt.o2lto.build.flags.optimize=-O2 -flto=auto -fno-fat-lto-objects
 teensyLC.menu.opt.o2lto.build.flags.ldspecs=-fuse-linker-plugin
 teensyLC.menu.opt.o1std=Fast
 teensyLC.menu.opt.o1std.build.flags.optimize=-O1
 teensyLC.menu.opt.o1std.build.flags.ldspecs=
 teensyLC.menu.opt.o1lto=Fast with LTO
-teensyLC.menu.opt.o1lto.build.flags.optimize=-O1 -flto -fno-fat-lto-objects
+teensyLC.menu.opt.o1lto.build.flags.optimize=-O1 -flto=auto -fno-fat-lto-objects
 teensyLC.menu.opt.o1lto.build.flags.ldspecs=-fuse-linker-plugin
 
 teensyLC.menu.keys.en-us=US English