Finally I compiled offline but now I cannot link

Mbed OS
1

online it is 103k flash
offline: `FLASH’ overflowed by 49k !

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(workspace) C:\workspace\v12>mbed config - - global GCC_ARM_PATH “C:\Program Files (x86)\GNU Tools ARM Embedded\5.3 2016q1\bin”
[mbed] C:\Program Files (x86)\GNU Tools ARM Embedded\5.3 2016q1\bin now set as global GCC_ARM_PATH

(workspace) C:\workspace\v12>mbed compile -t GCC_ARM -m NUCLEO_F072RB - - profile mbed-os/tools/profiles/small.json
Building project v12 (NUCLEO_F072RB, GCC_ARM)
Scan: .
Scan: FEATURE_BLE
Scan: FEATURE_COMMON_PAL
Scan: FEATURE_LWIP
Scan: FEATURE_UVISOR
Scan: FEATURE_LOWPAN_BORDER_ROUTER
Scan: FEATURE_LOWPAN_HOST
Scan: FEATURE_LOWPAN_ROUTER
Scan: FEATURE_NANOSTACK
Scan: FEATURE_NANOSTACK_FULL
Scan: FEATURE_THREAD_BORDER_ROUTER
Scan: FEATURE_THREAD_END_DEVICE
Scan: FEATURE_THREAD_ROUTER
Scan: FEATURE_STORAGE
Scan: mbed
Scan: env
Link: v12
c:/program files (x86)/gnu tools arm embedded/5.3 2016q1/bin/…/lib/gcc/arm-none-eabi/5.3.1/…/…/…/…/arm-none-eabi/bin/ld.exe: ./.build/NUCLEO_F072RB/GCC_ARM/v12.elf section .text' will not fit in region FLASH’
c:/program files (x86)/gnu tools arm embedded/5.3 2016q1/bin/…/lib/gcc/arm-none-eabi/5.3.1/…/…/…/…/arm-none-eabi/bin/ld.exe: ./.build/NUCLEO_F072RB/GCC_ARM/v12.elf section .bss' will not fit in region RAM’
c:/program files (x86)/gnu tools arm embedded/5.3 2016q1/bin/…/lib/gcc/arm-none-eabi/5.3.1/…/…/…/…/arm-none-eabi/bin/ld.exe: region RAM overflowed with stack
c:/program files (x86)/gnu tools arm embedded/5.3 2016q1/bin/…/lib/gcc/arm-none-eabi/5.3.1/…/…/…/…/arm-none-eabi/bin/ld.exe: region FLASH' overflowed by 48284 bytes c:/program files (x86)/gnu tools arm embedded/5.3 2016q1/bin/../lib/gcc/arm-none-eabi/5.3.1/../../../../arm-none-eabi/bin/ld.exe: region RAM’ overflowed by 352 bytes
./.build/NUCLEO_F072RB/GCC_ARM/Cairo_V10-072_GCC_ARM/main.o: In function main': main.cpp:(.text.startup.main+0x6c): undefined reference to Init_Usart2()’
collect2.exe: error: ld returned 1 exit status
[ERROR] c:/program files (x86)/gnu tools arm embedded/5.3 2016q1/bin/…/lib/gcc/arm-none-eabi/5.3.1/…/…/…/…/arm-none-eabi/bin/ld.exe: ./.build/NUCLEO_F072RB/GCC_ARM/v12.elf section .text' will not fit in region FLASH’
c:/program files (x86)/gnu tools arm embedded/5.3 2016q1/bin/…/lib/gcc/arm-none-eabi/5.3.1/…/…/…/…/arm-none-eabi/bin/ld.exe: ./.build/NUCLEO_F072RB/GCC_ARM/v12.elf section .bss' will not fit in region RAM’
c:/program files (x86)/gnu tools arm embedded/5.3 2016q1/bin/…/lib/gcc/arm-none-eabi/5.3.1/…/…/…/…/arm-none-eabi/bin/ld.exe: region RAM overflowed with stack
c:/program files (x86)/gnu tools arm embedded/5.3 2016q1/bin/…/lib/gcc/arm-none-eabi/5.3.1/…/…/…/…/arm-none-eabi/bin/ld.exe: region FLASH' overflowed by 48284 bytes c:/program files (x86)/gnu tools arm embedded/5.3 2016q1/bin/../lib/gcc/arm-none-eabi/5.3.1/../../../../arm-none-eabi/bin/ld.exe: region RAM’ overflowed by 352 bytes
./.build/NUCLEO_F072RB/GCC_ARM/Cairo_V10-072_GCC_ARM/main.o: In function main': main.cpp:(.text.startup.main+0x6c): undefined reference to Init_Usart2()’
collect2.exe: error: ld returned 1 exit status

[mbed] ERROR: “python” returned error code 1.
[mbed] ERROR: Command “python -u C:\workspace\v12\mbed-os\tools\make.py -t GCC_ARM -m NUCLEO_F072RB --source . --build ..build\NUCLEO_F072RB\GCC_ARM --profile mbed-os/tools/profiles/small.json” in “C:\workspace\v12”

(workspace) C:\workspace\v12>mbed compile -t GCC_ARM -m NUCLEO_F072RB --profile mbed-os/tools/profiles/small.json

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2

Hello,

Our online tools compile with the ARM toolchain. It does a better job of optimizing for size. Do you have a license for the Keil MDK? If so, you will be able to compile offline with ARM.

Cheers,
Sarah

3

Hi,
thanks for the response,

no I dont own a license for MKD… :frowning:

I refuse to crack a copy,

so, I have ordered a new board with more memory,
hopefully the code will still be stable.

4

Is this the most compact I can hope for from GCC_ARM ?

C:\workspace\v12>mbed compile -t GCC_ARM -m NUCLEO_F072RB - - profile mbed-os/tools/profiles/small.json

is the small.json profile 100% compatible with GCC_ARM compiler ?

are there any other flags/directives/methods for the GCC compiler that would help reduce the size ?

5

I have downloaded and installed MDK522 and licensed for the Cortex-M0

luckily my project is using the M0.

it compiles now, but still oversize :frowning:

online with 103k, with my CAN code and CANnucleo which is now depreciated in mbedOS
offline 112k. without any CAN code

are there other flags I can adjust ?
like:
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// Configuration parameters
MBED_CONF_EVENTS_PRESENT 1 // set by library:events
MBED_CONF_RTOS_PRESENT 1 // set by library:rtos
MBED_CONF_PLATFORM_STDIO_BAUD_RATE 9600 // set by library:platform
MBED_CONF_NSAPI_PRESENT 1 // set by library:nsapi
MBED_CONF_PLATFORM_DEFAULT_SERIAL_BAUD_RATE 9600 // set by library:platform
MBED_CONF_PLATFORM_STDIO_FLUSH_AT_EXIT 1 // set by library:platform
MBED_CONF_PLATFORM_STDIO_CONVERT_NEWLINES 0 // set by library:platform
// Macros
UNITY_INCLUDE_CONFIG_H // defined by library:utest
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6

Are you still using the small build profile?

7

Yes, but if you check my other post, the RAM may be the problem,

There is only 1k free and its complaining about no stack being allocated.

I don’t expect my stack to go much over 0x100 bytes…