Optimized (non-optiboot) Melzi env (#20021)

Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>

Marlin/src/pins/pins.h

 //
 
 #elif MB(SANGUINOLOLU_11)
-  #include "sanguino/pins_SANGUINOLOLU_11.h"    // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
+  #include "sanguino/pins_SANGUINOLOLU_11.h"    // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p env:sanguino1284p_optimized
 #elif MB(SANGUINOLOLU_12)
-  #include "sanguino/pins_SANGUINOLOLU_12.h"    // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
+  #include "sanguino/pins_SANGUINOLOLU_12.h"    // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p env:sanguino1284p_optimized
 #elif MB(MELZI)
-  #include "sanguino/pins_MELZI.h"              // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
+  #include "sanguino/pins_MELZI.h"              // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p env:sanguino1284p_optimized
 #elif MB(MELZI_V2)
-  #include "sanguino/pins_MELZI_V2.h"           // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
+  #include "sanguino/pins_MELZI_V2.h"           // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p env:sanguino1284p_optimized
 #elif MB(MELZI_MAKR3D)
-  #include "sanguino/pins_MELZI_MAKR3D.h"       // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
+  #include "sanguino/pins_MELZI_MAKR3D.h"       // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p env:sanguino1284p_optimized
 #elif MB(MELZI_CREALITY)
-  #include "sanguino/pins_MELZI_CREALITY.h"     // ATmega1284P                            env:melzi env:melzi_optimized env:melzi_optiboot
+  #include "sanguino/pins_MELZI_CREALITY.h"     // ATmega1284P                            env:melzi env:melzi_optimized env:melzi_optiboot env:melzi_optiboot_optimized
 #elif MB(MELZI_MALYAN)
-  #include "sanguino/pins_MELZI_MALYAN.h"       // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
+  #include "sanguino/pins_MELZI_MALYAN.h"       // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p env:sanguino1284p_optimized
 #elif MB(MELZI_TRONXY)
-  #include "sanguino/pins_MELZI_TRONXY.h"       // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
+  #include "sanguino/pins_MELZI_TRONXY.h"       // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p env:sanguino1284p_optimized
 #elif MB(STB_11)
-  #include "sanguino/pins_STB_11.h"             // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
+  #include "sanguino/pins_STB_11.h"             // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p env:sanguino1284p_optimized
 #elif MB(AZTEEG_X1)
-  #include "sanguino/pins_AZTEEG_X1.h"          // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
+  #include "sanguino/pins_AZTEEG_X1.h"          // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p env:sanguino1284p_optimized
 #elif MB(ZMIB_V2)
-  #include "sanguino/pins_ZMIB_V2.h"            // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
+  #include "sanguino/pins_ZMIB_V2.h"            // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p env:sanguino1284p_optimized
 
 //
 // Other ATmega644P, ATmega644, ATmega1284P
 #elif MB(GEN3_MONOLITHIC)
   #include "sanguino/pins_GEN3_MONOLITHIC.h"    // ATmega644P                             env:sanguino644p
 #elif MB(GEN3_PLUS)
-  #include "sanguino/pins_GEN3_PLUS.h"          // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
+  #include "sanguino/pins_GEN3_PLUS.h"          // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p env:sanguino1284p_optimized
 #elif MB(GEN6)
-  #include "sanguino/pins_GEN6.h"               // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
+  #include "sanguino/pins_GEN6.h"               // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p env:sanguino1284p_optimized
 #elif MB(GEN6_DELUXE)
-  #include "sanguino/pins_GEN6_DELUXE.h"        // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
+  #include "sanguino/pins_GEN6_DELUXE.h"        // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p env:sanguino1284p_optimized
 #elif MB(GEN7_CUSTOM)
-  #include "sanguino/pins_GEN7_CUSTOM.h"        // ATmega644P, ATmega644, ATmega1284P     env:sanguino644p env:sanguino1284p
+  #include "sanguino/pins_GEN7_CUSTOM.h"        // ATmega644P, ATmega644, ATmega1284P     env:sanguino644p env:sanguino1284p env:sanguino1284p_optimized
 #elif MB(GEN7_12)
-  #include "sanguino/pins_GEN7_12.h"            // ATmega644P, ATmega644, ATmega1284P     env:sanguino644p env:sanguino1284p
+  #include "sanguino/pins_GEN7_12.h"            // ATmega644P, ATmega644, ATmega1284P     env:sanguino644p env:sanguino1284p env:sanguino1284p_optimized
 #elif MB(GEN7_13)
-  #include "sanguino/pins_GEN7_13.h"            // ATmega644P, ATmega644, ATmega1284P     env:sanguino644p env:sanguino1284p
+  #include "sanguino/pins_GEN7_13.h"            // ATmega644P, ATmega644, ATmega1284P     env:sanguino644p env:sanguino1284p env:sanguino1284p_optimized
 #elif MB(GEN7_14)
-  #include "sanguino/pins_GEN7_14.h"            // ATmega644P, ATmega644, ATmega1284P     env:sanguino644p env:sanguino1284p
+  #include "sanguino/pins_GEN7_14.h"            // ATmega644P, ATmega644, ATmega1284P     env:sanguino644p env:sanguino1284p env:sanguino1284p_optimized
 #elif MB(OMCA_A)
   #include "sanguino/pins_OMCA_A.h"             // ATmega644                              env:sanguino644p
 #elif MB(OMCA)
   #include "sanguino/pins_OMCA.h"               // ATmega644P, ATmega644                  env:sanguino644p
 #elif MB(ANET_10)
-  #include "sanguino/pins_ANET_10.h"            // ATmega1284P                            env:sanguino1284p
+  #include "sanguino/pins_ANET_10.h"            // ATmega1284P                            env:sanguino1284p env:sanguino1284p_optimized
 #elif MB(SETHI)
-  #include "sanguino/pins_SETHI.h"              // ATmega644P, ATmega644, ATmega1284P     env:sanguino644p env:sanguino1284p
+  #include "sanguino/pins_SETHI.h"              // ATmega644P, ATmega644, ATmega1284P     env:sanguino644p env:sanguino1284p env:sanguino1284p_optimized
 
 //
 // Teensyduino - AT90USB1286, AT90USB1286P

platformio.ini

 # ATmega2560
 #
 [env:mega2560]
-platform            = atmelavr
-extends             = common_avr8
-board               = megaatmega2560
+platform = atmelavr
+extends  = common_avr8
+board    = megaatmega2560
 
 #
 # ATmega2560 with extended pins 70-85 defined
 # ATmega1280
 #
 [env:mega1280]
-platform      = atmelavr
-extends       = common_avr8
-board         = megaatmega1280
+platform = atmelavr
+extends  = common_avr8
+board    = megaatmega1280
 
 #
 # MightyBoard ATmega2560 (MegaCore 100 pin boards variants)
 # MightyBoard ATmega2560 (MegaCore 100 pin boards variants)
 #
 [env:MightyBoard2560]
-platform      = atmelavr
-extends       = common_avr8
-board         = ATmega2560
-upload_protocol = wiring
-upload_speed  = 57600
+platform                  = atmelavr
+extends                   = common_avr8
+board                     = ATmega2560
+upload_protocol           = wiring
+upload_speed              = 57600
 board_upload.maximum_size = 253952
 
 #
 # RAMBo
 #
 [env:rambo]
-platform      = atmelavr
-extends       = common_avr8
-board         = reprap_rambo
+platform = atmelavr
+extends  = common_avr8
+board    = reprap_rambo
 
 #
 # FYSETC F6 V1.3
 #
 [env:FYSETC_F6_13]
-platform      = atmelavr
-extends       = common_avr8
-board         = fysetc_f6_13
+platform = atmelavr
+extends  = common_avr8
+board    = fysetc_f6_13
 
 #
 # FYSETC F6 V1.4
 #
 [env:FYSETC_F6_14]
-platform      = atmelavr
-extends       = common_avr8
-board         = fysetc_f6_14
+platform = atmelavr
+extends  = common_avr8
+board    = fysetc_f6_14
 
 #
 # Sanguinololu (ATmega644p)
 #
 [env:sanguino644p]
-platform      = atmelavr
-extends       = common_avr8
-board         = sanguino_atmega644p
+platform = atmelavr
+extends  = common_avr8
+board    = sanguino_atmega644p
 
 #
 # Sanguinololu (ATmega1284p)
 #
 [env:sanguino1284p]
-platform      = atmelavr
-extends       = common_avr8
-board         = sanguino_atmega1284p
+platform                  = atmelavr
+extends                   = common_avr8
+board                     = sanguino_atmega1284p
 board_upload.maximum_size = 126976
 
 #
 # Melzi and clones (ATmega1284p)
 #
 [env:melzi]
-platform      = atmelavr
-extends       = common_avr8
-board         = sanguino_atmega1284p
-upload_speed  = 57600
-board_upload.maximum_size = 126976
+platform     = atmelavr
+extends      = env:sanguino1284p
+upload_speed = 57600
+
+#
+# Sanguinololu (ATmega1284p stock bootloader with tuned flags)
+#
+
+[tuned_1284p]
+build_flags = ${common.build_flags} -fno-tree-scev-cprop -fno-split-wide-types -Wl,--relax -mcall-prologues
+
+[env:sanguino1284p_optimized]
+platform    = atmelavr
+extends     = env:melzi
+build_flags = ${tuned_1284p.build_flags}
+
+#
+# Melzi and clones (alias for sanguino1284p_optimized)
+#
+[env:melzi_optimized]
+platform = atmelavr
+extends  = env:sanguino1284p_optimized
 
 #
 # Melzi and clones (Optiboot bootloader)
 #
 [env:melzi_optiboot]
-platform      = atmelavr
-extends       = common_avr8
-board         = sanguino_atmega1284p
-upload_speed  = 115200
+platform     = atmelavr
+extends      = common_avr8
+board        = sanguino_atmega1284p
+upload_speed = 115200
 
 #
 # Melzi and clones (Zonestar Melzi2 with tuned flags)
 #
-[env:melzi_optimized]
-platform      = atmelavr
-extends       = env:melzi_optiboot
-build_flags   = ${common.build_flags} -fno-tree-scev-cprop -fno-split-wide-types -Wl,--relax -mcall-prologues
-build_unflags = -g -ggdb
+[env:melzi_optiboot_optimized]
+platform    = atmelavr
+extends     = env:melzi_optiboot
+build_flags = ${tuned_1284p.build_flags}
 
 #
 # AT90USB1286 boards using CDC bootloader
 # - TEENSYLU
 #
 [env:at90usb1286_cdc]
-platform      = teensy
-extends       = common_avr8
-board         = at90usb1286
-lib_ignore    = ${env:common_avr8.lib_ignore}, Teensy_ADC, NativeEthernet
+platform   = teensy
+extends    = common_avr8
+board      = at90usb1286
+lib_ignore = ${env:common_avr8.lib_ignore}, Teensy_ADC, NativeEthernet
 
 #
 # AT90USB1286 boards using DFU bootloader
 # - ? 5DPRINT ?
 #
 [env:at90usb1286_dfu]
-platform      = teensy
-extends       = env:at90usb1286_cdc
+platform = teensy
+extends  = env:at90usb1286_cdc
 
 #################################
 #                               #
 #  - RADDS
 #
 [env:DUE]
-platform      = atmelsam
-board         = due
-src_filter    = ${common.default_src_filter} +<src/HAL/DUE> +<src/HAL/shared/backtrace>
+platform   = atmelsam
+board      = due
+src_filter = ${common.default_src_filter} +<src/HAL/DUE> +<src/HAL/shared/backtrace>
 
 [env:DUE_USB]
-platform      = atmelsam
-extends       = env:DUE
-board         = dueUSB
+platform = atmelsam
+extends  = env:DUE
+board    = dueUSB
 
 [env:DUE_debug]
 # Used when WATCHDOG_RESET_MANUAL is enabled
-platform      = atmelsam
-extends       = env:DUE
-build_flags   = ${common.build_flags}
+platform    = atmelsam
+extends     = env:DUE
+build_flags = ${common.build_flags}
   -funwind-tables
   -mpoke-function-name
 
 # Archim SAM
 #
 [common_DUE_archim]
-platform      = atmelsam
-extends       = env:DUE
-board         = archim
-build_flags   = ${common.build_flags}
+platform                 = atmelsam
+extends                  = env:DUE
+board                    = archim
+build_flags              = ${common.build_flags}
   -DARDUINO_SAM_ARCHIM -DARDUINO_ARCH_SAM -D__SAM3X8E__ -DUSBCON
 board_build.variants_dir = buildroot/share/PlatformIO/variants/
-extra_scripts = ${common.extra_scripts}
+extra_scripts            = ${common.extra_scripts}
   Marlin/src/HAL/DUE/upload_extra_script.py
 
 [env:DUE_archim]
-platform      = ${common_DUE_archim.platform}
-extends       = common_DUE_archim
+platform = ${common_DUE_archim.platform}
+extends  = common_DUE_archim
 
 # Used when WATCHDOG_RESET_MANUAL is enabled
 [env:DUE_archim_debug]
-platform      = ${common_DUE_archim.platform}
-extends       = common_DUE_archim
-build_flags   = ${common_DUE_archim.build_flags} -funwind-tables -mpoke-function-name
+platform    = ${common_DUE_archim.platform}
+extends     = common_DUE_archim
+build_flags = ${common_DUE_archim.build_flags} -funwind-tables -mpoke-function-name
 
 #################################
 #                               #
 # NXP LPC176x ARM Cortex-M3
 #
 [env:LPC1768]
-platform  = ${common_LPC.platform}
-extends   = common_LPC
-board     = nxp_lpc1768
+platform = ${common_LPC.platform}
+extends  = common_LPC
+board    = nxp_lpc1768
 
 [env:LPC1769]
-platform  = ${common_LPC.platform}
-extends   = common_LPC
-board     = nxp_lpc1769
+platform = ${common_LPC.platform}
+extends  = common_LPC
+board    = nxp_lpc1769
 
 #################################
 #                               #