replace *(.init_array .init_array.*) with KEEP(*(.init_array .init_array.*)).
The KEEP statement within a linker script will instruct the linker to keep the specified section, even if no symbols inside it are referenced. This statement is used within the SECTIONS section of the linker script. This becomes relevant when garbage collection is performed at link time, enabled by passing the --gc-sections switch to the linker. The KEEP statement instructs the linker to use the specified section as a root node when creating a dependency graph, looking for unused sections. Essentially forcing the section to be marked as used.
Signed-off-by: cuiziwei <cuiziwei@xiaomi.com>
Add support for the STM32G474 family of microcontrollers and the
B-G474E-DPOW1 Discovery Board, which features a STM32G474RET6.
This is a major pull request as it adds support for an entirely
new family of STM32. This support is implemented in
arch/arm/src/stm32 and shares implementation with other STM32
families supported by that code, such as the 'L15xx, 'F10xx,
'F20xx, 'F3xxx, and 'F4xxx.
boards/Kconfig:
* Make NuttX recognize the existence of b-g474e-dpow1,
the B-G474E-DPOW1 Discovery Board.
boards/arm/stm32/b-g474e-dpow1/Kconfig:
boards/arm/stm32/b-g474e-dpow1/README.txt:
boards/arm/stm32/b-g474e-dpow1/configs/nsh/defconfig:
boards/arm/stm32/b-g474e-dpow1/include/board.h:
boards/arm/stm32/b-g474e-dpow1/scripts/Make.defs:
boards/arm/stm32/b-g474e-dpow1/scripts/ld.script:
boards/arm/stm32/b-g474e-dpow1/src/.gitignore:
boards/arm/stm32/b-g474e-dpow1/src/Make.defs:
boards/arm/stm32/b-g474e-dpow1/src/b-g474e-dpow1.h:
boards/arm/stm32/b-g474e-dpow1/src/stm32_appinit.c:
boards/arm/stm32/b-g474e-dpow1/src/stm32_autoleds.c:
boards/arm/stm32/b-g474e-dpow1/src/stm32_boot.c:
boards/arm/stm32/b-g474e-dpow1/src/stm32_userleds.c:
* Add minimal support for the B-G474E-DPOW1 Discovery
Board. The board boots successfully through to the
NSH prompt. NSH runs and is responsive.
With big thanks for detailed code review and suggestions:
David Sidrane (davids5)
Mateusz Szafoni (raiden00)
Abdelatif Guettouche (Ouss4)
